./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe030_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe030_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe030_tso.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-bcb38a6-m [2024-06-03 20:48:02,339 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:48:02,400 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:48:02,403 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:48:02,403 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:48:02,415 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:48:02,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:48:02,416 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:48:02,416 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:48:02,416 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:48:02,417 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:48:02,417 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:48:02,417 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:48:02,418 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:48:02,418 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:48:02,418 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:48:02,419 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:48:02,419 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:48:02,419 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:48:02,419 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:48:02,419 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:48:02,420 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:48:02,420 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:48:02,420 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:48:02,420 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:48:02,421 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:48:02,421 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:48:02,421 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:48:02,421 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:48:02,422 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:48:02,422 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:48:02,422 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:48:02,422 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:48:02,422 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:48:02,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:48:02,423 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:48:02,423 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:48:02,423 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:48:02,423 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:48:02,424 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:48:02,424 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:48:02,424 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:48:02,424 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:48:02,424 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:48:02,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:48:02,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:48:02,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:48:02,627 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:48:02,627 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:48:02,628 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe030_tso.yml/witness.yml [2024-06-03 20:48:02,726 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:48:02,726 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:48:02,727 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2024-06-03 20:48:03,696 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:48:03,961 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:48:03,962 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2024-06-03 20:48:03,974 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea262f999/0b40ef3e7cf242259222b6e8d8869f0f/FLAG0f5964040 [2024-06-03 20:48:03,984 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ea262f999/0b40ef3e7cf242259222b6e8d8869f0f [2024-06-03 20:48:03,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:48:03,985 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:48:03,986 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:48:03,986 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:48:03,990 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:48:03,990 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:48:02" (1/2) ... [2024-06-03 20:48:03,991 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2285e8b1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:48:03, skipping insertion in model container [2024-06-03 20:48:03,991 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:48:02" (1/2) ... [2024-06-03 20:48:03,992 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@93fad8d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:48:03, skipping insertion in model container [2024-06-03 20:48:03,992 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:48:03" (2/2) ... [2024-06-03 20:48:03,992 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2285e8b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:03, skipping insertion in model container [2024-06-03 20:48:03,992 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:48:03" (2/2) ... [2024-06-03 20:48:03,993 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:48:04,020 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:48:04,021 INFO L97 edCorrectnessWitness]: Location invariant before [L777-L777] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((((long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((((((((0 <= __unbuffered_cnt && 0 <= x) && 0 <= y) && 0 <= z) && z <= 2) && z <= 127) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2))) [2024-06-03 20:48:04,021 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((((long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((((((((0 <= __unbuffered_cnt && 0 <= x) && 0 <= y) && 0 <= z) && z <= 2) && z <= 127) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2))) [2024-06-03 20:48:04,021 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((((long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((((((((0 <= __unbuffered_cnt && 0 <= x) && 0 <= y) && 0 <= z) && z <= 2) && z <= 127) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2))) [2024-06-03 20:48:04,022 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:48:04,022 INFO L106 edCorrectnessWitness]: ghost_update [L775-L775] multithreaded = 1; [2024-06-03 20:48:04,042 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:48:04,267 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:48:04,277 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:48:04,392 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:48:04,423 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:48:04,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04 WrapperNode [2024-06-03 20:48:04,424 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:48:04,425 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:48:04,425 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:48:04,425 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:48:04,430 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04" (1/1) ... [2024-06-03 20:48:04,448 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04" (1/1) ... [2024-06-03 20:48:04,471 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2024-06-03 20:48:04,471 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:48:04,472 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:48:04,472 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:48:04,472 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:48:04,479 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04" (1/1) ... [2024-06-03 20:48:04,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04" (1/1) ... [2024-06-03 20:48:04,482 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04" (1/1) ... [2024-06-03 20:48:04,491 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]. [2024-06-03 20:48:04,492 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04" (1/1) ... [2024-06-03 20:48:04,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04" (1/1) ... [2024-06-03 20:48:04,498 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04" (1/1) ... [2024-06-03 20:48:04,499 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04" (1/1) ... [2024-06-03 20:48:04,500 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04" (1/1) ... [2024-06-03 20:48:04,501 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04" (1/1) ... [2024-06-03 20:48:04,503 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:48:04,503 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:48:04,503 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:48:04,503 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:48:04,504 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04" (1/1) ... [2024-06-03 20:48:04,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:48:04,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:48:04,524 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) [2024-06-03 20:48:04,541 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 [2024-06-03 20:48:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:48:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:48:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:48:04,551 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:48:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:48:04,551 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:48:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:48:04,551 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:48:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:48:04,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:48:04,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:48:04,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:48:04,554 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:48:04,639 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:48:04,640 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:48:04,869 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:48:04,869 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:48:04,989 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:48:04,989 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:48:04,989 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:48:04 BoogieIcfgContainer [2024-06-03 20:48:04,990 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:48:04,991 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:48:04,991 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:48:04,993 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:48:04,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:48:02" (1/4) ... [2024-06-03 20:48:04,994 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7841d318 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:48:04, skipping insertion in model container [2024-06-03 20:48:04,994 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:48:03" (2/4) ... [2024-06-03 20:48:04,994 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7841d318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:48:04, skipping insertion in model container [2024-06-03 20:48:04,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:48:04" (3/4) ... [2024-06-03 20:48:04,995 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7841d318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:48:04, skipping insertion in model container [2024-06-03 20:48:04,995 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:48:04" (4/4) ... [2024-06-03 20:48:04,996 INFO L112 eAbstractionObserver]: Analyzing ICFG safe030_tso.i [2024-06-03 20:48:05,008 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:48:05,009 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:48:05,009 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:48:05,054 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:48:05,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:48:05,101 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 20:48:05,102 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:48:05,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:48:05,103 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:48:05,109 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 20:48:05,116 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:48:05,122 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;@3df0abb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:48:05,122 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:48:05,125 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:48:05,125 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:48:05,126 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:48:05,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:05,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:48:05,127 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)] === [2024-06-03 20:48:05,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:05,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2004445253, now seen corresponding path program 1 times [2024-06-03 20:48:05,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:05,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858896763] [2024-06-03 20:48:05,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:05,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:05,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858896763] [2024-06-03 20:48:05,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858896763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:05,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:05,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:48:05,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074002362] [2024-06-03 20:48:05,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:05,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:48:05,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:05,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:48:05,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:48:05,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:05,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:05,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:05,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:05,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:05,836 INFO L124 PetriNetUnfolderBase]: 946/1512 cut-off events. [2024-06-03 20:48:05,837 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-03 20:48:05,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3020 conditions, 1512 events. 946/1512 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7444 event pairs, 638 based on Foata normal form. 1/1443 useless extension candidates. Maximal degree in co-relation 3005. Up to 1431 conditions per place. [2024-06-03 20:48:05,852 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-03 20:48:05,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-03 20:48:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:48:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:48:05,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-03 20:48:05,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-03 20:48:05,864 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 78 transitions. [2024-06-03 20:48:05,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-03 20:48:05,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:05,869 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 20:48:05,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-03 20:48:05,874 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 20:48:05,874 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 20:48:05,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:05,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:05,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:05,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:48:05,875 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)] === [2024-06-03 20:48:05,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:05,876 INFO L85 PathProgramCache]: Analyzing trace with hash -2126518694, now seen corresponding path program 1 times [2024-06-03 20:48:05,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:05,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037853919] [2024-06-03 20:48:05,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:05,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:06,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:06,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:06,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037853919] [2024-06-03 20:48:06,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037853919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:06,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:06,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:48:06,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628940890] [2024-06-03 20:48:06,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:06,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:48:06,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:06,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:48:06,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:48:06,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:06,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:06,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:06,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:06,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:06,311 INFO L124 PetriNetUnfolderBase]: 940/1508 cut-off events. [2024-06-03 20:48:06,312 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2024-06-03 20:48:06,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3431 conditions, 1508 events. 940/1508 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7444 event pairs, 532 based on Foata normal form. 3/1474 useless extension candidates. Maximal degree in co-relation 3416. Up to 1407 conditions per place. [2024-06-03 20:48:06,320 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-03 20:48:06,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 238 flow [2024-06-03 20:48:06,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:48:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:48:06,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-03 20:48:06,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-03 20:48:06,324 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 101 transitions. [2024-06-03 20:48:06,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 238 flow [2024-06-03 20:48:06,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:48:06,327 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-03 20:48:06,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-03 20:48:06,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-03 20:48:06,327 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-03 20:48:06,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:06,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:06,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:06,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:48:06,330 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)] === [2024-06-03 20:48:06,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:06,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1497569362, now seen corresponding path program 1 times [2024-06-03 20:48:06,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:06,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931154877] [2024-06-03 20:48:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:06,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:06,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:06,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:06,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931154877] [2024-06-03 20:48:06,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931154877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:06,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:06,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:48:06,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597063446] [2024-06-03 20:48:06,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:06,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:48:06,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:06,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:48:06,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:48:06,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:06,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:06,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:06,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:06,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:06,645 INFO L124 PetriNetUnfolderBase]: 948/1554 cut-off events. [2024-06-03 20:48:06,646 INFO L125 PetriNetUnfolderBase]: For 829/829 co-relation queries the response was YES. [2024-06-03 20:48:06,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3904 conditions, 1554 events. 948/1554 cut-off events. For 829/829 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7855 event pairs, 366 based on Foata normal form. 5/1542 useless extension candidates. Maximal degree in co-relation 3887. Up to 1353 conditions per place. [2024-06-03 20:48:06,655 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 52 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-03 20:48:06,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 392 flow [2024-06-03 20:48:06,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:48:06,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:48:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-03 20:48:06,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2024-06-03 20:48:06,659 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 132 transitions. [2024-06-03 20:48:06,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 392 flow [2024-06-03 20:48:06,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 378 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 20:48:06,664 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-03 20:48:06,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-03 20:48:06,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-03 20:48:06,665 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-03 20:48:06,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:06,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:06,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:06,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:48:06,666 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:06,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:06,666 INFO L85 PathProgramCache]: Analyzing trace with hash -350088915, now seen corresponding path program 1 times [2024-06-03 20:48:06,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:06,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693701066] [2024-06-03 20:48:06,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:06,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:06,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:06,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:06,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693701066] [2024-06-03 20:48:06,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693701066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:06,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:06,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:06,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075408499] [2024-06-03 20:48:06,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:06,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:06,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:06,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:06,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:06,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:06,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 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) [2024-06-03 20:48:06,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:06,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:06,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:07,068 INFO L124 PetriNetUnfolderBase]: 960/1574 cut-off events. [2024-06-03 20:48:07,069 INFO L125 PetriNetUnfolderBase]: For 1961/1963 co-relation queries the response was YES. [2024-06-03 20:48:07,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4718 conditions, 1574 events. 960/1574 cut-off events. For 1961/1963 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7975 event pairs, 245 based on Foata normal form. 12/1569 useless extension candidates. Maximal degree in co-relation 4698. Up to 1321 conditions per place. [2024-06-03 20:48:07,077 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-03 20:48:07,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 495 flow [2024-06-03 20:48:07,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:07,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:07,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-03 20:48:07,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-03 20:48:07,080 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 152 transitions. [2024-06-03 20:48:07,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 495 flow [2024-06-03 20:48:07,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 487 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-03 20:48:07,086 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 291 flow [2024-06-03 20:48:07,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-03 20:48:07,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-03 20:48:07,088 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 291 flow [2024-06-03 20:48:07,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 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) [2024-06-03 20:48:07,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:07,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:07,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:48:07,088 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)] === [2024-06-03 20:48:07,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:07,089 INFO L85 PathProgramCache]: Analyzing trace with hash -734151125, now seen corresponding path program 1 times [2024-06-03 20:48:07,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:07,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362299568] [2024-06-03 20:48:07,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:07,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:07,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:07,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:07,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362299568] [2024-06-03 20:48:07,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362299568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:07,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:07,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:48:07,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214177379] [2024-06-03 20:48:07,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:07,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:48:07,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:07,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:48:07,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:48:07,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:07,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:07,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:07,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:07,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:07,457 INFO L124 PetriNetUnfolderBase]: 955/1562 cut-off events. [2024-06-03 20:48:07,457 INFO L125 PetriNetUnfolderBase]: For 2897/2897 co-relation queries the response was YES. [2024-06-03 20:48:07,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5151 conditions, 1562 events. 955/1562 cut-off events. For 2897/2897 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7874 event pairs, 354 based on Foata normal form. 2/1545 useless extension candidates. Maximal degree in co-relation 5128. Up to 1438 conditions per place. [2024-06-03 20:48:07,468 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 49 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2024-06-03 20:48:07,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 431 flow [2024-06-03 20:48:07,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:48:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:48:07,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-03 20:48:07,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:48:07,470 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 291 flow. Second operand 4 states and 96 transitions. [2024-06-03 20:48:07,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 431 flow [2024-06-03 20:48:07,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 381 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:07,473 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 263 flow [2024-06-03 20:48:07,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-03 20:48:07,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-03 20:48:07,474 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 263 flow [2024-06-03 20:48:07,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:07,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:07,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:07,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:48:07,475 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)] === [2024-06-03 20:48:07,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:07,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1299559337, now seen corresponding path program 1 times [2024-06-03 20:48:07,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:07,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528535737] [2024-06-03 20:48:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:07,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:07,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:07,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528535737] [2024-06-03 20:48:07,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528535737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:07,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:07,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:07,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385791399] [2024-06-03 20:48:07,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:07,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:07,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:07,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:07,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:07,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:07,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 263 flow. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:07,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:07,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:07,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:07,859 INFO L124 PetriNetUnfolderBase]: 957/1575 cut-off events. [2024-06-03 20:48:07,859 INFO L125 PetriNetUnfolderBase]: For 3318/3318 co-relation queries the response was YES. [2024-06-03 20:48:07,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5140 conditions, 1575 events. 957/1575 cut-off events. For 3318/3318 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7873 event pairs, 334 based on Foata normal form. 3/1576 useless extension candidates. Maximal degree in co-relation 5116. Up to 1413 conditions per place. [2024-06-03 20:48:07,867 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 57 selfloop transitions, 18 changer transitions 0/81 dead transitions. [2024-06-03 20:48:07,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 81 transitions, 533 flow [2024-06-03 20:48:07,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 20:48:07,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:48:07,868 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 263 flow. Second operand 7 states and 154 transitions. [2024-06-03 20:48:07,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 81 transitions, 533 flow [2024-06-03 20:48:07,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 81 transitions, 513 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:07,872 INFO L231 Difference]: Finished difference. Result has 61 places, 62 transitions, 366 flow [2024-06-03 20:48:07,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=366, PETRI_PLACES=61, PETRI_TRANSITIONS=62} [2024-06-03 20:48:07,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-03 20:48:07,873 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 62 transitions, 366 flow [2024-06-03 20:48:07,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 6 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:07,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:07,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:07,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:48:07,873 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)] === [2024-06-03 20:48:07,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:07,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1637354200, now seen corresponding path program 1 times [2024-06-03 20:48:07,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:07,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317705263] [2024-06-03 20:48:07,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:07,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:07,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:08,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:08,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317705263] [2024-06-03 20:48:08,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317705263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:08,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:08,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:48:08,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937548243] [2024-06-03 20:48:08,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:08,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:48:08,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:08,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:48:08,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:48:08,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:08,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 62 transitions, 366 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:08,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:08,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:08,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:08,188 INFO L124 PetriNetUnfolderBase]: 963/1594 cut-off events. [2024-06-03 20:48:08,188 INFO L125 PetriNetUnfolderBase]: For 4978/4982 co-relation queries the response was YES. [2024-06-03 20:48:08,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5803 conditions, 1594 events. 963/1594 cut-off events. For 4978/4982 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7988 event pairs, 337 based on Foata normal form. 8/1599 useless extension candidates. Maximal degree in co-relation 5777. Up to 1375 conditions per place. [2024-06-03 20:48:08,197 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 61 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2024-06-03 20:48:08,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 620 flow [2024-06-03 20:48:08,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:48:08,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:48:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-03 20:48:08,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:48:08,199 INFO L175 Difference]: Start difference. First operand has 61 places, 62 transitions, 366 flow. Second operand 5 states and 125 transitions. [2024-06-03 20:48:08,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 620 flow [2024-06-03 20:48:08,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 85 transitions, 586 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:08,205 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 402 flow [2024-06-03 20:48:08,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=402, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-03 20:48:08,205 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-03 20:48:08,206 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 402 flow [2024-06-03 20:48:08,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:08,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:08,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:08,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:48:08,206 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)] === [2024-06-03 20:48:08,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:08,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1144557430, now seen corresponding path program 2 times [2024-06-03 20:48:08,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:08,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658694328] [2024-06-03 20:48:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:08,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:08,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:08,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658694328] [2024-06-03 20:48:08,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658694328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:08,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:08,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:48:08,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218635354] [2024-06-03 20:48:08,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:08,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:48:08,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:08,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:48:08,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:48:08,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:08,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 402 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:08,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:08,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:08,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:08,524 INFO L124 PetriNetUnfolderBase]: 951/1567 cut-off events. [2024-06-03 20:48:08,524 INFO L125 PetriNetUnfolderBase]: For 5661/5667 co-relation queries the response was YES. [2024-06-03 20:48:08,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5833 conditions, 1567 events. 951/1567 cut-off events. For 5661/5667 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7810 event pairs, 351 based on Foata normal form. 3/1564 useless extension candidates. Maximal degree in co-relation 5806. Up to 1359 conditions per place. [2024-06-03 20:48:08,534 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-03 20:48:08,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 588 flow [2024-06-03 20:48:08,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:48:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:48:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-03 20:48:08,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-03 20:48:08,535 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 402 flow. Second operand 5 states and 121 transitions. [2024-06-03 20:48:08,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 588 flow [2024-06-03 20:48:08,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 561 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 20:48:08,542 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 421 flow [2024-06-03 20:48:08,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=421, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-03 20:48:08,543 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-03 20:48:08,543 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 421 flow [2024-06-03 20:48:08,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:08,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:08,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:08,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:48:08,543 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)] === [2024-06-03 20:48:08,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:08,544 INFO L85 PathProgramCache]: Analyzing trace with hash -194722984, now seen corresponding path program 1 times [2024-06-03 20:48:08,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:08,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258170679] [2024-06-03 20:48:08,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:08,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:08,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:08,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258170679] [2024-06-03 20:48:08,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258170679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:08,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:08,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:08,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245732555] [2024-06-03 20:48:08,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:08,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:08,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:08,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:08,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:08,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:08,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 421 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:08,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:08,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:08,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:08,936 INFO L124 PetriNetUnfolderBase]: 1099/1788 cut-off events. [2024-06-03 20:48:08,936 INFO L125 PetriNetUnfolderBase]: For 7243/7247 co-relation queries the response was YES. [2024-06-03 20:48:08,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6826 conditions, 1788 events. 1099/1788 cut-off events. For 7243/7247 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9025 event pairs, 320 based on Foata normal form. 10/1789 useless extension candidates. Maximal degree in co-relation 6798. Up to 1435 conditions per place. [2024-06-03 20:48:08,948 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 74 selfloop transitions, 32 changer transitions 0/112 dead transitions. [2024-06-03 20:48:08,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 112 transitions, 861 flow [2024-06-03 20:48:08,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:08,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:08,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:48:08,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-03 20:48:08,953 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 421 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:48:08,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 112 transitions, 861 flow [2024-06-03 20:48:08,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 112 transitions, 798 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:08,964 INFO L231 Difference]: Finished difference. Result has 71 places, 79 transitions, 548 flow [2024-06-03 20:48:08,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=548, PETRI_PLACES=71, PETRI_TRANSITIONS=79} [2024-06-03 20:48:08,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-03 20:48:08,965 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 79 transitions, 548 flow [2024-06-03 20:48:08,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:08,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:08,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:08,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:48:08,966 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:08,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:08,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1121303404, now seen corresponding path program 2 times [2024-06-03 20:48:08,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:08,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724107646] [2024-06-03 20:48:08,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:08,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:09,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:09,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724107646] [2024-06-03 20:48:09,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724107646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:09,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:09,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:09,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911407212] [2024-06-03 20:48:09,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:09,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:09,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:09,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:09,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:09,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:09,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 79 transitions, 548 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:09,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:09,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:09,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:09,427 INFO L124 PetriNetUnfolderBase]: 1180/1933 cut-off events. [2024-06-03 20:48:09,427 INFO L125 PetriNetUnfolderBase]: For 10534/10540 co-relation queries the response was YES. [2024-06-03 20:48:09,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8332 conditions, 1933 events. 1180/1933 cut-off events. For 10534/10540 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10033 event pairs, 310 based on Foata normal form. 5/1932 useless extension candidates. Maximal degree in co-relation 8301. Up to 1270 conditions per place. [2024-06-03 20:48:09,439 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 77 selfloop transitions, 57 changer transitions 0/140 dead transitions. [2024-06-03 20:48:09,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 140 transitions, 1212 flow [2024-06-03 20:48:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:09,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 20:48:09,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-03 20:48:09,440 INFO L175 Difference]: Start difference. First operand has 71 places, 79 transitions, 548 flow. Second operand 8 states and 199 transitions. [2024-06-03 20:48:09,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 140 transitions, 1212 flow [2024-06-03 20:48:09,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 140 transitions, 1143 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:09,459 INFO L231 Difference]: Finished difference. Result has 79 places, 102 transitions, 858 flow [2024-06-03 20:48:09,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=858, PETRI_PLACES=79, PETRI_TRANSITIONS=102} [2024-06-03 20:48:09,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-03 20:48:09,460 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 102 transitions, 858 flow [2024-06-03 20:48:09,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:09,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:09,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:09,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:48:09,460 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)] === [2024-06-03 20:48:09,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:09,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1660638336, now seen corresponding path program 3 times [2024-06-03 20:48:09,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:09,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615841723] [2024-06-03 20:48:09,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:09,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:09,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:09,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615841723] [2024-06-03 20:48:09,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615841723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:09,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:09,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:09,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842165946] [2024-06-03 20:48:09,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:09,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:09,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:09,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:09,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:09,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:09,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 102 transitions, 858 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:09,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:09,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:09,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:09,948 INFO L124 PetriNetUnfolderBase]: 1212/1983 cut-off events. [2024-06-03 20:48:09,949 INFO L125 PetriNetUnfolderBase]: For 14427/14433 co-relation queries the response was YES. [2024-06-03 20:48:09,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9935 conditions, 1983 events. 1212/1983 cut-off events. For 14427/14433 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10325 event pairs, 312 based on Foata normal form. 6/1983 useless extension candidates. Maximal degree in co-relation 9899. Up to 1286 conditions per place. [2024-06-03 20:48:09,962 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 83 selfloop transitions, 65 changer transitions 0/154 dead transitions. [2024-06-03 20:48:09,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 154 transitions, 1478 flow [2024-06-03 20:48:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-03 20:48:09,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-03 20:48:09,964 INFO L175 Difference]: Start difference. First operand has 79 places, 102 transitions, 858 flow. Second operand 9 states and 221 transitions. [2024-06-03 20:48:09,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 154 transitions, 1478 flow [2024-06-03 20:48:09,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 154 transitions, 1383 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:09,989 INFO L231 Difference]: Finished difference. Result has 87 places, 114 transitions, 1071 flow [2024-06-03 20:48:09,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1071, PETRI_PLACES=87, PETRI_TRANSITIONS=114} [2024-06-03 20:48:09,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-03 20:48:09,990 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 114 transitions, 1071 flow [2024-06-03 20:48:09,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:09,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:09,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:09,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:48:09,991 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)] === [2024-06-03 20:48:09,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1619995816, now seen corresponding path program 1 times [2024-06-03 20:48:09,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:09,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667665185] [2024-06-03 20:48:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:09,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:10,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:10,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667665185] [2024-06-03 20:48:10,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667665185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:10,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:10,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:10,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929734572] [2024-06-03 20:48:10,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:10,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:10,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:10,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:10,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:10,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:10,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 1071 flow. Second operand has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:10,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:10,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:10,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:10,466 INFO L124 PetriNetUnfolderBase]: 1215/1985 cut-off events. [2024-06-03 20:48:10,466 INFO L125 PetriNetUnfolderBase]: For 16030/16030 co-relation queries the response was YES. [2024-06-03 20:48:10,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10635 conditions, 1985 events. 1215/1985 cut-off events. For 16030/16030 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10273 event pairs, 291 based on Foata normal form. 6/1989 useless extension candidates. Maximal degree in co-relation 10596. Up to 1746 conditions per place. [2024-06-03 20:48:10,479 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 114 selfloop transitions, 21 changer transitions 0/141 dead transitions. [2024-06-03 20:48:10,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 141 transitions, 1483 flow [2024-06-03 20:48:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:10,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-03 20:48:10,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-03 20:48:10,480 INFO L175 Difference]: Start difference. First operand has 87 places, 114 transitions, 1071 flow. Second operand 8 states and 175 transitions. [2024-06-03 20:48:10,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 141 transitions, 1483 flow [2024-06-03 20:48:10,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 141 transitions, 1400 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:10,505 INFO L231 Difference]: Finished difference. Result has 91 places, 117 transitions, 1084 flow [2024-06-03 20:48:10,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1084, PETRI_PLACES=91, PETRI_TRANSITIONS=117} [2024-06-03 20:48:10,506 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-03 20:48:10,507 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 117 transitions, 1084 flow [2024-06-03 20:48:10,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.714285714285714) internal successors, (103), 7 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:10,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:10,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:10,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:48:10,508 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:10,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash -85413158, now seen corresponding path program 1 times [2024-06-03 20:48:10,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:10,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352245766] [2024-06-03 20:48:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:10,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:10,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:10,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:10,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352245766] [2024-06-03 20:48:10,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352245766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:10,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:10,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:10,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365875717] [2024-06-03 20:48:10,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:10,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:10,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:10,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:10,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:10,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:10,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 117 transitions, 1084 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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) [2024-06-03 20:48:10,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:10,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:10,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:10,885 INFO L124 PetriNetUnfolderBase]: 1212/1980 cut-off events. [2024-06-03 20:48:10,886 INFO L125 PetriNetUnfolderBase]: For 17217/17217 co-relation queries the response was YES. [2024-06-03 20:48:10,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10649 conditions, 1980 events. 1212/1980 cut-off events. For 17217/17217 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10224 event pairs, 314 based on Foata normal form. 1/1979 useless extension candidates. Maximal degree in co-relation 10609. Up to 1802 conditions per place. [2024-06-03 20:48:10,900 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 112 selfloop transitions, 7 changer transitions 0/125 dead transitions. [2024-06-03 20:48:10,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 125 transitions, 1342 flow [2024-06-03 20:48:10,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:48:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:48:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-03 20:48:10,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:48:10,901 INFO L175 Difference]: Start difference. First operand has 91 places, 117 transitions, 1084 flow. Second operand 4 states and 92 transitions. [2024-06-03 20:48:10,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 125 transitions, 1342 flow [2024-06-03 20:48:10,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 125 transitions, 1260 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:10,970 INFO L231 Difference]: Finished difference. Result has 89 places, 117 transitions, 1022 flow [2024-06-03 20:48:10,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1022, PETRI_PLACES=89, PETRI_TRANSITIONS=117} [2024-06-03 20:48:10,971 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-03 20:48:10,972 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 117 transitions, 1022 flow [2024-06-03 20:48:10,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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) [2024-06-03 20:48:10,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:10,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:10,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:48:10,972 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)] === [2024-06-03 20:48:10,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:10,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1112802690, now seen corresponding path program 1 times [2024-06-03 20:48:10,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:10,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918596484] [2024-06-03 20:48:10,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:10,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:11,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:11,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918596484] [2024-06-03 20:48:11,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918596484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:11,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:11,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:11,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807997277] [2024-06-03 20:48:11,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:11,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:11,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:11,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:11,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:11,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:11,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 117 transitions, 1022 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) [2024-06-03 20:48:11,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:11,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:11,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:11,406 INFO L124 PetriNetUnfolderBase]: 1308/2143 cut-off events. [2024-06-03 20:48:11,407 INFO L125 PetriNetUnfolderBase]: For 20437/20441 co-relation queries the response was YES. [2024-06-03 20:48:11,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11474 conditions, 2143 events. 1308/2143 cut-off events. For 20437/20441 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 11273 event pairs, 286 based on Foata normal form. 9/2150 useless extension candidates. Maximal degree in co-relation 11433. Up to 1370 conditions per place. [2024-06-03 20:48:11,425 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 94 selfloop transitions, 89 changer transitions 0/189 dead transitions. [2024-06-03 20:48:11,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 189 transitions, 1956 flow [2024-06-03 20:48:11,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:11,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:11,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-03 20:48:11,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151761517615176 [2024-06-03 20:48:11,426 INFO L175 Difference]: Start difference. First operand has 89 places, 117 transitions, 1022 flow. Second operand 9 states and 227 transitions. [2024-06-03 20:48:11,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 189 transitions, 1956 flow [2024-06-03 20:48:11,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 189 transitions, 1942 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:11,458 INFO L231 Difference]: Finished difference. Result has 98 places, 144 transitions, 1618 flow [2024-06-03 20:48:11,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1618, PETRI_PLACES=98, PETRI_TRANSITIONS=144} [2024-06-03 20:48:11,459 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-03 20:48:11,459 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 144 transitions, 1618 flow [2024-06-03 20:48:11,459 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) [2024-06-03 20:48:11,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:11,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:11,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:48:11,460 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:11,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:11,460 INFO L85 PathProgramCache]: Analyzing trace with hash 1112808270, now seen corresponding path program 2 times [2024-06-03 20:48:11,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:11,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913389445] [2024-06-03 20:48:11,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:11,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:11,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:11,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913389445] [2024-06-03 20:48:11,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913389445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:11,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:11,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:11,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430080254] [2024-06-03 20:48:11,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:11,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:11,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:11,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:11,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:11,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:11,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 144 transitions, 1618 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) [2024-06-03 20:48:11,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:11,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:11,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:11,999 INFO L124 PetriNetUnfolderBase]: 1324/2174 cut-off events. [2024-06-03 20:48:11,999 INFO L125 PetriNetUnfolderBase]: For 25590/25594 co-relation queries the response was YES. [2024-06-03 20:48:12,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13130 conditions, 2174 events. 1324/2174 cut-off events. For 25590/25594 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11486 event pairs, 285 based on Foata normal form. 9/2181 useless extension candidates. Maximal degree in co-relation 13085. Up to 1387 conditions per place. [2024-06-03 20:48:12,019 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 93 selfloop transitions, 92 changer transitions 0/191 dead transitions. [2024-06-03 20:48:12,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 191 transitions, 2383 flow [2024-06-03 20:48:12,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-03 20:48:12,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-03 20:48:12,020 INFO L175 Difference]: Start difference. First operand has 98 places, 144 transitions, 1618 flow. Second operand 8 states and 202 transitions. [2024-06-03 20:48:12,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 191 transitions, 2383 flow [2024-06-03 20:48:12,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 191 transitions, 2280 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:12,070 INFO L231 Difference]: Finished difference. Result has 104 places, 154 transitions, 1903 flow [2024-06-03 20:48:12,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1903, PETRI_PLACES=104, PETRI_TRANSITIONS=154} [2024-06-03 20:48:12,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-03 20:48:12,071 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 154 transitions, 1903 flow [2024-06-03 20:48:12,072 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) [2024-06-03 20:48:12,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:12,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:12,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:48:12,072 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)] === [2024-06-03 20:48:12,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:12,073 INFO L85 PathProgramCache]: Analyzing trace with hash -400665934, now seen corresponding path program 3 times [2024-06-03 20:48:12,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:12,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476643924] [2024-06-03 20:48:12,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:12,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:12,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:12,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:12,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476643924] [2024-06-03 20:48:12,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476643924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:12,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:12,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:12,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097029994] [2024-06-03 20:48:12,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:12,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:12,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:12,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:12,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:12,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 154 transitions, 1903 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) [2024-06-03 20:48:12,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:12,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:12,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:12,600 INFO L124 PetriNetUnfolderBase]: 1341/2214 cut-off events. [2024-06-03 20:48:12,600 INFO L125 PetriNetUnfolderBase]: For 29167/29177 co-relation queries the response was YES. [2024-06-03 20:48:12,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14084 conditions, 2214 events. 1341/2214 cut-off events. For 29167/29177 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11877 event pairs, 329 based on Foata normal form. 9/2219 useless extension candidates. Maximal degree in co-relation 14036. Up to 1407 conditions per place. [2024-06-03 20:48:12,616 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 97 selfloop transitions, 82 changer transitions 0/185 dead transitions. [2024-06-03 20:48:12,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 185 transitions, 2507 flow [2024-06-03 20:48:12,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:12,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:12,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:48:12,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:48:12,618 INFO L175 Difference]: Start difference. First operand has 104 places, 154 transitions, 1903 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:48:12,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 185 transitions, 2507 flow [2024-06-03 20:48:12,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 185 transitions, 2363 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:12,666 INFO L231 Difference]: Finished difference. Result has 108 places, 163 transitions, 2111 flow [2024-06-03 20:48:12,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2111, PETRI_PLACES=108, PETRI_TRANSITIONS=163} [2024-06-03 20:48:12,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-03 20:48:12,667 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 163 transitions, 2111 flow [2024-06-03 20:48:12,667 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) [2024-06-03 20:48:12,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:12,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:12,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:48:12,667 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:12,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:12,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1610518182, now seen corresponding path program 1 times [2024-06-03 20:48:12,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:12,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329384538] [2024-06-03 20:48:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:12,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:12,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:12,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329384538] [2024-06-03 20:48:12,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329384538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:12,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:12,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:12,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981947080] [2024-06-03 20:48:12,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:12,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:12,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:12,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:12,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:12,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:12,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 163 transitions, 2111 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:12,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:12,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:12,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:13,071 INFO L124 PetriNetUnfolderBase]: 1337/2210 cut-off events. [2024-06-03 20:48:13,072 INFO L125 PetriNetUnfolderBase]: For 31893/31901 co-relation queries the response was YES. [2024-06-03 20:48:13,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14469 conditions, 2210 events. 1337/2210 cut-off events. For 31893/31901 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 11825 event pairs, 313 based on Foata normal form. 8/2215 useless extension candidates. Maximal degree in co-relation 14419. Up to 1941 conditions per place. [2024-06-03 20:48:13,090 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 153 selfloop transitions, 18 changer transitions 0/177 dead transitions. [2024-06-03 20:48:13,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 177 transitions, 2585 flow [2024-06-03 20:48:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:48:13,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:48:13,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-03 20:48:13,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-03 20:48:13,092 INFO L175 Difference]: Start difference. First operand has 108 places, 163 transitions, 2111 flow. Second operand 5 states and 114 transitions. [2024-06-03 20:48:13,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 177 transitions, 2585 flow [2024-06-03 20:48:13,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 177 transitions, 2459 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:13,143 INFO L231 Difference]: Finished difference. Result has 111 places, 167 transitions, 2123 flow [2024-06-03 20:48:13,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1986, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2123, PETRI_PLACES=111, PETRI_TRANSITIONS=167} [2024-06-03 20:48:13,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-03 20:48:13,144 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 167 transitions, 2123 flow [2024-06-03 20:48:13,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:13,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:13,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:13,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:48:13,145 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)] === [2024-06-03 20:48:13,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:13,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1731486651, now seen corresponding path program 1 times [2024-06-03 20:48:13,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:13,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817651480] [2024-06-03 20:48:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:13,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:13,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:13,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:13,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817651480] [2024-06-03 20:48:13,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817651480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:13,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:13,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:13,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824171155] [2024-06-03 20:48:13,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:13,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:13,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:13,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:13,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:13,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:13,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 167 transitions, 2123 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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) [2024-06-03 20:48:13,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:13,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:13,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:13,631 INFO L124 PetriNetUnfolderBase]: 1354/2234 cut-off events. [2024-06-03 20:48:13,631 INFO L125 PetriNetUnfolderBase]: For 34041/34045 co-relation queries the response was YES. [2024-06-03 20:48:13,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14330 conditions, 2234 events. 1354/2234 cut-off events. For 34041/34045 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 11956 event pairs, 206 based on Foata normal form. 8/2240 useless extension candidates. Maximal degree in co-relation 14278. Up to 1833 conditions per place. [2024-06-03 20:48:13,651 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 169 selfloop transitions, 22 changer transitions 0/197 dead transitions. [2024-06-03 20:48:13,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 197 transitions, 2709 flow [2024-06-03 20:48:13,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:13,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:48:13,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-03 20:48:13,652 INFO L175 Difference]: Start difference. First operand has 111 places, 167 transitions, 2123 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:48:13,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 197 transitions, 2709 flow [2024-06-03 20:48:13,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 197 transitions, 2655 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-03 20:48:13,717 INFO L231 Difference]: Finished difference. Result has 116 places, 171 transitions, 2200 flow [2024-06-03 20:48:13,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2200, PETRI_PLACES=116, PETRI_TRANSITIONS=171} [2024-06-03 20:48:13,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-03 20:48:13,720 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 171 transitions, 2200 flow [2024-06-03 20:48:13,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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) [2024-06-03 20:48:13,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:13,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:13,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:48:13,721 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)] === [2024-06-03 20:48:13,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:13,721 INFO L85 PathProgramCache]: Analyzing trace with hash 501397417, now seen corresponding path program 2 times [2024-06-03 20:48:13,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:13,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758573007] [2024-06-03 20:48:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:13,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:13,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:13,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:13,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:13,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758573007] [2024-06-03 20:48:13,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758573007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:13,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:13,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:13,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203438288] [2024-06-03 20:48:13,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:13,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:13,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:13,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:13,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:13,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:13,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 171 transitions, 2200 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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) [2024-06-03 20:48:13,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:13,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:13,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:14,177 INFO L124 PetriNetUnfolderBase]: 1346/2222 cut-off events. [2024-06-03 20:48:14,177 INFO L125 PetriNetUnfolderBase]: For 36288/36292 co-relation queries the response was YES. [2024-06-03 20:48:14,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14465 conditions, 2222 events. 1346/2222 cut-off events. For 36288/36292 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 11882 event pairs, 290 based on Foata normal form. 8/2228 useless extension candidates. Maximal degree in co-relation 14411. Up to 1898 conditions per place. [2024-06-03 20:48:14,197 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 168 selfloop transitions, 20 changer transitions 0/194 dead transitions. [2024-06-03 20:48:14,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 194 transitions, 2634 flow [2024-06-03 20:48:14,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:14,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:14,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 20:48:14,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-03 20:48:14,199 INFO L175 Difference]: Start difference. First operand has 116 places, 171 transitions, 2200 flow. Second operand 6 states and 143 transitions. [2024-06-03 20:48:14,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 194 transitions, 2634 flow [2024-06-03 20:48:14,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 194 transitions, 2507 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:14,262 INFO L231 Difference]: Finished difference. Result has 119 places, 171 transitions, 2120 flow [2024-06-03 20:48:14,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2073, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2120, PETRI_PLACES=119, PETRI_TRANSITIONS=171} [2024-06-03 20:48:14,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-03 20:48:14,263 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 171 transitions, 2120 flow [2024-06-03 20:48:14,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 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) [2024-06-03 20:48:14,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:14,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:14,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:48:14,263 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)] === [2024-06-03 20:48:14,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash 137326199, now seen corresponding path program 1 times [2024-06-03 20:48:14,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:14,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152186923] [2024-06-03 20:48:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:14,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:14,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:14,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:14,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152186923] [2024-06-03 20:48:14,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152186923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:14,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:14,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:14,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106440753] [2024-06-03 20:48:14,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:14,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:14,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:14,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:14,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:14,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:14,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 171 transitions, 2120 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:14,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:14,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:14,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:14,814 INFO L124 PetriNetUnfolderBase]: 1605/2662 cut-off events. [2024-06-03 20:48:14,814 INFO L125 PetriNetUnfolderBase]: For 52088/52092 co-relation queries the response was YES. [2024-06-03 20:48:14,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16156 conditions, 2662 events. 1605/2662 cut-off events. For 52088/52092 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 14972 event pairs, 323 based on Foata normal form. 72/2732 useless extension candidates. Maximal degree in co-relation 16100. Up to 1463 conditions per place. [2024-06-03 20:48:14,835 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 105 selfloop transitions, 107 changer transitions 0/218 dead transitions. [2024-06-03 20:48:14,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 218 transitions, 2830 flow [2024-06-03 20:48:14,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:14,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:14,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-03 20:48:14,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6024390243902439 [2024-06-03 20:48:14,837 INFO L175 Difference]: Start difference. First operand has 119 places, 171 transitions, 2120 flow. Second operand 10 states and 247 transitions. [2024-06-03 20:48:14,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 218 transitions, 2830 flow [2024-06-03 20:48:14,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 218 transitions, 2776 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:14,896 INFO L231 Difference]: Finished difference. Result has 125 places, 174 transitions, 2365 flow [2024-06-03 20:48:14,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2066, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2365, PETRI_PLACES=125, PETRI_TRANSITIONS=174} [2024-06-03 20:48:14,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-03 20:48:14,897 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 174 transitions, 2365 flow [2024-06-03 20:48:14,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:14,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:14,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:14,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:48:14,898 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:14,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:14,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1557400975, now seen corresponding path program 1 times [2024-06-03 20:48:14,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:14,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380103511] [2024-06-03 20:48:14,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:14,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:15,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:15,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380103511] [2024-06-03 20:48:15,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380103511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:15,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:15,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:15,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441293827] [2024-06-03 20:48:15,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:15,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:15,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:15,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:15,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:15,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:15,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 174 transitions, 2365 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:15,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:15,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:15,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:15,388 INFO L124 PetriNetUnfolderBase]: 1602/2660 cut-off events. [2024-06-03 20:48:15,389 INFO L125 PetriNetUnfolderBase]: For 46858/46858 co-relation queries the response was YES. [2024-06-03 20:48:15,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17250 conditions, 2660 events. 1602/2660 cut-off events. For 46858/46858 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 14930 event pairs, 347 based on Foata normal form. 1/2659 useless extension candidates. Maximal degree in co-relation 17192. Up to 2395 conditions per place. [2024-06-03 20:48:15,408 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 167 selfloop transitions, 20 changer transitions 0/193 dead transitions. [2024-06-03 20:48:15,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 193 transitions, 2838 flow [2024-06-03 20:48:15,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:15,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:15,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-03 20:48:15,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-03 20:48:15,411 INFO L175 Difference]: Start difference. First operand has 125 places, 174 transitions, 2365 flow. Second operand 7 states and 153 transitions. [2024-06-03 20:48:15,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 193 transitions, 2838 flow [2024-06-03 20:48:15,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 193 transitions, 2608 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-03 20:48:15,478 INFO L231 Difference]: Finished difference. Result has 123 places, 175 transitions, 2194 flow [2024-06-03 20:48:15,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2136, PETRI_DIFFERENCE_MINUEND_PLACES=116, 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=7, PETRI_FLOW=2194, PETRI_PLACES=123, PETRI_TRANSITIONS=175} [2024-06-03 20:48:15,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-03 20:48:15,479 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 175 transitions, 2194 flow [2024-06-03 20:48:15,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:15,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:15,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:15,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:48:15,480 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)] === [2024-06-03 20:48:15,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:15,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1813118121, now seen corresponding path program 2 times [2024-06-03 20:48:15,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:15,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320438341] [2024-06-03 20:48:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:15,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:15,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:15,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:15,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320438341] [2024-06-03 20:48:15,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320438341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:15,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:15,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:15,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938205634] [2024-06-03 20:48:15,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:15,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:15,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:15,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:15,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:15,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:15,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 175 transitions, 2194 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:15,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:15,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:15,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:16,018 INFO L124 PetriNetUnfolderBase]: 1668/2757 cut-off events. [2024-06-03 20:48:16,018 INFO L125 PetriNetUnfolderBase]: For 50499/50505 co-relation queries the response was YES. [2024-06-03 20:48:16,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16761 conditions, 2757 events. 1668/2757 cut-off events. For 50499/50505 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 15502 event pairs, 353 based on Foata normal form. 15/2767 useless extension candidates. Maximal degree in co-relation 16705. Up to 1902 conditions per place. [2024-06-03 20:48:16,041 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 107 selfloop transitions, 100 changer transitions 0/213 dead transitions. [2024-06-03 20:48:16,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 213 transitions, 2890 flow [2024-06-03 20:48:16,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:16,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:16,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-03 20:48:16,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-03 20:48:16,042 INFO L175 Difference]: Start difference. First operand has 123 places, 175 transitions, 2194 flow. Second operand 9 states and 221 transitions. [2024-06-03 20:48:16,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 213 transitions, 2890 flow [2024-06-03 20:48:16,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 213 transitions, 2721 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:16,108 INFO L231 Difference]: Finished difference. Result has 125 places, 178 transitions, 2298 flow [2024-06-03 20:48:16,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2298, PETRI_PLACES=125, PETRI_TRANSITIONS=178} [2024-06-03 20:48:16,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-03 20:48:16,109 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 178 transitions, 2298 flow [2024-06-03 20:48:16,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:16,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:16,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:16,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:48:16,110 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)] === [2024-06-03 20:48:16,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:16,110 INFO L85 PathProgramCache]: Analyzing trace with hash 785308929, now seen corresponding path program 3 times [2024-06-03 20:48:16,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:16,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543715004] [2024-06-03 20:48:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:16,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:16,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:16,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:16,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543715004] [2024-06-03 20:48:16,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543715004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:16,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:16,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:16,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643946881] [2024-06-03 20:48:16,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:16,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:16,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:16,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:16,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:16,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 178 transitions, 2298 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:16,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:16,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:16,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:16,648 INFO L124 PetriNetUnfolderBase]: 1734/2863 cut-off events. [2024-06-03 20:48:16,649 INFO L125 PetriNetUnfolderBase]: For 55378/55384 co-relation queries the response was YES. [2024-06-03 20:48:16,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18107 conditions, 2863 events. 1734/2863 cut-off events. For 55378/55384 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16185 event pairs, 364 based on Foata normal form. 15/2873 useless extension candidates. Maximal degree in co-relation 18050. Up to 2005 conditions per place. [2024-06-03 20:48:16,672 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 117 selfloop transitions, 100 changer transitions 0/223 dead transitions. [2024-06-03 20:48:16,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 223 transitions, 3044 flow [2024-06-03 20:48:16,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:16,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:16,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-03 20:48:16,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-03 20:48:16,674 INFO L175 Difference]: Start difference. First operand has 125 places, 178 transitions, 2298 flow. Second operand 10 states and 244 transitions. [2024-06-03 20:48:16,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 223 transitions, 3044 flow [2024-06-03 20:48:16,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 223 transitions, 2803 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:16,745 INFO L231 Difference]: Finished difference. Result has 128 places, 181 transitions, 2337 flow [2024-06-03 20:48:16,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2337, PETRI_PLACES=128, PETRI_TRANSITIONS=181} [2024-06-03 20:48:16,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-03 20:48:16,745 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 181 transitions, 2337 flow [2024-06-03 20:48:16,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:16,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:16,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:16,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:48:16,746 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)] === [2024-06-03 20:48:16,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:16,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1812821451, now seen corresponding path program 4 times [2024-06-03 20:48:16,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:16,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451294069] [2024-06-03 20:48:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:16,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:16,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:16,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451294069] [2024-06-03 20:48:16,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451294069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:16,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:16,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:16,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16338843] [2024-06-03 20:48:16,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:16,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:16,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:16,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:16,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:16,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:16,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 181 transitions, 2337 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:16,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:16,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:16,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:17,361 INFO L124 PetriNetUnfolderBase]: 1994/3311 cut-off events. [2024-06-03 20:48:17,362 INFO L125 PetriNetUnfolderBase]: For 71704/71710 co-relation queries the response was YES. [2024-06-03 20:48:17,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20735 conditions, 3311 events. 1994/3311 cut-off events. For 71704/71710 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 19505 event pairs, 411 based on Foata normal form. 15/3321 useless extension candidates. Maximal degree in co-relation 20677. Up to 1450 conditions per place. [2024-06-03 20:48:17,389 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 115 selfloop transitions, 107 changer transitions 0/228 dead transitions. [2024-06-03 20:48:17,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 228 transitions, 3193 flow [2024-06-03 20:48:17,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:17,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-03 20:48:17,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6151761517615176 [2024-06-03 20:48:17,391 INFO L175 Difference]: Start difference. First operand has 128 places, 181 transitions, 2337 flow. Second operand 9 states and 227 transitions. [2024-06-03 20:48:17,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 228 transitions, 3193 flow [2024-06-03 20:48:17,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 228 transitions, 2947 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:17,470 INFO L231 Difference]: Finished difference. Result has 130 places, 186 transitions, 2447 flow [2024-06-03 20:48:17,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2447, PETRI_PLACES=130, PETRI_TRANSITIONS=186} [2024-06-03 20:48:17,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-03 20:48:17,471 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 186 transitions, 2447 flow [2024-06-03 20:48:17,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:17,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:17,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:17,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:48:17,472 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:17,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1613556053, now seen corresponding path program 2 times [2024-06-03 20:48:17,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:17,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861479148] [2024-06-03 20:48:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:17,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:17,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:17,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:17,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861479148] [2024-06-03 20:48:17,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861479148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:17,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:17,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:48:17,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975785515] [2024-06-03 20:48:17,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:17,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:48:17,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:17,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:48:17,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:48:17,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:17,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 186 transitions, 2447 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:17,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:17,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:17,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:18,010 INFO L124 PetriNetUnfolderBase]: 1986/3305 cut-off events. [2024-06-03 20:48:18,010 INFO L125 PetriNetUnfolderBase]: For 72776/72784 co-relation queries the response was YES. [2024-06-03 20:48:18,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21137 conditions, 3305 events. 1986/3305 cut-off events. For 72776/72784 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19412 event pairs, 530 based on Foata normal form. 8/3310 useless extension candidates. Maximal degree in co-relation 21077. Up to 3011 conditions per place. [2024-06-03 20:48:18,038 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 171 selfloop transitions, 18 changer transitions 0/195 dead transitions. [2024-06-03 20:48:18,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 195 transitions, 2847 flow [2024-06-03 20:48:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:48:18,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:48:18,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-03 20:48:18,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-03 20:48:18,039 INFO L175 Difference]: Start difference. First operand has 130 places, 186 transitions, 2447 flow. Second operand 5 states and 113 transitions. [2024-06-03 20:48:18,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 195 transitions, 2847 flow [2024-06-03 20:48:18,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 195 transitions, 2629 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:18,130 INFO L231 Difference]: Finished difference. Result has 130 places, 186 transitions, 2273 flow [2024-06-03 20:48:18,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2229, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2273, PETRI_PLACES=130, PETRI_TRANSITIONS=186} [2024-06-03 20:48:18,131 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-03 20:48:18,131 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 186 transitions, 2273 flow [2024-06-03 20:48:18,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:18,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:18,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:18,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:48:18,132 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)] === [2024-06-03 20:48:18,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:18,133 INFO L85 PathProgramCache]: Analyzing trace with hash -477826661, now seen corresponding path program 1 times [2024-06-03 20:48:18,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:18,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730998951] [2024-06-03 20:48:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:18,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:18,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:18,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:18,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730998951] [2024-06-03 20:48:18,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730998951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:18,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:18,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:18,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690062414] [2024-06-03 20:48:18,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:18,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:18,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:18,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:18,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:18,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:18,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 186 transitions, 2273 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 20:48:18,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:18,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:18,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:18,740 INFO L124 PetriNetUnfolderBase]: 1988/3306 cut-off events. [2024-06-03 20:48:18,741 INFO L125 PetriNetUnfolderBase]: For 72686/72686 co-relation queries the response was YES. [2024-06-03 20:48:18,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20678 conditions, 3306 events. 1988/3306 cut-off events. For 72686/72686 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 19471 event pairs, 517 based on Foata normal form. 2/3306 useless extension candidates. Maximal degree in co-relation 20616. Up to 3012 conditions per place. [2024-06-03 20:48:18,768 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 181 selfloop transitions, 20 changer transitions 0/207 dead transitions. [2024-06-03 20:48:18,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 207 transitions, 2806 flow [2024-06-03 20:48:18,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:18,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-03 20:48:18,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5331010452961672 [2024-06-03 20:48:18,770 INFO L175 Difference]: Start difference. First operand has 130 places, 186 transitions, 2273 flow. Second operand 7 states and 153 transitions. [2024-06-03 20:48:18,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 207 transitions, 2806 flow [2024-06-03 20:48:18,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 207 transitions, 2770 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:18,877 INFO L231 Difference]: Finished difference. Result has 133 places, 189 transitions, 2322 flow [2024-06-03 20:48:18,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2237, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2322, PETRI_PLACES=133, PETRI_TRANSITIONS=189} [2024-06-03 20:48:18,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-03 20:48:18,878 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 189 transitions, 2322 flow [2024-06-03 20:48:18,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 20:48:18,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:18,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:18,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:48:18,878 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:18,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:18,879 INFO L85 PathProgramCache]: Analyzing trace with hash -477619271, now seen corresponding path program 2 times [2024-06-03 20:48:18,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:18,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018912113] [2024-06-03 20:48:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:18,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:19,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:19,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018912113] [2024-06-03 20:48:19,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018912113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:19,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:19,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:19,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933767871] [2024-06-03 20:48:19,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:19,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:19,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:19,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:19,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:19,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:19,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 189 transitions, 2322 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 20:48:19,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:19,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:19,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:19,407 INFO L124 PetriNetUnfolderBase]: 1970/3277 cut-off events. [2024-06-03 20:48:19,408 INFO L125 PetriNetUnfolderBase]: For 76399/76403 co-relation queries the response was YES. [2024-06-03 20:48:19,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20682 conditions, 3277 events. 1970/3277 cut-off events. For 76399/76403 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19269 event pairs, 520 based on Foata normal form. 5/3280 useless extension candidates. Maximal degree in co-relation 20619. Up to 2986 conditions per place. [2024-06-03 20:48:19,432 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 176 selfloop transitions, 20 changer transitions 0/202 dead transitions. [2024-06-03 20:48:19,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 202 transitions, 2746 flow [2024-06-03 20:48:19,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:19,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-03 20:48:19,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-03 20:48:19,434 INFO L175 Difference]: Start difference. First operand has 133 places, 189 transitions, 2322 flow. Second operand 6 states and 133 transitions. [2024-06-03 20:48:19,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 202 transitions, 2746 flow [2024-06-03 20:48:19,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 202 transitions, 2713 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:19,521 INFO L231 Difference]: Finished difference. Result has 135 places, 189 transitions, 2335 flow [2024-06-03 20:48:19,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2335, PETRI_PLACES=135, PETRI_TRANSITIONS=189} [2024-06-03 20:48:19,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-03 20:48:19,521 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 189 transitions, 2335 flow [2024-06-03 20:48:19,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-03 20:48:19,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:19,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:19,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:48:19,522 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)] === [2024-06-03 20:48:19,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:19,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1881980671, now seen corresponding path program 1 times [2024-06-03 20:48:19,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:19,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459589694] [2024-06-03 20:48:19,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:19,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:19,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:19,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:19,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459589694] [2024-06-03 20:48:19,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459589694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:19,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:19,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:19,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191089952] [2024-06-03 20:48:19,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:19,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:19,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:19,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:19,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:19,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:19,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 189 transitions, 2335 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:19,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:19,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:19,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:20,288 INFO L124 PetriNetUnfolderBase]: 2658/4410 cut-off events. [2024-06-03 20:48:20,288 INFO L125 PetriNetUnfolderBase]: For 142128/142132 co-relation queries the response was YES. [2024-06-03 20:48:20,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28482 conditions, 4410 events. 2658/4410 cut-off events. For 142128/142132 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27714 event pairs, 438 based on Foata normal form. 52/4440 useless extension candidates. Maximal degree in co-relation 28418. Up to 1627 conditions per place. [2024-06-03 20:48:20,320 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 147 selfloop transitions, 104 changer transitions 0/257 dead transitions. [2024-06-03 20:48:20,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 257 transitions, 3511 flow [2024-06-03 20:48:20,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:20,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:20,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 239 transitions. [2024-06-03 20:48:20,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476964769647696 [2024-06-03 20:48:20,322 INFO L175 Difference]: Start difference. First operand has 135 places, 189 transitions, 2335 flow. Second operand 9 states and 239 transitions. [2024-06-03 20:48:20,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 257 transitions, 3511 flow [2024-06-03 20:48:20,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 257 transitions, 3454 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:20,525 INFO L231 Difference]: Finished difference. Result has 140 places, 197 transitions, 2726 flow [2024-06-03 20:48:20,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2726, PETRI_PLACES=140, PETRI_TRANSITIONS=197} [2024-06-03 20:48:20,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-03 20:48:20,526 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 197 transitions, 2726 flow [2024-06-03 20:48:20,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:20,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:20,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:20,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:48:20,526 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)] === [2024-06-03 20:48:20,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1636547849, now seen corresponding path program 2 times [2024-06-03 20:48:20,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:20,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070882747] [2024-06-03 20:48:20,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:20,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:20,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:20,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070882747] [2024-06-03 20:48:20,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070882747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:20,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:20,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:20,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642655249] [2024-06-03 20:48:20,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:20,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:20,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:20,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:20,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:20,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:20,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 197 transitions, 2726 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:20,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:20,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:20,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:21,320 INFO L124 PetriNetUnfolderBase]: 2974/4974 cut-off events. [2024-06-03 20:48:21,320 INFO L125 PetriNetUnfolderBase]: For 170585/170589 co-relation queries the response was YES. [2024-06-03 20:48:21,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33476 conditions, 4974 events. 2974/4974 cut-off events. For 170585/170589 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 32389 event pairs, 769 based on Foata normal form. 52/5010 useless extension candidates. Maximal degree in co-relation 33409. Up to 3181 conditions per place. [2024-06-03 20:48:21,366 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 140 selfloop transitions, 111 changer transitions 0/257 dead transitions. [2024-06-03 20:48:21,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 257 transitions, 3764 flow [2024-06-03 20:48:21,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:21,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-03 20:48:21,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-03 20:48:21,368 INFO L175 Difference]: Start difference. First operand has 140 places, 197 transitions, 2726 flow. Second operand 10 states and 255 transitions. [2024-06-03 20:48:21,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 257 transitions, 3764 flow [2024-06-03 20:48:21,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 257 transitions, 3496 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:21,635 INFO L231 Difference]: Finished difference. Result has 146 places, 203 transitions, 2862 flow [2024-06-03 20:48:21,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2462, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2862, PETRI_PLACES=146, PETRI_TRANSITIONS=203} [2024-06-03 20:48:21,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-03 20:48:21,636 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 203 transitions, 2862 flow [2024-06-03 20:48:21,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:21,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:21,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:21,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:48:21,637 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:21,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:21,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1164809681, now seen corresponding path program 1 times [2024-06-03 20:48:21,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:21,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470653771] [2024-06-03 20:48:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:21,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:21,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:21,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:21,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470653771] [2024-06-03 20:48:21,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470653771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:21,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:21,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:21,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568739881] [2024-06-03 20:48:21,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:21,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:21,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:21,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:21,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:21,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:21,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 203 transitions, 2862 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:21,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:21,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:21,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:22,426 INFO L124 PetriNetUnfolderBase]: 2994/5024 cut-off events. [2024-06-03 20:48:22,426 INFO L125 PetriNetUnfolderBase]: For 161376/161380 co-relation queries the response was YES. [2024-06-03 20:48:22,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33968 conditions, 5024 events. 2994/5024 cut-off events. For 161376/161380 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 32842 event pairs, 911 based on Foata normal form. 8/5030 useless extension candidates. Maximal degree in co-relation 33899. Up to 4108 conditions per place. [2024-06-03 20:48:22,470 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 125 selfloop transitions, 117 changer transitions 0/248 dead transitions. [2024-06-03 20:48:22,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 248 transitions, 3764 flow [2024-06-03 20:48:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:22,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:22,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-03 20:48:22,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-03 20:48:22,472 INFO L175 Difference]: Start difference. First operand has 146 places, 203 transitions, 2862 flow. Second operand 9 states and 222 transitions. [2024-06-03 20:48:22,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 248 transitions, 3764 flow [2024-06-03 20:48:22,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 248 transitions, 3526 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:22,714 INFO L231 Difference]: Finished difference. Result has 149 places, 211 transitions, 3020 flow [2024-06-03 20:48:22,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3020, PETRI_PLACES=149, PETRI_TRANSITIONS=211} [2024-06-03 20:48:22,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-03 20:48:22,715 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 211 transitions, 3020 flow [2024-06-03 20:48:22,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:22,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:22,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:48:22,715 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)] === [2024-06-03 20:48:22,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash -441786471, now seen corresponding path program 3 times [2024-06-03 20:48:22,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:22,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258596099] [2024-06-03 20:48:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:22,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:22,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:22,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258596099] [2024-06-03 20:48:22,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258596099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:22,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:22,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:22,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819699386] [2024-06-03 20:48:22,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:22,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:22,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:22,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:22,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:22,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:22,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 211 transitions, 3020 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:22,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:22,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:22,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:23,638 INFO L124 PetriNetUnfolderBase]: 3426/5818 cut-off events. [2024-06-03 20:48:23,639 INFO L125 PetriNetUnfolderBase]: For 212009/212013 co-relation queries the response was YES. [2024-06-03 20:48:23,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38903 conditions, 5818 events. 3426/5818 cut-off events. For 212009/212013 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 39863 event pairs, 909 based on Foata normal form. 46/5862 useless extension candidates. Maximal degree in co-relation 38832. Up to 3831 conditions per place. [2024-06-03 20:48:23,688 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 149 selfloop transitions, 120 changer transitions 0/275 dead transitions. [2024-06-03 20:48:23,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 275 transitions, 4180 flow [2024-06-03 20:48:23,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:23,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-03 20:48:23,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-03 20:48:23,690 INFO L175 Difference]: Start difference. First operand has 149 places, 211 transitions, 3020 flow. Second operand 10 states and 258 transitions. [2024-06-03 20:48:23,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 275 transitions, 4180 flow [2024-06-03 20:48:23,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 275 transitions, 3981 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:23,986 INFO L231 Difference]: Finished difference. Result has 154 places, 216 transitions, 3228 flow [2024-06-03 20:48:23,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2821, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3228, PETRI_PLACES=154, PETRI_TRANSITIONS=216} [2024-06-03 20:48:23,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-03 20:48:23,986 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 216 transitions, 3228 flow [2024-06-03 20:48:23,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:23,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:23,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:23,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:48:23,987 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)] === [2024-06-03 20:48:23,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:23,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1809075283, now seen corresponding path program 4 times [2024-06-03 20:48:23,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:23,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147088849] [2024-06-03 20:48:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:23,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:24,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:24,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:24,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147088849] [2024-06-03 20:48:24,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147088849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:24,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:24,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:24,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175595949] [2024-06-03 20:48:24,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:24,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:24,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:24,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:24,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:24,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:24,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 216 transitions, 3228 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:24,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:24,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:24,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:24,983 INFO L124 PetriNetUnfolderBase]: 3623/6179 cut-off events. [2024-06-03 20:48:24,983 INFO L125 PetriNetUnfolderBase]: For 235114/235118 co-relation queries the response was YES. [2024-06-03 20:48:25,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41410 conditions, 6179 events. 3623/6179 cut-off events. For 235114/235118 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 43151 event pairs, 1199 based on Foata normal form. 54/6231 useless extension candidates. Maximal degree in co-relation 41337. Up to 4837 conditions per place. [2024-06-03 20:48:25,041 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 143 selfloop transitions, 111 changer transitions 0/260 dead transitions. [2024-06-03 20:48:25,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 260 transitions, 4050 flow [2024-06-03 20:48:25,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-03 20:48:25,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:48:25,043 INFO L175 Difference]: Start difference. First operand has 154 places, 216 transitions, 3228 flow. Second operand 9 states and 225 transitions. [2024-06-03 20:48:25,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 260 transitions, 4050 flow [2024-06-03 20:48:25,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 260 transitions, 3816 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:25,308 INFO L231 Difference]: Finished difference. Result has 157 places, 218 transitions, 3301 flow [2024-06-03 20:48:25,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2996, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3301, PETRI_PLACES=157, PETRI_TRANSITIONS=218} [2024-06-03 20:48:25,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-03 20:48:25,308 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 218 transitions, 3301 flow [2024-06-03 20:48:25,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:25,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:25,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:25,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:48:25,309 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)] === [2024-06-03 20:48:25,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:25,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1814437663, now seen corresponding path program 5 times [2024-06-03 20:48:25,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:25,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644559464] [2024-06-03 20:48:25,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:25,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:25,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:25,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:25,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:25,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644559464] [2024-06-03 20:48:25,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644559464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:25,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:25,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:25,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076135007] [2024-06-03 20:48:25,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:25,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:25,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:25,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:25,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:25,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:25,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 218 transitions, 3301 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:25,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:25,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:25,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:26,355 INFO L124 PetriNetUnfolderBase]: 3820/6498 cut-off events. [2024-06-03 20:48:26,355 INFO L125 PetriNetUnfolderBase]: For 251804/251808 co-relation queries the response was YES. [2024-06-03 20:48:26,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43316 conditions, 6498 events. 3820/6498 cut-off events. For 251804/251808 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45711 event pairs, 1284 based on Foata normal form. 54/6550 useless extension candidates. Maximal degree in co-relation 43241. Up to 5176 conditions per place. [2024-06-03 20:48:26,407 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 146 selfloop transitions, 118 changer transitions 0/270 dead transitions. [2024-06-03 20:48:26,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 270 transitions, 4235 flow [2024-06-03 20:48:26,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:26,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-03 20:48:26,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6121951219512195 [2024-06-03 20:48:26,408 INFO L175 Difference]: Start difference. First operand has 157 places, 218 transitions, 3301 flow. Second operand 10 states and 251 transitions. [2024-06-03 20:48:26,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 270 transitions, 4235 flow [2024-06-03 20:48:26,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 270 transitions, 3968 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:26,687 INFO L231 Difference]: Finished difference. Result has 160 places, 220 transitions, 3357 flow [2024-06-03 20:48:26,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3034, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3357, PETRI_PLACES=160, PETRI_TRANSITIONS=220} [2024-06-03 20:48:26,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-03 20:48:26,688 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 220 transitions, 3357 flow [2024-06-03 20:48:26,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:26,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:26,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:26,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:48:26,689 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:26,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:26,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1808860081, now seen corresponding path program 1 times [2024-06-03 20:48:26,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:26,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265983417] [2024-06-03 20:48:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:26,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:26,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:26,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265983417] [2024-06-03 20:48:26,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265983417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:26,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:26,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:26,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091743837] [2024-06-03 20:48:26,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:26,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:26,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:26,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:26,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:26,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:26,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 220 transitions, 3357 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:26,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:26,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:26,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:27,836 INFO L124 PetriNetUnfolderBase]: 3978/6818 cut-off events. [2024-06-03 20:48:27,837 INFO L125 PetriNetUnfolderBase]: For 265612/265616 co-relation queries the response was YES. [2024-06-03 20:48:27,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44701 conditions, 6818 events. 3978/6818 cut-off events. For 265612/265616 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 49024 event pairs, 1199 based on Foata normal form. 46/6847 useless extension candidates. Maximal degree in co-relation 44625. Up to 4320 conditions per place. [2024-06-03 20:48:27,888 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 146 selfloop transitions, 118 changer transitions 0/270 dead transitions. [2024-06-03 20:48:27,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 270 transitions, 4236 flow [2024-06-03 20:48:27,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:27,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-03 20:48:27,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205962059620597 [2024-06-03 20:48:27,890 INFO L175 Difference]: Start difference. First operand has 160 places, 220 transitions, 3357 flow. Second operand 9 states and 229 transitions. [2024-06-03 20:48:27,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 270 transitions, 4236 flow [2024-06-03 20:48:28,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 270 transitions, 3991 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:28,212 INFO L231 Difference]: Finished difference. Result has 162 places, 222 transitions, 3433 flow [2024-06-03 20:48:28,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3112, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3433, PETRI_PLACES=162, PETRI_TRANSITIONS=222} [2024-06-03 20:48:28,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-03 20:48:28,213 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 222 transitions, 3433 flow [2024-06-03 20:48:28,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:28,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:28,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:28,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:48:28,213 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:28,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:28,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1165108211, now seen corresponding path program 2 times [2024-06-03 20:48:28,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:28,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340757449] [2024-06-03 20:48:28,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:28,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:28,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:28,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:28,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:28,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340757449] [2024-06-03 20:48:28,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340757449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:28,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:28,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:28,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419244965] [2024-06-03 20:48:28,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:28,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:28,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:28,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:28,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:28,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:28,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 222 transitions, 3433 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:28,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:28,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:28,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:29,240 INFO L124 PetriNetUnfolderBase]: 3988/6821 cut-off events. [2024-06-03 20:48:29,240 INFO L125 PetriNetUnfolderBase]: For 248999/249003 co-relation queries the response was YES. [2024-06-03 20:48:29,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44986 conditions, 6821 events. 3988/6821 cut-off events. For 248999/249003 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 48753 event pairs, 1381 based on Foata normal form. 8/6827 useless extension candidates. Maximal degree in co-relation 44909. Up to 5792 conditions per place. [2024-06-03 20:48:29,294 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 135 selfloop transitions, 116 changer transitions 0/257 dead transitions. [2024-06-03 20:48:29,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 257 transitions, 4367 flow [2024-06-03 20:48:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:29,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 20:48:29,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-03 20:48:29,295 INFO L175 Difference]: Start difference. First operand has 162 places, 222 transitions, 3433 flow. Second operand 8 states and 194 transitions. [2024-06-03 20:48:29,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 257 transitions, 4367 flow [2024-06-03 20:48:29,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 257 transitions, 4061 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:29,573 INFO L231 Difference]: Finished difference. Result has 164 places, 230 transitions, 3565 flow [2024-06-03 20:48:29,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3565, PETRI_PLACES=164, PETRI_TRANSITIONS=230} [2024-06-03 20:48:29,573 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-03 20:48:29,573 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 230 transitions, 3565 flow [2024-06-03 20:48:29,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:29,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:29,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:29,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:48:29,574 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)] === [2024-06-03 20:48:29,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:29,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1507134193, now seen corresponding path program 6 times [2024-06-03 20:48:29,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:29,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950202171] [2024-06-03 20:48:29,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:29,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:29,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:29,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950202171] [2024-06-03 20:48:29,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950202171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:29,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:29,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:29,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794215895] [2024-06-03 20:48:29,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:29,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:29,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:29,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:29,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:29,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:29,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 230 transitions, 3565 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:29,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:29,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:29,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:30,759 INFO L124 PetriNetUnfolderBase]: 4089/7013 cut-off events. [2024-06-03 20:48:30,759 INFO L125 PetriNetUnfolderBase]: For 280833/280843 co-relation queries the response was YES. [2024-06-03 20:48:30,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44962 conditions, 7013 events. 4089/7013 cut-off events. For 280833/280843 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 50554 event pairs, 1435 based on Foata normal form. 55/7064 useless extension candidates. Maximal degree in co-relation 44883. Up to 5659 conditions per place. [2024-06-03 20:48:30,818 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 162 selfloop transitions, 96 changer transitions 0/264 dead transitions. [2024-06-03 20:48:30,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 264 transitions, 4393 flow [2024-06-03 20:48:30,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:30,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:30,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:48:30,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-03 20:48:30,819 INFO L175 Difference]: Start difference. First operand has 164 places, 230 transitions, 3565 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:48:30,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 264 transitions, 4393 flow [2024-06-03 20:48:31,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 264 transitions, 4248 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:31,218 INFO L231 Difference]: Finished difference. Result has 168 places, 232 transitions, 3703 flow [2024-06-03 20:48:31,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3703, PETRI_PLACES=168, PETRI_TRANSITIONS=232} [2024-06-03 20:48:31,218 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-03 20:48:31,219 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 232 transitions, 3703 flow [2024-06-03 20:48:31,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:31,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:31,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:31,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:48:31,219 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)] === [2024-06-03 20:48:31,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:31,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1054372117, now seen corresponding path program 2 times [2024-06-03 20:48:31,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:31,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139021168] [2024-06-03 20:48:31,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:31,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:31,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:31,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139021168] [2024-06-03 20:48:31,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139021168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:31,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:31,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:31,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642779592] [2024-06-03 20:48:31,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:31,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:31,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:31,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:31,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:31,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:31,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 232 transitions, 3703 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:31,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:31,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:31,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:32,414 INFO L124 PetriNetUnfolderBase]: 4179/7203 cut-off events. [2024-06-03 20:48:32,414 INFO L125 PetriNetUnfolderBase]: For 286567/286577 co-relation queries the response was YES. [2024-06-03 20:48:32,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45543 conditions, 7203 events. 4179/7203 cut-off events. For 286567/286577 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 52607 event pairs, 1404 based on Foata normal form. 47/7246 useless extension candidates. Maximal degree in co-relation 45463. Up to 5474 conditions per place. [2024-06-03 20:48:32,483 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 166 selfloop transitions, 100 changer transitions 0/272 dead transitions. [2024-06-03 20:48:32,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 272 transitions, 4578 flow [2024-06-03 20:48:32,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:32,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:32,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 20:48:32,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-03 20:48:32,485 INFO L175 Difference]: Start difference. First operand has 168 places, 232 transitions, 3703 flow. Second operand 8 states and 201 transitions. [2024-06-03 20:48:32,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 272 transitions, 4578 flow [2024-06-03 20:48:32,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 272 transitions, 4329 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:32,920 INFO L231 Difference]: Finished difference. Result has 170 places, 234 transitions, 3744 flow [2024-06-03 20:48:32,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3454, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3744, PETRI_PLACES=170, PETRI_TRANSITIONS=234} [2024-06-03 20:48:32,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-03 20:48:32,920 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 234 transitions, 3744 flow [2024-06-03 20:48:32,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:32,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:32,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:32,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:48:32,921 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)] === [2024-06-03 20:48:32,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:32,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1773046675, now seen corresponding path program 3 times [2024-06-03 20:48:32,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:32,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407344553] [2024-06-03 20:48:32,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:32,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:32,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:33,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:33,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407344553] [2024-06-03 20:48:33,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407344553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:33,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:33,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:33,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077297118] [2024-06-03 20:48:33,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:33,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:33,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:33,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:33,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:33,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:33,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 234 transitions, 3744 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:33,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:33,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:33,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:34,037 INFO L124 PetriNetUnfolderBase]: 4396/7599 cut-off events. [2024-06-03 20:48:34,037 INFO L125 PetriNetUnfolderBase]: For 310333/310343 co-relation queries the response was YES. [2024-06-03 20:48:34,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47142 conditions, 7599 events. 4396/7599 cut-off events. For 310333/310343 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55754 event pairs, 1420 based on Foata normal form. 47/7642 useless extension candidates. Maximal degree in co-relation 47061. Up to 3271 conditions per place. [2024-06-03 20:48:34,103 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 166 selfloop transitions, 105 changer transitions 0/277 dead transitions. [2024-06-03 20:48:34,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 277 transitions, 4610 flow [2024-06-03 20:48:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:34,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:34,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-03 20:48:34,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-03 20:48:34,105 INFO L175 Difference]: Start difference. First operand has 170 places, 234 transitions, 3744 flow. Second operand 8 states and 203 transitions. [2024-06-03 20:48:34,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 277 transitions, 4610 flow [2024-06-03 20:48:34,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 277 transitions, 4347 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:34,529 INFO L231 Difference]: Finished difference. Result has 171 places, 234 transitions, 3660 flow [2024-06-03 20:48:34,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3421, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3660, PETRI_PLACES=171, PETRI_TRANSITIONS=234} [2024-06-03 20:48:34,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-03 20:48:34,530 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 234 transitions, 3660 flow [2024-06-03 20:48:34,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:34,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:34,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:34,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:48:34,530 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:34,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:34,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1024611637, now seen corresponding path program 3 times [2024-06-03 20:48:34,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:34,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044176402] [2024-06-03 20:48:34,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:34,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:34,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:34,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044176402] [2024-06-03 20:48:34,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044176402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:34,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:34,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:34,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083672500] [2024-06-03 20:48:34,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:34,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:34,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:34,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:34,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:34,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:34,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 234 transitions, 3660 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:34,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:34,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:34,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:35,620 INFO L124 PetriNetUnfolderBase]: 4386/7591 cut-off events. [2024-06-03 20:48:35,620 INFO L125 PetriNetUnfolderBase]: For 286315/286323 co-relation queries the response was YES. [2024-06-03 20:48:35,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46949 conditions, 7591 events. 4386/7591 cut-off events. For 286315/286323 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 56219 event pairs, 1658 based on Foata normal form. 9/7596 useless extension candidates. Maximal degree in co-relation 46867. Up to 6497 conditions per place. [2024-06-03 20:48:35,676 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 143 selfloop transitions, 102 changer transitions 0/251 dead transitions. [2024-06-03 20:48:35,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 251 transitions, 4424 flow [2024-06-03 20:48:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:35,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:48:35,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-03 20:48:35,677 INFO L175 Difference]: Start difference. First operand has 171 places, 234 transitions, 3660 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:48:35,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 251 transitions, 4424 flow [2024-06-03 20:48:36,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 251 transitions, 4137 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:36,071 INFO L231 Difference]: Finished difference. Result has 172 places, 234 transitions, 3588 flow [2024-06-03 20:48:36,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3373, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3588, PETRI_PLACES=172, PETRI_TRANSITIONS=234} [2024-06-03 20:48:36,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-03 20:48:36,072 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 234 transitions, 3588 flow [2024-06-03 20:48:36,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:36,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:36,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:36,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:48:36,073 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:36,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:36,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1921944601, now seen corresponding path program 1 times [2024-06-03 20:48:36,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:36,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401007520] [2024-06-03 20:48:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:36,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:36,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:36,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401007520] [2024-06-03 20:48:36,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401007520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:36,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:36,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:36,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522760686] [2024-06-03 20:48:36,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:36,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:36,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:36,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:36,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:36,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:36,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 234 transitions, 3588 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:36,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:36,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:36,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:37,182 INFO L124 PetriNetUnfolderBase]: 4374/7544 cut-off events. [2024-06-03 20:48:37,183 INFO L125 PetriNetUnfolderBase]: For 281862/281868 co-relation queries the response was YES. [2024-06-03 20:48:37,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46941 conditions, 7544 events. 4374/7544 cut-off events. For 281862/281868 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55474 event pairs, 1656 based on Foata normal form. 7/7546 useless extension candidates. Maximal degree in co-relation 46858. Up to 6749 conditions per place. [2024-06-03 20:48:37,253 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 62 changer transitions 0/286 dead transitions. [2024-06-03 20:48:37,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 286 transitions, 4963 flow [2024-06-03 20:48:37,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:48:37,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-03 20:48:37,254 INFO L175 Difference]: Start difference. First operand has 172 places, 234 transitions, 3588 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:48:37,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 286 transitions, 4963 flow [2024-06-03 20:48:37,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 286 transitions, 4373 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:37,673 INFO L231 Difference]: Finished difference. Result has 171 places, 261 transitions, 3777 flow [2024-06-03 20:48:37,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3086, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3777, PETRI_PLACES=171, PETRI_TRANSITIONS=261} [2024-06-03 20:48:37,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-03 20:48:37,674 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 261 transitions, 3777 flow [2024-06-03 20:48:37,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:37,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:37,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:37,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:48:37,675 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:37,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:37,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1206993643, now seen corresponding path program 2 times [2024-06-03 20:48:37,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:37,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382524469] [2024-06-03 20:48:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:37,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:37,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:37,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:37,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382524469] [2024-06-03 20:48:37,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382524469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:37,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:37,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:37,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225200987] [2024-06-03 20:48:37,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:37,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:37,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:37,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:37,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:37,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:37,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 261 transitions, 3777 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:37,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:37,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:37,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:38,700 INFO L124 PetriNetUnfolderBase]: 4393/7582 cut-off events. [2024-06-03 20:48:38,700 INFO L125 PetriNetUnfolderBase]: For 285447/285455 co-relation queries the response was YES. [2024-06-03 20:48:38,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47041 conditions, 7582 events. 4393/7582 cut-off events. For 285447/285455 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55784 event pairs, 1655 based on Foata normal form. 6/7584 useless extension candidates. Maximal degree in co-relation 46956. Up to 6367 conditions per place. [2024-06-03 20:48:38,772 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 150 selfloop transitions, 127 changer transitions 0/283 dead transitions. [2024-06-03 20:48:38,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 283 transitions, 4705 flow [2024-06-03 20:48:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:38,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:48:38,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-03 20:48:38,773 INFO L175 Difference]: Start difference. First operand has 171 places, 261 transitions, 3777 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:48:38,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 283 transitions, 4705 flow [2024-06-03 20:48:39,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 283 transitions, 4624 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 20:48:39,333 INFO L231 Difference]: Finished difference. Result has 175 places, 266 transitions, 4051 flow [2024-06-03 20:48:39,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3696, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4051, PETRI_PLACES=175, PETRI_TRANSITIONS=266} [2024-06-03 20:48:39,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-03 20:48:39,334 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 266 transitions, 4051 flow [2024-06-03 20:48:39,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:39,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:39,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:39,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:48:39,334 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)] === [2024-06-03 20:48:39,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:39,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1519793285, now seen corresponding path program 3 times [2024-06-03 20:48:39,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:39,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377011289] [2024-06-03 20:48:39,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:39,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:39,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:39,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377011289] [2024-06-03 20:48:39,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377011289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:39,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:39,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:39,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000234018] [2024-06-03 20:48:39,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:39,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:39,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:39,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:39,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:39,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:39,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 266 transitions, 4051 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:39,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:39,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:39,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:40,562 INFO L124 PetriNetUnfolderBase]: 4386/7572 cut-off events. [2024-06-03 20:48:40,562 INFO L125 PetriNetUnfolderBase]: For 297476/297484 co-relation queries the response was YES. [2024-06-03 20:48:40,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47483 conditions, 7572 events. 4386/7572 cut-off events. For 297476/297484 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55707 event pairs, 1662 based on Foata normal form. 6/7574 useless extension candidates. Maximal degree in co-relation 47397. Up to 6365 conditions per place. [2024-06-03 20:48:40,628 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 144 selfloop transitions, 133 changer transitions 0/283 dead transitions. [2024-06-03 20:48:40,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 283 transitions, 4897 flow [2024-06-03 20:48:40,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:40,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:40,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:48:40,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-03 20:48:40,629 INFO L175 Difference]: Start difference. First operand has 175 places, 266 transitions, 4051 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:48:40,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 283 transitions, 4897 flow [2024-06-03 20:48:41,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 283 transitions, 4615 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:41,047 INFO L231 Difference]: Finished difference. Result has 177 places, 266 transitions, 4044 flow [2024-06-03 20:48:41,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3769, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4044, PETRI_PLACES=177, PETRI_TRANSITIONS=266} [2024-06-03 20:48:41,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-03 20:48:41,047 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 266 transitions, 4044 flow [2024-06-03 20:48:41,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:41,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:41,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:41,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:48:41,051 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)] === [2024-06-03 20:48:41,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:41,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1519802213, now seen corresponding path program 1 times [2024-06-03 20:48:41,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:41,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952360937] [2024-06-03 20:48:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:41,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:41,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:41,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:41,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952360937] [2024-06-03 20:48:41,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952360937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:41,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:41,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:41,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364356663] [2024-06-03 20:48:41,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:41,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:41,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:41,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:41,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:41,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:41,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 266 transitions, 4044 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:41,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:41,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:41,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:42,115 INFO L124 PetriNetUnfolderBase]: 4389/7573 cut-off events. [2024-06-03 20:48:42,116 INFO L125 PetriNetUnfolderBase]: For 310562/310570 co-relation queries the response was YES. [2024-06-03 20:48:42,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47641 conditions, 7573 events. 4389/7573 cut-off events. For 310562/310570 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55713 event pairs, 1666 based on Foata normal form. 10/7580 useless extension candidates. Maximal degree in co-relation 47555. Up to 6997 conditions per place. [2024-06-03 20:48:42,184 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 252 selfloop transitions, 22 changer transitions 0/280 dead transitions. [2024-06-03 20:48:42,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 280 transitions, 4674 flow [2024-06-03 20:48:42,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:48:42,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:48:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-03 20:48:42,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-03 20:48:42,185 INFO L175 Difference]: Start difference. First operand has 177 places, 266 transitions, 4044 flow. Second operand 6 states and 130 transitions. [2024-06-03 20:48:42,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 280 transitions, 4674 flow [2024-06-03 20:48:42,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 280 transitions, 4266 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:42,620 INFO L231 Difference]: Finished difference. Result has 176 places, 269 transitions, 3748 flow [2024-06-03 20:48:42,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3636, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3748, PETRI_PLACES=176, PETRI_TRANSITIONS=269} [2024-06-03 20:48:42,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-03 20:48:42,621 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 269 transitions, 3748 flow [2024-06-03 20:48:42,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:42,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:42,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:42,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:48:42,621 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:42,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:42,621 INFO L85 PathProgramCache]: Analyzing trace with hash 894977349, now seen corresponding path program 1 times [2024-06-03 20:48:42,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:42,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70759816] [2024-06-03 20:48:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:42,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:42,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:42,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70759816] [2024-06-03 20:48:42,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70759816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:42,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:42,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:42,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773982203] [2024-06-03 20:48:42,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:42,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:42,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:42,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:42,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:42,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:42,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 269 transitions, 3748 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:42,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:42,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:42,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:43,728 INFO L124 PetriNetUnfolderBase]: 4404/7610 cut-off events. [2024-06-03 20:48:43,728 INFO L125 PetriNetUnfolderBase]: For 318954/318964 co-relation queries the response was YES. [2024-06-03 20:48:43,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47339 conditions, 7610 events. 4404/7610 cut-off events. For 318954/318964 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 56099 event pairs, 1554 based on Foata normal form. 11/7618 useless extension candidates. Maximal degree in co-relation 47254. Up to 6384 conditions per place. [2024-06-03 20:48:43,795 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 127 changer transitions 0/300 dead transitions. [2024-06-03 20:48:43,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 300 transitions, 4652 flow [2024-06-03 20:48:43,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:43,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:43,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:48:43,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-03 20:48:43,796 INFO L175 Difference]: Start difference. First operand has 176 places, 269 transitions, 3748 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:48:43,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 300 transitions, 4652 flow [2024-06-03 20:48:44,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 300 transitions, 4562 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:44,241 INFO L231 Difference]: Finished difference. Result has 180 places, 274 transitions, 3999 flow [2024-06-03 20:48:44,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3658, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3999, PETRI_PLACES=180, PETRI_TRANSITIONS=274} [2024-06-03 20:48:44,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-03 20:48:44,242 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 274 transitions, 3999 flow [2024-06-03 20:48:44,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:44,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:44,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:44,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:48:44,242 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)] === [2024-06-03 20:48:44,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:44,243 INFO L85 PathProgramCache]: Analyzing trace with hash 742178874, now seen corresponding path program 1 times [2024-06-03 20:48:44,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:44,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249409628] [2024-06-03 20:48:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:44,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:44,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:44,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249409628] [2024-06-03 20:48:44,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249409628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:44,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:44,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:44,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814586913] [2024-06-03 20:48:44,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:44,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:44,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:44,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:44,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 274 transitions, 3999 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:44,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:44,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:44,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:45,385 INFO L124 PetriNetUnfolderBase]: 4384/7566 cut-off events. [2024-06-03 20:48:45,385 INFO L125 PetriNetUnfolderBase]: For 330473/330475 co-relation queries the response was YES. [2024-06-03 20:48:45,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47659 conditions, 7566 events. 4384/7566 cut-off events. For 330473/330475 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55591 event pairs, 1647 based on Foata normal form. 6/7570 useless extension candidates. Maximal degree in co-relation 47573. Up to 6921 conditions per place. [2024-06-03 20:48:45,451 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 264 selfloop transitions, 28 changer transitions 0/298 dead transitions. [2024-06-03 20:48:45,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 298 transitions, 4651 flow [2024-06-03 20:48:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:45,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:45,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 20:48:45,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-03 20:48:45,455 INFO L175 Difference]: Start difference. First operand has 180 places, 274 transitions, 3999 flow. Second operand 7 states and 162 transitions. [2024-06-03 20:48:45,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 298 transitions, 4651 flow [2024-06-03 20:48:45,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 298 transitions, 4361 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:45,972 INFO L231 Difference]: Finished difference. Result has 181 places, 275 transitions, 3793 flow [2024-06-03 20:48:45,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3709, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3793, PETRI_PLACES=181, PETRI_TRANSITIONS=275} [2024-06-03 20:48:45,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-03 20:48:45,972 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 275 transitions, 3793 flow [2024-06-03 20:48:45,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:45,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:45,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:45,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:48:45,973 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:45,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:45,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2013671024, now seen corresponding path program 2 times [2024-06-03 20:48:45,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:45,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838582543] [2024-06-03 20:48:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:45,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:45,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:46,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:46,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838582543] [2024-06-03 20:48:46,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838582543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:46,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:46,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:46,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282864328] [2024-06-03 20:48:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:46,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:46,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:46,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:46,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:46,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:46,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 275 transitions, 3793 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:46,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:46,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:46,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:47,025 INFO L124 PetriNetUnfolderBase]: 4374/7546 cut-off events. [2024-06-03 20:48:47,025 INFO L125 PetriNetUnfolderBase]: For 336557/336559 co-relation queries the response was YES. [2024-06-03 20:48:47,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47205 conditions, 7546 events. 4374/7546 cut-off events. For 336557/336559 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55452 event pairs, 1557 based on Foata normal form. 4/7548 useless extension candidates. Maximal degree in co-relation 47118. Up to 6368 conditions per place. [2024-06-03 20:48:47,094 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 155 selfloop transitions, 141 changer transitions 0/302 dead transitions. [2024-06-03 20:48:47,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 302 transitions, 4727 flow [2024-06-03 20:48:47,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:47,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:48:47,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:48:47,095 INFO L175 Difference]: Start difference. First operand has 181 places, 275 transitions, 3793 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:48:47,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 302 transitions, 4727 flow [2024-06-03 20:48:47,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 302 transitions, 4677 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:47,793 INFO L231 Difference]: Finished difference. Result has 185 places, 275 transitions, 4034 flow [2024-06-03 20:48:47,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3743, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4034, PETRI_PLACES=185, PETRI_TRANSITIONS=275} [2024-06-03 20:48:47,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-03 20:48:47,794 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 275 transitions, 4034 flow [2024-06-03 20:48:47,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:47,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:47,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:47,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:48:47,794 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:47,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:47,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1758629047, now seen corresponding path program 2 times [2024-06-03 20:48:47,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:47,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385792445] [2024-06-03 20:48:47,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:47,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:47,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:47,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385792445] [2024-06-03 20:48:47,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385792445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:47,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:47,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:47,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328973492] [2024-06-03 20:48:47,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:47,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:47,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:47,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:47,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:47,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:47,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 275 transitions, 4034 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:47,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:47,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:47,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:49,045 INFO L124 PetriNetUnfolderBase]: 4393/7581 cut-off events. [2024-06-03 20:48:49,045 INFO L125 PetriNetUnfolderBase]: For 354167/354175 co-relation queries the response was YES. [2024-06-03 20:48:49,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48325 conditions, 7581 events. 4393/7581 cut-off events. For 354167/354175 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55770 event pairs, 1587 based on Foata normal form. 6/7583 useless extension candidates. Maximal degree in co-relation 48237. Up to 6387 conditions per place. [2024-06-03 20:48:49,121 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 148 selfloop transitions, 143 changer transitions 0/297 dead transitions. [2024-06-03 20:48:49,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 297 transitions, 5020 flow [2024-06-03 20:48:49,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:49,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:48:49,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-03 20:48:49,122 INFO L175 Difference]: Start difference. First operand has 185 places, 275 transitions, 4034 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:48:49,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 297 transitions, 5020 flow [2024-06-03 20:48:49,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 297 transitions, 4763 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:49,644 INFO L231 Difference]: Finished difference. Result has 186 places, 280 transitions, 4158 flow [2024-06-03 20:48:49,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3783, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4158, PETRI_PLACES=186, PETRI_TRANSITIONS=280} [2024-06-03 20:48:49,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-03 20:48:49,644 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 280 transitions, 4158 flow [2024-06-03 20:48:49,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:49,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:49,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:49,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:48:49,645 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:49,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:49,645 INFO L85 PathProgramCache]: Analyzing trace with hash 895294479, now seen corresponding path program 3 times [2024-06-03 20:48:49,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:49,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650523847] [2024-06-03 20:48:49,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:49,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:49,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:49,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:49,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650523847] [2024-06-03 20:48:49,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650523847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:49,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:49,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:48:49,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253442825] [2024-06-03 20:48:49,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:49,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:48:49,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:49,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:48:49,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:48:49,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:49,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 280 transitions, 4158 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:49,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:49,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:49,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:50,837 INFO L124 PetriNetUnfolderBase]: 4386/7574 cut-off events. [2024-06-03 20:48:50,837 INFO L125 PetriNetUnfolderBase]: For 364533/364541 co-relation queries the response was YES. [2024-06-03 20:48:50,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48450 conditions, 7574 events. 4386/7574 cut-off events. For 364533/364541 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55744 event pairs, 1587 based on Foata normal form. 6/7576 useless extension candidates. Maximal degree in co-relation 48361. Up to 6383 conditions per place. [2024-06-03 20:48:50,893 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 154 selfloop transitions, 136 changer transitions 0/296 dead transitions. [2024-06-03 20:48:50,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 296 transitions, 4968 flow [2024-06-03 20:48:50,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:50,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:50,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:48:50,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:48:50,894 INFO L175 Difference]: Start difference. First operand has 186 places, 280 transitions, 4158 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:48:50,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 296 transitions, 4968 flow [2024-06-03 20:48:51,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 296 transitions, 4710 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 20:48:51,440 INFO L231 Difference]: Finished difference. Result has 189 places, 280 transitions, 4182 flow [2024-06-03 20:48:51,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3900, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4182, PETRI_PLACES=189, PETRI_TRANSITIONS=280} [2024-06-03 20:48:51,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-03 20:48:51,441 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 280 transitions, 4182 flow [2024-06-03 20:48:51,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:51,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:51,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:51,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:48:51,441 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:51,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:51,441 INFO L85 PathProgramCache]: Analyzing trace with hash -866355156, now seen corresponding path program 3 times [2024-06-03 20:48:51,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:51,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696099092] [2024-06-03 20:48:51,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:51,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:51,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:51,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696099092] [2024-06-03 20:48:51,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696099092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:51,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:51,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:51,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909863040] [2024-06-03 20:48:51,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:51,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:51,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:51,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:51,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:51,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:51,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 280 transitions, 4182 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:51,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:51,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:51,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:52,532 INFO L124 PetriNetUnfolderBase]: 4365/7537 cut-off events. [2024-06-03 20:48:52,532 INFO L125 PetriNetUnfolderBase]: For 374397/374403 co-relation queries the response was YES. [2024-06-03 20:48:52,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48347 conditions, 7537 events. 4365/7537 cut-off events. For 374397/374403 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 55388 event pairs, 1584 based on Foata normal form. 4/7536 useless extension candidates. Maximal degree in co-relation 48257. Up to 6760 conditions per place. [2024-06-03 20:48:52,602 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 61 changer transitions 0/311 dead transitions. [2024-06-03 20:48:52,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 311 transitions, 5114 flow [2024-06-03 20:48:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:52,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 20:48:52,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-03 20:48:52,603 INFO L175 Difference]: Start difference. First operand has 189 places, 280 transitions, 4182 flow. Second operand 8 states and 187 transitions. [2024-06-03 20:48:52,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 311 transitions, 5114 flow [2024-06-03 20:48:53,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 311 transitions, 4618 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-03 20:48:53,227 INFO L231 Difference]: Finished difference. Result has 190 places, 284 transitions, 3936 flow [2024-06-03 20:48:53,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3686, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3936, PETRI_PLACES=190, PETRI_TRANSITIONS=284} [2024-06-03 20:48:53,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-03 20:48:53,228 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 284 transitions, 3936 flow [2024-06-03 20:48:53,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:53,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:53,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:53,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:48:53,228 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:53,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1334522038, now seen corresponding path program 4 times [2024-06-03 20:48:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:53,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974026640] [2024-06-03 20:48:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:53,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:53,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:53,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:53,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974026640] [2024-06-03 20:48:53,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974026640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:53,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:53,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:53,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335039377] [2024-06-03 20:48:53,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:53,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:53,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:53,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:53,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:53,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:53,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 284 transitions, 3936 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:53,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:53,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:53,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:54,377 INFO L124 PetriNetUnfolderBase]: 4337/7475 cut-off events. [2024-06-03 20:48:54,378 INFO L125 PetriNetUnfolderBase]: For 380770/380776 co-relation queries the response was YES. [2024-06-03 20:48:54,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47519 conditions, 7475 events. 4337/7475 cut-off events. For 380770/380776 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 54666 event pairs, 1637 based on Foata normal form. 5/7475 useless extension candidates. Maximal degree in co-relation 47427. Up to 6350 conditions per place. [2024-06-03 20:48:54,437 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 137 changer transitions 1/307 dead transitions. [2024-06-03 20:48:54,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 307 transitions, 4794 flow [2024-06-03 20:48:54,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:54,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:54,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:48:54,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:48:54,438 INFO L175 Difference]: Start difference. First operand has 190 places, 284 transitions, 3936 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:48:54,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 307 transitions, 4794 flow [2024-06-03 20:48:55,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 307 transitions, 4652 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:55,162 INFO L231 Difference]: Finished difference. Result has 192 places, 283 transitions, 4056 flow [2024-06-03 20:48:55,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3794, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4056, PETRI_PLACES=192, PETRI_TRANSITIONS=283} [2024-06-03 20:48:55,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-03 20:48:55,163 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 283 transitions, 4056 flow [2024-06-03 20:48:55,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:55,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:55,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:55,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:48:55,163 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:55,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:55,163 INFO L85 PathProgramCache]: Analyzing trace with hash -138412214, now seen corresponding path program 5 times [2024-06-03 20:48:55,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:55,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414361924] [2024-06-03 20:48:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:55,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:55,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:55,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:55,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414361924] [2024-06-03 20:48:55,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414361924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:55,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:55,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:55,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247711734] [2024-06-03 20:48:55,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:55,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:55,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:55,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:55,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:55,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:55,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 283 transitions, 4056 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:55,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:55,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:55,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:56,217 INFO L124 PetriNetUnfolderBase]: 4312/7439 cut-off events. [2024-06-03 20:48:56,217 INFO L125 PetriNetUnfolderBase]: For 391652/391660 co-relation queries the response was YES. [2024-06-03 20:48:56,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47811 conditions, 7439 events. 4312/7439 cut-off events. For 391652/391660 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 54499 event pairs, 1651 based on Foata normal form. 5/7440 useless extension candidates. Maximal degree in co-relation 47718. Up to 6321 conditions per place. [2024-06-03 20:48:56,286 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 158 selfloop transitions, 134 changer transitions 1/299 dead transitions. [2024-06-03 20:48:56,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 299 transitions, 4884 flow [2024-06-03 20:48:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:56,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:48:56,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 20:48:56,287 INFO L175 Difference]: Start difference. First operand has 192 places, 283 transitions, 4056 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:48:56,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 299 transitions, 4884 flow [2024-06-03 20:48:56,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 299 transitions, 4584 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:56,944 INFO L231 Difference]: Finished difference. Result has 192 places, 282 transitions, 4014 flow [2024-06-03 20:48:56,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3756, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4014, PETRI_PLACES=192, PETRI_TRANSITIONS=282} [2024-06-03 20:48:56,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-03 20:48:56,945 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 282 transitions, 4014 flow [2024-06-03 20:48:56,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:56,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:56,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:56,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:48:56,945 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)] === [2024-06-03 20:48:56,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:56,946 INFO L85 PathProgramCache]: Analyzing trace with hash 563708312, now seen corresponding path program 6 times [2024-06-03 20:48:56,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:56,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84152074] [2024-06-03 20:48:56,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:56,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:56,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:57,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:57,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84152074] [2024-06-03 20:48:57,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84152074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:57,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:57,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:57,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707846385] [2024-06-03 20:48:57,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:57,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:57,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:57,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:57,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:57,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:57,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 282 transitions, 4014 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:57,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:57,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:57,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:58,058 INFO L124 PetriNetUnfolderBase]: 4115/7059 cut-off events. [2024-06-03 20:48:58,058 INFO L125 PetriNetUnfolderBase]: For 401149/401157 co-relation queries the response was YES. [2024-06-03 20:48:58,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46031 conditions, 7059 events. 4115/7059 cut-off events. For 401149/401157 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 50719 event pairs, 1569 based on Foata normal form. 7/7062 useless extension candidates. Maximal degree in co-relation 45937. Up to 5986 conditions per place. [2024-06-03 20:48:58,115 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 161 selfloop transitions, 127 changer transitions 3/297 dead transitions. [2024-06-03 20:48:58,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 297 transitions, 4736 flow [2024-06-03 20:48:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:58,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:48:58,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:48:58,116 INFO L175 Difference]: Start difference. First operand has 192 places, 282 transitions, 4014 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:48:58,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 297 transitions, 4736 flow [2024-06-03 20:48:58,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 297 transitions, 4453 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 20:48:58,768 INFO L231 Difference]: Finished difference. Result has 194 places, 279 transitions, 3941 flow [2024-06-03 20:48:58,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3731, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3941, PETRI_PLACES=194, PETRI_TRANSITIONS=279} [2024-06-03 20:48:58,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-03 20:48:58,769 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 279 transitions, 3941 flow [2024-06-03 20:48:58,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:58,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:58,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:58,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:48:58,774 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:58,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:58,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1685194395, now seen corresponding path program 1 times [2024-06-03 20:48:58,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:58,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008059208] [2024-06-03 20:48:58,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:58,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:58,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:58,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:58,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008059208] [2024-06-03 20:48:58,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008059208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:58,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:58,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:48:58,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970146770] [2024-06-03 20:48:58,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:58,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:48:58,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:58,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:48:58,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:48:58,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:48:58,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 279 transitions, 3941 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:58,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:58,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:48:58,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:59,835 INFO L124 PetriNetUnfolderBase]: 4070/6991 cut-off events. [2024-06-03 20:48:59,835 INFO L125 PetriNetUnfolderBase]: For 413806/413812 co-relation queries the response was YES. [2024-06-03 20:48:59,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46107 conditions, 6991 events. 4070/6991 cut-off events. For 413806/413812 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 49975 event pairs, 1548 based on Foata normal form. 4/6990 useless extension candidates. Maximal degree in co-relation 46012. Up to 6258 conditions per place. [2024-06-03 20:48:59,907 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 64 changer transitions 1/303 dead transitions. [2024-06-03 20:48:59,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 303 transitions, 4793 flow [2024-06-03 20:48:59,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:48:59,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:48:59,909 INFO L175 Difference]: Start difference. First operand has 194 places, 279 transitions, 3941 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:48:59,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 303 transitions, 4793 flow [2024-06-03 20:49:00,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 303 transitions, 4432 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-03 20:49:00,679 INFO L231 Difference]: Finished difference. Result has 193 places, 284 transitions, 3842 flow [2024-06-03 20:49:00,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3842, PETRI_PLACES=193, PETRI_TRANSITIONS=284} [2024-06-03 20:49:00,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-03 20:49:00,679 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 284 transitions, 3842 flow [2024-06-03 20:49:00,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:00,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:00,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:00,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:49:00,680 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:00,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:00,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1334508367, now seen corresponding path program 2 times [2024-06-03 20:49:00,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:00,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67456861] [2024-06-03 20:49:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:00,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:00,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:00,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:00,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67456861] [2024-06-03 20:49:00,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67456861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:00,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:00,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:00,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079410874] [2024-06-03 20:49:00,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:00,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:00,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:00,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:00,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:00,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:00,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 284 transitions, 3842 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:00,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:00,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:00,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:01,908 INFO L124 PetriNetUnfolderBase]: 4096/7040 cut-off events. [2024-06-03 20:49:01,908 INFO L125 PetriNetUnfolderBase]: For 431920/431926 co-relation queries the response was YES. [2024-06-03 20:49:01,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46500 conditions, 7040 events. 4096/7040 cut-off events. For 431920/431926 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 50450 event pairs, 1550 based on Foata normal form. 7/7042 useless extension candidates. Maximal degree in co-relation 46403. Up to 5938 conditions per place. [2024-06-03 20:49:01,974 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 153 selfloop transitions, 156 changer transitions 3/318 dead transitions. [2024-06-03 20:49:01,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 318 transitions, 5022 flow [2024-06-03 20:49:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:01,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:01,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 20:49:01,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:49:01,975 INFO L175 Difference]: Start difference. First operand has 193 places, 284 transitions, 3842 flow. Second operand 8 states and 192 transitions. [2024-06-03 20:49:01,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 318 transitions, 5022 flow [2024-06-03 20:49:02,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 318 transitions, 4892 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:49:02,750 INFO L231 Difference]: Finished difference. Result has 197 places, 291 transitions, 4196 flow [2024-06-03 20:49:02,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3712, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4196, PETRI_PLACES=197, PETRI_TRANSITIONS=291} [2024-06-03 20:49:02,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-03 20:49:02,751 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 291 transitions, 4196 flow [2024-06-03 20:49:02,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:02,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:02,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:02,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:49:02,751 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:02,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:02,751 INFO L85 PathProgramCache]: Analyzing trace with hash 569430323, now seen corresponding path program 3 times [2024-06-03 20:49:02,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:02,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588700954] [2024-06-03 20:49:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:02,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:02,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588700954] [2024-06-03 20:49:02,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588700954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:02,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:02,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:02,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7987851] [2024-06-03 20:49:02,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:02,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:02,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:02,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:02,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:02,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:02,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 291 transitions, 4196 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:02,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:02,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:02,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:03,868 INFO L124 PetriNetUnfolderBase]: 4078/7017 cut-off events. [2024-06-03 20:49:03,868 INFO L125 PetriNetUnfolderBase]: For 439012/439018 co-relation queries the response was YES. [2024-06-03 20:49:03,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46893 conditions, 7017 events. 4078/7017 cut-off events. For 439012/439018 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 50385 event pairs, 1550 based on Foata normal form. 4/7016 useless extension candidates. Maximal degree in co-relation 46794. Up to 5927 conditions per place. [2024-06-03 20:49:03,932 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 150 selfloop transitions, 157 changer transitions 1/314 dead transitions. [2024-06-03 20:49:03,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 314 transitions, 5088 flow [2024-06-03 20:49:03,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:03,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:03,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:49:03,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-03 20:49:03,934 INFO L175 Difference]: Start difference. First operand has 197 places, 291 transitions, 4196 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:49:03,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 314 transitions, 5088 flow [2024-06-03 20:49:04,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 314 transitions, 4882 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:04,762 INFO L231 Difference]: Finished difference. Result has 201 places, 290 transitions, 4307 flow [2024-06-03 20:49:04,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3990, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4307, PETRI_PLACES=201, PETRI_TRANSITIONS=290} [2024-06-03 20:49:04,763 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-03 20:49:04,763 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 290 transitions, 4307 flow [2024-06-03 20:49:04,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:04,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:04,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:04,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:49:04,764 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:04,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:04,764 INFO L85 PathProgramCache]: Analyzing trace with hash -131046893, now seen corresponding path program 4 times [2024-06-03 20:49:04,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:04,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069671522] [2024-06-03 20:49:04,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:04,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:04,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:04,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:04,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069671522] [2024-06-03 20:49:04,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069671522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:04,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:04,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:04,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441917275] [2024-06-03 20:49:04,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:04,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:04,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:04,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:04,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:04,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:04,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 290 transitions, 4307 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:04,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:04,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:04,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:05,782 INFO L124 PetriNetUnfolderBase]: 4006/6883 cut-off events. [2024-06-03 20:49:05,783 INFO L125 PetriNetUnfolderBase]: For 450455/450463 co-relation queries the response was YES. [2024-06-03 20:49:05,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46547 conditions, 6883 events. 4006/6883 cut-off events. For 450455/450463 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 49077 event pairs, 1522 based on Foata normal form. 6/6885 useless extension candidates. Maximal degree in co-relation 46447. Up to 5800 conditions per place. [2024-06-03 20:49:05,851 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 159 selfloop transitions, 137 changer transitions 3/305 dead transitions. [2024-06-03 20:49:05,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 305 transitions, 5053 flow [2024-06-03 20:49:05,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:49:05,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:49:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:49:05,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 20:49:05,852 INFO L175 Difference]: Start difference. First operand has 201 places, 290 transitions, 4307 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:49:05,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 305 transitions, 5053 flow [2024-06-03 20:49:06,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 305 transitions, 4763 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:06,859 INFO L231 Difference]: Finished difference. Result has 201 places, 287 transitions, 4246 flow [2024-06-03 20:49:06,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4019, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4246, PETRI_PLACES=201, PETRI_TRANSITIONS=287} [2024-06-03 20:49:06,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-03 20:49:06,859 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 287 transitions, 4246 flow [2024-06-03 20:49:06,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:06,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:06,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:06,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:49:06,860 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)] === [2024-06-03 20:49:06,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:06,860 INFO L85 PathProgramCache]: Analyzing trace with hash -818748930, now seen corresponding path program 1 times [2024-06-03 20:49:06,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:06,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193036208] [2024-06-03 20:49:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:06,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:07,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:07,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:07,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193036208] [2024-06-03 20:49:07,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193036208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:07,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:07,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:07,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142220312] [2024-06-03 20:49:07,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:07,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:07,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:07,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:07,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:07,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:07,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 287 transitions, 4246 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:07,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:07,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:07,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:08,010 INFO L124 PetriNetUnfolderBase]: 4003/6858 cut-off events. [2024-06-03 20:49:08,010 INFO L125 PetriNetUnfolderBase]: For 488619/488621 co-relation queries the response was YES. [2024-06-03 20:49:08,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48205 conditions, 6858 events. 4003/6858 cut-off events. For 488619/488621 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 48548 event pairs, 1339 based on Foata normal form. 14/6870 useless extension candidates. Maximal degree in co-relation 48105. Up to 5839 conditions per place. [2024-06-03 20:49:08,080 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 297 selfloop transitions, 37 changer transitions 0/340 dead transitions. [2024-06-03 20:49:08,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 340 transitions, 5397 flow [2024-06-03 20:49:08,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:08,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:08,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 20:49:08,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-03 20:49:08,082 INFO L175 Difference]: Start difference. First operand has 201 places, 287 transitions, 4246 flow. Second operand 8 states and 194 transitions. [2024-06-03 20:49:08,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 340 transitions, 5397 flow [2024-06-03 20:49:09,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 340 transitions, 4701 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-03 20:49:09,053 INFO L231 Difference]: Finished difference. Result has 200 places, 300 transitions, 3918 flow [2024-06-03 20:49:09,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3562, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3918, PETRI_PLACES=200, PETRI_TRANSITIONS=300} [2024-06-03 20:49:09,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-03 20:49:09,054 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 300 transitions, 3918 flow [2024-06-03 20:49:09,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:09,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:09,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:09,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:49:09,054 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)] === [2024-06-03 20:49:09,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:09,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1713698762, now seen corresponding path program 2 times [2024-06-03 20:49:09,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:09,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865969957] [2024-06-03 20:49:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:09,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:09,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:09,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:09,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865969957] [2024-06-03 20:49:09,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865969957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:09,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:09,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:09,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338615932] [2024-06-03 20:49:09,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:09,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:09,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:09,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:09,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:09,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:09,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 300 transitions, 3918 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:09,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:09,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:09,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:10,218 INFO L124 PetriNetUnfolderBase]: 3996/6847 cut-off events. [2024-06-03 20:49:10,219 INFO L125 PetriNetUnfolderBase]: For 494786/494788 co-relation queries the response was YES. [2024-06-03 20:49:10,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47180 conditions, 6847 events. 3996/6847 cut-off events. For 494786/494788 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 48462 event pairs, 1436 based on Foata normal form. 22/6867 useless extension candidates. Maximal degree in co-relation 47079. Up to 5686 conditions per place. [2024-06-03 20:49:10,286 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 168 selfloop transitions, 168 changer transitions 0/342 dead transitions. [2024-06-03 20:49:10,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 342 transitions, 4862 flow [2024-06-03 20:49:10,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:49:10,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:49:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-03 20:49:10,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:49:10,287 INFO L175 Difference]: Start difference. First operand has 200 places, 300 transitions, 3918 flow. Second operand 10 states and 240 transitions. [2024-06-03 20:49:10,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 342 transitions, 4862 flow [2024-06-03 20:49:11,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 342 transitions, 4781 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-03 20:49:11,211 INFO L231 Difference]: Finished difference. Result has 207 places, 302 transitions, 4237 flow [2024-06-03 20:49:11,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4237, PETRI_PLACES=207, PETRI_TRANSITIONS=302} [2024-06-03 20:49:11,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-03 20:49:11,212 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 302 transitions, 4237 flow [2024-06-03 20:49:11,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:11,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:11,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:11,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:49:11,213 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)] === [2024-06-03 20:49:11,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:11,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1317429518, now seen corresponding path program 3 times [2024-06-03 20:49:11,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:11,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041763169] [2024-06-03 20:49:11,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:11,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:11,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:11,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041763169] [2024-06-03 20:49:11,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041763169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:11,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:11,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:11,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298393684] [2024-06-03 20:49:11,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:11,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:11,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:11,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:11,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:11,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:11,398 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 302 transitions, 4237 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:11,398 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:11,398 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:11,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:12,370 INFO L124 PetriNetUnfolderBase]: 4040/6913 cut-off events. [2024-06-03 20:49:12,371 INFO L125 PetriNetUnfolderBase]: For 500271/500273 co-relation queries the response was YES. [2024-06-03 20:49:12,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48419 conditions, 6913 events. 4040/6913 cut-off events. For 500271/500273 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 49038 event pairs, 1438 based on Foata normal form. 14/6923 useless extension candidates. Maximal degree in co-relation 48316. Up to 5786 conditions per place. [2024-06-03 20:49:12,434 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 157 changer transitions 0/335 dead transitions. [2024-06-03 20:49:12,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 335 transitions, 5166 flow [2024-06-03 20:49:12,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:12,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-03 20:49:12,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-03 20:49:12,435 INFO L175 Difference]: Start difference. First operand has 207 places, 302 transitions, 4237 flow. Second operand 9 states and 212 transitions. [2024-06-03 20:49:12,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 335 transitions, 5166 flow [2024-06-03 20:49:13,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 335 transitions, 4810 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 20:49:13,467 INFO L231 Difference]: Finished difference. Result has 208 places, 305 transitions, 4281 flow [2024-06-03 20:49:13,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3881, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4281, PETRI_PLACES=208, PETRI_TRANSITIONS=305} [2024-06-03 20:49:13,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-03 20:49:13,467 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 305 transitions, 4281 flow [2024-06-03 20:49:13,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:13,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:13,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:13,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:49:13,468 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)] === [2024-06-03 20:49:13,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:13,468 INFO L85 PathProgramCache]: Analyzing trace with hash 294966884, now seen corresponding path program 4 times [2024-06-03 20:49:13,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:13,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108516161] [2024-06-03 20:49:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:13,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:13,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:13,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108516161] [2024-06-03 20:49:13,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108516161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:13,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:13,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:13,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099671839] [2024-06-03 20:49:13,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:13,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:13,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:13,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:13,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:13,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:13,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 305 transitions, 4281 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:13,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:13,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:13,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:14,582 INFO L124 PetriNetUnfolderBase]: 3942/6735 cut-off events. [2024-06-03 20:49:14,582 INFO L125 PetriNetUnfolderBase]: For 512123/512131 co-relation queries the response was YES. [2024-06-03 20:49:14,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45403 conditions, 6735 events. 3942/6735 cut-off events. For 512123/512131 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 47311 event pairs, 1356 based on Foata normal form. 57/6786 useless extension candidates. Maximal degree in co-relation 45299. Up to 5434 conditions per place. [2024-06-03 20:49:14,651 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 180 selfloop transitions, 142 changer transitions 0/328 dead transitions. [2024-06-03 20:49:14,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 328 transitions, 5145 flow [2024-06-03 20:49:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:14,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:49:14,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 20:49:14,652 INFO L175 Difference]: Start difference. First operand has 208 places, 305 transitions, 4281 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:49:14,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 328 transitions, 5145 flow [2024-06-03 20:49:15,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 328 transitions, 4796 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:15,611 INFO L231 Difference]: Finished difference. Result has 209 places, 306 transitions, 4264 flow [2024-06-03 20:49:15,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3932, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4264, PETRI_PLACES=209, PETRI_TRANSITIONS=306} [2024-06-03 20:49:15,611 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-03 20:49:15,611 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 306 transitions, 4264 flow [2024-06-03 20:49:15,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:15,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:15,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:15,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:49:15,612 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)] === [2024-06-03 20:49:15,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:15,612 INFO L85 PathProgramCache]: Analyzing trace with hash 226802244, now seen corresponding path program 1 times [2024-06-03 20:49:15,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:15,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492598777] [2024-06-03 20:49:15,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:15,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:15,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:15,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:15,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492598777] [2024-06-03 20:49:15,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492598777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:15,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:15,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:15,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118028420] [2024-06-03 20:49:15,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:15,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:15,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:15,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:15,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:15,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:15,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 306 transitions, 4264 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:15,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:15,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:15,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:16,773 INFO L124 PetriNetUnfolderBase]: 3937/6739 cut-off events. [2024-06-03 20:49:16,773 INFO L125 PetriNetUnfolderBase]: For 426071/426079 co-relation queries the response was YES. [2024-06-03 20:49:16,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45236 conditions, 6739 events. 3937/6739 cut-off events. For 426071/426079 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 47564 event pairs, 1344 based on Foata normal form. 8/6744 useless extension candidates. Maximal degree in co-relation 45131. Up to 6211 conditions per place. [2024-06-03 20:49:16,831 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 293 selfloop transitions, 20 changer transitions 0/319 dead transitions. [2024-06-03 20:49:16,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 319 transitions, 4958 flow [2024-06-03 20:49:16,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:49:16,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:49:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-03 20:49:16,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 20:49:16,832 INFO L175 Difference]: Start difference. First operand has 209 places, 306 transitions, 4264 flow. Second operand 6 states and 129 transitions. [2024-06-03 20:49:16,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 319 transitions, 4958 flow [2024-06-03 20:49:17,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 319 transitions, 4632 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:17,735 INFO L231 Difference]: Finished difference. Result has 209 places, 308 transitions, 4029 flow [2024-06-03 20:49:17,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3938, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4029, PETRI_PLACES=209, PETRI_TRANSITIONS=308} [2024-06-03 20:49:17,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-03 20:49:17,736 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 308 transitions, 4029 flow [2024-06-03 20:49:17,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:17,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:17,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:17,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:49:17,736 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)] === [2024-06-03 20:49:17,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:17,736 INFO L85 PathProgramCache]: Analyzing trace with hash 241087044, now seen corresponding path program 2 times [2024-06-03 20:49:17,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:17,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96328791] [2024-06-03 20:49:17,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:17,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:17,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:17,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96328791] [2024-06-03 20:49:17,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96328791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:17,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:17,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:49:17,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929654417] [2024-06-03 20:49:17,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:17,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:49:17,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:17,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:49:17,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:49:17,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:17,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 308 transitions, 4029 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:17,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:17,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:17,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:18,795 INFO L124 PetriNetUnfolderBase]: 3932/6744 cut-off events. [2024-06-03 20:49:18,795 INFO L125 PetriNetUnfolderBase]: For 430709/430717 co-relation queries the response was YES. [2024-06-03 20:49:18,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44302 conditions, 6744 events. 3932/6744 cut-off events. For 430709/430717 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 47689 event pairs, 1324 based on Foata normal form. 8/6749 useless extension candidates. Maximal degree in co-relation 44196. Up to 6184 conditions per place. [2024-06-03 20:49:18,867 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 294 selfloop transitions, 22 changer transitions 0/322 dead transitions. [2024-06-03 20:49:18,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 322 transitions, 4735 flow [2024-06-03 20:49:18,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:49:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:49:18,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-03 20:49:18,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 20:49:18,868 INFO L175 Difference]: Start difference. First operand has 209 places, 308 transitions, 4029 flow. Second operand 6 states and 129 transitions. [2024-06-03 20:49:18,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 322 transitions, 4735 flow [2024-06-03 20:49:19,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 322 transitions, 4664 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:19,688 INFO L231 Difference]: Finished difference. Result has 211 places, 310 transitions, 4057 flow [2024-06-03 20:49:19,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4057, PETRI_PLACES=211, PETRI_TRANSITIONS=310} [2024-06-03 20:49:19,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-03 20:49:19,689 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 310 transitions, 4057 flow [2024-06-03 20:49:19,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:19,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:19,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:19,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:49:19,689 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)] === [2024-06-03 20:49:19,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:19,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1461589258, now seen corresponding path program 1 times [2024-06-03 20:49:19,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:19,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486604181] [2024-06-03 20:49:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:19,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:19,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:19,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486604181] [2024-06-03 20:49:19,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486604181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:19,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:19,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:19,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324428080] [2024-06-03 20:49:19,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:19,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:19,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:19,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:19,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:19,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:19,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 310 transitions, 4057 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:19,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:19,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:19,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:20,769 INFO L124 PetriNetUnfolderBase]: 3940/6754 cut-off events. [2024-06-03 20:49:20,769 INFO L125 PetriNetUnfolderBase]: For 445395/445395 co-relation queries the response was YES. [2024-06-03 20:49:20,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44674 conditions, 6754 events. 3940/6754 cut-off events. For 445395/445395 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 47768 event pairs, 1242 based on Foata normal form. 2/6754 useless extension candidates. Maximal degree in co-relation 44567. Up to 6178 conditions per place. [2024-06-03 20:49:20,837 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 304 selfloop transitions, 28 changer transitions 0/338 dead transitions. [2024-06-03 20:49:20,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 338 transitions, 4987 flow [2024-06-03 20:49:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-03 20:49:20,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 20:49:20,838 INFO L175 Difference]: Start difference. First operand has 211 places, 310 transitions, 4057 flow. Second operand 8 states and 172 transitions. [2024-06-03 20:49:20,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 338 transitions, 4987 flow [2024-06-03 20:49:21,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 338 transitions, 4904 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:21,686 INFO L231 Difference]: Finished difference. Result has 215 places, 314 transitions, 4123 flow [2024-06-03 20:49:21,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3974, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4123, PETRI_PLACES=215, PETRI_TRANSITIONS=314} [2024-06-03 20:49:21,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-03 20:49:21,687 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 314 transitions, 4123 flow [2024-06-03 20:49:21,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:21,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:21,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:21,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:49:21,687 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)] === [2024-06-03 20:49:21,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:21,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1464446218, now seen corresponding path program 2 times [2024-06-03 20:49:21,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:21,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365277083] [2024-06-03 20:49:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:21,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:21,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:21,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:21,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365277083] [2024-06-03 20:49:21,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365277083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:21,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:21,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:21,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635418444] [2024-06-03 20:49:21,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:21,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:21,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:21,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:21,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:21,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 314 transitions, 4123 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:21,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:21,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:21,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:22,801 INFO L124 PetriNetUnfolderBase]: 3935/6747 cut-off events. [2024-06-03 20:49:22,802 INFO L125 PetriNetUnfolderBase]: For 454963/454963 co-relation queries the response was YES. [2024-06-03 20:49:22,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44723 conditions, 6747 events. 3935/6747 cut-off events. For 454963/454963 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 47709 event pairs, 1337 based on Foata normal form. 2/6747 useless extension candidates. Maximal degree in co-relation 44615. Up to 6208 conditions per place. [2024-06-03 20:49:22,870 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 302 selfloop transitions, 25 changer transitions 0/333 dead transitions. [2024-06-03 20:49:22,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 333 transitions, 4823 flow [2024-06-03 20:49:22,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:22,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:22,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 20:49:22,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:49:22,871 INFO L175 Difference]: Start difference. First operand has 215 places, 314 transitions, 4123 flow. Second operand 8 states and 168 transitions. [2024-06-03 20:49:22,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 333 transitions, 4823 flow [2024-06-03 20:49:23,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 333 transitions, 4727 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:23,758 INFO L231 Difference]: Finished difference. Result has 219 places, 314 transitions, 4082 flow [2024-06-03 20:49:23,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4027, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4082, PETRI_PLACES=219, PETRI_TRANSITIONS=314} [2024-06-03 20:49:23,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-03 20:49:23,759 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 314 transitions, 4082 flow [2024-06-03 20:49:23,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:23,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:23,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:23,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:49:23,760 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:23,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:23,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1579922086, now seen corresponding path program 1 times [2024-06-03 20:49:23,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:23,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479818452] [2024-06-03 20:49:23,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:23,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:23,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:23,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:23,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479818452] [2024-06-03 20:49:23,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479818452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:23,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:23,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:23,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169923119] [2024-06-03 20:49:23,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:23,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:23,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:23,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:23,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:23,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:23,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 314 transitions, 4082 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:23,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:23,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:23,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:24,946 INFO L124 PetriNetUnfolderBase]: 4111/7033 cut-off events. [2024-06-03 20:49:24,946 INFO L125 PetriNetUnfolderBase]: For 580471/580477 co-relation queries the response was YES. [2024-06-03 20:49:24,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46279 conditions, 7033 events. 4111/7033 cut-off events. For 580471/580477 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 50103 event pairs, 1403 based on Foata normal form. 55/7083 useless extension candidates. Maximal degree in co-relation 46169. Up to 5709 conditions per place. [2024-06-03 20:49:25,018 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 188 selfloop transitions, 152 changer transitions 0/346 dead transitions. [2024-06-03 20:49:25,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 346 transitions, 5042 flow [2024-06-03 20:49:25,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:25,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:25,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-03 20:49:25,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-03 20:49:25,019 INFO L175 Difference]: Start difference. First operand has 219 places, 314 transitions, 4082 flow. Second operand 9 states and 215 transitions. [2024-06-03 20:49:25,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 346 transitions, 5042 flow [2024-06-03 20:49:25,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 346 transitions, 4981 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:25,791 INFO L231 Difference]: Finished difference. Result has 221 places, 317 transitions, 4409 flow [2024-06-03 20:49:25,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4021, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4409, PETRI_PLACES=221, PETRI_TRANSITIONS=317} [2024-06-03 20:49:25,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-03 20:49:25,792 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 317 transitions, 4409 flow [2024-06-03 20:49:25,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:25,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:25,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:25,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:49:25,792 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:25,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:25,793 INFO L85 PathProgramCache]: Analyzing trace with hash 240796326, now seen corresponding path program 2 times [2024-06-03 20:49:25,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:25,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033210989] [2024-06-03 20:49:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:25,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:25,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:25,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:25,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033210989] [2024-06-03 20:49:25,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033210989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:25,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:25,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:25,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162239014] [2024-06-03 20:49:25,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:25,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:25,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:25,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:25,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:25,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:25,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 317 transitions, 4409 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:25,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:25,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:25,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:27,015 INFO L124 PetriNetUnfolderBase]: 4155/7112 cut-off events. [2024-06-03 20:49:27,016 INFO L125 PetriNetUnfolderBase]: For 512613/512621 co-relation queries the response was YES. [2024-06-03 20:49:27,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47816 conditions, 7112 events. 4155/7112 cut-off events. For 512613/512621 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 50749 event pairs, 1431 based on Foata normal form. 15/7123 useless extension candidates. Maximal degree in co-relation 47705. Up to 5975 conditions per place. [2024-06-03 20:49:27,087 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 182 selfloop transitions, 152 changer transitions 0/340 dead transitions. [2024-06-03 20:49:27,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 340 transitions, 5337 flow [2024-06-03 20:49:27,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:27,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 20:49:27,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-03 20:49:27,088 INFO L175 Difference]: Start difference. First operand has 221 places, 317 transitions, 4409 flow. Second operand 8 states and 185 transitions. [2024-06-03 20:49:27,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 340 transitions, 5337 flow [2024-06-03 20:49:27,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 340 transitions, 4981 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-03 20:49:27,859 INFO L231 Difference]: Finished difference. Result has 222 places, 320 transitions, 4446 flow [2024-06-03 20:49:27,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4053, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4446, PETRI_PLACES=222, PETRI_TRANSITIONS=320} [2024-06-03 20:49:27,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-03 20:49:27,859 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 320 transitions, 4446 flow [2024-06-03 20:49:27,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:27,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:27,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:27,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:49:27,860 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:27,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:27,860 INFO L85 PathProgramCache]: Analyzing trace with hash 4620966, now seen corresponding path program 3 times [2024-06-03 20:49:27,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:27,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561145745] [2024-06-03 20:49:27,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:27,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:27,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:27,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:27,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561145745] [2024-06-03 20:49:27,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561145745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:27,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:27,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:27,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685916175] [2024-06-03 20:49:27,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:27,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:27,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:27,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:27,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:28,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:28,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 320 transitions, 4446 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:28,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:28,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:28,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:29,052 INFO L124 PetriNetUnfolderBase]: 4199/7180 cut-off events. [2024-06-03 20:49:29,052 INFO L125 PetriNetUnfolderBase]: For 526234/526242 co-relation queries the response was YES. [2024-06-03 20:49:29,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48104 conditions, 7180 events. 4199/7180 cut-off events. For 526234/526242 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 51216 event pairs, 1441 based on Foata normal form. 15/7191 useless extension candidates. Maximal degree in co-relation 47992. Up to 6043 conditions per place. [2024-06-03 20:49:29,123 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 145 changer transitions 0/343 dead transitions. [2024-06-03 20:49:29,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 343 transitions, 5388 flow [2024-06-03 20:49:29,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 20:49:29,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:49:29,125 INFO L175 Difference]: Start difference. First operand has 222 places, 320 transitions, 4446 flow. Second operand 8 states and 184 transitions. [2024-06-03 20:49:29,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 343 transitions, 5388 flow [2024-06-03 20:49:29,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 343 transitions, 5023 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:29,985 INFO L231 Difference]: Finished difference. Result has 224 places, 323 transitions, 4466 flow [2024-06-03 20:49:29,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4081, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4466, PETRI_PLACES=224, PETRI_TRANSITIONS=323} [2024-06-03 20:49:29,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-03 20:49:29,986 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 323 transitions, 4466 flow [2024-06-03 20:49:29,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:29,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:29,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:29,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:49:29,986 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:29,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:29,987 INFO L85 PathProgramCache]: Analyzing trace with hash 241092996, now seen corresponding path program 4 times [2024-06-03 20:49:29,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:29,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23940652] [2024-06-03 20:49:29,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:29,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:30,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:30,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23940652] [2024-06-03 20:49:30,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23940652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:30,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:30,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:30,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341866376] [2024-06-03 20:49:30,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:30,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:30,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:30,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:30,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:30,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:30,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 323 transitions, 4466 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:30,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:30,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:30,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:31,317 INFO L124 PetriNetUnfolderBase]: 4459/7590 cut-off events. [2024-06-03 20:49:31,317 INFO L125 PetriNetUnfolderBase]: For 631223/631231 co-relation queries the response was YES. [2024-06-03 20:49:31,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52780 conditions, 7590 events. 4459/7590 cut-off events. For 631223/631231 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 54401 event pairs, 1521 based on Foata normal form. 15/7601 useless extension candidates. Maximal degree in co-relation 52667. Up to 5704 conditions per place. [2024-06-03 20:49:31,390 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 157 changer transitions 0/355 dead transitions. [2024-06-03 20:49:31,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 355 transitions, 5648 flow [2024-06-03 20:49:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:49:31,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-03 20:49:31,391 INFO L175 Difference]: Start difference. First operand has 224 places, 323 transitions, 4466 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:49:31,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 355 transitions, 5648 flow [2024-06-03 20:49:32,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 355 transitions, 5291 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:32,587 INFO L231 Difference]: Finished difference. Result has 227 places, 328 transitions, 4600 flow [2024-06-03 20:49:32,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4109, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4600, PETRI_PLACES=227, PETRI_TRANSITIONS=328} [2024-06-03 20:49:32,588 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-03 20:49:32,588 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 328 transitions, 4600 flow [2024-06-03 20:49:32,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:32,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:32,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:32,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:49:32,588 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:32,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:32,589 INFO L85 PathProgramCache]: Analyzing trace with hash 388588660, now seen corresponding path program 1 times [2024-06-03 20:49:32,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:32,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139118834] [2024-06-03 20:49:32,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:32,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:32,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:32,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:32,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139118834] [2024-06-03 20:49:32,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139118834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:32,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:32,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:32,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750984137] [2024-06-03 20:49:32,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:32,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:32,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:32,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:32,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:32,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:32,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 328 transitions, 4600 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:32,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:32,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:32,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:34,074 INFO L124 PetriNetUnfolderBase]: 4992/8498 cut-off events. [2024-06-03 20:49:34,074 INFO L125 PetriNetUnfolderBase]: For 903004/903014 co-relation queries the response was YES. [2024-06-03 20:49:34,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62443 conditions, 8498 events. 4992/8498 cut-off events. For 903004/903014 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 62354 event pairs, 1654 based on Foata normal form. 44/8539 useless extension candidates. Maximal degree in co-relation 62328. Up to 6554 conditions per place. [2024-06-03 20:49:34,162 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 328 selfloop transitions, 39 changer transitions 9/382 dead transitions. [2024-06-03 20:49:34,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 382 transitions, 6003 flow [2024-06-03 20:49:34,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:34,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:34,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 20:49:34,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-03 20:49:34,163 INFO L175 Difference]: Start difference. First operand has 227 places, 328 transitions, 4600 flow. Second operand 8 states and 197 transitions. [2024-06-03 20:49:34,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 382 transitions, 6003 flow [2024-06-03 20:49:35,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 382 transitions, 5541 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:35,367 INFO L231 Difference]: Finished difference. Result has 231 places, 335 transitions, 4444 flow [2024-06-03 20:49:35,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4175, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4444, PETRI_PLACES=231, PETRI_TRANSITIONS=335} [2024-06-03 20:49:35,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-03 20:49:35,367 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 335 transitions, 4444 flow [2024-06-03 20:49:35,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:35,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:35,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:35,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:49:35,368 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:35,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash 372845572, now seen corresponding path program 2 times [2024-06-03 20:49:35,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:35,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565013381] [2024-06-03 20:49:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:35,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:35,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:35,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565013381] [2024-06-03 20:49:35,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565013381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:35,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:35,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:35,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753437617] [2024-06-03 20:49:35,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:35,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:35,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:35,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:35,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:35,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 335 transitions, 4444 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:35,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:35,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:35,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:36,940 INFO L124 PetriNetUnfolderBase]: 5066/8651 cut-off events. [2024-06-03 20:49:36,940 INFO L125 PetriNetUnfolderBase]: For 1009610/1009617 co-relation queries the response was YES. [2024-06-03 20:49:37,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62624 conditions, 8651 events. 5066/8651 cut-off events. For 1009610/1009617 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 64235 event pairs, 1789 based on Foata normal form. 66/8714 useless extension candidates. Maximal degree in co-relation 62507. Up to 6574 conditions per place. [2024-06-03 20:49:37,028 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 216 selfloop transitions, 145 changer transitions 9/376 dead transitions. [2024-06-03 20:49:37,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 376 transitions, 5619 flow [2024-06-03 20:49:37,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:37,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-03 20:49:37,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907859078590786 [2024-06-03 20:49:37,034 INFO L175 Difference]: Start difference. First operand has 231 places, 335 transitions, 4444 flow. Second operand 9 states and 218 transitions. [2024-06-03 20:49:37,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 376 transitions, 5619 flow [2024-06-03 20:49:38,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 376 transitions, 5542 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 20:49:38,766 INFO L231 Difference]: Finished difference. Result has 238 places, 331 transitions, 4603 flow [2024-06-03 20:49:38,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4367, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4603, PETRI_PLACES=238, PETRI_TRANSITIONS=331} [2024-06-03 20:49:38,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-03 20:49:38,767 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 331 transitions, 4603 flow [2024-06-03 20:49:38,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:38,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:38,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:38,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:49:38,767 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:38,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:38,767 INFO L85 PathProgramCache]: Analyzing trace with hash 373172002, now seen corresponding path program 3 times [2024-06-03 20:49:38,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:38,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333914063] [2024-06-03 20:49:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:38,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:38,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:38,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333914063] [2024-06-03 20:49:38,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333914063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:38,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:38,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:38,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567364899] [2024-06-03 20:49:38,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:38,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:38,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:38,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:38,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:38,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:38,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 331 transitions, 4603 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:38,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:38,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:38,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:40,186 INFO L124 PetriNetUnfolderBase]: 4794/8210 cut-off events. [2024-06-03 20:49:40,186 INFO L125 PetriNetUnfolderBase]: For 892319/892326 co-relation queries the response was YES. [2024-06-03 20:49:40,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57150 conditions, 8210 events. 4794/8210 cut-off events. For 892319/892326 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 60499 event pairs, 1748 based on Foata normal form. 74/8281 useless extension candidates. Maximal degree in co-relation 57030. Up to 6736 conditions per place. [2024-06-03 20:49:40,273 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 133 changer transitions 12/363 dead transitions. [2024-06-03 20:49:40,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 363 transitions, 5547 flow [2024-06-03 20:49:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:49:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:49:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-03 20:49:40,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-03 20:49:40,274 INFO L175 Difference]: Start difference. First operand has 238 places, 331 transitions, 4603 flow. Second operand 9 states and 211 transitions. [2024-06-03 20:49:40,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 363 transitions, 5547 flow [2024-06-03 20:49:41,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 363 transitions, 5210 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:41,746 INFO L231 Difference]: Finished difference. Result has 241 places, 321 transitions, 4401 flow [2024-06-03 20:49:41,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4266, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4401, PETRI_PLACES=241, PETRI_TRANSITIONS=321} [2024-06-03 20:49:41,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-03 20:49:41,747 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 321 transitions, 4401 flow [2024-06-03 20:49:41,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:41,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:41,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:41,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:49:41,747 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:41,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:41,748 INFO L85 PathProgramCache]: Analyzing trace with hash 687469400, now seen corresponding path program 4 times [2024-06-03 20:49:41,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:41,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634556471] [2024-06-03 20:49:41,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:41,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:41,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:41,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:41,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:41,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634556471] [2024-06-03 20:49:41,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634556471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:41,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:41,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:41,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431949367] [2024-06-03 20:49:41,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:41,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:41,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:41,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:41,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:41,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:41,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 321 transitions, 4401 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:41,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:41,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:41,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:43,101 INFO L124 PetriNetUnfolderBase]: 4629/7895 cut-off events. [2024-06-03 20:49:43,102 INFO L125 PetriNetUnfolderBase]: For 847951/847956 co-relation queries the response was YES. [2024-06-03 20:49:43,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55932 conditions, 7895 events. 4629/7895 cut-off events. For 847951/847956 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 57456 event pairs, 1687 based on Foata normal form. 44/7935 useless extension candidates. Maximal degree in co-relation 55811. Up to 6608 conditions per place. [2024-06-03 20:49:43,184 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 141 changer transitions 3/345 dead transitions. [2024-06-03 20:49:43,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 345 transitions, 5322 flow [2024-06-03 20:49:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:43,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:43,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:49:43,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-03 20:49:43,185 INFO L175 Difference]: Start difference. First operand has 241 places, 321 transitions, 4401 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:49:43,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 345 transitions, 5322 flow [2024-06-03 20:49:44,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 345 transitions, 5032 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:49:44,457 INFO L231 Difference]: Finished difference. Result has 240 places, 322 transitions, 4425 flow [2024-06-03 20:49:44,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4111, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4425, PETRI_PLACES=240, PETRI_TRANSITIONS=322} [2024-06-03 20:49:44,458 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-03 20:49:44,458 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 322 transitions, 4425 flow [2024-06-03 20:49:44,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:44,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:44,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:44,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:49:44,458 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:44,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:44,458 INFO L85 PathProgramCache]: Analyzing trace with hash 676744640, now seen corresponding path program 5 times [2024-06-03 20:49:44,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:44,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883788498] [2024-06-03 20:49:44,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:44,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:44,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:44,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:44,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883788498] [2024-06-03 20:49:44,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883788498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:44,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:44,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:44,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523753355] [2024-06-03 20:49:44,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:44,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:44,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:44,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:44,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:44,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 322 transitions, 4425 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:44,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:44,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:44,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:45,873 INFO L124 PetriNetUnfolderBase]: 4709/8055 cut-off events. [2024-06-03 20:49:45,874 INFO L125 PetriNetUnfolderBase]: For 856064/856069 co-relation queries the response was YES. [2024-06-03 20:49:45,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56359 conditions, 8055 events. 4709/8055 cut-off events. For 856064/856069 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59079 event pairs, 1741 based on Foata normal form. 44/8095 useless extension candidates. Maximal degree in co-relation 56237. Up to 6748 conditions per place. [2024-06-03 20:49:45,965 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 133 changer transitions 4/346 dead transitions. [2024-06-03 20:49:45,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 346 transitions, 5354 flow [2024-06-03 20:49:45,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:45,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 20:49:45,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-03 20:49:45,966 INFO L175 Difference]: Start difference. First operand has 240 places, 322 transitions, 4425 flow. Second operand 8 states and 185 transitions. [2024-06-03 20:49:45,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 346 transitions, 5354 flow [2024-06-03 20:49:47,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 346 transitions, 5052 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:47,362 INFO L231 Difference]: Finished difference. Result has 242 places, 322 transitions, 4415 flow [2024-06-03 20:49:47,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4123, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4415, PETRI_PLACES=242, PETRI_TRANSITIONS=322} [2024-06-03 20:49:47,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-03 20:49:47,362 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 322 transitions, 4415 flow [2024-06-03 20:49:47,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:47,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:47,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:47,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:49:47,363 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:47,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:47,363 INFO L85 PathProgramCache]: Analyzing trace with hash 676418210, now seen corresponding path program 6 times [2024-06-03 20:49:47,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:47,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541455511] [2024-06-03 20:49:47,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:47,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:47,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:47,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541455511] [2024-06-03 20:49:47,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541455511] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:47,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:47,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:47,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534490815] [2024-06-03 20:49:47,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:47,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:47,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:47,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:47,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:47,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:47,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 322 transitions, 4415 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:47,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:47,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:47,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:48,810 INFO L124 PetriNetUnfolderBase]: 4792/8206 cut-off events. [2024-06-03 20:49:48,810 INFO L125 PetriNetUnfolderBase]: For 858637/858642 co-relation queries the response was YES. [2024-06-03 20:49:48,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56928 conditions, 8206 events. 4792/8206 cut-off events. For 858637/858642 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 60394 event pairs, 1712 based on Foata normal form. 38/8236 useless extension candidates. Maximal degree in co-relation 56805. Up to 6231 conditions per place. [2024-06-03 20:49:48,899 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 200 selfloop transitions, 137 changer transitions 9/352 dead transitions. [2024-06-03 20:49:48,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 352 transitions, 5395 flow [2024-06-03 20:49:48,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:48,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:48,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 20:49:48,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-03 20:49:48,900 INFO L175 Difference]: Start difference. First operand has 242 places, 322 transitions, 4415 flow. Second operand 8 states and 189 transitions. [2024-06-03 20:49:48,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 352 transitions, 5395 flow [2024-06-03 20:49:50,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 352 transitions, 5105 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:50,417 INFO L231 Difference]: Finished difference. Result has 244 places, 320 transitions, 4390 flow [2024-06-03 20:49:50,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4125, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4390, PETRI_PLACES=244, PETRI_TRANSITIONS=320} [2024-06-03 20:49:50,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-03 20:49:50,418 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 320 transitions, 4390 flow [2024-06-03 20:49:50,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:50,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:50,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:50,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:49:50,418 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)] === [2024-06-03 20:49:50,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:50,419 INFO L85 PathProgramCache]: Analyzing trace with hash 687869114, now seen corresponding path program 1 times [2024-06-03 20:49:50,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:50,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353835030] [2024-06-03 20:49:50,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:50,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:50,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:50,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353835030] [2024-06-03 20:49:50,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353835030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:50,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:50,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:49:50,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422153995] [2024-06-03 20:49:50,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:50,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:49:50,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:50,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:49:50,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:49:50,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:50,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 320 transitions, 4390 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:50,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:50,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:50,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:51,841 INFO L124 PetriNetUnfolderBase]: 4659/8005 cut-off events. [2024-06-03 20:49:51,841 INFO L125 PetriNetUnfolderBase]: For 781262/781267 co-relation queries the response was YES. [2024-06-03 20:49:51,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53701 conditions, 8005 events. 4659/8005 cut-off events. For 781262/781267 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 58727 event pairs, 1636 based on Foata normal form. 38/8039 useless extension candidates. Maximal degree in co-relation 53577. Up to 5824 conditions per place. [2024-06-03 20:49:51,919 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 146 changer transitions 4/348 dead transitions. [2024-06-03 20:49:51,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 348 transitions, 5312 flow [2024-06-03 20:49:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:49:51,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-03 20:49:51,924 INFO L175 Difference]: Start difference. First operand has 244 places, 320 transitions, 4390 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:49:51,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 348 transitions, 5312 flow [2024-06-03 20:49:53,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 348 transitions, 4980 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 20:49:53,416 INFO L231 Difference]: Finished difference. Result has 246 places, 319 transitions, 4346 flow [2024-06-03 20:49:53,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4058, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4346, PETRI_PLACES=246, PETRI_TRANSITIONS=319} [2024-06-03 20:49:53,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-03 20:49:53,416 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 319 transitions, 4346 flow [2024-06-03 20:49:53,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:53,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:53,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:53,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:49:53,417 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)] === [2024-06-03 20:49:53,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:53,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1559063686, now seen corresponding path program 2 times [2024-06-03 20:49:53,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:53,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910879127] [2024-06-03 20:49:53,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:53,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:53,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:53,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910879127] [2024-06-03 20:49:53,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910879127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:53,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:53,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:53,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428012839] [2024-06-03 20:49:53,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:53,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:53,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:53,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:53,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:53,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:53,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 319 transitions, 4346 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:53,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:53,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:53,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:54,783 INFO L124 PetriNetUnfolderBase]: 4794/8218 cut-off events. [2024-06-03 20:49:54,784 INFO L125 PetriNetUnfolderBase]: For 797618/797623 co-relation queries the response was YES. [2024-06-03 20:49:54,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54790 conditions, 8218 events. 4794/8218 cut-off events. For 797618/797623 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 60595 event pairs, 1650 based on Foata normal form. 44/8250 useless extension candidates. Maximal degree in co-relation 54665. Up to 6387 conditions per place. [2024-06-03 20:49:54,872 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 216 selfloop transitions, 136 changer transitions 0/358 dead transitions. [2024-06-03 20:49:54,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 358 transitions, 5696 flow [2024-06-03 20:49:54,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:54,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-03 20:49:54,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-03 20:49:54,873 INFO L175 Difference]: Start difference. First operand has 246 places, 319 transitions, 4346 flow. Second operand 8 states and 193 transitions. [2024-06-03 20:49:54,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 358 transitions, 5696 flow [2024-06-03 20:49:56,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 358 transitions, 5336 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-03 20:49:56,289 INFO L231 Difference]: Finished difference. Result has 246 places, 329 transitions, 4558 flow [2024-06-03 20:49:56,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3986, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4558, PETRI_PLACES=246, PETRI_TRANSITIONS=329} [2024-06-03 20:49:56,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-03 20:49:56,289 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 329 transitions, 4558 flow [2024-06-03 20:49:56,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:56,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:56,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:56,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:49:56,290 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:49:56,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:56,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1116234886, now seen corresponding path program 3 times [2024-06-03 20:49:56,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:56,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875305354] [2024-06-03 20:49:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:56,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:56,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:56,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:56,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875305354] [2024-06-03 20:49:56,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875305354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:56,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:56,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:56,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92126043] [2024-06-03 20:49:56,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:56,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:56,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:56,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:56,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:56,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:56,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 329 transitions, 4558 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:56,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:56,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:56,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:49:57,844 INFO L124 PetriNetUnfolderBase]: 5348/9172 cut-off events. [2024-06-03 20:49:57,844 INFO L125 PetriNetUnfolderBase]: For 1037793/1037798 co-relation queries the response was YES. [2024-06-03 20:49:57,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66170 conditions, 9172 events. 5348/9172 cut-off events. For 1037793/1037798 co-relation queries the response was YES. Maximal size of possible extension queue 640. Compared 68782 event pairs, 1765 based on Foata normal form. 44/9202 useless extension candidates. Maximal degree in co-relation 66045. Up to 4898 conditions per place. [2024-06-03 20:49:57,945 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 230 selfloop transitions, 143 changer transitions 0/379 dead transitions. [2024-06-03 20:49:57,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 379 transitions, 6273 flow [2024-06-03 20:49:57,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:49:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:49:57,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 20:49:57,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-03 20:49:57,946 INFO L175 Difference]: Start difference. First operand has 246 places, 329 transitions, 4558 flow. Second operand 8 states and 198 transitions. [2024-06-03 20:49:57,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 379 transitions, 6273 flow [2024-06-03 20:49:59,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 379 transitions, 6034 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 20:49:59,722 INFO L231 Difference]: Finished difference. Result has 252 places, 338 transitions, 4939 flow [2024-06-03 20:49:59,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4319, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4939, PETRI_PLACES=252, PETRI_TRANSITIONS=338} [2024-06-03 20:49:59,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-03 20:49:59,723 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 338 transitions, 4939 flow [2024-06-03 20:49:59,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:59,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:49:59,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:49:59,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:49:59,723 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)] === [2024-06-03 20:49:59,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:49:59,724 INFO L85 PathProgramCache]: Analyzing trace with hash 363134312, now seen corresponding path program 1 times [2024-06-03 20:49:59,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:49:59,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561100098] [2024-06-03 20:49:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:49:59,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:49:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:49:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:49:59,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:49:59,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561100098] [2024-06-03 20:49:59,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561100098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:49:59,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:49:59,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:49:59,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101780711] [2024-06-03 20:49:59,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:49:59,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:49:59,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:49:59,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:49:59,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:49:59,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:49:59,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 338 transitions, 4939 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:49:59,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:49:59,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:49:59,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:01,787 INFO L124 PetriNetUnfolderBase]: 6257/10712 cut-off events. [2024-06-03 20:50:01,787 INFO L125 PetriNetUnfolderBase]: For 1431067/1431070 co-relation queries the response was YES. [2024-06-03 20:50:01,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83625 conditions, 10712 events. 6257/10712 cut-off events. For 1431067/1431070 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 83447 event pairs, 1953 based on Foata normal form. 42/10749 useless extension candidates. Maximal degree in co-relation 83496. Up to 7287 conditions per place. [2024-06-03 20:50:01,894 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 329 selfloop transitions, 75 changer transitions 0/410 dead transitions. [2024-06-03 20:50:01,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 410 transitions, 6917 flow [2024-06-03 20:50:01,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:01,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:01,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-03 20:50:01,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:50:01,895 INFO L175 Difference]: Start difference. First operand has 252 places, 338 transitions, 4939 flow. Second operand 8 states and 200 transitions. [2024-06-03 20:50:01,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 410 transitions, 6917 flow [2024-06-03 20:50:04,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 410 transitions, 6411 flow, removed 73 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:04,188 INFO L231 Difference]: Finished difference. Result has 254 places, 354 transitions, 5143 flow [2024-06-03 20:50:04,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4471, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5143, PETRI_PLACES=254, PETRI_TRANSITIONS=354} [2024-06-03 20:50:04,188 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-03 20:50:04,189 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 354 transitions, 5143 flow [2024-06-03 20:50:04,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:04,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:04,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:04,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:50:04,189 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:04,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:04,189 INFO L85 PathProgramCache]: Analyzing trace with hash -204313256, now seen corresponding path program 2 times [2024-06-03 20:50:04,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:04,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238682268] [2024-06-03 20:50:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:04,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:04,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:04,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238682268] [2024-06-03 20:50:04,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238682268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:04,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:04,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:04,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57324003] [2024-06-03 20:50:04,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:04,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:04,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:04,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:04,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:04,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:04,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 354 transitions, 5143 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:04,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:04,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:04,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:06,030 INFO L124 PetriNetUnfolderBase]: 6081/10422 cut-off events. [2024-06-03 20:50:06,031 INFO L125 PetriNetUnfolderBase]: For 1265990/1265993 co-relation queries the response was YES. [2024-06-03 20:50:06,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77090 conditions, 10422 events. 6081/10422 cut-off events. For 1265990/1265993 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 80749 event pairs, 2245 based on Foata normal form. 42/10459 useless extension candidates. Maximal degree in co-relation 76962. Up to 8445 conditions per place. [2024-06-03 20:50:06,170 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 242 selfloop transitions, 150 changer transitions 0/398 dead transitions. [2024-06-03 20:50:06,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 398 transitions, 6601 flow [2024-06-03 20:50:06,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:06,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:06,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-03 20:50:06,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907859078590786 [2024-06-03 20:50:06,171 INFO L175 Difference]: Start difference. First operand has 254 places, 354 transitions, 5143 flow. Second operand 9 states and 218 transitions. [2024-06-03 20:50:06,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 398 transitions, 6601 flow [2024-06-03 20:50:08,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 398 transitions, 6422 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-03 20:50:08,715 INFO L231 Difference]: Finished difference. Result has 261 places, 362 transitions, 5565 flow [2024-06-03 20:50:08,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4964, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5565, PETRI_PLACES=261, PETRI_TRANSITIONS=362} [2024-06-03 20:50:08,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-03 20:50:08,715 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 362 transitions, 5565 flow [2024-06-03 20:50:08,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:08,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:08,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:08,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:50:08,716 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:08,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:08,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1727220486, now seen corresponding path program 3 times [2024-06-03 20:50:08,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:08,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903816308] [2024-06-03 20:50:08,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:08,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:08,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:08,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903816308] [2024-06-03 20:50:08,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903816308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:08,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:08,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:08,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652288677] [2024-06-03 20:50:08,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:08,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:08,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:08,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:08,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:08,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:08,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 362 transitions, 5565 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:08,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:08,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:08,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:10,673 INFO L124 PetriNetUnfolderBase]: 6297/10875 cut-off events. [2024-06-03 20:50:10,673 INFO L125 PetriNetUnfolderBase]: For 1393901/1393904 co-relation queries the response was YES. [2024-06-03 20:50:10,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78963 conditions, 10875 events. 6297/10875 cut-off events. For 1393901/1393904 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 85734 event pairs, 2161 based on Foata normal form. 72/10942 useless extension candidates. Maximal degree in co-relation 78832. Up to 7885 conditions per place. [2024-06-03 20:50:10,808 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 233 selfloop transitions, 158 changer transitions 7/404 dead transitions. [2024-06-03 20:50:10,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 404 transitions, 6846 flow [2024-06-03 20:50:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:10,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:10,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-03 20:50:10,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-03 20:50:10,809 INFO L175 Difference]: Start difference. First operand has 261 places, 362 transitions, 5565 flow. Second operand 9 states and 219 transitions. [2024-06-03 20:50:10,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 404 transitions, 6846 flow [2024-06-03 20:50:13,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 404 transitions, 6557 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-03 20:50:13,384 INFO L231 Difference]: Finished difference. Result has 265 places, 361 transitions, 5589 flow [2024-06-03 20:50:13,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5276, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5589, PETRI_PLACES=265, PETRI_TRANSITIONS=361} [2024-06-03 20:50:13,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-03 20:50:13,385 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 361 transitions, 5589 flow [2024-06-03 20:50:13,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:13,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:13,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:13,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:50:13,385 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:13,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:13,385 INFO L85 PathProgramCache]: Analyzing trace with hash -788715436, now seen corresponding path program 4 times [2024-06-03 20:50:13,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:13,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634289866] [2024-06-03 20:50:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:13,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:13,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:13,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:13,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:13,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634289866] [2024-06-03 20:50:13,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634289866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:13,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:13,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:13,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895682005] [2024-06-03 20:50:13,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:13,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:13,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:13,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:13,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:13,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:13,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 361 transitions, 5589 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:13,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:13,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:13,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:15,346 INFO L124 PetriNetUnfolderBase]: 6459/11150 cut-off events. [2024-06-03 20:50:15,346 INFO L125 PetriNetUnfolderBase]: For 1465758/1465761 co-relation queries the response was YES. [2024-06-03 20:50:15,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80328 conditions, 11150 events. 6459/11150 cut-off events. For 1465758/1465761 co-relation queries the response was YES. Maximal size of possible extension queue 817. Compared 88346 event pairs, 2589 based on Foata normal form. 84/11229 useless extension candidates. Maximal degree in co-relation 80195. Up to 9472 conditions per place. [2024-06-03 20:50:15,478 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 145 changer transitions 7/393 dead transitions. [2024-06-03 20:50:15,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 393 transitions, 6662 flow [2024-06-03 20:50:15,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:15,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-03 20:50:15,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-03 20:50:15,479 INFO L175 Difference]: Start difference. First operand has 265 places, 361 transitions, 5589 flow. Second operand 9 states and 209 transitions. [2024-06-03 20:50:15,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 393 transitions, 6662 flow [2024-06-03 20:50:18,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 393 transitions, 6369 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:18,396 INFO L231 Difference]: Finished difference. Result has 268 places, 359 transitions, 5572 flow [2024-06-03 20:50:18,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5298, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5572, PETRI_PLACES=268, PETRI_TRANSITIONS=359} [2024-06-03 20:50:18,397 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-03 20:50:18,397 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 359 transitions, 5572 flow [2024-06-03 20:50:18,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:18,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:18,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:18,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:50:18,397 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:18,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:18,398 INFO L85 PathProgramCache]: Analyzing trace with hash -919744032, now seen corresponding path program 5 times [2024-06-03 20:50:18,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:18,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834890363] [2024-06-03 20:50:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:18,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:18,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:18,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834890363] [2024-06-03 20:50:18,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834890363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:18,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:18,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:18,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431768057] [2024-06-03 20:50:18,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:18,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:18,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:18,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:18,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:18,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:18,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 359 transitions, 5572 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:18,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:18,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:18,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:20,347 INFO L124 PetriNetUnfolderBase]: 6408/11085 cut-off events. [2024-06-03 20:50:20,347 INFO L125 PetriNetUnfolderBase]: For 1360557/1360560 co-relation queries the response was YES. [2024-06-03 20:50:20,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76623 conditions, 11085 events. 6408/11085 cut-off events. For 1360557/1360560 co-relation queries the response was YES. Maximal size of possible extension queue 816. Compared 88150 event pairs, 2572 based on Foata normal form. 84/11164 useless extension candidates. Maximal degree in co-relation 76489. Up to 9417 conditions per place. [2024-06-03 20:50:20,471 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 239 selfloop transitions, 140 changer transitions 5/390 dead transitions. [2024-06-03 20:50:20,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 390 transitions, 6622 flow [2024-06-03 20:50:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:20,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-03 20:50:20,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-03 20:50:20,472 INFO L175 Difference]: Start difference. First operand has 268 places, 359 transitions, 5572 flow. Second operand 9 states and 209 transitions. [2024-06-03 20:50:20,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 390 transitions, 6622 flow [2024-06-03 20:50:22,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 390 transitions, 6289 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:22,842 INFO L231 Difference]: Finished difference. Result has 269 places, 358 transitions, 5505 flow [2024-06-03 20:50:22,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5239, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5505, PETRI_PLACES=269, PETRI_TRANSITIONS=358} [2024-06-03 20:50:22,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-03 20:50:22,843 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 358 transitions, 5505 flow [2024-06-03 20:50:22,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:22,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:22,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:22,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:50:22,843 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:22,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash -919528830, now seen corresponding path program 1 times [2024-06-03 20:50:22,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:22,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908526290] [2024-06-03 20:50:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:22,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:22,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:22,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:22,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908526290] [2024-06-03 20:50:22,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908526290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:22,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:22,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:22,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868869884] [2024-06-03 20:50:22,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:22,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:22,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:22,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:22,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:23,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:23,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 358 transitions, 5505 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:23,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:23,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:23,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:24,988 INFO L124 PetriNetUnfolderBase]: 6478/11275 cut-off events. [2024-06-03 20:50:24,988 INFO L125 PetriNetUnfolderBase]: For 1315337/1315340 co-relation queries the response was YES. [2024-06-03 20:50:25,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76422 conditions, 11275 events. 6478/11275 cut-off events. For 1315337/1315340 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 90423 event pairs, 2514 based on Foata normal form. 72/11342 useless extension candidates. Maximal degree in co-relation 76288. Up to 8649 conditions per place. [2024-06-03 20:50:25,105 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 236 selfloop transitions, 147 changer transitions 7/396 dead transitions. [2024-06-03 20:50:25,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 396 transitions, 6676 flow [2024-06-03 20:50:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:25,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:25,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-03 20:50:25,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-03 20:50:25,106 INFO L175 Difference]: Start difference. First operand has 269 places, 358 transitions, 5505 flow. Second operand 9 states and 214 transitions. [2024-06-03 20:50:25,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 396 transitions, 6676 flow [2024-06-03 20:50:27,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 396 transitions, 6378 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:50:27,661 INFO L231 Difference]: Finished difference. Result has 271 places, 359 transitions, 5592 flow [2024-06-03 20:50:27,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5207, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5592, PETRI_PLACES=271, PETRI_TRANSITIONS=359} [2024-06-03 20:50:27,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-03 20:50:27,662 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 359 transitions, 5592 flow [2024-06-03 20:50:27,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:27,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:27,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:27,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:50:27,662 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:27,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:27,663 INFO L85 PathProgramCache]: Analyzing trace with hash 242107168, now seen corresponding path program 6 times [2024-06-03 20:50:27,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:27,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407969865] [2024-06-03 20:50:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:27,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:27,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:27,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:27,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407969865] [2024-06-03 20:50:27,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407969865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:27,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:27,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014683840] [2024-06-03 20:50:27,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:27,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:27,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:27,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:27,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:27,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 359 transitions, 5592 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:27,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:27,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:27,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:29,582 INFO L124 PetriNetUnfolderBase]: 6289/10973 cut-off events. [2024-06-03 20:50:29,582 INFO L125 PetriNetUnfolderBase]: For 1098317/1098322 co-relation queries the response was YES. [2024-06-03 20:50:29,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72234 conditions, 10973 events. 6289/10973 cut-off events. For 1098317/1098322 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 87975 event pairs, 2563 based on Foata normal form. 44/11013 useless extension candidates. Maximal degree in co-relation 72099. Up to 9470 conditions per place. [2024-06-03 20:50:29,715 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 252 selfloop transitions, 119 changer transitions 4/381 dead transitions. [2024-06-03 20:50:29,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 381 transitions, 6572 flow [2024-06-03 20:50:29,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:29,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:29,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 20:50:29,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:50:29,716 INFO L175 Difference]: Start difference. First operand has 271 places, 359 transitions, 5592 flow. Second operand 8 states and 184 transitions. [2024-06-03 20:50:29,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 381 transitions, 6572 flow [2024-06-03 20:50:32,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 381 transitions, 6175 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-03 20:50:32,059 INFO L231 Difference]: Finished difference. Result has 272 places, 357 transitions, 5403 flow [2024-06-03 20:50:32,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5195, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5403, PETRI_PLACES=272, PETRI_TRANSITIONS=357} [2024-06-03 20:50:32,059 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-03 20:50:32,059 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 357 transitions, 5403 flow [2024-06-03 20:50:32,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:32,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:32,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:32,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:50:32,060 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:32,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:32,060 INFO L85 PathProgramCache]: Analyzing trace with hash 242322370, now seen corresponding path program 2 times [2024-06-03 20:50:32,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:32,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271108542] [2024-06-03 20:50:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:32,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:32,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:32,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271108542] [2024-06-03 20:50:32,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271108542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:32,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:32,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:32,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343095234] [2024-06-03 20:50:32,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:32,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:32,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:32,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:32,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:32,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:32,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 357 transitions, 5403 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:32,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:32,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:32,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:33,964 INFO L124 PetriNetUnfolderBase]: 6275/10977 cut-off events. [2024-06-03 20:50:33,964 INFO L125 PetriNetUnfolderBase]: For 1094214/1094219 co-relation queries the response was YES. [2024-06-03 20:50:34,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71679 conditions, 10977 events. 6275/10977 cut-off events. For 1094214/1094219 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 88104 event pairs, 2515 based on Foata normal form. 38/11011 useless extension candidates. Maximal degree in co-relation 71543. Up to 9250 conditions per place. [2024-06-03 20:50:34,096 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 253 selfloop transitions, 119 changer transitions 9/387 dead transitions. [2024-06-03 20:50:34,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 387 transitions, 6503 flow [2024-06-03 20:50:34,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:34,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:34,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 20:50:34,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-03 20:50:34,096 INFO L175 Difference]: Start difference. First operand has 272 places, 357 transitions, 5403 flow. Second operand 8 states and 190 transitions. [2024-06-03 20:50:34,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 387 transitions, 6503 flow [2024-06-03 20:50:36,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 387 transitions, 6163 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 20:50:36,383 INFO L231 Difference]: Finished difference. Result has 272 places, 355 transitions, 5345 flow [2024-06-03 20:50:36,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5063, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5345, PETRI_PLACES=272, PETRI_TRANSITIONS=355} [2024-06-03 20:50:36,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-03 20:50:36,384 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 355 transitions, 5345 flow [2024-06-03 20:50:36,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:36,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:36,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:36,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:50:36,384 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:36,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:36,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1116050188, now seen corresponding path program 3 times [2024-06-03 20:50:36,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:36,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592808801] [2024-06-03 20:50:36,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:36,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:36,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:36,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:36,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:36,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592808801] [2024-06-03 20:50:36,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592808801] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:36,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:36,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:36,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465310252] [2024-06-03 20:50:36,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:36,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:36,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:36,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:36,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:36,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:36,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 355 transitions, 5345 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:36,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:36,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:36,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:38,837 INFO L124 PetriNetUnfolderBase]: 6299/11019 cut-off events. [2024-06-03 20:50:38,837 INFO L125 PetriNetUnfolderBase]: For 1192791/1192796 co-relation queries the response was YES. [2024-06-03 20:50:38,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73478 conditions, 11019 events. 6299/11019 cut-off events. For 1192791/1192796 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 88148 event pairs, 2447 based on Foata normal form. 38/11053 useless extension candidates. Maximal degree in co-relation 73341. Up to 7041 conditions per place. [2024-06-03 20:50:38,947 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 122 changer transitions 12/389 dead transitions. [2024-06-03 20:50:38,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 389 transitions, 6607 flow [2024-06-03 20:50:38,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:38,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:38,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-03 20:50:38,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-03 20:50:38,948 INFO L175 Difference]: Start difference. First operand has 272 places, 355 transitions, 5345 flow. Second operand 8 states and 193 transitions. [2024-06-03 20:50:38,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 389 transitions, 6607 flow [2024-06-03 20:50:41,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 389 transitions, 6296 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:41,378 INFO L231 Difference]: Finished difference. Result has 274 places, 350 transitions, 5296 flow [2024-06-03 20:50:41,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5034, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5296, PETRI_PLACES=274, PETRI_TRANSITIONS=350} [2024-06-03 20:50:41,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-03 20:50:41,379 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 350 transitions, 5296 flow [2024-06-03 20:50:41,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:41,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:41,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:41,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:50:41,379 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:41,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:41,380 INFO L85 PathProgramCache]: Analyzing trace with hash -838867009, now seen corresponding path program 1 times [2024-06-03 20:50:41,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:41,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995626608] [2024-06-03 20:50:41,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:41,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:41,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:41,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:41,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:41,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995626608] [2024-06-03 20:50:41,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995626608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:41,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:41,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:50:41,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768418303] [2024-06-03 20:50:41,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:41,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:50:41,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:41,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:50:41,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:50:41,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:41,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 350 transitions, 5296 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:41,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:41,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:41,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:43,726 INFO L124 PetriNetUnfolderBase]: 6433/11221 cut-off events. [2024-06-03 20:50:43,726 INFO L125 PetriNetUnfolderBase]: For 1187211/1187213 co-relation queries the response was YES. [2024-06-03 20:50:43,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77335 conditions, 11221 events. 6433/11221 cut-off events. For 1187211/1187213 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 90137 event pairs, 2120 based on Foata normal form. 10/11171 useless extension candidates. Maximal degree in co-relation 77197. Up to 8893 conditions per place. [2024-06-03 20:50:43,946 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 331 selfloop transitions, 71 changer transitions 1/409 dead transitions. [2024-06-03 20:50:43,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 409 transitions, 6962 flow [2024-06-03 20:50:43,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:50:43,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:50:43,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 20:50:43,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-03 20:50:43,947 INFO L175 Difference]: Start difference. First operand has 274 places, 350 transitions, 5296 flow. Second operand 8 states and 194 transitions. [2024-06-03 20:50:43,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 409 transitions, 6962 flow [2024-06-03 20:50:46,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 409 transitions, 6415 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-03 20:50:46,117 INFO L231 Difference]: Finished difference. Result has 274 places, 364 transitions, 5250 flow [2024-06-03 20:50:46,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4752, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5250, PETRI_PLACES=274, PETRI_TRANSITIONS=364} [2024-06-03 20:50:46,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-03 20:50:46,117 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 364 transitions, 5250 flow [2024-06-03 20:50:46,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:46,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:46,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:46,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:50:46,118 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:50:46,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:46,118 INFO L85 PathProgramCache]: Analyzing trace with hash 498134191, now seen corresponding path program 2 times [2024-06-03 20:50:46,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:46,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054450787] [2024-06-03 20:50:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:46,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:46,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:46,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:46,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054450787] [2024-06-03 20:50:46,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054450787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:46,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:46,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004754899] [2024-06-03 20:50:46,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:46,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:46,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:46,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:46,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:46,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:46,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 364 transitions, 5250 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:46,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:46,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:46,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:48,377 INFO L124 PetriNetUnfolderBase]: 6301/10991 cut-off events. [2024-06-03 20:50:48,377 INFO L125 PetriNetUnfolderBase]: For 1079854/1079856 co-relation queries the response was YES. [2024-06-03 20:50:48,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73973 conditions, 10991 events. 6301/10991 cut-off events. For 1079854/1079856 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 87484 event pairs, 1909 based on Foata normal form. 4/10933 useless extension candidates. Maximal degree in co-relation 73836. Up to 5555 conditions per place. [2024-06-03 20:50:48,510 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 230 selfloop transitions, 176 changer transitions 0/412 dead transitions. [2024-06-03 20:50:48,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 412 transitions, 6943 flow [2024-06-03 20:50:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:50:48,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:50:48,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-03 20:50:48,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2024-06-03 20:50:48,512 INFO L175 Difference]: Start difference. First operand has 274 places, 364 transitions, 5250 flow. Second operand 9 states and 221 transitions. [2024-06-03 20:50:48,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 412 transitions, 6943 flow [2024-06-03 20:50:50,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 412 transitions, 6817 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 20:50:50,863 INFO L231 Difference]: Finished difference. Result has 279 places, 367 transitions, 5586 flow [2024-06-03 20:50:50,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5128, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5586, PETRI_PLACES=279, PETRI_TRANSITIONS=367} [2024-06-03 20:50:50,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-03 20:50:50,864 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 367 transitions, 5586 flow [2024-06-03 20:50:50,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:50,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:50,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:50,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:50:50,865 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)] === [2024-06-03 20:50:50,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:50,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1057008465, now seen corresponding path program 3 times [2024-06-03 20:50:50,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:50,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644351110] [2024-06-03 20:50:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:50,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:51,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:51,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644351110] [2024-06-03 20:50:51,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644351110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:51,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:51,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:51,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279094398] [2024-06-03 20:50:51,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:51,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:51,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:51,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:51,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:51,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:51,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 367 transitions, 5586 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:51,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:51,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:51,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:53,201 INFO L124 PetriNetUnfolderBase]: 6244/10847 cut-off events. [2024-06-03 20:50:53,202 INFO L125 PetriNetUnfolderBase]: For 1101438/1101440 co-relation queries the response was YES. [2024-06-03 20:50:53,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73242 conditions, 10847 events. 6244/10847 cut-off events. For 1101438/1101440 co-relation queries the response was YES. Maximal size of possible extension queue 814. Compared 86357 event pairs, 2290 based on Foata normal form. 14/10805 useless extension candidates. Maximal degree in co-relation 73104. Up to 8684 conditions per place. [2024-06-03 20:50:53,314 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 259 selfloop transitions, 144 changer transitions 5/414 dead transitions. [2024-06-03 20:50:53,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 414 transitions, 6892 flow [2024-06-03 20:50:53,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:53,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:53,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-03 20:50:53,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 20:50:53,315 INFO L175 Difference]: Start difference. First operand has 279 places, 367 transitions, 5586 flow. Second operand 10 states and 246 transitions. [2024-06-03 20:50:53,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 414 transitions, 6892 flow [2024-06-03 20:50:55,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 414 transitions, 6554 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 20:50:55,397 INFO L231 Difference]: Finished difference. Result has 283 places, 364 transitions, 5490 flow [2024-06-03 20:50:55,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5248, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5490, PETRI_PLACES=283, PETRI_TRANSITIONS=364} [2024-06-03 20:50:55,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-03 20:50:55,398 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 364 transitions, 5490 flow [2024-06-03 20:50:55,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:55,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:50:55,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:50:55,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:50:55,398 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)] === [2024-06-03 20:50:55,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:50:55,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1664717595, now seen corresponding path program 4 times [2024-06-03 20:50:55,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:50:55,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852957643] [2024-06-03 20:50:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:50:55,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:50:55,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:50:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:50:55,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:50:55,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852957643] [2024-06-03 20:50:55,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852957643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:50:55,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:50:55,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:50:55,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931927898] [2024-06-03 20:50:55,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:50:55,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:50:55,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:50:55,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:50:55,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:50:55,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:50:55,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 364 transitions, 5490 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:50:55,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:50:55,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:50:55,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:50:57,578 INFO L124 PetriNetUnfolderBase]: 6049/10559 cut-off events. [2024-06-03 20:50:57,579 INFO L125 PetriNetUnfolderBase]: For 1073989/1073991 co-relation queries the response was YES. [2024-06-03 20:50:57,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70241 conditions, 10559 events. 6049/10559 cut-off events. For 1073989/1073991 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 84018 event pairs, 2386 based on Foata normal form. 14/10563 useless extension candidates. Maximal degree in co-relation 70103. Up to 9263 conditions per place. [2024-06-03 20:50:57,700 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 132 changer transitions 2/401 dead transitions. [2024-06-03 20:50:57,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 401 transitions, 6560 flow [2024-06-03 20:50:57,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:50:57,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:50:57,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-03 20:50:57,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780487804878048 [2024-06-03 20:50:57,701 INFO L175 Difference]: Start difference. First operand has 283 places, 364 transitions, 5490 flow. Second operand 10 states and 237 transitions. [2024-06-03 20:50:57,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 401 transitions, 6560 flow [2024-06-03 20:51:00,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 401 transitions, 6257 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:00,304 INFO L231 Difference]: Finished difference. Result has 286 places, 364 transitions, 5458 flow [2024-06-03 20:51:00,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5187, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5458, PETRI_PLACES=286, PETRI_TRANSITIONS=364} [2024-06-03 20:51:00,304 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-03 20:51:00,305 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 364 transitions, 5458 flow [2024-06-03 20:51:00,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:00,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:00,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:00,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:51:00,305 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:00,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:00,306 INFO L85 PathProgramCache]: Analyzing trace with hash 147672239, now seen corresponding path program 5 times [2024-06-03 20:51:00,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:00,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667004521] [2024-06-03 20:51:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:00,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:00,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:00,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:00,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667004521] [2024-06-03 20:51:00,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667004521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:00,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:00,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:00,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865909872] [2024-06-03 20:51:00,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:00,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:00,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:00,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:00,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:00,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:00,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 364 transitions, 5458 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:00,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:00,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:00,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:02,436 INFO L124 PetriNetUnfolderBase]: 6037/10545 cut-off events. [2024-06-03 20:51:02,436 INFO L125 PetriNetUnfolderBase]: For 1047781/1047783 co-relation queries the response was YES. [2024-06-03 20:51:02,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69803 conditions, 10545 events. 6037/10545 cut-off events. For 1047781/1047783 co-relation queries the response was YES. Maximal size of possible extension queue 790. Compared 83968 event pairs, 2390 based on Foata normal form. 4/10543 useless extension candidates. Maximal degree in co-relation 69664. Up to 9281 conditions per place. [2024-06-03 20:51:02,541 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 258 selfloop transitions, 127 changer transitions 0/391 dead transitions. [2024-06-03 20:51:02,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 391 transitions, 6474 flow [2024-06-03 20:51:02,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:02,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-03 20:51:02,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:51:02,542 INFO L175 Difference]: Start difference. First operand has 286 places, 364 transitions, 5458 flow. Second operand 9 states and 207 transitions. [2024-06-03 20:51:02,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 391 transitions, 6474 flow [2024-06-03 20:51:04,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 391 transitions, 6181 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 20:51:04,638 INFO L231 Difference]: Finished difference. Result has 287 places, 364 transitions, 5424 flow [2024-06-03 20:51:04,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5165, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5424, PETRI_PLACES=287, PETRI_TRANSITIONS=364} [2024-06-03 20:51:04,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-03 20:51:04,639 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 364 transitions, 5424 flow [2024-06-03 20:51:04,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:04,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:04,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:04,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:51:04,640 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:04,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:04,640 INFO L85 PathProgramCache]: Analyzing trace with hash 144815279, now seen corresponding path program 6 times [2024-06-03 20:51:04,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:04,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697907410] [2024-06-03 20:51:04,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:04,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:04,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:04,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:04,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:04,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697907410] [2024-06-03 20:51:04,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697907410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:04,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:04,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:04,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210655338] [2024-06-03 20:51:04,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:04,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:04,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:04,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:04,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:04,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:04,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 364 transitions, 5424 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:04,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:04,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:04,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:06,748 INFO L124 PetriNetUnfolderBase]: 6025/10488 cut-off events. [2024-06-03 20:51:06,748 INFO L125 PetriNetUnfolderBase]: For 1058074/1058076 co-relation queries the response was YES. [2024-06-03 20:51:06,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69445 conditions, 10488 events. 6025/10488 cut-off events. For 1058074/1058076 co-relation queries the response was YES. Maximal size of possible extension queue 788. Compared 83081 event pairs, 2351 based on Foata normal form. 4/10465 useless extension candidates. Maximal degree in co-relation 69305. Up to 9059 conditions per place. [2024-06-03 20:51:06,863 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 252 selfloop transitions, 137 changer transitions 1/396 dead transitions. [2024-06-03 20:51:06,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 396 transitions, 6656 flow [2024-06-03 20:51:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:06,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-03 20:51:06,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-03 20:51:06,864 INFO L175 Difference]: Start difference. First operand has 287 places, 364 transitions, 5424 flow. Second operand 9 states and 212 transitions. [2024-06-03 20:51:06,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 396 transitions, 6656 flow [2024-06-03 20:51:09,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 396 transitions, 6361 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:09,195 INFO L231 Difference]: Finished difference. Result has 289 places, 364 transitions, 5409 flow [2024-06-03 20:51:09,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5129, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5409, PETRI_PLACES=289, PETRI_TRANSITIONS=364} [2024-06-03 20:51:09,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-03 20:51:09,196 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 364 transitions, 5409 flow [2024-06-03 20:51:09,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:09,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:09,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:09,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:51:09,196 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:09,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:09,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1922762216, now seen corresponding path program 1 times [2024-06-03 20:51:09,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:09,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919210391] [2024-06-03 20:51:09,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:09,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:09,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:09,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919210391] [2024-06-03 20:51:09,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919210391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:09,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:09,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:51:09,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930285975] [2024-06-03 20:51:09,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:09,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:51:09,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:09,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:51:09,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:51:09,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:09,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 364 transitions, 5409 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:09,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:09,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:09,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:11,309 INFO L124 PetriNetUnfolderBase]: 6043/10566 cut-off events. [2024-06-03 20:51:11,309 INFO L125 PetriNetUnfolderBase]: For 1085088/1085095 co-relation queries the response was YES. [2024-06-03 20:51:11,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70152 conditions, 10566 events. 6043/10566 cut-off events. For 1085088/1085095 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 84162 event pairs, 2413 based on Foata normal form. 8/10571 useless extension candidates. Maximal degree in co-relation 70011. Up to 9288 conditions per place. [2024-06-03 20:51:11,423 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 266 selfloop transitions, 127 changer transitions 0/399 dead transitions. [2024-06-03 20:51:11,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 399 transitions, 6789 flow [2024-06-03 20:51:11,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:11,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:51:11,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-03 20:51:11,424 INFO L175 Difference]: Start difference. First operand has 289 places, 364 transitions, 5409 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:51:11,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 399 transitions, 6789 flow [2024-06-03 20:51:13,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 399 transitions, 6419 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:13,712 INFO L231 Difference]: Finished difference. Result has 290 places, 373 transitions, 5465 flow [2024-06-03 20:51:13,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5057, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5465, PETRI_PLACES=290, PETRI_TRANSITIONS=373} [2024-06-03 20:51:13,713 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-03 20:51:13,713 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 373 transitions, 5465 flow [2024-06-03 20:51:13,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:13,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:13,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:13,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:51:13,713 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:13,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:13,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1380470422, now seen corresponding path program 2 times [2024-06-03 20:51:13,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:13,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46959439] [2024-06-03 20:51:13,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:13,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:13,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:13,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46959439] [2024-06-03 20:51:13,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46959439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:13,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:13,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:13,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806542790] [2024-06-03 20:51:13,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:13,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:13,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:13,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:13,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:13,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:13,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 373 transitions, 5465 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:13,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:13,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:13,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:16,039 INFO L124 PetriNetUnfolderBase]: 6053/10584 cut-off events. [2024-06-03 20:51:16,039 INFO L125 PetriNetUnfolderBase]: For 1104003/1104010 co-relation queries the response was YES. [2024-06-03 20:51:16,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70228 conditions, 10584 events. 6053/10584 cut-off events. For 1104003/1104010 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 84277 event pairs, 2413 based on Foata normal form. 8/10589 useless extension candidates. Maximal degree in co-relation 70086. Up to 9300 conditions per place. [2024-06-03 20:51:16,152 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 268 selfloop transitions, 131 changer transitions 0/405 dead transitions. [2024-06-03 20:51:16,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 405 transitions, 6807 flow [2024-06-03 20:51:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:16,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:16,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:51:16,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-03 20:51:16,153 INFO L175 Difference]: Start difference. First operand has 290 places, 373 transitions, 5465 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:51:16,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 405 transitions, 6807 flow [2024-06-03 20:51:19,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 405 transitions, 6631 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:19,074 INFO L231 Difference]: Finished difference. Result has 294 places, 379 transitions, 5670 flow [2024-06-03 20:51:19,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5295, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5670, PETRI_PLACES=294, PETRI_TRANSITIONS=379} [2024-06-03 20:51:19,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-03 20:51:19,075 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 379 transitions, 5670 flow [2024-06-03 20:51:19,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:19,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:19,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:19,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:51:19,174 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:51:19,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:19,175 INFO L85 PathProgramCache]: Analyzing trace with hash -239292750, now seen corresponding path program 3 times [2024-06-03 20:51:19,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:19,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907318154] [2024-06-03 20:51:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:19,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:19,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:19,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:19,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:19,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907318154] [2024-06-03 20:51:19,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907318154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:19,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:19,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:19,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472470953] [2024-06-03 20:51:19,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:19,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:19,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:19,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:19,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:19,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:19,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 379 transitions, 5670 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:19,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:19,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:19,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:21,224 INFO L124 PetriNetUnfolderBase]: 6050/10572 cut-off events. [2024-06-03 20:51:21,225 INFO L125 PetriNetUnfolderBase]: For 1120332/1120337 co-relation queries the response was YES. [2024-06-03 20:51:21,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70438 conditions, 10572 events. 6050/10572 cut-off events. For 1120332/1120337 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 84191 event pairs, 2420 based on Foata normal form. 3/10571 useless extension candidates. Maximal degree in co-relation 70295. Up to 9297 conditions per place. [2024-06-03 20:51:21,335 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 264 selfloop transitions, 128 changer transitions 0/398 dead transitions. [2024-06-03 20:51:21,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 398 transitions, 6876 flow [2024-06-03 20:51:21,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:21,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:51:21,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 20:51:21,336 INFO L175 Difference]: Start difference. First operand has 294 places, 379 transitions, 5670 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:51:21,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 398 transitions, 6876 flow [2024-06-03 20:51:25,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 398 transitions, 6702 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:51:25,155 INFO L231 Difference]: Finished difference. Result has 297 places, 379 transitions, 5760 flow [2024-06-03 20:51:25,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5496, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5760, PETRI_PLACES=297, PETRI_TRANSITIONS=379} [2024-06-03 20:51:25,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-03 20:51:25,156 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 379 transitions, 5760 flow [2024-06-03 20:51:25,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:25,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:25,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:25,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:51:25,156 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)] === [2024-06-03 20:51:25,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:25,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1093225972, now seen corresponding path program 4 times [2024-06-03 20:51:25,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:25,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127846090] [2024-06-03 20:51:25,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:25,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:25,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:25,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127846090] [2024-06-03 20:51:25,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127846090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:25,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:25,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007005819] [2024-06-03 20:51:25,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:25,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:25,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:25,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:25,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:25,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 379 transitions, 5760 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:25,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:25,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:25,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:27,399 INFO L124 PetriNetUnfolderBase]: 6055/10585 cut-off events. [2024-06-03 20:51:27,400 INFO L125 PetriNetUnfolderBase]: For 1141311/1141316 co-relation queries the response was YES. [2024-06-03 20:51:27,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70865 conditions, 10585 events. 6055/10585 cut-off events. For 1141311/1141316 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 84337 event pairs, 2424 based on Foata normal form. 3/10584 useless extension candidates. Maximal degree in co-relation 70721. Up to 9303 conditions per place. [2024-06-03 20:51:27,512 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 136 changer transitions 0/398 dead transitions. [2024-06-03 20:51:27,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 398 transitions, 7022 flow [2024-06-03 20:51:27,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:51:27,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:51:27,513 INFO L175 Difference]: Start difference. First operand has 297 places, 379 transitions, 5760 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:51:27,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 398 transitions, 7022 flow [2024-06-03 20:51:31,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 398 transitions, 6623 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 20:51:31,006 INFO L231 Difference]: Finished difference. Result has 297 places, 382 transitions, 5701 flow [2024-06-03 20:51:31,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5376, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5701, PETRI_PLACES=297, PETRI_TRANSITIONS=382} [2024-06-03 20:51:31,006 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-03 20:51:31,006 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 382 transitions, 5701 flow [2024-06-03 20:51:31,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:31,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:31,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:31,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:51:31,007 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)] === [2024-06-03 20:51:31,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:31,007 INFO L85 PathProgramCache]: Analyzing trace with hash -239281590, now seen corresponding path program 5 times [2024-06-03 20:51:31,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:31,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096315855] [2024-06-03 20:51:31,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:31,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:31,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:31,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096315855] [2024-06-03 20:51:31,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096315855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:31,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:31,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:31,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557039205] [2024-06-03 20:51:31,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:31,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:31,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:31,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:31,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:31,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:31,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 382 transitions, 5701 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:31,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:31,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:31,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:33,048 INFO L124 PetriNetUnfolderBase]: 6052/10581 cut-off events. [2024-06-03 20:51:33,048 INFO L125 PetriNetUnfolderBase]: For 1158356/1158361 co-relation queries the response was YES. [2024-06-03 20:51:33,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70797 conditions, 10581 events. 6052/10581 cut-off events. For 1158356/1158361 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 84328 event pairs, 2424 based on Foata normal form. 3/10580 useless extension candidates. Maximal degree in co-relation 70652. Up to 9300 conditions per place. [2024-06-03 20:51:33,158 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 259 selfloop transitions, 132 changer transitions 0/397 dead transitions. [2024-06-03 20:51:33,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 397 transitions, 6711 flow [2024-06-03 20:51:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:33,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:33,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-03 20:51:33,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-03 20:51:33,159 INFO L175 Difference]: Start difference. First operand has 297 places, 382 transitions, 5701 flow. Second operand 7 states and 159 transitions. [2024-06-03 20:51:33,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 397 transitions, 6711 flow [2024-06-03 20:51:36,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 397 transitions, 6534 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:51:36,202 INFO L231 Difference]: Finished difference. Result has 301 places, 382 transitions, 5795 flow [2024-06-03 20:51:36,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5524, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5795, PETRI_PLACES=301, PETRI_TRANSITIONS=382} [2024-06-03 20:51:36,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-03 20:51:36,203 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 382 transitions, 5795 flow [2024-06-03 20:51:36,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:36,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:36,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:36,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:51:36,203 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)] === [2024-06-03 20:51:36,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:36,203 INFO L85 PathProgramCache]: Analyzing trace with hash -239114190, now seen corresponding path program 6 times [2024-06-03 20:51:36,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:36,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680739311] [2024-06-03 20:51:36,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:36,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:36,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:36,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:36,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680739311] [2024-06-03 20:51:36,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680739311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:36,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:36,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:36,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195884932] [2024-06-03 20:51:36,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:36,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:36,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:36,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:36,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:36,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 382 transitions, 5795 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:36,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:36,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:36,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:38,255 INFO L124 PetriNetUnfolderBase]: 6049/10577 cut-off events. [2024-06-03 20:51:38,255 INFO L125 PetriNetUnfolderBase]: For 1176961/1176966 co-relation queries the response was YES. [2024-06-03 20:51:38,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71001 conditions, 10577 events. 6049/10577 cut-off events. For 1176961/1176966 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 84265 event pairs, 2424 based on Foata normal form. 3/10576 useless extension candidates. Maximal degree in co-relation 70855. Up to 9297 conditions per place. [2024-06-03 20:51:38,366 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 254 selfloop transitions, 136 changer transitions 0/396 dead transitions. [2024-06-03 20:51:38,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 396 transitions, 6609 flow [2024-06-03 20:51:38,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:51:38,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:51:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-03 20:51:38,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-03 20:51:38,367 INFO L175 Difference]: Start difference. First operand has 301 places, 382 transitions, 5795 flow. Second operand 7 states and 159 transitions. [2024-06-03 20:51:38,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 396 transitions, 6609 flow [2024-06-03 20:51:42,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 396 transitions, 6178 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:51:42,015 INFO L231 Difference]: Finished difference. Result has 300 places, 382 transitions, 5642 flow [2024-06-03 20:51:42,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5364, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5642, PETRI_PLACES=300, PETRI_TRANSITIONS=382} [2024-06-03 20:51:42,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-03 20:51:42,016 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 382 transitions, 5642 flow [2024-06-03 20:51:42,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:42,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:42,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:42,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:51:42,016 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)] === [2024-06-03 20:51:42,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash -477219563, now seen corresponding path program 7 times [2024-06-03 20:51:42,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:42,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805039125] [2024-06-03 20:51:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:42,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:42,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:42,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:42,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805039125] [2024-06-03 20:51:42,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805039125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:42,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:42,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:42,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219738853] [2024-06-03 20:51:42,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:42,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:42,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:42,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:42,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:42,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 382 transitions, 5642 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:42,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:42,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:42,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:44,230 INFO L124 PetriNetUnfolderBase]: 5985/10437 cut-off events. [2024-06-03 20:51:44,230 INFO L125 PetriNetUnfolderBase]: For 1193543/1193548 co-relation queries the response was YES. [2024-06-03 20:51:44,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69353 conditions, 10437 events. 5985/10437 cut-off events. For 1193543/1193548 co-relation queries the response was YES. Maximal size of possible extension queue 780. Compared 82700 event pairs, 2368 based on Foata normal form. 14/10443 useless extension candidates. Maximal degree in co-relation 69206. Up to 9141 conditions per place. [2024-06-03 20:51:44,339 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 259 selfloop transitions, 134 changer transitions 2/401 dead transitions. [2024-06-03 20:51:44,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 401 transitions, 6484 flow [2024-06-03 20:51:44,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:44,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:44,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 20:51:44,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:51:44,340 INFO L175 Difference]: Start difference. First operand has 300 places, 382 transitions, 5642 flow. Second operand 8 states and 184 transitions. [2024-06-03 20:51:44,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 401 transitions, 6484 flow [2024-06-03 20:51:47,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 401 transitions, 5999 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-03 20:51:48,003 INFO L231 Difference]: Finished difference. Result has 299 places, 382 transitions, 5432 flow [2024-06-03 20:51:48,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5157, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5432, PETRI_PLACES=299, PETRI_TRANSITIONS=382} [2024-06-03 20:51:48,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-03 20:51:48,004 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 382 transitions, 5432 flow [2024-06-03 20:51:48,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:48,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:48,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:48,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:51:48,004 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)] === [2024-06-03 20:51:48,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:48,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1188823505, now seen corresponding path program 8 times [2024-06-03 20:51:48,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:48,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508704018] [2024-06-03 20:51:48,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:48,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:48,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:48,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508704018] [2024-06-03 20:51:48,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508704018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:48,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:48,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:48,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286486163] [2024-06-03 20:51:48,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:48,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:48,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:48,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:48,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:48,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:48,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 382 transitions, 5432 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:48,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:48,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:48,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:50,093 INFO L124 PetriNetUnfolderBase]: 5921/10261 cut-off events. [2024-06-03 20:51:50,094 INFO L125 PetriNetUnfolderBase]: For 1158203/1158208 co-relation queries the response was YES. [2024-06-03 20:51:50,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67627 conditions, 10261 events. 5921/10261 cut-off events. For 1158203/1158208 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 80479 event pairs, 2254 based on Foata normal form. 14/10259 useless extension candidates. Maximal degree in co-relation 67479. Up to 8366 conditions per place. [2024-06-03 20:51:50,203 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 256 selfloop transitions, 141 changer transitions 5/408 dead transitions. [2024-06-03 20:51:50,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 408 transitions, 6514 flow [2024-06-03 20:51:50,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:51:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:51:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 20:51:50,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-03 20:51:50,204 INFO L175 Difference]: Start difference. First operand has 299 places, 382 transitions, 5432 flow. Second operand 8 states and 190 transitions. [2024-06-03 20:51:50,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 408 transitions, 6514 flow [2024-06-03 20:51:53,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 408 transitions, 6171 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-03 20:51:53,252 INFO L231 Difference]: Finished difference. Result has 299 places, 379 transitions, 5344 flow [2024-06-03 20:51:53,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5089, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5344, PETRI_PLACES=299, PETRI_TRANSITIONS=379} [2024-06-03 20:51:53,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-03 20:51:53,253 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 379 transitions, 5344 flow [2024-06-03 20:51:53,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:53,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:53,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:53,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:51:53,254 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)] === [2024-06-03 20:51:53,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1285859287, now seen corresponding path program 1 times [2024-06-03 20:51:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:53,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073952471] [2024-06-03 20:51:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:53,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:53,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:53,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073952471] [2024-06-03 20:51:53,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073952471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:53,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:53,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:53,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896682347] [2024-06-03 20:51:53,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:53,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:53,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:53,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:53,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:53,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:53,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 379 transitions, 5344 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:53,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:53,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:53,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:51:55,224 INFO L124 PetriNetUnfolderBase]: 5797/10089 cut-off events. [2024-06-03 20:51:55,224 INFO L125 PetriNetUnfolderBase]: For 1121659/1121662 co-relation queries the response was YES. [2024-06-03 20:51:55,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66544 conditions, 10089 events. 5797/10089 cut-off events. For 1121659/1121662 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 79289 event pairs, 2223 based on Foata normal form. 4/10087 useless extension candidates. Maximal degree in co-relation 66395. Up to 8977 conditions per place. [2024-06-03 20:51:55,344 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 342 selfloop transitions, 69 changer transitions 0/417 dead transitions. [2024-06-03 20:51:55,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 417 transitions, 6554 flow [2024-06-03 20:51:55,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:51:55,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:51:55,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-03 20:51:55,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-03 20:51:55,345 INFO L175 Difference]: Start difference. First operand has 299 places, 379 transitions, 5344 flow. Second operand 9 states and 209 transitions. [2024-06-03 20:51:55,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 417 transitions, 6554 flow [2024-06-03 20:51:59,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 417 transitions, 6271 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:51:59,253 INFO L231 Difference]: Finished difference. Result has 303 places, 383 transitions, 5332 flow [2024-06-03 20:51:59,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5332, PETRI_PLACES=303, PETRI_TRANSITIONS=383} [2024-06-03 20:51:59,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-03 20:51:59,254 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 383 transitions, 5332 flow [2024-06-03 20:51:59,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:59,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:51:59,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:51:59,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:51:59,254 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)] === [2024-06-03 20:51:59,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:51:59,255 INFO L85 PathProgramCache]: Analyzing trace with hash -144579015, now seen corresponding path program 2 times [2024-06-03 20:51:59,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:51:59,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997852447] [2024-06-03 20:51:59,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:51:59,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:51:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:51:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:51:59,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:51:59,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997852447] [2024-06-03 20:51:59,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997852447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:51:59,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:51:59,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:51:59,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550127162] [2024-06-03 20:51:59,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:51:59,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:51:59,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:51:59,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:51:59,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:51:59,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:51:59,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 383 transitions, 5332 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:51:59,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:51:59,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:51:59,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:52:01,263 INFO L124 PetriNetUnfolderBase]: 5787/10108 cut-off events. [2024-06-03 20:52:01,263 INFO L125 PetriNetUnfolderBase]: For 1119624/1119627 co-relation queries the response was YES. [2024-06-03 20:52:01,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66139 conditions, 10108 events. 5787/10108 cut-off events. For 1119624/1119627 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 79783 event pairs, 2296 based on Foata normal form. 4/10107 useless extension candidates. Maximal degree in co-relation 65988. Up to 8859 conditions per place. [2024-06-03 20:52:01,375 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 258 selfloop transitions, 149 changer transitions 0/413 dead transitions. [2024-06-03 20:52:01,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 413 transitions, 6220 flow [2024-06-03 20:52:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:52:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:52:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-03 20:52:01,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-03 20:52:01,376 INFO L175 Difference]: Start difference. First operand has 303 places, 383 transitions, 5332 flow. Second operand 10 states and 226 transitions. [2024-06-03 20:52:01,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 413 transitions, 6220 flow [2024-06-03 20:52:05,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 413 transitions, 6017 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 20:52:05,455 INFO L231 Difference]: Finished difference. Result has 307 places, 383 transitions, 5434 flow [2024-06-03 20:52:05,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5129, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5434, PETRI_PLACES=307, PETRI_TRANSITIONS=383} [2024-06-03 20:52:05,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-03 20:52:05,455 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 383 transitions, 5434 flow [2024-06-03 20:52:05,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:05,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:52:05,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:52:05,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:52:05,456 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)] === [2024-06-03 20:52:05,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:52:05,456 INFO L85 PathProgramCache]: Analyzing trace with hash -500754887, now seen corresponding path program 3 times [2024-06-03 20:52:05,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:52:05,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423117090] [2024-06-03 20:52:05,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:52:05,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:52:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:52:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:52:05,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:52:05,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423117090] [2024-06-03 20:52:05,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423117090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:52:05,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:52:05,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:52:05,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94951995] [2024-06-03 20:52:05,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:52:05,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:52:05,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:52:05,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:52:05,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:52:05,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:52:05,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 383 transitions, 5434 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:52:05,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:52:05,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:52:05,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand