./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_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/safe031_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe031_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe031_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-cde23df-m [2024-06-14 14:06:15,170 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 14:06:15,251 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 14:06:15,255 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 14:06:15,256 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 14:06:15,277 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 14:06:15,277 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 14:06:15,277 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 14:06:15,278 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 14:06:15,281 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 14:06:15,281 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 14:06:15,281 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 14:06:15,282 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 14:06:15,283 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 14:06:15,283 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 14:06:15,283 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 14:06:15,283 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 14:06:15,284 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 14:06:15,284 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 14:06:15,284 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 14:06:15,284 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 14:06:15,285 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 14:06:15,285 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 14:06:15,285 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 14:06:15,285 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 14:06:15,285 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 14:06:15,285 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 14:06:15,286 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 14:06:15,286 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 14:06:15,286 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 14:06:15,287 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 14:06:15,287 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 14:06:15,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:06:15,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 14:06:15,288 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 14:06:15,288 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 14:06:15,288 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 14:06:15,288 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 14:06:15,288 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 14:06:15,288 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 14:06:15,289 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 14:06:15,292 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 14:06:15,292 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 14:06:15,292 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 14:06:15,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 14:06:15,515 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 14:06:15,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 14:06:15,517 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 14:06:15,518 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 14:06:15,518 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_tso.i [2024-06-14 14:06:16,460 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 14:06:16,622 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 14:06:16,623 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_tso.i [2024-06-14 14:06:16,644 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a84f743e8/49e046b1077347fd9e3bd5484db2b9bb/FLAG4885970aa [2024-06-14 14:06:16,656 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a84f743e8/49e046b1077347fd9e3bd5484db2b9bb [2024-06-14 14:06:16,658 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 14:06:16,658 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 14:06:16,659 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe031_tso.yml/witness.yml [2024-06-14 14:06:16,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 14:06:16,771 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 14:06:16,782 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 14:06:16,782 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 14:06:16,786 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 14:06:16,786 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:06:16" (1/2) ... [2024-06-14 14:06:16,787 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fe97a3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:16, skipping insertion in model container [2024-06-14 14:06:16,787 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:06:16" (1/2) ... [2024-06-14 14:06:16,789 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74001dde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:06:16, skipping insertion in model container [2024-06-14 14:06:16,789 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:06:16" (2/2) ... [2024-06-14 14:06:16,789 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fe97a3a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:16, skipping insertion in model container [2024-06-14 14:06:16,790 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:06:16" (2/2) ... [2024-06-14 14:06:16,790 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 14:06:16,827 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 14:06:16,829 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (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$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && x <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-14 14:06:16,829 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (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$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && x <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-14 14:06:16,829 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (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$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && x <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (x == 0 || x == 1)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-14 14:06:16,829 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 14:06:16,829 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-14 14:06:16,868 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 14:06:17,140 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:06:17,148 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 14:06:17,239 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:06:17,273 INFO L206 MainTranslator]: Completed translation [2024-06-14 14:06:17,274 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17 WrapperNode [2024-06-14 14:06:17,274 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 14:06:17,275 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 14:06:17,275 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 14:06:17,275 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 14:06:17,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17" (1/1) ... [2024-06-14 14:06:17,295 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17" (1/1) ... [2024-06-14 14:06:17,323 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-14 14:06:17,324 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 14:06:17,324 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 14:06:17,324 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 14:06:17,324 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 14:06:17,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17" (1/1) ... [2024-06-14 14:06:17,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17" (1/1) ... [2024-06-14 14:06:17,334 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17" (1/1) ... [2024-06-14 14:06:17,347 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]. [2024-06-14 14:06:17,347 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17" (1/1) ... [2024-06-14 14:06:17,347 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17" (1/1) ... [2024-06-14 14:06:17,352 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17" (1/1) ... [2024-06-14 14:06:17,353 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17" (1/1) ... [2024-06-14 14:06:17,364 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17" (1/1) ... [2024-06-14 14:06:17,366 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17" (1/1) ... [2024-06-14 14:06:17,369 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 14:06:17,370 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 14:06:17,370 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 14:06:17,370 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 14:06:17,370 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17" (1/1) ... [2024-06-14 14:06:17,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:06:17,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:06:17,394 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) [2024-06-14 14:06:17,416 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 [2024-06-14 14:06:17,425 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 14:06:17,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 14:06:17,426 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 14:06:17,426 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 14:06:17,426 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 14:06:17,426 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 14:06:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 14:06:17,427 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 14:06:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 14:06:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 14:06:17,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 14:06:17,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 14:06:17,428 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 14:06:17,548 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 14:06:17,549 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 14:06:17,746 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 14:06:17,746 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 14:06:17,810 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 14:06:17,810 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 14:06:17,810 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:06:17 BoogieIcfgContainer [2024-06-14 14:06:17,811 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 14:06:17,815 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 14:06:17,815 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 14:06:17,817 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 14:06:17,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 02:06:16" (1/4) ... [2024-06-14 14:06:17,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d89e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:06:17, skipping insertion in model container [2024-06-14 14:06:17,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:06:16" (2/4) ... [2024-06-14 14:06:17,818 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d89e52 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:06:17, skipping insertion in model container [2024-06-14 14:06:17,818 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:06:17" (3/4) ... [2024-06-14 14:06:17,819 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78d89e52 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:06:17, skipping insertion in model container [2024-06-14 14:06:17,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:06:17" (4/4) ... [2024-06-14 14:06:17,820 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_tso.i [2024-06-14 14:06:17,832 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 14:06:17,832 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 14:06:17,832 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 14:06:17,874 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 14:06:17,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 14:06:17,931 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 14:06:17,932 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:06:17,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 14:06:17,933 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 14:06:17,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 14:06:17,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 14:06:17,953 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;@3cfc9513, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 14:06:17,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 14:06:17,957 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 14:06:17,957 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 14:06:17,958 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:06:17,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:17,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 14:06:17,959 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)] === [2024-06-14 14:06:17,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:17,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1782944907, now seen corresponding path program 1 times [2024-06-14 14:06:17,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:17,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088273652] [2024-06-14 14:06:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:17,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:18,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:18,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:18,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088273652] [2024-06-14 14:06:18,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088273652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:18,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:18,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 14:06:18,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78014883] [2024-06-14 14:06:18,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:18,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:06:18,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:06:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:06:18,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:06:18,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:18,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:06:18,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:18,805 INFO L124 PetriNetUnfolderBase]: 736/1214 cut-off events. [2024-06-14 14:06:18,805 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-14 14:06:18,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2401 conditions, 1214 events. 736/1214 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6177 event pairs, 471 based on Foata normal form. 1/1159 useless extension candidates. Maximal degree in co-relation 2386. Up to 1122 conditions per place. [2024-06-14 14:06:18,815 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 14:06:18,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 171 flow [2024-06-14 14:06:18,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:06:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:06:18,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-14 14:06:18,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6587301587301587 [2024-06-14 14:06:18,826 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 83 transitions. [2024-06-14 14:06:18,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 171 flow [2024-06-14 14:06:18,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:18,830 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 14:06:18,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 14:06:18,834 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 14:06:18,837 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 14:06:18,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:18,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:18,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:18,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 14:06:18,838 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)] === [2024-06-14 14:06:18,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:18,839 INFO L85 PathProgramCache]: Analyzing trace with hash 281906836, now seen corresponding path program 1 times [2024-06-14 14:06:18,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:18,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382003553] [2024-06-14 14:06:18,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:18,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:19,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:19,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:19,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382003553] [2024-06-14 14:06:19,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382003553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:19,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:19,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:06:19,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254692] [2024-06-14 14:06:19,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:19,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:06:19,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:19,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:06:19,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:06:19,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:06:19,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:19,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:19,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:06:19,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:19,231 INFO L124 PetriNetUnfolderBase]: 730/1205 cut-off events. [2024-06-14 14:06:19,231 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2024-06-14 14:06:19,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2742 conditions, 1205 events. 730/1205 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6134 event pairs, 403 based on Foata normal form. 3/1182 useless extension candidates. Maximal degree in co-relation 2727. Up to 1098 conditions per place. [2024-06-14 14:06:19,239 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 38 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-14 14:06:19,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 238 flow [2024-06-14 14:06:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:06:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:06:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-06-14 14:06:19,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-14 14:06:19,241 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 108 transitions. [2024-06-14 14:06:19,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 238 flow [2024-06-14 14:06:19,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:06:19,242 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-14 14:06:19,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-14 14:06:19,243 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-14 14:06:19,243 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-14 14:06:19,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:19,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:19,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:19,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 14:06:19,244 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:19,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1529058956, now seen corresponding path program 1 times [2024-06-14 14:06:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:19,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110603929] [2024-06-14 14:06:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:19,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:19,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:19,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110603929] [2024-06-14 14:06:19,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110603929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:19,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:19,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:06:19,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149619468] [2024-06-14 14:06:19,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:19,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:06:19,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:19,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:06:19,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:06:19,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:19,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:19,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:19,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:19,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:19,710 INFO L124 PetriNetUnfolderBase]: 929/1500 cut-off events. [2024-06-14 14:06:19,711 INFO L125 PetriNetUnfolderBase]: For 749/749 co-relation queries the response was YES. [2024-06-14 14:06:19,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3813 conditions, 1500 events. 929/1500 cut-off events. For 749/749 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7391 event pairs, 537 based on Foata normal form. 2/1476 useless extension candidates. Maximal degree in co-relation 3796. Up to 1397 conditions per place. [2024-06-14 14:06:19,718 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-14 14:06:19,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 270 flow [2024-06-14 14:06:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:06:19,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:06:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 14:06:19,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-14 14:06:19,720 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 4 states and 101 transitions. [2024-06-14 14:06:19,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 270 flow [2024-06-14 14:06:19,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:19,722 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 164 flow [2024-06-14 14:06:19,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=164, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2024-06-14 14:06:19,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 5 predicate places. [2024-06-14 14:06:19,723 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 164 flow [2024-06-14 14:06:19,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:19,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:19,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:19,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 14:06:19,724 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)] === [2024-06-14 14:06:19,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:19,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1136654126, now seen corresponding path program 1 times [2024-06-14 14:06:19,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:19,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59433908] [2024-06-14 14:06:19,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:19,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:19,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:19,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59433908] [2024-06-14 14:06:19,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59433908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:19,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:19,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:19,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190857826] [2024-06-14 14:06:19,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:19,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:19,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:19,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:19,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:19,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:19,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 164 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:19,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:19,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:19,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:20,123 INFO L124 PetriNetUnfolderBase]: 920/1491 cut-off events. [2024-06-14 14:06:20,123 INFO L125 PetriNetUnfolderBase]: For 1286/1286 co-relation queries the response was YES. [2024-06-14 14:06:20,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4130 conditions, 1491 events. 920/1491 cut-off events. For 1286/1286 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7417 event pairs, 290 based on Foata normal form. 6/1479 useless extension candidates. Maximal degree in co-relation 4112. Up to 1331 conditions per place. [2024-06-14 14:06:20,131 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-14 14:06:20,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 72 transitions, 378 flow [2024-06-14 14:06:20,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:20,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:06:20,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 14:06:20,135 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 164 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:06:20,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 72 transitions, 378 flow [2024-06-14 14:06:20,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 362 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:20,139 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 207 flow [2024-06-14 14:06:20,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-14 14:06:20,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-14 14:06:20,141 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 207 flow [2024-06-14 14:06:20,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:20,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:20,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 14:06:20,142 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)] === [2024-06-14 14:06:20,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:20,142 INFO L85 PathProgramCache]: Analyzing trace with hash 156188673, now seen corresponding path program 1 times [2024-06-14 14:06:20,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:20,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099370230] [2024-06-14 14:06:20,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:20,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:20,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:20,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:20,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099370230] [2024-06-14 14:06:20,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099370230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:20,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:20,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:20,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342906068] [2024-06-14 14:06:20,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:20,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:20,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:20,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:20,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:20,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:20,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:20,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:20,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:20,509 INFO L124 PetriNetUnfolderBase]: 922/1502 cut-off events. [2024-06-14 14:06:20,509 INFO L125 PetriNetUnfolderBase]: For 2164/2164 co-relation queries the response was YES. [2024-06-14 14:06:20,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4536 conditions, 1502 events. 922/1502 cut-off events. For 2164/2164 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7422 event pairs, 359 based on Foata normal form. 3/1504 useless extension candidates. Maximal degree in co-relation 4516. Up to 1357 conditions per place. [2024-06-14 14:06:20,518 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 51 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-14 14:06:20,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 74 transitions, 449 flow [2024-06-14 14:06:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:20,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:20,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 14:06:20,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-14 14:06:20,520 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 207 flow. Second operand 5 states and 127 transitions. [2024-06-14 14:06:20,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 74 transitions, 449 flow [2024-06-14 14:06:20,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 74 transitions, 420 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:20,525 INFO L231 Difference]: Finished difference. Result has 56 places, 57 transitions, 297 flow [2024-06-14 14:06:20,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=56, PETRI_TRANSITIONS=57} [2024-06-14 14:06:20,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-14 14:06:20,528 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 57 transitions, 297 flow [2024-06-14 14:06:20,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:20,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:20,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 14:06:20,531 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)] === [2024-06-14 14:06:20,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:20,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1148260319, now seen corresponding path program 1 times [2024-06-14 14:06:20,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:20,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936107496] [2024-06-14 14:06:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:20,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:20,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:20,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:20,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936107496] [2024-06-14 14:06:20,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936107496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:20,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:20,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:20,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368869961] [2024-06-14 14:06:20,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:20,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:20,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:20,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:20,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:20,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:20,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 57 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:20,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:20,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:20,932 INFO L124 PetriNetUnfolderBase]: 933/1547 cut-off events. [2024-06-14 14:06:20,933 INFO L125 PetriNetUnfolderBase]: For 3582/3586 co-relation queries the response was YES. [2024-06-14 14:06:20,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5242 conditions, 1547 events. 933/1547 cut-off events. For 3582/3586 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7817 event pairs, 352 based on Foata normal form. 6/1551 useless extension candidates. Maximal degree in co-relation 5219. Up to 1366 conditions per place. [2024-06-14 14:06:20,941 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 61 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-06-14 14:06:20,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 83 transitions, 563 flow [2024-06-14 14:06:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:20,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-14 14:06:20,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-14 14:06:20,942 INFO L175 Difference]: Start difference. First operand has 56 places, 57 transitions, 297 flow. Second operand 5 states and 128 transitions. [2024-06-14 14:06:20,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 83 transitions, 563 flow [2024-06-14 14:06:20,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 551 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-14 14:06:20,946 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 373 flow [2024-06-14 14:06:20,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=373, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-14 14:06:20,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-14 14:06:20,947 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 373 flow [2024-06-14 14:06:20,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:20,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:20,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:20,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 14:06:20,948 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)] === [2024-06-14 14:06:20,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:20,948 INFO L85 PathProgramCache]: Analyzing trace with hash 571898403, now seen corresponding path program 2 times [2024-06-14 14:06:20,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:20,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994193162] [2024-06-14 14:06:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:20,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:21,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:21,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994193162] [2024-06-14 14:06:21,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994193162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:21,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:21,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:21,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471002781] [2024-06-14 14:06:21,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:21,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:21,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:21,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:21,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:21,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:21,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 373 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:21,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:21,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:21,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:21,361 INFO L124 PetriNetUnfolderBase]: 928/1539 cut-off events. [2024-06-14 14:06:21,361 INFO L125 PetriNetUnfolderBase]: For 4728/4728 co-relation queries the response was YES. [2024-06-14 14:06:21,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5602 conditions, 1539 events. 928/1539 cut-off events. For 4728/4728 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7686 event pairs, 348 based on Foata normal form. 2/1539 useless extension candidates. Maximal degree in co-relation 5576. Up to 1361 conditions per place. [2024-06-14 14:06:21,369 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 66 selfloop transitions, 16 changer transitions 0/89 dead transitions. [2024-06-14 14:06:21,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 89 transitions, 603 flow [2024-06-14 14:06:21,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:21,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 14:06:21,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-14 14:06:21,371 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 373 flow. Second operand 7 states and 166 transitions. [2024-06-14 14:06:21,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 89 transitions, 603 flow [2024-06-14 14:06:21,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 89 transitions, 567 flow, removed 15 selfloop flow, removed 1 redundant places. [2024-06-14 14:06:21,377 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 377 flow [2024-06-14 14:06:21,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=377, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-14 14:06:21,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-14 14:06:21,379 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 377 flow [2024-06-14 14:06:21,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:21,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:21,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:21,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 14:06:21,379 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)] === [2024-06-14 14:06:21,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:21,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2146762988, now seen corresponding path program 1 times [2024-06-14 14:06:21,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:21,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530716977] [2024-06-14 14:06:21,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:21,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:21,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:21,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530716977] [2024-06-14 14:06:21,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530716977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:21,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:21,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:21,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295852946] [2024-06-14 14:06:21,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:21,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:21,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:21,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:21,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:21,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:21,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 377 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:21,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:21,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:21,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:21,838 INFO L124 PetriNetUnfolderBase]: 1001/1640 cut-off events. [2024-06-14 14:06:21,838 INFO L125 PetriNetUnfolderBase]: For 5704/5704 co-relation queries the response was YES. [2024-06-14 14:06:21,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6045 conditions, 1640 events. 1001/1640 cut-off events. For 5704/5704 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8281 event pairs, 328 based on Foata normal form. 4/1642 useless extension candidates. Maximal degree in co-relation 6017. Up to 1286 conditions per place. [2024-06-14 14:06:21,848 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 72 selfloop transitions, 35 changer transitions 0/114 dead transitions. [2024-06-14 14:06:21,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 861 flow [2024-06-14 14:06:21,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 14:06:21,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-14 14:06:21,853 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 377 flow. Second operand 7 states and 183 transitions. [2024-06-14 14:06:21,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 861 flow [2024-06-14 14:06:21,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 114 transitions, 817 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:21,861 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 556 flow [2024-06-14 14:06:21,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=556, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2024-06-14 14:06:21,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-14 14:06:21,862 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 556 flow [2024-06-14 14:06:21,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:21,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:21,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:21,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 14:06:21,863 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)] === [2024-06-14 14:06:21,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:21,863 INFO L85 PathProgramCache]: Analyzing trace with hash 548982602, now seen corresponding path program 2 times [2024-06-14 14:06:21,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:21,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229736152] [2024-06-14 14:06:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:21,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:21,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:22,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:22,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229736152] [2024-06-14 14:06:22,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229736152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:22,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:22,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:22,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059146043] [2024-06-14 14:06:22,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:22,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:22,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:22,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:22,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:22,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:22,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 556 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:22,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:22,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:22,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:22,273 INFO L124 PetriNetUnfolderBase]: 1026/1687 cut-off events. [2024-06-14 14:06:22,273 INFO L125 PetriNetUnfolderBase]: For 8153/8153 co-relation queries the response was YES. [2024-06-14 14:06:22,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7184 conditions, 1687 events. 1026/1687 cut-off events. For 8153/8153 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8565 event pairs, 322 based on Foata normal form. 4/1690 useless extension candidates. Maximal degree in co-relation 7153. Up to 1311 conditions per place. [2024-06-14 14:06:22,284 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 82 selfloop transitions, 44 changer transitions 0/133 dead transitions. [2024-06-14 14:06:22,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 133 transitions, 1127 flow [2024-06-14 14:06:22,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:22,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:22,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 14:06:22,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 14:06:22,286 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 556 flow. Second operand 8 states and 208 transitions. [2024-06-14 14:06:22,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 133 transitions, 1127 flow [2024-06-14 14:06:22,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 133 transitions, 1074 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-14 14:06:22,300 INFO L231 Difference]: Finished difference. Result has 80 places, 95 transitions, 762 flow [2024-06-14 14:06:22,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=762, PETRI_PLACES=80, PETRI_TRANSITIONS=95} [2024-06-14 14:06:22,300 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-14 14:06:22,300 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 95 transitions, 762 flow [2024-06-14 14:06:22,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:22,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:22,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:22,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 14:06:22,301 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)] === [2024-06-14 14:06:22,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:22,302 INFO L85 PathProgramCache]: Analyzing trace with hash -482706588, now seen corresponding path program 3 times [2024-06-14 14:06:22,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:22,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228206047] [2024-06-14 14:06:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:22,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:22,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:22,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228206047] [2024-06-14 14:06:22,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228206047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:22,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:22,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:22,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119528598] [2024-06-14 14:06:22,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:22,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:22,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:22,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:22,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 95 transitions, 762 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:22,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:22,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:22,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:22,804 INFO L124 PetriNetUnfolderBase]: 1051/1734 cut-off events. [2024-06-14 14:06:22,804 INFO L125 PetriNetUnfolderBase]: For 10617/10617 co-relation queries the response was YES. [2024-06-14 14:06:22,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8092 conditions, 1734 events. 1051/1734 cut-off events. For 10617/10617 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8968 event pairs, 321 based on Foata normal form. 4/1737 useless extension candidates. Maximal degree in co-relation 8056. Up to 1337 conditions per place. [2024-06-14 14:06:22,821 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 80 selfloop transitions, 57 changer transitions 0/144 dead transitions. [2024-06-14 14:06:22,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 144 transitions, 1328 flow [2024-06-14 14:06:22,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:22,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:22,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-14 14:06:22,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6058201058201058 [2024-06-14 14:06:22,823 INFO L175 Difference]: Start difference. First operand has 80 places, 95 transitions, 762 flow. Second operand 9 states and 229 transitions. [2024-06-14 14:06:22,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 144 transitions, 1328 flow [2024-06-14 14:06:22,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 144 transitions, 1260 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:22,841 INFO L231 Difference]: Finished difference. Result has 88 places, 105 transitions, 977 flow [2024-06-14 14:06:22,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=977, PETRI_PLACES=88, PETRI_TRANSITIONS=105} [2024-06-14 14:06:22,843 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-14 14:06:22,845 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 105 transitions, 977 flow [2024-06-14 14:06:22,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:22,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:22,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:22,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 14:06:22,846 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)] === [2024-06-14 14:06:22,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:22,846 INFO L85 PathProgramCache]: Analyzing trace with hash -226498208, now seen corresponding path program 1 times [2024-06-14 14:06:22,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:22,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940811502] [2024-06-14 14:06:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:22,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:22,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:23,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:23,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940811502] [2024-06-14 14:06:23,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940811502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:23,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:23,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:23,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42882551] [2024-06-14 14:06:23,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:23,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:23,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:23,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:23,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:23,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:23,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 105 transitions, 977 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:23,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:23,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:23,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:23,308 INFO L124 PetriNetUnfolderBase]: 1054/1758 cut-off events. [2024-06-14 14:06:23,308 INFO L125 PetriNetUnfolderBase]: For 13311/13311 co-relation queries the response was YES. [2024-06-14 14:06:23,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8624 conditions, 1758 events. 1054/1758 cut-off events. For 13311/13311 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9067 event pairs, 317 based on Foata normal form. 6/1763 useless extension candidates. Maximal degree in co-relation 8585. Up to 1518 conditions per place. [2024-06-14 14:06:23,320 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 104 selfloop transitions, 19 changer transitions 0/130 dead transitions. [2024-06-14 14:06:23,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 130 transitions, 1353 flow [2024-06-14 14:06:23,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:23,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:06:23,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-14 14:06:23,321 INFO L175 Difference]: Start difference. First operand has 88 places, 105 transitions, 977 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:06:23,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 130 transitions, 1353 flow [2024-06-14 14:06:23,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 130 transitions, 1266 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:23,337 INFO L231 Difference]: Finished difference. Result has 89 places, 108 transitions, 978 flow [2024-06-14 14:06:23,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=978, PETRI_PLACES=89, PETRI_TRANSITIONS=108} [2024-06-14 14:06:23,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-14 14:06:23,338 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 108 transitions, 978 flow [2024-06-14 14:06:23,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:23,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:23,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:23,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 14:06:23,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:23,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:23,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1423829980, now seen corresponding path program 1 times [2024-06-14 14:06:23,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:23,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906869335] [2024-06-14 14:06:23,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:23,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:23,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:23,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:23,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906869335] [2024-06-14 14:06:23,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906869335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:23,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:23,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:06:23,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531276828] [2024-06-14 14:06:23,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:23,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:06:23,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:23,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:06:23,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:06:23,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:06:23,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 108 transitions, 978 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2024-06-14 14:06:23,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:23,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:06:23,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:23,722 INFO L124 PetriNetUnfolderBase]: 1011/1712 cut-off events. [2024-06-14 14:06:23,722 INFO L125 PetriNetUnfolderBase]: For 13648/13648 co-relation queries the response was YES. [2024-06-14 14:06:23,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8365 conditions, 1712 events. 1011/1712 cut-off events. For 13648/13648 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8939 event pairs, 334 based on Foata normal form. 1/1712 useless extension candidates. Maximal degree in co-relation 8325. Up to 1421 conditions per place. [2024-06-14 14:06:23,733 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 89 selfloop transitions, 7 changer transitions 0/116 dead transitions. [2024-06-14 14:06:23,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 116 transitions, 1190 flow [2024-06-14 14:06:23,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:06:23,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:06:23,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-14 14:06:23,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-14 14:06:23,735 INFO L175 Difference]: Start difference. First operand has 89 places, 108 transitions, 978 flow. Second operand 4 states and 99 transitions. [2024-06-14 14:06:23,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 116 transitions, 1190 flow [2024-06-14 14:06:23,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 116 transitions, 1120 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:23,751 INFO L231 Difference]: Finished difference. Result has 89 places, 108 transitions, 928 flow [2024-06-14 14:06:23,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=928, PETRI_PLACES=89, PETRI_TRANSITIONS=108} [2024-06-14 14:06:23,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-14 14:06:23,752 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 108 transitions, 928 flow [2024-06-14 14:06:23,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 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) [2024-06-14 14:06:23,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:23,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:23,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 14:06:23,753 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:23,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash 323701376, now seen corresponding path program 1 times [2024-06-14 14:06:23,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:23,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988157792] [2024-06-14 14:06:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:23,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:23,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:23,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:23,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988157792] [2024-06-14 14:06:23,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988157792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:23,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:23,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:23,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705936972] [2024-06-14 14:06:23,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:23,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:23,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:23,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:23,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:23,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:23,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 108 transitions, 928 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:23,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:23,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:23,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:24,206 INFO L124 PetriNetUnfolderBase]: 1062/1772 cut-off events. [2024-06-14 14:06:24,206 INFO L125 PetriNetUnfolderBase]: For 15005/15005 co-relation queries the response was YES. [2024-06-14 14:06:24,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8682 conditions, 1772 events. 1062/1772 cut-off events. For 15005/15005 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9153 event pairs, 319 based on Foata normal form. 2/1773 useless extension candidates. Maximal degree in co-relation 8641. Up to 1554 conditions per place. [2024-06-14 14:06:24,217 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 116 selfloop transitions, 13 changer transitions 0/136 dead transitions. [2024-06-14 14:06:24,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 136 transitions, 1288 flow [2024-06-14 14:06:24,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 14:06:24,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 14:06:24,219 INFO L175 Difference]: Start difference. First operand has 89 places, 108 transitions, 928 flow. Second operand 6 states and 148 transitions. [2024-06-14 14:06:24,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 136 transitions, 1288 flow [2024-06-14 14:06:24,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 136 transitions, 1268 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:24,237 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 986 flow [2024-06-14 14:06:24,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=986, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-14 14:06:24,238 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-14 14:06:24,238 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 986 flow [2024-06-14 14:06:24,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:24,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:24,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:24,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 14:06:24,239 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)] === [2024-06-14 14:06:24,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:24,239 INFO L85 PathProgramCache]: Analyzing trace with hash 328462976, now seen corresponding path program 2 times [2024-06-14 14:06:24,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:24,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419815512] [2024-06-14 14:06:24,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:24,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:24,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:24,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:24,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419815512] [2024-06-14 14:06:24,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419815512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:24,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:24,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:24,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782654885] [2024-06-14 14:06:24,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:24,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:24,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:24,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:24,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:24,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:24,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 986 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:24,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:24,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:24,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:24,691 INFO L124 PetriNetUnfolderBase]: 1073/1798 cut-off events. [2024-06-14 14:06:24,691 INFO L125 PetriNetUnfolderBase]: For 17691/17695 co-relation queries the response was YES. [2024-06-14 14:06:24,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9168 conditions, 1798 events. 1073/1798 cut-off events. For 17691/17695 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9379 event pairs, 323 based on Foata normal form. 6/1803 useless extension candidates. Maximal degree in co-relation 9127. Up to 1523 conditions per place. [2024-06-14 14:06:24,702 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 109 selfloop transitions, 25 changer transitions 0/141 dead transitions. [2024-06-14 14:06:24,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 141 transitions, 1452 flow [2024-06-14 14:06:24,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:24,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:24,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 14:06:24,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-14 14:06:24,704 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 986 flow. Second operand 6 states and 151 transitions. [2024-06-14 14:06:24,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 141 transitions, 1452 flow [2024-06-14 14:06:24,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 141 transitions, 1398 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:24,723 INFO L231 Difference]: Finished difference. Result has 94 places, 117 transitions, 1084 flow [2024-06-14 14:06:24,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1084, PETRI_PLACES=94, PETRI_TRANSITIONS=117} [2024-06-14 14:06:24,724 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-14 14:06:24,724 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 117 transitions, 1084 flow [2024-06-14 14:06:24,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:24,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:24,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:24,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 14:06:24,725 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)] === [2024-06-14 14:06:24,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:24,725 INFO L85 PathProgramCache]: Analyzing trace with hash -161414142, now seen corresponding path program 3 times [2024-06-14 14:06:24,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:24,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201725512] [2024-06-14 14:06:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:24,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:24,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:24,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:24,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201725512] [2024-06-14 14:06:24,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201725512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:24,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:24,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:24,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940096429] [2024-06-14 14:06:24,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:24,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:24,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:24,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:24,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:24,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:24,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 117 transitions, 1084 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:24,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:24,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:24,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:25,206 INFO L124 PetriNetUnfolderBase]: 1068/1790 cut-off events. [2024-06-14 14:06:25,207 INFO L125 PetriNetUnfolderBase]: For 20004/20004 co-relation queries the response was YES. [2024-06-14 14:06:25,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9426 conditions, 1790 events. 1068/1790 cut-off events. For 20004/20004 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9295 event pairs, 319 based on Foata normal form. 2/1791 useless extension candidates. Maximal degree in co-relation 9384. Up to 1518 conditions per place. [2024-06-14 14:06:25,218 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 114 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2024-06-14 14:06:25,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 147 transitions, 1440 flow [2024-06-14 14:06:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:25,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:25,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:06:25,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:06:25,220 INFO L175 Difference]: Start difference. First operand has 94 places, 117 transitions, 1084 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:06:25,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 147 transitions, 1440 flow [2024-06-14 14:06:25,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 147 transitions, 1362 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:25,240 INFO L231 Difference]: Finished difference. Result has 100 places, 117 transitions, 1066 flow [2024-06-14 14:06:25,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1066, PETRI_PLACES=100, PETRI_TRANSITIONS=117} [2024-06-14 14:06:25,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-14 14:06:25,241 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 117 transitions, 1066 flow [2024-06-14 14:06:25,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:25,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:25,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:25,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 14:06:25,242 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:25,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:25,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1188365619, now seen corresponding path program 1 times [2024-06-14 14:06:25,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:25,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81647244] [2024-06-14 14:06:25,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:25,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:25,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:25,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81647244] [2024-06-14 14:06:25,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81647244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:25,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:25,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:25,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611048429] [2024-06-14 14:06:25,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:25,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:25,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:25,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:25,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:25,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:06:25,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 117 transitions, 1066 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-14 14:06:25,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:25,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:06:25,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:25,679 INFO L124 PetriNetUnfolderBase]: 1025/1749 cut-off events. [2024-06-14 14:06:25,679 INFO L125 PetriNetUnfolderBase]: For 20856/20866 co-relation queries the response was YES. [2024-06-14 14:06:25,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9254 conditions, 1749 events. 1025/1749 cut-off events. For 20856/20866 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9176 event pairs, 310 based on Foata normal form. 3/1748 useless extension candidates. Maximal degree in co-relation 9210. Up to 1401 conditions per place. [2024-06-14 14:06:25,692 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 97 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2024-06-14 14:06:25,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 142 transitions, 1444 flow [2024-06-14 14:06:25,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:25,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:25,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 14:06:25,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-14 14:06:25,693 INFO L175 Difference]: Start difference. First operand has 100 places, 117 transitions, 1066 flow. Second operand 7 states and 165 transitions. [2024-06-14 14:06:25,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 142 transitions, 1444 flow [2024-06-14 14:06:25,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 1372 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:25,714 INFO L231 Difference]: Finished difference. Result has 101 places, 124 transitions, 1134 flow [2024-06-14 14:06:25,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1134, PETRI_PLACES=101, PETRI_TRANSITIONS=124} [2024-06-14 14:06:25,715 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-14 14:06:25,716 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 124 transitions, 1134 flow [2024-06-14 14:06:25,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-14 14:06:25,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:25,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:25,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 14:06:25,716 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:25,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:25,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1449249931, now seen corresponding path program 1 times [2024-06-14 14:06:25,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:25,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842150615] [2024-06-14 14:06:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:25,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:25,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:25,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842150615] [2024-06-14 14:06:25,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842150615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:25,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:25,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:25,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809008028] [2024-06-14 14:06:25,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:25,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:25,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:25,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:25,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:25,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:25,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 124 transitions, 1134 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:25,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:25,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:25,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:26,231 INFO L124 PetriNetUnfolderBase]: 1120/1875 cut-off events. [2024-06-14 14:06:26,231 INFO L125 PetriNetUnfolderBase]: For 24104/24104 co-relation queries the response was YES. [2024-06-14 14:06:26,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10337 conditions, 1875 events. 1120/1875 cut-off events. For 24104/24104 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 9862 event pairs, 296 based on Foata normal form. 4/1878 useless extension candidates. Maximal degree in co-relation 10291. Up to 1565 conditions per place. [2024-06-14 14:06:26,244 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 36 changer transitions 0/167 dead transitions. [2024-06-14 14:06:26,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 167 transitions, 1738 flow [2024-06-14 14:06:26,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-14 14:06:26,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-14 14:06:26,246 INFO L175 Difference]: Start difference. First operand has 101 places, 124 transitions, 1134 flow. Second operand 8 states and 202 transitions. [2024-06-14 14:06:26,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 167 transitions, 1738 flow [2024-06-14 14:06:26,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 167 transitions, 1655 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:26,273 INFO L231 Difference]: Finished difference. Result has 105 places, 134 transitions, 1262 flow [2024-06-14 14:06:26,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1262, PETRI_PLACES=105, PETRI_TRANSITIONS=134} [2024-06-14 14:06:26,273 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-14 14:06:26,274 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 134 transitions, 1262 flow [2024-06-14 14:06:26,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:26,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:26,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:26,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 14:06:26,274 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)] === [2024-06-14 14:06:26,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:26,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1592418957, now seen corresponding path program 2 times [2024-06-14 14:06:26,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:26,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045046784] [2024-06-14 14:06:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:26,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:26,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:26,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045046784] [2024-06-14 14:06:26,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045046784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:26,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:26,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:26,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629995874] [2024-06-14 14:06:26,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:26,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:26,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:26,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:26,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:26,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:26,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 134 transitions, 1262 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:26,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:26,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:26,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:26,831 INFO L124 PetriNetUnfolderBase]: 1209/2021 cut-off events. [2024-06-14 14:06:26,831 INFO L125 PetriNetUnfolderBase]: For 29325/29325 co-relation queries the response was YES. [2024-06-14 14:06:26,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11687 conditions, 2021 events. 1209/2021 cut-off events. For 29325/29325 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10795 event pairs, 290 based on Foata normal form. 4/2023 useless extension candidates. Maximal degree in co-relation 11640. Up to 1311 conditions per place. [2024-06-14 14:06:26,850 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 104 selfloop transitions, 78 changer transitions 0/189 dead transitions. [2024-06-14 14:06:26,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 189 transitions, 2224 flow [2024-06-14 14:06:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:26,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 14:06:26,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-14 14:06:26,852 INFO L175 Difference]: Start difference. First operand has 105 places, 134 transitions, 1262 flow. Second operand 8 states and 212 transitions. [2024-06-14 14:06:26,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 189 transitions, 2224 flow [2024-06-14 14:06:26,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 189 transitions, 2081 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:26,888 INFO L231 Difference]: Finished difference. Result has 110 places, 151 transitions, 1503 flow [2024-06-14 14:06:26,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1125, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1503, PETRI_PLACES=110, PETRI_TRANSITIONS=151} [2024-06-14 14:06:26,888 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-14 14:06:26,889 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 151 transitions, 1503 flow [2024-06-14 14:06:26,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:26,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:26,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:26,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 14:06:26,889 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)] === [2024-06-14 14:06:26,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:26,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1454963851, now seen corresponding path program 3 times [2024-06-14 14:06:26,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:26,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083985914] [2024-06-14 14:06:26,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:26,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:27,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:27,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083985914] [2024-06-14 14:06:27,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083985914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:27,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:27,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:27,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446271287] [2024-06-14 14:06:27,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:27,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:27,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:27,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:27,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:27,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:27,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 151 transitions, 1503 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:27,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:27,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:27,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:27,393 INFO L124 PetriNetUnfolderBase]: 1210/2026 cut-off events. [2024-06-14 14:06:27,393 INFO L125 PetriNetUnfolderBase]: For 33131/33131 co-relation queries the response was YES. [2024-06-14 14:06:27,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12339 conditions, 2026 events. 1210/2026 cut-off events. For 33131/33131 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10877 event pairs, 290 based on Foata normal form. 4/2028 useless extension candidates. Maximal degree in co-relation 12290. Up to 1313 conditions per place. [2024-06-14 14:06:27,407 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 97 selfloop transitions, 87 changer transitions 0/191 dead transitions. [2024-06-14 14:06:27,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 191 transitions, 2275 flow [2024-06-14 14:06:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:27,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:27,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-14 14:06:27,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 14:06:27,409 INFO L175 Difference]: Start difference. First operand has 110 places, 151 transitions, 1503 flow. Second operand 8 states and 210 transitions. [2024-06-14 14:06:27,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 191 transitions, 2275 flow [2024-06-14 14:06:27,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 191 transitions, 2120 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:27,443 INFO L231 Difference]: Finished difference. Result has 116 places, 156 transitions, 1614 flow [2024-06-14 14:06:27,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1370, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1614, PETRI_PLACES=116, PETRI_TRANSITIONS=156} [2024-06-14 14:06:27,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-14 14:06:27,444 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 156 transitions, 1614 flow [2024-06-14 14:06:27,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:27,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:27,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:27,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 14:06:27,445 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)] === [2024-06-14 14:06:27,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:27,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1592634283, now seen corresponding path program 1 times [2024-06-14 14:06:27,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:27,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057452661] [2024-06-14 14:06:27,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:27,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:27,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:27,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057452661] [2024-06-14 14:06:27,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057452661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:27,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:27,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:27,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258025168] [2024-06-14 14:06:27,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:27,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:27,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:27,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:27,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:27,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:27,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 156 transitions, 1614 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:27,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:27,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:27,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:27,942 INFO L124 PetriNetUnfolderBase]: 1276/2137 cut-off events. [2024-06-14 14:06:27,943 INFO L125 PetriNetUnfolderBase]: For 37887/37887 co-relation queries the response was YES. [2024-06-14 14:06:27,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12916 conditions, 2137 events. 1276/2137 cut-off events. For 37887/37887 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11600 event pairs, 297 based on Foata normal form. 14/2149 useless extension candidates. Maximal degree in co-relation 12865. Up to 1608 conditions per place. [2024-06-14 14:06:27,959 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 131 selfloop transitions, 56 changer transitions 0/194 dead transitions. [2024-06-14 14:06:27,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 194 transitions, 2284 flow [2024-06-14 14:06:27,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:27,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 14:06:27,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-14 14:06:27,960 INFO L175 Difference]: Start difference. First operand has 116 places, 156 transitions, 1614 flow. Second operand 8 states and 207 transitions. [2024-06-14 14:06:27,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 194 transitions, 2284 flow [2024-06-14 14:06:27,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 194 transitions, 2107 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:27,992 INFO L231 Difference]: Finished difference. Result has 119 places, 159 transitions, 1612 flow [2024-06-14 14:06:27,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1437, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1612, PETRI_PLACES=119, PETRI_TRANSITIONS=159} [2024-06-14 14:06:27,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-14 14:06:27,993 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 159 transitions, 1612 flow [2024-06-14 14:06:27,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:27,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:27,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:27,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 14:06:27,994 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)] === [2024-06-14 14:06:27,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:27,994 INFO L85 PathProgramCache]: Analyzing trace with hash -425291775, now seen corresponding path program 1 times [2024-06-14 14:06:27,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:27,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981988626] [2024-06-14 14:06:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:27,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:28,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:28,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:28,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:28,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981988626] [2024-06-14 14:06:28,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981988626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:28,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:28,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:28,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746229278] [2024-06-14 14:06:28,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:28,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:28,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:28,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:28,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:28,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:06:28,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 159 transitions, 1612 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-14 14:06:28,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:28,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:06:28,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:28,418 INFO L124 PetriNetUnfolderBase]: 1207/2075 cut-off events. [2024-06-14 14:06:28,419 INFO L125 PetriNetUnfolderBase]: For 36762/36786 co-relation queries the response was YES. [2024-06-14 14:06:28,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12605 conditions, 2075 events. 1207/2075 cut-off events. For 36762/36786 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11478 event pairs, 303 based on Foata normal form. 2/2070 useless extension candidates. Maximal degree in co-relation 12553. Up to 1653 conditions per place. [2024-06-14 14:06:28,434 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 131 selfloop transitions, 29 changer transitions 0/181 dead transitions. [2024-06-14 14:06:28,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 181 transitions, 2088 flow [2024-06-14 14:06:28,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:06:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:06:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 14:06:28,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 14:06:28,436 INFO L175 Difference]: Start difference. First operand has 119 places, 159 transitions, 1612 flow. Second operand 6 states and 148 transitions. [2024-06-14 14:06:28,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 181 transitions, 2088 flow [2024-06-14 14:06:28,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 181 transitions, 1941 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:28,472 INFO L231 Difference]: Finished difference. Result has 119 places, 164 transitions, 1606 flow [2024-06-14 14:06:28,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1606, PETRI_PLACES=119, PETRI_TRANSITIONS=164} [2024-06-14 14:06:28,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-14 14:06:28,473 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 164 transitions, 1606 flow [2024-06-14 14:06:28,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-14 14:06:28,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:28,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:28,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 14:06:28,474 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)] === [2024-06-14 14:06:28,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:28,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1369055551, now seen corresponding path program 4 times [2024-06-14 14:06:28,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:28,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419992353] [2024-06-14 14:06:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:28,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:28,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:28,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:28,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419992353] [2024-06-14 14:06:28,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419992353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:28,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:28,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:28,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068704013] [2024-06-14 14:06:28,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:28,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:28,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:28,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:28,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:28,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:28,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 164 transitions, 1606 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:28,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:28,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:28,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:28,988 INFO L124 PetriNetUnfolderBase]: 1335/2246 cut-off events. [2024-06-14 14:06:28,988 INFO L125 PetriNetUnfolderBase]: For 41316/41316 co-relation queries the response was YES. [2024-06-14 14:06:28,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13480 conditions, 2246 events. 1335/2246 cut-off events. For 41316/41316 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12331 event pairs, 286 based on Foata normal form. 4/2249 useless extension candidates. Maximal degree in co-relation 13427. Up to 1470 conditions per place. [2024-06-14 14:06:29,005 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 112 selfloop transitions, 102 changer transitions 0/221 dead transitions. [2024-06-14 14:06:29,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 221 transitions, 2548 flow [2024-06-14 14:06:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:29,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:29,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-14 14:06:29,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-14 14:06:29,007 INFO L175 Difference]: Start difference. First operand has 119 places, 164 transitions, 1606 flow. Second operand 10 states and 255 transitions. [2024-06-14 14:06:29,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 221 transitions, 2548 flow [2024-06-14 14:06:29,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 221 transitions, 2494 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:29,046 INFO L231 Difference]: Finished difference. Result has 127 places, 177 transitions, 2017 flow [2024-06-14 14:06:29,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1552, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2017, PETRI_PLACES=127, PETRI_TRANSITIONS=177} [2024-06-14 14:06:29,046 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-14 14:06:29,047 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 177 transitions, 2017 flow [2024-06-14 14:06:29,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:29,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:29,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:29,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 14:06:29,047 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)] === [2024-06-14 14:06:29,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:29,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1787784151, now seen corresponding path program 5 times [2024-06-14 14:06:29,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:29,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865713139] [2024-06-14 14:06:29,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:29,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:29,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:29,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865713139] [2024-06-14 14:06:29,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865713139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:29,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:29,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:29,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217083891] [2024-06-14 14:06:29,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:29,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:29,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:29,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:29,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:29,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:29,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 177 transitions, 2017 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:29,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:29,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:29,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:29,564 INFO L124 PetriNetUnfolderBase]: 1360/2292 cut-off events. [2024-06-14 14:06:29,565 INFO L125 PetriNetUnfolderBase]: For 47406/47406 co-relation queries the response was YES. [2024-06-14 14:06:29,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14652 conditions, 2292 events. 1360/2292 cut-off events. For 47406/47406 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12670 event pairs, 288 based on Foata normal form. 4/2295 useless extension candidates. Maximal degree in co-relation 14597. Up to 1495 conditions per place. [2024-06-14 14:06:29,583 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 121 selfloop transitions, 96 changer transitions 0/224 dead transitions. [2024-06-14 14:06:29,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 224 transitions, 2929 flow [2024-06-14 14:06:29,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:29,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:29,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-14 14:06:29,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216931216931217 [2024-06-14 14:06:29,584 INFO L175 Difference]: Start difference. First operand has 127 places, 177 transitions, 2017 flow. Second operand 9 states and 235 transitions. [2024-06-14 14:06:29,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 224 transitions, 2929 flow [2024-06-14 14:06:29,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 224 transitions, 2782 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:29,636 INFO L231 Difference]: Finished difference. Result has 132 places, 184 transitions, 2223 flow [2024-06-14 14:06:29,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2223, PETRI_PLACES=132, PETRI_TRANSITIONS=184} [2024-06-14 14:06:29,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-14 14:06:29,637 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 184 transitions, 2223 flow [2024-06-14 14:06:29,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:29,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:29,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:29,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 14:06:29,638 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)] === [2024-06-14 14:06:29,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:29,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1814750611, now seen corresponding path program 6 times [2024-06-14 14:06:29,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:29,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760862404] [2024-06-14 14:06:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:29,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:29,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:29,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:29,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760862404] [2024-06-14 14:06:29,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760862404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:29,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:29,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:29,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161079977] [2024-06-14 14:06:29,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:29,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:29,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:29,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:29,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:29,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:29,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 184 transitions, 2223 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:29,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:29,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:29,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:30,158 INFO L124 PetriNetUnfolderBase]: 1353/2283 cut-off events. [2024-06-14 14:06:30,158 INFO L125 PetriNetUnfolderBase]: For 49017/49017 co-relation queries the response was YES. [2024-06-14 14:06:30,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14952 conditions, 2283 events. 1353/2283 cut-off events. For 49017/49017 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 12569 event pairs, 288 based on Foata normal form. 4/2286 useless extension candidates. Maximal degree in co-relation 14894. Up to 1491 conditions per place. [2024-06-14 14:06:30,173 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 121 selfloop transitions, 95 changer transitions 0/223 dead transitions. [2024-06-14 14:06:30,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 223 transitions, 2981 flow [2024-06-14 14:06:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-14 14:06:30,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6164021164021164 [2024-06-14 14:06:30,175 INFO L175 Difference]: Start difference. First operand has 132 places, 184 transitions, 2223 flow. Second operand 9 states and 233 transitions. [2024-06-14 14:06:30,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 223 transitions, 2981 flow [2024-06-14 14:06:30,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 223 transitions, 2733 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:30,228 INFO L231 Difference]: Finished difference. Result has 136 places, 184 transitions, 2176 flow [2024-06-14 14:06:30,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1975, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2176, PETRI_PLACES=136, PETRI_TRANSITIONS=184} [2024-06-14 14:06:30,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-14 14:06:30,229 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 184 transitions, 2176 flow [2024-06-14 14:06:30,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:30,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:30,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:30,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 14:06:30,229 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:30,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:30,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1369063487, now seen corresponding path program 2 times [2024-06-14 14:06:30,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:30,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442716847] [2024-06-14 14:06:30,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:30,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:30,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:30,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:30,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442716847] [2024-06-14 14:06:30,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442716847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:30,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:30,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:30,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846852900] [2024-06-14 14:06:30,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:30,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:30,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:30,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:30,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:30,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 184 transitions, 2176 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:30,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:30,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:30,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:30,831 INFO L124 PetriNetUnfolderBase]: 1419/2402 cut-off events. [2024-06-14 14:06:30,831 INFO L125 PetriNetUnfolderBase]: For 55563/55563 co-relation queries the response was YES. [2024-06-14 14:06:30,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15489 conditions, 2402 events. 1419/2402 cut-off events. For 55563/55563 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13460 event pairs, 300 based on Foata normal form. 14/2415 useless extension candidates. Maximal degree in co-relation 15430. Up to 1819 conditions per place. [2024-06-14 14:06:30,850 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 165 selfloop transitions, 61 changer transitions 0/233 dead transitions. [2024-06-14 14:06:30,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 233 transitions, 3000 flow [2024-06-14 14:06:30,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:30,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:30,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-14 14:06:30,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023809523809524 [2024-06-14 14:06:30,856 INFO L175 Difference]: Start difference. First operand has 136 places, 184 transitions, 2176 flow. Second operand 10 states and 253 transitions. [2024-06-14 14:06:30,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 233 transitions, 3000 flow [2024-06-14 14:06:30,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 233 transitions, 2803 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:30,909 INFO L231 Difference]: Finished difference. Result has 139 places, 187 transitions, 2172 flow [2024-06-14 14:06:30,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1979, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2172, PETRI_PLACES=139, PETRI_TRANSITIONS=187} [2024-06-14 14:06:30,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-14 14:06:30,910 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 187 transitions, 2172 flow [2024-06-14 14:06:30,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:30,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:30,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:30,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 14:06:30,910 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:30,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1548511575, now seen corresponding path program 3 times [2024-06-14 14:06:30,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:30,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546122332] [2024-06-14 14:06:30,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:30,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:31,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:31,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:31,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546122332] [2024-06-14 14:06:31,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546122332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:31,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:31,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:31,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025310921] [2024-06-14 14:06:31,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:31,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:31,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:31,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:31,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:31,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 187 transitions, 2172 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:31,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:31,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:31,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:31,511 INFO L124 PetriNetUnfolderBase]: 1590/2709 cut-off events. [2024-06-14 14:06:31,511 INFO L125 PetriNetUnfolderBase]: For 65397/65397 co-relation queries the response was YES. [2024-06-14 14:06:31,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17291 conditions, 2709 events. 1590/2709 cut-off events. For 65397/65397 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15749 event pairs, 289 based on Foata normal form. 14/2722 useless extension candidates. Maximal degree in co-relation 17231. Up to 1718 conditions per place. [2024-06-14 14:06:31,532 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 171 selfloop transitions, 68 changer transitions 0/246 dead transitions. [2024-06-14 14:06:31,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 246 transitions, 3228 flow [2024-06-14 14:06:31,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:31,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:31,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-14 14:06:31,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-14 14:06:31,533 INFO L175 Difference]: Start difference. First operand has 139 places, 187 transitions, 2172 flow. Second operand 10 states and 258 transitions. [2024-06-14 14:06:31,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 246 transitions, 3228 flow [2024-06-14 14:06:31,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 246 transitions, 3069 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:31,630 INFO L231 Difference]: Finished difference. Result has 142 places, 193 transitions, 2307 flow [2024-06-14 14:06:31,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2013, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2307, PETRI_PLACES=142, PETRI_TRANSITIONS=193} [2024-06-14 14:06:31,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-14 14:06:31,630 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 193 transitions, 2307 flow [2024-06-14 14:06:31,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:31,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:31,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:31,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 14:06:31,631 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:31,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1112562977, now seen corresponding path program 4 times [2024-06-14 14:06:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:31,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908240965] [2024-06-14 14:06:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:31,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:31,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:31,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908240965] [2024-06-14 14:06:31,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908240965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:31,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:31,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:31,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957034259] [2024-06-14 14:06:31,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:31,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:31,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:31,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:31,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:31,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:31,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 193 transitions, 2307 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:31,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:31,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:31,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:32,211 INFO L124 PetriNetUnfolderBase]: 1618/2756 cut-off events. [2024-06-14 14:06:32,211 INFO L125 PetriNetUnfolderBase]: For 69409/69409 co-relation queries the response was YES. [2024-06-14 14:06:32,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17940 conditions, 2756 events. 1618/2756 cut-off events. For 69409/69409 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16078 event pairs, 350 based on Foata normal form. 14/2769 useless extension candidates. Maximal degree in co-relation 17878. Up to 2132 conditions per place. [2024-06-14 14:06:32,231 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 174 selfloop transitions, 56 changer transitions 0/237 dead transitions. [2024-06-14 14:06:32,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 237 transitions, 3118 flow [2024-06-14 14:06:32,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:32,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:32,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-14 14:06:32,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-14 14:06:32,232 INFO L175 Difference]: Start difference. First operand has 142 places, 193 transitions, 2307 flow. Second operand 9 states and 231 transitions. [2024-06-14 14:06:32,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 237 transitions, 3118 flow [2024-06-14 14:06:32,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 237 transitions, 2977 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:32,310 INFO L231 Difference]: Finished difference. Result has 145 places, 195 transitions, 2320 flow [2024-06-14 14:06:32,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2168, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2320, PETRI_PLACES=145, PETRI_TRANSITIONS=195} [2024-06-14 14:06:32,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-14 14:06:32,310 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 195 transitions, 2320 flow [2024-06-14 14:06:32,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:32,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:32,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:32,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 14:06:32,311 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:32,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:32,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1793935685, now seen corresponding path program 2 times [2024-06-14 14:06:32,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:32,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592305107] [2024-06-14 14:06:32,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:32,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:32,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:32,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592305107] [2024-06-14 14:06:32,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592305107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:32,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:32,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:06:32,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966993054] [2024-06-14 14:06:32,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:32,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:06:32,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:32,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:06:32,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:06:32,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:06:32,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 195 transitions, 2320 flow. Second operand has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-14 14:06:32,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:32,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:06:32,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:32,822 INFO L124 PetriNetUnfolderBase]: 1473/2597 cut-off events. [2024-06-14 14:06:32,822 INFO L125 PetriNetUnfolderBase]: For 64210/64220 co-relation queries the response was YES. [2024-06-14 14:06:32,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16807 conditions, 2597 events. 1473/2597 cut-off events. For 64210/64220 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15608 event pairs, 378 based on Foata normal form. 2/2595 useless extension candidates. Maximal degree in co-relation 16743. Up to 2017 conditions per place. [2024-06-14 14:06:32,842 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 159 selfloop transitions, 28 changer transitions 0/212 dead transitions. [2024-06-14 14:06:32,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 212 transitions, 2736 flow [2024-06-14 14:06:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:32,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 14:06:32,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-14 14:06:32,843 INFO L175 Difference]: Start difference. First operand has 145 places, 195 transitions, 2320 flow. Second operand 7 states and 165 transitions. [2024-06-14 14:06:32,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 212 transitions, 2736 flow [2024-06-14 14:06:32,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 212 transitions, 2593 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:32,927 INFO L231 Difference]: Finished difference. Result has 146 places, 195 transitions, 2244 flow [2024-06-14 14:06:32,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2244, PETRI_PLACES=146, PETRI_TRANSITIONS=195} [2024-06-14 14:06:32,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-14 14:06:32,928 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 195 transitions, 2244 flow [2024-06-14 14:06:32,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.333333333333332) internal successors, (104), 6 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) [2024-06-14 14:06:32,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:32,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:32,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 14:06:32,929 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:32,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:32,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1679122985, now seen corresponding path program 1 times [2024-06-14 14:06:32,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:32,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346763517] [2024-06-14 14:06:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:32,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:33,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:33,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:33,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346763517] [2024-06-14 14:06:33,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346763517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:33,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:33,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:33,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743069130] [2024-06-14 14:06:33,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:33,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:33,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:33,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:33,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:33,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:33,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 195 transitions, 2244 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:33,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:33,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:33,384 INFO L124 PetriNetUnfolderBase]: 1604/2721 cut-off events. [2024-06-14 14:06:33,384 INFO L125 PetriNetUnfolderBase]: For 67960/67960 co-relation queries the response was YES. [2024-06-14 14:06:33,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17592 conditions, 2721 events. 1604/2721 cut-off events. For 67960/67960 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15745 event pairs, 377 based on Foata normal form. 2/2722 useless extension candidates. Maximal degree in co-relation 17527. Up to 2382 conditions per place. [2024-06-14 14:06:33,404 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 186 selfloop transitions, 18 changer transitions 0/211 dead transitions. [2024-06-14 14:06:33,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 211 transitions, 2781 flow [2024-06-14 14:06:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 14:06:33,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-14 14:06:33,406 INFO L175 Difference]: Start difference. First operand has 146 places, 195 transitions, 2244 flow. Second operand 5 states and 122 transitions. [2024-06-14 14:06:33,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 211 transitions, 2781 flow [2024-06-14 14:06:33,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 211 transitions, 2703 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:33,474 INFO L231 Difference]: Finished difference. Result has 144 places, 198 transitions, 2253 flow [2024-06-14 14:06:33,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2253, PETRI_PLACES=144, PETRI_TRANSITIONS=198} [2024-06-14 14:06:33,475 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-14 14:06:33,475 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 198 transitions, 2253 flow [2024-06-14 14:06:33,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:33,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:33,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 14:06:33,475 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)] === [2024-06-14 14:06:33,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:33,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1793928741, now seen corresponding path program 2 times [2024-06-14 14:06:33,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:33,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242581910] [2024-06-14 14:06:33,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:33,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:33,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:33,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:33,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242581910] [2024-06-14 14:06:33,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242581910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:33,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:33,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:06:33,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436055342] [2024-06-14 14:06:33,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:33,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:06:33,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:33,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:06:33,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:06:33,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:33,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 198 transitions, 2253 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:33,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:33,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:33,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:33,936 INFO L124 PetriNetUnfolderBase]: 1586/2687 cut-off events. [2024-06-14 14:06:33,936 INFO L125 PetriNetUnfolderBase]: For 70753/70753 co-relation queries the response was YES. [2024-06-14 14:06:33,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17489 conditions, 2687 events. 1586/2687 cut-off events. For 70753/70753 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15485 event pairs, 385 based on Foata normal form. 1/2686 useless extension candidates. Maximal degree in co-relation 17423. Up to 2356 conditions per place. [2024-06-14 14:06:33,954 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 181 selfloop transitions, 19 changer transitions 0/207 dead transitions. [2024-06-14 14:06:33,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 207 transitions, 2675 flow [2024-06-14 14:06:33,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:06:33,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:06:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-14 14:06:33,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 14:06:33,955 INFO L175 Difference]: Start difference. First operand has 144 places, 198 transitions, 2253 flow. Second operand 5 states and 119 transitions. [2024-06-14 14:06:33,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 207 transitions, 2675 flow [2024-06-14 14:06:34,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 207 transitions, 2648 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 14:06:34,028 INFO L231 Difference]: Finished difference. Result has 147 places, 198 transitions, 2270 flow [2024-06-14 14:06:34,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2270, PETRI_PLACES=147, PETRI_TRANSITIONS=198} [2024-06-14 14:06:34,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-14 14:06:34,029 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 198 transitions, 2270 flow [2024-06-14 14:06:34,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:34,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:34,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 14:06:34,029 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)] === [2024-06-14 14:06:34,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:34,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1863986431, now seen corresponding path program 1 times [2024-06-14 14:06:34,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:34,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941880235] [2024-06-14 14:06:34,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:34,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:34,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:34,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:34,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941880235] [2024-06-14 14:06:34,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941880235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:34,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:34,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:34,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805062016] [2024-06-14 14:06:34,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:34,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:34,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:34,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:34,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:34,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:34,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 198 transitions, 2270 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:34,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:34,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:34,682 INFO L124 PetriNetUnfolderBase]: 1628/2754 cut-off events. [2024-06-14 14:06:34,682 INFO L125 PetriNetUnfolderBase]: For 78837/78837 co-relation queries the response was YES. [2024-06-14 14:06:34,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18261 conditions, 2754 events. 1628/2754 cut-off events. For 78837/78837 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 15865 event pairs, 262 based on Foata normal form. 4/2757 useless extension candidates. Maximal degree in co-relation 18194. Up to 2341 conditions per place. [2024-06-14 14:06:34,704 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 213 selfloop transitions, 19 changer transitions 0/239 dead transitions. [2024-06-14 14:06:34,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 239 transitions, 3050 flow [2024-06-14 14:06:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:34,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 14:06:34,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-14 14:06:34,706 INFO L175 Difference]: Start difference. First operand has 147 places, 198 transitions, 2270 flow. Second operand 8 states and 193 transitions. [2024-06-14 14:06:34,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 239 transitions, 3050 flow [2024-06-14 14:06:34,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 239 transitions, 2987 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:34,787 INFO L231 Difference]: Finished difference. Result has 150 places, 202 transitions, 2372 flow [2024-06-14 14:06:34,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2372, PETRI_PLACES=150, PETRI_TRANSITIONS=202} [2024-06-14 14:06:34,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-14 14:06:34,788 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 202 transitions, 2372 flow [2024-06-14 14:06:34,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:34,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:34,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:34,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 14:06:34,788 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)] === [2024-06-14 14:06:34,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:34,789 INFO L85 PathProgramCache]: Analyzing trace with hash -17340307, now seen corresponding path program 2 times [2024-06-14 14:06:34,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:34,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027244302] [2024-06-14 14:06:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:34,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:34,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:34,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027244302] [2024-06-14 14:06:34,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027244302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:34,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:34,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:34,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71125707] [2024-06-14 14:06:34,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:34,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:34,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:34,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:34,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:35,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:35,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 202 transitions, 2372 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:35,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:35,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:35,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:35,425 INFO L124 PetriNetUnfolderBase]: 1620/2742 cut-off events. [2024-06-14 14:06:35,425 INFO L125 PetriNetUnfolderBase]: For 82222/82222 co-relation queries the response was YES. [2024-06-14 14:06:35,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18322 conditions, 2742 events. 1620/2742 cut-off events. For 82222/82222 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 15785 event pairs, 346 based on Foata normal form. 4/2745 useless extension candidates. Maximal degree in co-relation 18254. Up to 2388 conditions per place. [2024-06-14 14:06:35,446 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 210 selfloop transitions, 15 changer transitions 0/232 dead transitions. [2024-06-14 14:06:35,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 232 transitions, 2898 flow [2024-06-14 14:06:35,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:35,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:35,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 14:06:35,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-14 14:06:35,448 INFO L175 Difference]: Start difference. First operand has 150 places, 202 transitions, 2372 flow. Second operand 7 states and 169 transitions. [2024-06-14 14:06:35,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 232 transitions, 2898 flow [2024-06-14 14:06:35,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 232 transitions, 2776 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:35,546 INFO L231 Difference]: Finished difference. Result has 153 places, 202 transitions, 2287 flow [2024-06-14 14:06:35,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2250, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2287, PETRI_PLACES=153, PETRI_TRANSITIONS=202} [2024-06-14 14:06:35,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-14 14:06:35,546 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 202 transitions, 2287 flow [2024-06-14 14:06:35,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:35,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:35,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:35,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 14:06:35,547 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)] === [2024-06-14 14:06:35,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:35,547 INFO L85 PathProgramCache]: Analyzing trace with hash -2147193601, now seen corresponding path program 3 times [2024-06-14 14:06:35,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:35,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707240175] [2024-06-14 14:06:35,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:35,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:35,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:35,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707240175] [2024-06-14 14:06:35,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707240175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:35,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:35,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:35,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519449598] [2024-06-14 14:06:35,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:35,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:35,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:35,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:35,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:35,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:35,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 202 transitions, 2287 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:35,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:35,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:35,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:36,109 INFO L124 PetriNetUnfolderBase]: 1637/2770 cut-off events. [2024-06-14 14:06:36,109 INFO L125 PetriNetUnfolderBase]: For 87249/87251 co-relation queries the response was YES. [2024-06-14 14:06:36,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18453 conditions, 2770 events. 1637/2770 cut-off events. For 87249/87251 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16012 event pairs, 350 based on Foata normal form. 6/2775 useless extension candidates. Maximal degree in co-relation 18383. Up to 2370 conditions per place. [2024-06-14 14:06:36,131 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 197 selfloop transitions, 27 changer transitions 0/231 dead transitions. [2024-06-14 14:06:36,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 231 transitions, 2865 flow [2024-06-14 14:06:36,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:36,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:36,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:06:36,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-14 14:06:36,133 INFO L175 Difference]: Start difference. First operand has 153 places, 202 transitions, 2287 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:06:36,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 231 transitions, 2865 flow [2024-06-14 14:06:36,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 231 transitions, 2830 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:36,214 INFO L231 Difference]: Finished difference. Result has 154 places, 204 transitions, 2379 flow [2024-06-14 14:06:36,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2379, PETRI_PLACES=154, PETRI_TRANSITIONS=204} [2024-06-14 14:06:36,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-14 14:06:36,215 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 204 transitions, 2379 flow [2024-06-14 14:06:36,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:36,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:36,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 14:06:36,216 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)] === [2024-06-14 14:06:36,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:36,216 INFO L85 PathProgramCache]: Analyzing trace with hash -500131359, now seen corresponding path program 4 times [2024-06-14 14:06:36,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:36,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546656578] [2024-06-14 14:06:36,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:36,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:36,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:36,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546656578] [2024-06-14 14:06:36,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546656578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:36,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:36,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:06:36,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720438131] [2024-06-14 14:06:36,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:36,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:06:36,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:36,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:06:36,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:06:36,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:36,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 204 transitions, 2379 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:36,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:36,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:36,810 INFO L124 PetriNetUnfolderBase]: 1629/2757 cut-off events. [2024-06-14 14:06:36,810 INFO L125 PetriNetUnfolderBase]: For 90657/90657 co-relation queries the response was YES. [2024-06-14 14:06:36,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18501 conditions, 2757 events. 1629/2757 cut-off events. For 90657/90657 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15890 event pairs, 344 based on Foata normal form. 4/2760 useless extension candidates. Maximal degree in co-relation 18430. Up to 2358 conditions per place. [2024-06-14 14:06:36,835 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 206 selfloop transitions, 28 changer transitions 0/241 dead transitions. [2024-06-14 14:06:36,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 241 transitions, 3001 flow [2024-06-14 14:06:36,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 14:06:36,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 14:06:36,836 INFO L175 Difference]: Start difference. First operand has 154 places, 204 transitions, 2379 flow. Second operand 9 states and 210 transitions. [2024-06-14 14:06:36,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 241 transitions, 3001 flow [2024-06-14 14:06:36,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 241 transitions, 2892 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:36,924 INFO L231 Difference]: Finished difference. Result has 158 places, 206 transitions, 2403 flow [2024-06-14 14:06:36,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2403, PETRI_PLACES=158, PETRI_TRANSITIONS=206} [2024-06-14 14:06:36,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-14 14:06:36,924 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 206 transitions, 2403 flow [2024-06-14 14:06:36,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:36,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:36,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:36,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 14:06:36,928 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)] === [2024-06-14 14:06:36,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:36,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1101440646, now seen corresponding path program 1 times [2024-06-14 14:06:36,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:36,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083263847] [2024-06-14 14:06:36,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:36,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:37,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:37,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:37,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083263847] [2024-06-14 14:06:37,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083263847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:37,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:37,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:37,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131229723] [2024-06-14 14:06:37,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:37,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:37,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:37,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:37,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:37,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:37,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 206 transitions, 2403 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:37,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:37,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:37,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:37,462 INFO L124 PetriNetUnfolderBase]: 1661/2809 cut-off events. [2024-06-14 14:06:37,462 INFO L125 PetriNetUnfolderBase]: For 95926/95926 co-relation queries the response was YES. [2024-06-14 14:06:37,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18976 conditions, 2809 events. 1661/2809 cut-off events. For 95926/95926 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16217 event pairs, 327 based on Foata normal form. 4/2812 useless extension candidates. Maximal degree in co-relation 18904. Up to 2251 conditions per place. [2024-06-14 14:06:37,485 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 171 selfloop transitions, 66 changer transitions 0/244 dead transitions. [2024-06-14 14:06:37,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 244 transitions, 3244 flow [2024-06-14 14:06:37,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-14 14:06:37,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-14 14:06:37,486 INFO L175 Difference]: Start difference. First operand has 158 places, 206 transitions, 2403 flow. Second operand 9 states and 215 transitions. [2024-06-14 14:06:37,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 244 transitions, 3244 flow [2024-06-14 14:06:37,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 244 transitions, 3129 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:37,579 INFO L231 Difference]: Finished difference. Result has 161 places, 217 transitions, 2623 flow [2024-06-14 14:06:37,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2623, PETRI_PLACES=161, PETRI_TRANSITIONS=217} [2024-06-14 14:06:37,580 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-14 14:06:37,580 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 217 transitions, 2623 flow [2024-06-14 14:06:37,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:37,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:37,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:37,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 14:06:37,581 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:37,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:37,581 INFO L85 PathProgramCache]: Analyzing trace with hash 223022146, now seen corresponding path program 2 times [2024-06-14 14:06:37,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:37,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400358185] [2024-06-14 14:06:37,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:37,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:37,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:37,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400358185] [2024-06-14 14:06:37,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400358185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:37,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:37,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:37,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456814049] [2024-06-14 14:06:37,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:37,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:37,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:37,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:37,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:37,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:37,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 217 transitions, 2623 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:37,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:37,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:37,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:38,113 INFO L124 PetriNetUnfolderBase]: 1671/2826 cut-off events. [2024-06-14 14:06:38,113 INFO L125 PetriNetUnfolderBase]: For 98786/98786 co-relation queries the response was YES. [2024-06-14 14:06:38,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19366 conditions, 2826 events. 1671/2826 cut-off events. For 98786/98786 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16348 event pairs, 336 based on Foata normal form. 2/2826 useless extension candidates. Maximal degree in co-relation 19292. Up to 2257 conditions per place. [2024-06-14 14:06:38,135 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 158 selfloop transitions, 77 changer transitions 0/242 dead transitions. [2024-06-14 14:06:38,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 242 transitions, 3425 flow [2024-06-14 14:06:38,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:38,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:38,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 14:06:38,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-14 14:06:38,136 INFO L175 Difference]: Start difference. First operand has 161 places, 217 transitions, 2623 flow. Second operand 8 states and 194 transitions. [2024-06-14 14:06:38,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 242 transitions, 3425 flow [2024-06-14 14:06:38,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 242 transitions, 3328 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:38,223 INFO L231 Difference]: Finished difference. Result has 164 places, 221 transitions, 2759 flow [2024-06-14 14:06:38,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2528, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2759, PETRI_PLACES=164, PETRI_TRANSITIONS=221} [2024-06-14 14:06:38,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-14 14:06:38,223 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 221 transitions, 2759 flow [2024-06-14 14:06:38,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:38,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:38,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:38,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 14:06:38,224 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:38,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:38,224 INFO L85 PathProgramCache]: Analyzing trace with hash 517847732, now seen corresponding path program 3 times [2024-06-14 14:06:38,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:38,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534827958] [2024-06-14 14:06:38,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:38,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:38,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:38,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:38,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534827958] [2024-06-14 14:06:38,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534827958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:38,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:38,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:38,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903915019] [2024-06-14 14:06:38,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:38,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:38,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:38,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:38,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 221 transitions, 2759 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:38,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:38,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:38,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:38,811 INFO L124 PetriNetUnfolderBase]: 1667/2822 cut-off events. [2024-06-14 14:06:38,811 INFO L125 PetriNetUnfolderBase]: For 102828/102828 co-relation queries the response was YES. [2024-06-14 14:06:38,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19448 conditions, 2822 events. 1667/2822 cut-off events. For 102828/102828 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 16330 event pairs, 336 based on Foata normal form. 2/2822 useless extension candidates. Maximal degree in co-relation 19373. Up to 2256 conditions per place. [2024-06-14 14:06:38,835 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 163 selfloop transitions, 73 changer transitions 0/243 dead transitions. [2024-06-14 14:06:38,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 243 transitions, 3499 flow [2024-06-14 14:06:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:38,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:38,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-14 14:06:38,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-14 14:06:38,837 INFO L175 Difference]: Start difference. First operand has 164 places, 221 transitions, 2759 flow. Second operand 9 states and 212 transitions. [2024-06-14 14:06:38,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 243 transitions, 3499 flow [2024-06-14 14:06:38,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 243 transitions, 3321 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:38,934 INFO L231 Difference]: Finished difference. Result has 167 places, 221 transitions, 2736 flow [2024-06-14 14:06:38,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2736, PETRI_PLACES=167, PETRI_TRANSITIONS=221} [2024-06-14 14:06:38,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-14 14:06:38,934 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 221 transitions, 2736 flow [2024-06-14 14:06:38,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:38,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:38,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:38,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 14:06:38,935 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:38,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:38,935 INFO L85 PathProgramCache]: Analyzing trace with hash -441904046, now seen corresponding path program 1 times [2024-06-14 14:06:38,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:38,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307020176] [2024-06-14 14:06:38,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:38,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:39,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:39,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307020176] [2024-06-14 14:06:39,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307020176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:39,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:39,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:39,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977223811] [2024-06-14 14:06:39,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:39,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:39,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:39,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:39,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:39,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:06:39,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 221 transitions, 2736 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-14 14:06:39,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:39,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:06:39,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:39,478 INFO L124 PetriNetUnfolderBase]: 1564/2734 cut-off events. [2024-06-14 14:06:39,478 INFO L125 PetriNetUnfolderBase]: For 110548/110572 co-relation queries the response was YES. [2024-06-14 14:06:39,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18508 conditions, 2734 events. 1564/2734 cut-off events. For 110548/110572 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 16340 event pairs, 337 based on Foata normal form. 12/2736 useless extension candidates. Maximal degree in co-relation 18434. Up to 2107 conditions per place. [2024-06-14 14:06:39,501 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 184 selfloop transitions, 32 changer transitions 0/245 dead transitions. [2024-06-14 14:06:39,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 245 transitions, 3262 flow [2024-06-14 14:06:39,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:06:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:06:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 14:06:39,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 14:06:39,502 INFO L175 Difference]: Start difference. First operand has 167 places, 221 transitions, 2736 flow. Second operand 8 states and 186 transitions. [2024-06-14 14:06:39,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 245 transitions, 3262 flow [2024-06-14 14:06:39,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 245 transitions, 3061 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:39,597 INFO L231 Difference]: Finished difference. Result has 167 places, 223 transitions, 2636 flow [2024-06-14 14:06:39,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2535, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2636, PETRI_PLACES=167, PETRI_TRANSITIONS=223} [2024-06-14 14:06:39,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 124 predicate places. [2024-06-14 14:06:39,598 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 223 transitions, 2636 flow [2024-06-14 14:06:39,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 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) [2024-06-14 14:06:39,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:39,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:39,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 14:06:39,598 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:39,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:39,599 INFO L85 PathProgramCache]: Analyzing trace with hash -541209634, now seen corresponding path program 1 times [2024-06-14 14:06:39,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:39,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677695548] [2024-06-14 14:06:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:39,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:39,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:39,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677695548] [2024-06-14 14:06:39,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677695548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:39,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:39,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:39,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84959888] [2024-06-14 14:06:39,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:39,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:39,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:39,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:39,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:39,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:39,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 223 transitions, 2636 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:39,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:39,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:39,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:40,394 INFO L124 PetriNetUnfolderBase]: 2312/3887 cut-off events. [2024-06-14 14:06:40,394 INFO L125 PetriNetUnfolderBase]: For 199748/199748 co-relation queries the response was YES. [2024-06-14 14:06:40,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27656 conditions, 3887 events. 2312/3887 cut-off events. For 199748/199748 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 23749 event pairs, 404 based on Foata normal form. 42/3926 useless extension candidates. Maximal degree in co-relation 27582. Up to 2361 conditions per place. [2024-06-14 14:06:40,426 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 238 selfloop transitions, 46 changer transitions 0/291 dead transitions. [2024-06-14 14:06:40,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 291 transitions, 3902 flow [2024-06-14 14:06:40,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:40,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-14 14:06:40,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-14 14:06:40,428 INFO L175 Difference]: Start difference. First operand has 167 places, 223 transitions, 2636 flow. Second operand 10 states and 261 transitions. [2024-06-14 14:06:40,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 291 transitions, 3902 flow [2024-06-14 14:06:40,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 291 transitions, 3825 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:40,598 INFO L231 Difference]: Finished difference. Result has 173 places, 229 transitions, 2825 flow [2024-06-14 14:06:40,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2559, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2825, PETRI_PLACES=173, PETRI_TRANSITIONS=229} [2024-06-14 14:06:40,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-14 14:06:40,599 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 229 transitions, 2825 flow [2024-06-14 14:06:40,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:40,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:40,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:40,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 14:06:40,600 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:40,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:40,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1950879756, now seen corresponding path program 2 times [2024-06-14 14:06:40,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:40,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13067678] [2024-06-14 14:06:40,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:40,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:40,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:40,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:40,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:40,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13067678] [2024-06-14 14:06:40,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13067678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:40,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:40,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:40,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607815009] [2024-06-14 14:06:40,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:40,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:40,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:40,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:40,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:40,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:40,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 229 transitions, 2825 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:40,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:40,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:40,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:41,427 INFO L124 PetriNetUnfolderBase]: 2470/4213 cut-off events. [2024-06-14 14:06:41,427 INFO L125 PetriNetUnfolderBase]: For 215894/215894 co-relation queries the response was YES. [2024-06-14 14:06:41,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29694 conditions, 4213 events. 2470/4213 cut-off events. For 215894/215894 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26539 event pairs, 619 based on Foata normal form. 42/4252 useless extension candidates. Maximal degree in co-relation 29617. Up to 2917 conditions per place. [2024-06-14 14:06:41,461 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 233 selfloop transitions, 43 changer transitions 0/283 dead transitions. [2024-06-14 14:06:41,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 283 transitions, 3915 flow [2024-06-14 14:06:41,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:41,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:41,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-14 14:06:41,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-14 14:06:41,462 INFO L175 Difference]: Start difference. First operand has 173 places, 229 transitions, 2825 flow. Second operand 9 states and 232 transitions. [2024-06-14 14:06:41,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 283 transitions, 3915 flow [2024-06-14 14:06:41,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 283 transitions, 3804 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:41,685 INFO L231 Difference]: Finished difference. Result has 178 places, 233 transitions, 2941 flow [2024-06-14 14:06:41,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2714, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2941, PETRI_PLACES=178, PETRI_TRANSITIONS=233} [2024-06-14 14:06:41,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-14 14:06:41,685 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 233 transitions, 2941 flow [2024-06-14 14:06:41,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:41,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:41,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:41,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 14:06:41,686 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:41,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:41,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2037719436, now seen corresponding path program 3 times [2024-06-14 14:06:41,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:41,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132612052] [2024-06-14 14:06:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:41,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:41,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:41,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132612052] [2024-06-14 14:06:41,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132612052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:41,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:41,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:41,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487156817] [2024-06-14 14:06:41,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:41,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:41,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:41,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:41,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:41,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:41,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 233 transitions, 2941 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:41,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:41,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:41,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:42,538 INFO L124 PetriNetUnfolderBase]: 2454/4209 cut-off events. [2024-06-14 14:06:42,538 INFO L125 PetriNetUnfolderBase]: For 205189/205189 co-relation queries the response was YES. [2024-06-14 14:06:42,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28320 conditions, 4209 events. 2454/4209 cut-off events. For 205189/205189 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 26738 event pairs, 691 based on Foata normal form. 50/4258 useless extension candidates. Maximal degree in co-relation 28240. Up to 3393 conditions per place. [2024-06-14 14:06:42,576 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 226 selfloop transitions, 43 changer transitions 0/276 dead transitions. [2024-06-14 14:06:42,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 276 transitions, 3755 flow [2024-06-14 14:06:42,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-14 14:06:42,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-14 14:06:42,578 INFO L175 Difference]: Start difference. First operand has 178 places, 233 transitions, 2941 flow. Second operand 9 states and 226 transitions. [2024-06-14 14:06:42,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 276 transitions, 3755 flow [2024-06-14 14:06:42,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 276 transitions, 3644 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:42,795 INFO L231 Difference]: Finished difference. Result has 182 places, 235 transitions, 3003 flow [2024-06-14 14:06:42,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2830, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3003, PETRI_PLACES=182, PETRI_TRANSITIONS=235} [2024-06-14 14:06:42,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-14 14:06:42,796 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 235 transitions, 3003 flow [2024-06-14 14:06:42,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:42,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:42,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:42,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 14:06:42,796 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:42,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:42,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1939041238, now seen corresponding path program 4 times [2024-06-14 14:06:42,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:42,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33771023] [2024-06-14 14:06:42,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:42,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:42,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:42,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:42,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33771023] [2024-06-14 14:06:42,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33771023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:42,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:42,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:42,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775724653] [2024-06-14 14:06:42,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:42,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:42,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:42,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:42,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:43,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:43,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 235 transitions, 3003 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:43,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:43,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:43,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:43,667 INFO L124 PetriNetUnfolderBase]: 2651/4555 cut-off events. [2024-06-14 14:06:43,667 INFO L125 PetriNetUnfolderBase]: For 215451/215451 co-relation queries the response was YES. [2024-06-14 14:06:43,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29981 conditions, 4555 events. 2651/4555 cut-off events. For 215451/215451 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 29556 event pairs, 748 based on Foata normal form. 50/4603 useless extension candidates. Maximal degree in co-relation 29899. Up to 3289 conditions per place. [2024-06-14 14:06:43,776 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 151 selfloop transitions, 119 changer transitions 0/277 dead transitions. [2024-06-14 14:06:43,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 277 transitions, 3979 flow [2024-06-14 14:06:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:43,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-14 14:06:43,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-14 14:06:43,777 INFO L175 Difference]: Start difference. First operand has 182 places, 235 transitions, 3003 flow. Second operand 9 states and 234 transitions. [2024-06-14 14:06:43,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 277 transitions, 3979 flow [2024-06-14 14:06:43,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 277 transitions, 3846 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:43,964 INFO L231 Difference]: Finished difference. Result has 184 places, 237 transitions, 3193 flow [2024-06-14 14:06:43,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2870, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3193, PETRI_PLACES=184, PETRI_TRANSITIONS=237} [2024-06-14 14:06:43,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-14 14:06:43,965 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 237 transitions, 3193 flow [2024-06-14 14:06:43,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:43,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:43,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:43,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 14:06:43,966 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:43,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:43,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1316778410, now seen corresponding path program 5 times [2024-06-14 14:06:43,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:43,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801367003] [2024-06-14 14:06:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:43,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:44,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:44,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801367003] [2024-06-14 14:06:44,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801367003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:44,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:44,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:44,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316675386] [2024-06-14 14:06:44,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:44,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:44,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:44,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:44,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:44,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:44,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 237 transitions, 3193 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:44,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:44,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:44,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:44,815 INFO L124 PetriNetUnfolderBase]: 2848/4905 cut-off events. [2024-06-14 14:06:44,816 INFO L125 PetriNetUnfolderBase]: For 229372/229372 co-relation queries the response was YES. [2024-06-14 14:06:44,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31996 conditions, 4905 events. 2848/4905 cut-off events. For 229372/229372 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 32282 event pairs, 834 based on Foata normal form. 50/4953 useless extension candidates. Maximal degree in co-relation 31913. Up to 3628 conditions per place. [2024-06-14 14:06:44,863 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 159 selfloop transitions, 114 changer transitions 0/280 dead transitions. [2024-06-14 14:06:44,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 280 transitions, 4271 flow [2024-06-14 14:06:44,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:44,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-14 14:06:44,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216931216931217 [2024-06-14 14:06:44,864 INFO L175 Difference]: Start difference. First operand has 184 places, 237 transitions, 3193 flow. Second operand 9 states and 235 transitions. [2024-06-14 14:06:44,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 280 transitions, 4271 flow [2024-06-14 14:06:45,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 280 transitions, 3980 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:45,086 INFO L231 Difference]: Finished difference. Result has 186 places, 239 transitions, 3219 flow [2024-06-14 14:06:45,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2902, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3219, PETRI_PLACES=186, PETRI_TRANSITIONS=239} [2024-06-14 14:06:45,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-14 14:06:45,087 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 239 transitions, 3219 flow [2024-06-14 14:06:45,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:45,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:45,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:45,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 14:06:45,087 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:45,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:45,087 INFO L85 PathProgramCache]: Analyzing trace with hash 721408908, now seen corresponding path program 6 times [2024-06-14 14:06:45,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:45,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461142107] [2024-06-14 14:06:45,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:45,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:45,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:45,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:45,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461142107] [2024-06-14 14:06:45,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461142107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:45,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:45,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:45,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344093525] [2024-06-14 14:06:45,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:45,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:45,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:45,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:45,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:45,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:45,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 239 transitions, 3219 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:45,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:45,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:45,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:46,025 INFO L124 PetriNetUnfolderBase]: 3111/5372 cut-off events. [2024-06-14 14:06:46,025 INFO L125 PetriNetUnfolderBase]: For 245338/245338 co-relation queries the response was YES. [2024-06-14 14:06:46,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35059 conditions, 5372 events. 3111/5372 cut-off events. For 245338/245338 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 36167 event pairs, 870 based on Foata normal form. 42/5412 useless extension candidates. Maximal degree in co-relation 34975. Up to 3273 conditions per place. [2024-06-14 14:06:46,073 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 168 selfloop transitions, 116 changer transitions 0/291 dead transitions. [2024-06-14 14:06:46,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 291 transitions, 4505 flow [2024-06-14 14:06:46,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:46,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:46,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-14 14:06:46,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-14 14:06:46,074 INFO L175 Difference]: Start difference. First operand has 186 places, 239 transitions, 3219 flow. Second operand 9 states and 240 transitions. [2024-06-14 14:06:46,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 291 transitions, 4505 flow [2024-06-14 14:06:46,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 291 transitions, 4222 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:46,332 INFO L231 Difference]: Finished difference. Result has 189 places, 243 transitions, 3330 flow [2024-06-14 14:06:46,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2936, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3330, PETRI_PLACES=189, PETRI_TRANSITIONS=243} [2024-06-14 14:06:46,333 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-14 14:06:46,333 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 243 transitions, 3330 flow [2024-06-14 14:06:46,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:46,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:46,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:46,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 14:06:46,333 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:46,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:46,334 INFO L85 PathProgramCache]: Analyzing trace with hash 666333982, now seen corresponding path program 1 times [2024-06-14 14:06:46,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:46,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909022920] [2024-06-14 14:06:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:46,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:46,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:46,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:46,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909022920] [2024-06-14 14:06:46,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909022920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:46,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:46,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:46,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926777740] [2024-06-14 14:06:46,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:46,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:46,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:46,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:46,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:46,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:46,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 243 transitions, 3330 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:46,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:46,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:46,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:47,286 INFO L124 PetriNetUnfolderBase]: 3269/5686 cut-off events. [2024-06-14 14:06:47,286 INFO L125 PetriNetUnfolderBase]: For 267903/267903 co-relation queries the response was YES. [2024-06-14 14:06:47,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36562 conditions, 5686 events. 3269/5686 cut-off events. For 267903/267903 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 39219 event pairs, 924 based on Foata normal form. 42/5723 useless extension candidates. Maximal degree in co-relation 36476. Up to 3337 conditions per place. [2024-06-14 14:06:47,336 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 157 selfloop transitions, 127 changer transitions 0/291 dead transitions. [2024-06-14 14:06:47,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 291 transitions, 4398 flow [2024-06-14 14:06:47,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:06:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:06:47,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-14 14:06:47,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-06-14 14:06:47,340 INFO L175 Difference]: Start difference. First operand has 189 places, 243 transitions, 3330 flow. Second operand 9 states and 238 transitions. [2024-06-14 14:06:47,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 291 transitions, 4398 flow [2024-06-14 14:06:47,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 291 transitions, 4162 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-14 14:06:47,630 INFO L231 Difference]: Finished difference. Result has 193 places, 245 transitions, 3443 flow [2024-06-14 14:06:47,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3443, PETRI_PLACES=193, PETRI_TRANSITIONS=245} [2024-06-14 14:06:47,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-14 14:06:47,631 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 245 transitions, 3443 flow [2024-06-14 14:06:47,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:47,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:47,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:47,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 14:06:47,632 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)] === [2024-06-14 14:06:47,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:47,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1228136626, now seen corresponding path program 1 times [2024-06-14 14:06:47,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:47,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787997430] [2024-06-14 14:06:47,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:47,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:47,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:47,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:47,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787997430] [2024-06-14 14:06:47,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787997430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:47,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:47,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:47,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760225530] [2024-06-14 14:06:47,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:47,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:47,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:47,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:47,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:47,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:47,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 245 transitions, 3443 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:47,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:47,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:47,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:48,466 INFO L124 PetriNetUnfolderBase]: 3263/5654 cut-off events. [2024-06-14 14:06:48,466 INFO L125 PetriNetUnfolderBase]: For 226628/226628 co-relation queries the response was YES. [2024-06-14 14:06:48,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36582 conditions, 5654 events. 3263/5654 cut-off events. For 226628/226628 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 38679 event pairs, 1070 based on Foata normal form. 2/5654 useless extension candidates. Maximal degree in co-relation 36494. Up to 4959 conditions per place. [2024-06-14 14:06:48,515 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 193 selfloop transitions, 68 changer transitions 0/268 dead transitions. [2024-06-14 14:06:48,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 268 transitions, 4291 flow [2024-06-14 14:06:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:48,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:06:48,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-14 14:06:48,516 INFO L175 Difference]: Start difference. First operand has 193 places, 245 transitions, 3443 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:06:48,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 268 transitions, 4291 flow [2024-06-14 14:06:48,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 268 transitions, 3972 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 14:06:48,827 INFO L231 Difference]: Finished difference. Result has 193 places, 245 transitions, 3268 flow [2024-06-14 14:06:48,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3268, PETRI_PLACES=193, PETRI_TRANSITIONS=245} [2024-06-14 14:06:48,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-14 14:06:48,827 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 245 transitions, 3268 flow [2024-06-14 14:06:48,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:48,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:48,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:48,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 14:06:48,828 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)] === [2024-06-14 14:06:48,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:48,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1961919640, now seen corresponding path program 2 times [2024-06-14 14:06:48,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:48,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334631270] [2024-06-14 14:06:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:48,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:48,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:48,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:48,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334631270] [2024-06-14 14:06:48,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334631270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:48,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:49,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:06:49,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013063065] [2024-06-14 14:06:49,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:49,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:06:49,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:49,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:06:49,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:06:49,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:49,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 245 transitions, 3268 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:49,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:49,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:49,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:49,684 INFO L124 PetriNetUnfolderBase]: 3284/5697 cut-off events. [2024-06-14 14:06:49,684 INFO L125 PetriNetUnfolderBase]: For 233416/233416 co-relation queries the response was YES. [2024-06-14 14:06:49,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36279 conditions, 5697 events. 3284/5697 cut-off events. For 233416/233416 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 39098 event pairs, 1075 based on Foata normal form. 1/5696 useless extension candidates. Maximal degree in co-relation 36190. Up to 4970 conditions per place. [2024-06-14 14:06:49,731 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 78 changer transitions 0/273 dead transitions. [2024-06-14 14:06:49,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 273 transitions, 4254 flow [2024-06-14 14:06:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:06:49,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:06:49,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:06:49,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-14 14:06:49,733 INFO L175 Difference]: Start difference. First operand has 193 places, 245 transitions, 3268 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:06:49,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 273 transitions, 4254 flow [2024-06-14 14:06:50,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 273 transitions, 4126 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 14:06:50,022 INFO L231 Difference]: Finished difference. Result has 197 places, 253 transitions, 3453 flow [2024-06-14 14:06:50,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3150, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3453, PETRI_PLACES=197, PETRI_TRANSITIONS=253} [2024-06-14 14:06:50,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-14 14:06:50,023 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 253 transitions, 3453 flow [2024-06-14 14:06:50,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:50,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:50,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:50,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 14:06:50,023 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:50,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:50,024 INFO L85 PathProgramCache]: Analyzing trace with hash -735865050, now seen corresponding path program 7 times [2024-06-14 14:06:50,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:50,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485064330] [2024-06-14 14:06:50,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:50,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:50,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:50,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:50,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485064330] [2024-06-14 14:06:50,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485064330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:50,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:50,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:50,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322983124] [2024-06-14 14:06:50,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:50,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:50,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:50,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:50,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:50,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:50,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 253 transitions, 3453 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:50,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:50,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:50,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:51,135 INFO L124 PetriNetUnfolderBase]: 3471/6017 cut-off events. [2024-06-14 14:06:51,135 INFO L125 PetriNetUnfolderBase]: For 302208/302208 co-relation queries the response was YES. [2024-06-14 14:06:51,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38248 conditions, 6017 events. 3471/6017 cut-off events. For 302208/302208 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 41821 event pairs, 1117 based on Foata normal form. 50/6066 useless extension candidates. Maximal degree in co-relation 38157. Up to 4678 conditions per place. [2024-06-14 14:06:51,192 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 122 changer transitions 0/305 dead transitions. [2024-06-14 14:06:51,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 305 transitions, 4469 flow [2024-06-14 14:06:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:06:51,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:06:51,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 278 transitions. [2024-06-14 14:06:51,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6017316017316018 [2024-06-14 14:06:51,194 INFO L175 Difference]: Start difference. First operand has 197 places, 253 transitions, 3453 flow. Second operand 11 states and 278 transitions. [2024-06-14 14:06:51,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 305 transitions, 4469 flow [2024-06-14 14:06:51,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 305 transitions, 4380 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-14 14:06:51,540 INFO L231 Difference]: Finished difference. Result has 205 places, 255 transitions, 3709 flow [2024-06-14 14:06:51,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3709, PETRI_PLACES=205, PETRI_TRANSITIONS=255} [2024-06-14 14:06:51,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-14 14:06:51,540 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 255 transitions, 3709 flow [2024-06-14 14:06:51,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:51,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:51,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:51,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 14:06:51,541 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:51,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:51,541 INFO L85 PathProgramCache]: Analyzing trace with hash -19276758, now seen corresponding path program 8 times [2024-06-14 14:06:51,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:51,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632544229] [2024-06-14 14:06:51,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:51,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:51,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:51,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:51,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632544229] [2024-06-14 14:06:51,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632544229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:51,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:51,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:51,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905898156] [2024-06-14 14:06:51,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:51,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:51,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:51,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:51,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:51,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 255 transitions, 3709 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:51,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:51,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:51,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:52,642 INFO L124 PetriNetUnfolderBase]: 3668/6356 cut-off events. [2024-06-14 14:06:52,642 INFO L125 PetriNetUnfolderBase]: For 324951/324951 co-relation queries the response was YES. [2024-06-14 14:06:52,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40787 conditions, 6356 events. 3668/6356 cut-off events. For 324951/324951 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 44691 event pairs, 1190 based on Foata normal form. 50/6405 useless extension candidates. Maximal degree in co-relation 40695. Up to 5005 conditions per place. [2024-06-14 14:06:52,691 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 186 selfloop transitions, 110 changer transitions 0/303 dead transitions. [2024-06-14 14:06:52,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 303 transitions, 4719 flow [2024-06-14 14:06:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:52,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:52,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-14 14:06:52,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611904761904762 [2024-06-14 14:06:52,692 INFO L175 Difference]: Start difference. First operand has 205 places, 255 transitions, 3709 flow. Second operand 10 states and 257 transitions. [2024-06-14 14:06:52,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 303 transitions, 4719 flow [2024-06-14 14:06:53,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 303 transitions, 4408 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-14 14:06:53,105 INFO L231 Difference]: Finished difference. Result has 206 places, 257 transitions, 3723 flow [2024-06-14 14:06:53,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3723, PETRI_PLACES=206, PETRI_TRANSITIONS=257} [2024-06-14 14:06:53,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-14 14:06:53,105 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 257 transitions, 3723 flow [2024-06-14 14:06:53,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:53,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:53,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:53,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 14:06:53,106 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:53,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:53,106 INFO L85 PathProgramCache]: Analyzing trace with hash -218578548, now seen corresponding path program 9 times [2024-06-14 14:06:53,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:53,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160433480] [2024-06-14 14:06:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:53,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:53,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:53,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160433480] [2024-06-14 14:06:53,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160433480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:53,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:53,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:53,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323272282] [2024-06-14 14:06:53,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:53,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:53,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:53,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:53,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:53,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:53,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 257 transitions, 3723 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:53,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:53,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:53,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:54,268 INFO L124 PetriNetUnfolderBase]: 3865/6707 cut-off events. [2024-06-14 14:06:54,268 INFO L125 PetriNetUnfolderBase]: For 343360/343360 co-relation queries the response was YES. [2024-06-14 14:06:54,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42462 conditions, 6707 events. 3865/6707 cut-off events. For 343360/343360 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 47703 event pairs, 1263 based on Foata normal form. 50/6756 useless extension candidates. Maximal degree in co-relation 42369. Up to 5344 conditions per place. [2024-06-14 14:06:54,319 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 109 changer transitions 0/306 dead transitions. [2024-06-14 14:06:54,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 306 transitions, 4847 flow [2024-06-14 14:06:54,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:54,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-14 14:06:54,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.611904761904762 [2024-06-14 14:06:54,320 INFO L175 Difference]: Start difference. First operand has 206 places, 257 transitions, 3723 flow. Second operand 10 states and 257 transitions. [2024-06-14 14:06:54,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 306 transitions, 4847 flow [2024-06-14 14:06:54,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 306 transitions, 4556 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:54,829 INFO L231 Difference]: Finished difference. Result has 208 places, 259 transitions, 3759 flow [2024-06-14 14:06:54,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3432, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3759, PETRI_PLACES=208, PETRI_TRANSITIONS=259} [2024-06-14 14:06:54,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-14 14:06:54,830 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 259 transitions, 3759 flow [2024-06-14 14:06:54,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:54,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:54,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:54,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 14:06:54,832 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:54,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:54,832 INFO L85 PathProgramCache]: Analyzing trace with hash -480875516, now seen corresponding path program 10 times [2024-06-14 14:06:54,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:54,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380831418] [2024-06-14 14:06:54,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:54,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:54,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:54,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380831418] [2024-06-14 14:06:54,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380831418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:54,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:54,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:54,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096551792] [2024-06-14 14:06:54,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:54,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:54,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:54,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:54,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:55,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:55,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 259 transitions, 3759 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:55,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:55,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:55,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:56,028 INFO L124 PetriNetUnfolderBase]: 4204/7302 cut-off events. [2024-06-14 14:06:56,028 INFO L125 PetriNetUnfolderBase]: For 393141/393141 co-relation queries the response was YES. [2024-06-14 14:06:56,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46770 conditions, 7302 events. 4204/7302 cut-off events. For 393141/393141 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 52982 event pairs, 1337 based on Foata normal form. 42/7343 useless extension candidates. Maximal degree in co-relation 46676. Up to 4575 conditions per place. [2024-06-14 14:06:56,201 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 198 selfloop transitions, 112 changer transitions 0/317 dead transitions. [2024-06-14 14:06:56,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 317 transitions, 5115 flow [2024-06-14 14:06:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-06-14 14:06:56,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-06-14 14:06:56,202 INFO L175 Difference]: Start difference. First operand has 208 places, 259 transitions, 3759 flow. Second operand 10 states and 262 transitions. [2024-06-14 14:06:56,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 317 transitions, 5115 flow [2024-06-14 14:06:56,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 317 transitions, 4822 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-14 14:06:56,680 INFO L231 Difference]: Finished difference. Result has 211 places, 263 transitions, 3888 flow [2024-06-14 14:06:56,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3888, PETRI_PLACES=211, PETRI_TRANSITIONS=263} [2024-06-14 14:06:56,681 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-14 14:06:56,681 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 263 transitions, 3888 flow [2024-06-14 14:06:56,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:56,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:56,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:56,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 14:06:56,681 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:56,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash -273801344, now seen corresponding path program 2 times [2024-06-14 14:06:56,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:56,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207604392] [2024-06-14 14:06:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:56,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:56,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:56,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:56,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207604392] [2024-06-14 14:06:56,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207604392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:56,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:56,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:56,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903981008] [2024-06-14 14:06:56,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:56,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:56,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:56,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:56,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:56,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:56,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 263 transitions, 3888 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:56,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:56,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:56,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:06:58,076 INFO L124 PetriNetUnfolderBase]: 4362/7618 cut-off events. [2024-06-14 14:06:58,076 INFO L125 PetriNetUnfolderBase]: For 408888/408888 co-relation queries the response was YES. [2024-06-14 14:06:58,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48269 conditions, 7618 events. 4362/7618 cut-off events. For 408888/408888 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 56108 event pairs, 1435 based on Foata normal form. 42/7659 useless extension candidates. Maximal degree in co-relation 48173. Up to 5505 conditions per place. [2024-06-14 14:06:58,143 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 194 selfloop transitions, 116 changer transitions 0/317 dead transitions. [2024-06-14 14:06:58,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 317 transitions, 4984 flow [2024-06-14 14:06:58,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:06:58,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:06:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 261 transitions. [2024-06-14 14:06:58,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-14 14:06:58,144 INFO L175 Difference]: Start difference. First operand has 211 places, 263 transitions, 3888 flow. Second operand 10 states and 261 transitions. [2024-06-14 14:06:58,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 317 transitions, 4984 flow [2024-06-14 14:06:58,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 317 transitions, 4735 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 14:06:58,549 INFO L231 Difference]: Finished difference. Result has 215 places, 265 transitions, 3986 flow [2024-06-14 14:06:58,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3639, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3986, PETRI_PLACES=215, PETRI_TRANSITIONS=265} [2024-06-14 14:06:58,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-14 14:06:58,550 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 265 transitions, 3986 flow [2024-06-14 14:06:58,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:58,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:06:58,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:06:58,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 14:06:58,550 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:06:58,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:06:58,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1410052894, now seen corresponding path program 3 times [2024-06-14 14:06:58,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:06:58,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561814460] [2024-06-14 14:06:58,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:06:58,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:06:58,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:06:58,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:06:58,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:06:58,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561814460] [2024-06-14 14:06:58,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561814460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:06:58,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:06:58,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:06:58,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751246358] [2024-06-14 14:06:58,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:06:58,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:06:58,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:06:58,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:06:58,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:06:58,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:06:58,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 265 transitions, 3986 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:06:58,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:06:58,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:06:58,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:00,047 INFO L124 PetriNetUnfolderBase]: 4513/7906 cut-off events. [2024-06-14 14:07:00,047 INFO L125 PetriNetUnfolderBase]: For 421789/421789 co-relation queries the response was YES. [2024-06-14 14:07:00,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49680 conditions, 7906 events. 4513/7906 cut-off events. For 421789/421789 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 58834 event pairs, 1518 based on Foata normal form. 42/7947 useless extension candidates. Maximal degree in co-relation 49582. Up to 6117 conditions per place. [2024-06-14 14:07:00,125 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 126 changer transitions 0/323 dead transitions. [2024-06-14 14:07:00,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 323 transitions, 5112 flow [2024-06-14 14:07:00,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:00,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 283 transitions. [2024-06-14 14:07:00,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125541125541125 [2024-06-14 14:07:00,126 INFO L175 Difference]: Start difference. First operand has 215 places, 265 transitions, 3986 flow. Second operand 11 states and 283 transitions. [2024-06-14 14:07:00,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 323 transitions, 5112 flow [2024-06-14 14:07:00,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 323 transitions, 4795 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:00,746 INFO L231 Difference]: Finished difference. Result has 218 places, 267 transitions, 4040 flow [2024-06-14 14:07:00,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3669, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4040, PETRI_PLACES=218, PETRI_TRANSITIONS=267} [2024-06-14 14:07:00,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-14 14:07:00,747 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 267 transitions, 4040 flow [2024-06-14 14:07:00,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:00,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:00,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:00,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 14:07:00,747 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:07:00,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:00,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1971913502, now seen corresponding path program 4 times [2024-06-14 14:07:00,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:00,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621587058] [2024-06-14 14:07:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:00,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:00,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:00,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:00,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621587058] [2024-06-14 14:07:00,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621587058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:00,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:00,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:07:00,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423701502] [2024-06-14 14:07:00,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:00,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:07:00,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:00,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:07:00,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:07:00,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:00,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 267 transitions, 4040 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:00,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:00,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:00,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:02,173 INFO L124 PetriNetUnfolderBase]: 4730/8310 cut-off events. [2024-06-14 14:07:02,173 INFO L125 PetriNetUnfolderBase]: For 458183/458183 co-relation queries the response was YES. [2024-06-14 14:07:02,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51490 conditions, 8310 events. 4730/8310 cut-off events. For 458183/458183 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 62366 event pairs, 1520 based on Foata normal form. 42/8351 useless extension candidates. Maximal degree in co-relation 51391. Up to 3581 conditions per place. [2024-06-14 14:07:02,257 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 185 selfloop transitions, 136 changer transitions 0/328 dead transitions. [2024-06-14 14:07:02,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 328 transitions, 5156 flow [2024-06-14 14:07:02,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:07:02,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:07:02,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 285 transitions. [2024-06-14 14:07:02,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6168831168831169 [2024-06-14 14:07:02,258 INFO L175 Difference]: Start difference. First operand has 218 places, 267 transitions, 4040 flow. Second operand 11 states and 285 transitions. [2024-06-14 14:07:02,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 328 transitions, 5156 flow [2024-06-14 14:07:02,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 328 transitions, 4815 flow, removed 46 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:02,666 INFO L231 Difference]: Finished difference. Result has 219 places, 267 transitions, 3934 flow [2024-06-14 14:07:02,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3615, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3934, PETRI_PLACES=219, PETRI_TRANSITIONS=267} [2024-06-14 14:07:02,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-14 14:07:02,667 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 267 transitions, 3934 flow [2024-06-14 14:07:02,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:02,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:02,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:02,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 14:07:02,667 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)] === [2024-06-14 14:07:02,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:02,667 INFO L85 PathProgramCache]: Analyzing trace with hash 781300252, now seen corresponding path program 3 times [2024-06-14 14:07:02,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:02,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946057521] [2024-06-14 14:07:02,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:02,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:02,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:02,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:02,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946057521] [2024-06-14 14:07:02,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946057521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:02,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:02,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:02,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476537976] [2024-06-14 14:07:02,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:02,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:02,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:02,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:02,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:02,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:02,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 267 transitions, 3934 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:02,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:02,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:02,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:04,022 INFO L124 PetriNetUnfolderBase]: 4724/8295 cut-off events. [2024-06-14 14:07:04,022 INFO L125 PetriNetUnfolderBase]: For 404038/404038 co-relation queries the response was YES. [2024-06-14 14:07:04,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51232 conditions, 8295 events. 4724/8295 cut-off events. For 404038/404038 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 62621 event pairs, 1795 based on Foata normal form. 2/8296 useless extension candidates. Maximal degree in co-relation 51132. Up to 7441 conditions per place. [2024-06-14 14:07:04,086 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 71 changer transitions 0/296 dead transitions. [2024-06-14 14:07:04,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 296 transitions, 4800 flow [2024-06-14 14:07:04,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:04,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:04,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:07:04,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-14 14:07:04,087 INFO L175 Difference]: Start difference. First operand has 219 places, 267 transitions, 3934 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:07:04,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 296 transitions, 4800 flow [2024-06-14 14:07:04,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 296 transitions, 4366 flow, removed 50 selfloop flow, removed 10 redundant places. [2024-06-14 14:07:04,628 INFO L231 Difference]: Finished difference. Result has 217 places, 267 transitions, 3651 flow [2024-06-14 14:07:04,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3500, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3651, PETRI_PLACES=217, PETRI_TRANSITIONS=267} [2024-06-14 14:07:04,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-14 14:07:04,629 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 267 transitions, 3651 flow [2024-06-14 14:07:04,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:04,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:04,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:04,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 14:07:04,629 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)] === [2024-06-14 14:07:04,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:04,630 INFO L85 PathProgramCache]: Analyzing trace with hash -227114182, now seen corresponding path program 4 times [2024-06-14 14:07:04,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:04,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529312524] [2024-06-14 14:07:04,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:04,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:04,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:04,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:04,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529312524] [2024-06-14 14:07:04,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529312524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:04,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:04,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:04,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404925269] [2024-06-14 14:07:04,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:04,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:04,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:04,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:04,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:04,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:04,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 267 transitions, 3651 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:04,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:04,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:04,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:05,816 INFO L124 PetriNetUnfolderBase]: 4581/8048 cut-off events. [2024-06-14 14:07:05,816 INFO L125 PetriNetUnfolderBase]: For 362629/362629 co-relation queries the response was YES. [2024-06-14 14:07:05,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47521 conditions, 8048 events. 4581/8048 cut-off events. For 362629/362629 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 60333 event pairs, 1731 based on Foata normal form. 4/8051 useless extension candidates. Maximal degree in co-relation 47421. Up to 7223 conditions per place. [2024-06-14 14:07:05,896 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 214 selfloop transitions, 72 changer transitions 0/293 dead transitions. [2024-06-14 14:07:05,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 293 transitions, 4397 flow [2024-06-14 14:07:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:05,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:05,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-14 14:07:05,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-14 14:07:05,897 INFO L175 Difference]: Start difference. First operand has 217 places, 267 transitions, 3651 flow. Second operand 9 states and 214 transitions. [2024-06-14 14:07:05,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 293 transitions, 4397 flow [2024-06-14 14:07:06,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 293 transitions, 4286 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:06,380 INFO L231 Difference]: Finished difference. Result has 221 places, 267 transitions, 3693 flow [2024-06-14 14:07:06,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3693, PETRI_PLACES=221, PETRI_TRANSITIONS=267} [2024-06-14 14:07:06,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-14 14:07:06,380 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 267 transitions, 3693 flow [2024-06-14 14:07:06,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:06,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:06,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:06,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 14:07:06,381 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)] === [2024-06-14 14:07:06,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:06,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1395175872, now seen corresponding path program 5 times [2024-06-14 14:07:06,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:06,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404652298] [2024-06-14 14:07:06,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:06,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:06,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:06,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:06,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404652298] [2024-06-14 14:07:06,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404652298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:06,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:06,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:06,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062557251] [2024-06-14 14:07:06,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:06,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:06,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:06,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:06,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:06,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 267 transitions, 3693 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:06,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:06,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:06,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:07,571 INFO L124 PetriNetUnfolderBase]: 4490/7866 cut-off events. [2024-06-14 14:07:07,571 INFO L125 PetriNetUnfolderBase]: For 367476/367476 co-relation queries the response was YES. [2024-06-14 14:07:07,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46886 conditions, 7866 events. 4490/7866 cut-off events. For 367476/367476 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 58455 event pairs, 1698 based on Foata normal form. 2/7866 useless extension candidates. Maximal degree in co-relation 46785. Up to 7058 conditions per place. [2024-06-14 14:07:07,647 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 80 changer transitions 2/287 dead transitions. [2024-06-14 14:07:07,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 287 transitions, 4525 flow [2024-06-14 14:07:07,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:07,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:07,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 14:07:07,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-14 14:07:07,648 INFO L175 Difference]: Start difference. First operand has 221 places, 267 transitions, 3693 flow. Second operand 8 states and 193 transitions. [2024-06-14 14:07:07,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 287 transitions, 4525 flow [2024-06-14 14:07:08,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 287 transitions, 4347 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:08,077 INFO L231 Difference]: Finished difference. Result has 220 places, 265 transitions, 3649 flow [2024-06-14 14:07:08,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3515, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3649, PETRI_PLACES=220, PETRI_TRANSITIONS=265} [2024-06-14 14:07:08,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-14 14:07:08,078 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 265 transitions, 3649 flow [2024-06-14 14:07:08,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:08,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:08,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:08,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 14:07:08,079 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)] === [2024-06-14 14:07:08,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:08,079 INFO L85 PathProgramCache]: Analyzing trace with hash 981017752, now seen corresponding path program 6 times [2024-06-14 14:07:08,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:08,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111206020] [2024-06-14 14:07:08,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:08,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:08,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:08,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111206020] [2024-06-14 14:07:08,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111206020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:08,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:08,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:08,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987774471] [2024-06-14 14:07:08,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:08,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:08,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:08,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:08,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:08,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:08,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 265 transitions, 3649 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:08,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:08,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:08,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:09,192 INFO L124 PetriNetUnfolderBase]: 4357/7620 cut-off events. [2024-06-14 14:07:09,192 INFO L125 PetriNetUnfolderBase]: For 374809/374809 co-relation queries the response was YES. [2024-06-14 14:07:09,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45858 conditions, 7620 events. 4357/7620 cut-off events. For 374809/374809 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 56135 event pairs, 1643 based on Foata normal form. 2/7620 useless extension candidates. Maximal degree in co-relation 45757. Up to 6831 conditions per place. [2024-06-14 14:07:09,266 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 199 selfloop transitions, 77 changer transitions 2/285 dead transitions. [2024-06-14 14:07:09,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 285 transitions, 4367 flow [2024-06-14 14:07:09,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:09,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:09,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-14 14:07:09,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-14 14:07:09,267 INFO L175 Difference]: Start difference. First operand has 220 places, 265 transitions, 3649 flow. Second operand 9 states and 209 transitions. [2024-06-14 14:07:09,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 285 transitions, 4367 flow [2024-06-14 14:07:09,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 285 transitions, 4101 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 14:07:09,840 INFO L231 Difference]: Finished difference. Result has 220 places, 263 transitions, 3518 flow [2024-06-14 14:07:09,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3518, PETRI_PLACES=220, PETRI_TRANSITIONS=263} [2024-06-14 14:07:09,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-14 14:07:09,840 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 263 transitions, 3518 flow [2024-06-14 14:07:09,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:09,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:09,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:09,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 14:07:09,841 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)] === [2024-06-14 14:07:09,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:09,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1424635089, now seen corresponding path program 1 times [2024-06-14 14:07:09,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:09,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993495708] [2024-06-14 14:07:09,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:09,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:10,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:10,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993495708] [2024-06-14 14:07:10,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993495708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:10,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:10,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:10,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619205837] [2024-06-14 14:07:10,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:10,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:10,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:10,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:10,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:10,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:10,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 263 transitions, 3518 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:10,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:10,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:10,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:11,002 INFO L124 PetriNetUnfolderBase]: 4373/7663 cut-off events. [2024-06-14 14:07:11,002 INFO L125 PetriNetUnfolderBase]: For 391003/391003 co-relation queries the response was YES. [2024-06-14 14:07:11,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46514 conditions, 7663 events. 4373/7663 cut-off events. For 391003/391003 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 56548 event pairs, 1631 based on Foata normal form. 2/7664 useless extension candidates. Maximal degree in co-relation 46412. Up to 6943 conditions per place. [2024-06-14 14:07:11,077 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 247 selfloop transitions, 53 changer transitions 4/311 dead transitions. [2024-06-14 14:07:11,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 311 transitions, 4702 flow [2024-06-14 14:07:11,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:11,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-14 14:07:11,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:07:11,078 INFO L175 Difference]: Start difference. First operand has 220 places, 263 transitions, 3518 flow. Second operand 8 states and 192 transitions. [2024-06-14 14:07:11,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 311 transitions, 4702 flow [2024-06-14 14:07:11,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 311 transitions, 4418 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-14 14:07:11,667 INFO L231 Difference]: Finished difference. Result has 220 places, 281 transitions, 3742 flow [2024-06-14 14:07:11,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3293, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3742, PETRI_PLACES=220, PETRI_TRANSITIONS=281} [2024-06-14 14:07:11,667 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-14 14:07:11,667 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 281 transitions, 3742 flow [2024-06-14 14:07:11,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:11,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:11,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:11,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 14:07:11,668 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)] === [2024-06-14 14:07:11,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:11,668 INFO L85 PathProgramCache]: Analyzing trace with hash -215077409, now seen corresponding path program 2 times [2024-06-14 14:07:11,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:11,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640543510] [2024-06-14 14:07:11,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:11,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:11,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:11,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640543510] [2024-06-14 14:07:11,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640543510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:11,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:11,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:11,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184332962] [2024-06-14 14:07:11,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:11,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:11,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:11,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:11,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:11,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 281 transitions, 3742 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:11,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:11,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:11,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:13,030 INFO L124 PetriNetUnfolderBase]: 4371/7658 cut-off events. [2024-06-14 14:07:13,031 INFO L125 PetriNetUnfolderBase]: For 402529/402529 co-relation queries the response was YES. [2024-06-14 14:07:13,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46594 conditions, 7658 events. 4371/7658 cut-off events. For 402529/402529 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 56532 event pairs, 1631 based on Foata normal form. 3/7660 useless extension candidates. Maximal degree in co-relation 46489. Up to 6830 conditions per place. [2024-06-14 14:07:13,117 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 213 selfloop transitions, 92 changer transitions 2/314 dead transitions. [2024-06-14 14:07:13,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 314 transitions, 4772 flow [2024-06-14 14:07:13,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:13,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:13,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 14:07:13,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-14 14:07:13,119 INFO L175 Difference]: Start difference. First operand has 220 places, 281 transitions, 3742 flow. Second operand 8 states and 194 transitions. [2024-06-14 14:07:13,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 314 transitions, 4772 flow [2024-06-14 14:07:13,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 314 transitions, 4747 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:13,798 INFO L231 Difference]: Finished difference. Result has 225 places, 286 transitions, 3990 flow [2024-06-14 14:07:13,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3717, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3990, PETRI_PLACES=225, PETRI_TRANSITIONS=286} [2024-06-14 14:07:13,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-14 14:07:13,798 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 286 transitions, 3990 flow [2024-06-14 14:07:13,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:13,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:13,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:13,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 14:07:13,799 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)] === [2024-06-14 14:07:13,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:13,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1676247133, now seen corresponding path program 3 times [2024-06-14 14:07:13,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:13,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642511102] [2024-06-14 14:07:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:13,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:13,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:13,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:13,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642511102] [2024-06-14 14:07:13,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642511102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:13,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:13,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:13,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981697430] [2024-06-14 14:07:13,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:13,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:13,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:13,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:13,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:14,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:14,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 286 transitions, 3990 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:14,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:14,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:14,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:15,233 INFO L124 PetriNetUnfolderBase]: 4297/7513 cut-off events. [2024-06-14 14:07:15,233 INFO L125 PetriNetUnfolderBase]: For 410187/410187 co-relation queries the response was YES. [2024-06-14 14:07:15,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46357 conditions, 7513 events. 4297/7513 cut-off events. For 410187/410187 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 55158 event pairs, 1599 based on Foata normal form. 2/7513 useless extension candidates. Maximal degree in co-relation 46250. Up to 6698 conditions per place. [2024-06-14 14:07:15,319 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 207 selfloop transitions, 85 changer transitions 5/304 dead transitions. [2024-06-14 14:07:15,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 304 transitions, 4748 flow [2024-06-14 14:07:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:07:15,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:07:15,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 14:07:15,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:07:15,321 INFO L175 Difference]: Start difference. First operand has 225 places, 286 transitions, 3990 flow. Second operand 7 states and 168 transitions. [2024-06-14 14:07:15,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 304 transitions, 4748 flow [2024-06-14 14:07:15,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 304 transitions, 4657 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:15,907 INFO L231 Difference]: Finished difference. Result has 228 places, 281 transitions, 3986 flow [2024-06-14 14:07:15,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3986, PETRI_PLACES=228, PETRI_TRANSITIONS=281} [2024-06-14 14:07:15,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-14 14:07:15,908 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 281 transitions, 3986 flow [2024-06-14 14:07:15,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:15,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:15,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:15,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 14:07:15,909 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)] === [2024-06-14 14:07:15,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:15,909 INFO L85 PathProgramCache]: Analyzing trace with hash -430718847, now seen corresponding path program 1 times [2024-06-14 14:07:15,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:15,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388110426] [2024-06-14 14:07:15,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:15,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:15,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:16,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:16,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:16,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388110426] [2024-06-14 14:07:16,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388110426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:16,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:16,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:16,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391218012] [2024-06-14 14:07:16,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:16,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:16,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:16,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:16,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:16,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:07:16,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 281 transitions, 3986 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 14:07:16,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:16,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:07:16,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:17,102 INFO L124 PetriNetUnfolderBase]: 3949/6999 cut-off events. [2024-06-14 14:07:17,102 INFO L125 PetriNetUnfolderBase]: For 439724/439724 co-relation queries the response was YES. [2024-06-14 14:07:17,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44190 conditions, 6999 events. 3949/6999 cut-off events. For 439724/439724 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 51481 event pairs, 1416 based on Foata normal form. 17/6965 useless extension candidates. Maximal degree in co-relation 44082. Up to 6138 conditions per place. [2024-06-14 14:07:17,175 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 236 selfloop transitions, 31 changer transitions 0/306 dead transitions. [2024-06-14 14:07:17,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 306 transitions, 4643 flow [2024-06-14 14:07:17,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 14:07:17,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 14:07:17,176 INFO L175 Difference]: Start difference. First operand has 228 places, 281 transitions, 3986 flow. Second operand 8 states and 186 transitions. [2024-06-14 14:07:17,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 306 transitions, 4643 flow [2024-06-14 14:07:17,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 306 transitions, 4247 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-14 14:07:17,906 INFO L231 Difference]: Finished difference. Result has 226 places, 284 transitions, 3721 flow [2024-06-14 14:07:17,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3590, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3721, PETRI_PLACES=226, PETRI_TRANSITIONS=284} [2024-06-14 14:07:17,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-14 14:07:17,906 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 284 transitions, 3721 flow [2024-06-14 14:07:17,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 14:07:17,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:17,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:17,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 14:07:17,906 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)] === [2024-06-14 14:07:17,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash 531995057, now seen corresponding path program 2 times [2024-06-14 14:07:17,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:17,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373762037] [2024-06-14 14:07:17,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:17,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:17,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:18,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:18,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373762037] [2024-06-14 14:07:18,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373762037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:18,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:18,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:18,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611083289] [2024-06-14 14:07:18,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:18,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:18,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:18,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:18,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:18,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-14 14:07:18,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 284 transitions, 3721 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 14:07:18,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:18,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-14 14:07:18,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:19,083 INFO L124 PetriNetUnfolderBase]: 3997/7085 cut-off events. [2024-06-14 14:07:19,083 INFO L125 PetriNetUnfolderBase]: For 439094/439094 co-relation queries the response was YES. [2024-06-14 14:07:19,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44746 conditions, 7085 events. 3997/7085 cut-off events. For 439094/439094 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 52375 event pairs, 1392 based on Foata normal form. 8/7045 useless extension candidates. Maximal degree in co-relation 44638. Up to 6096 conditions per place. [2024-06-14 14:07:19,155 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 243 selfloop transitions, 32 changer transitions 0/314 dead transitions. [2024-06-14 14:07:19,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 314 transitions, 4560 flow [2024-06-14 14:07:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:19,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 14:07:19,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 14:07:19,156 INFO L175 Difference]: Start difference. First operand has 226 places, 284 transitions, 3721 flow. Second operand 8 states and 188 transitions. [2024-06-14 14:07:19,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 314 transitions, 4560 flow [2024-06-14 14:07:19,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 314 transitions, 4480 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:19,722 INFO L231 Difference]: Finished difference. Result has 229 places, 287 transitions, 3780 flow [2024-06-14 14:07:19,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3641, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3780, PETRI_PLACES=229, PETRI_TRANSITIONS=287} [2024-06-14 14:07:19,722 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-14 14:07:19,722 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 287 transitions, 3780 flow [2024-06-14 14:07:19,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 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) [2024-06-14 14:07:19,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:19,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:19,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 14:07:19,723 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)] === [2024-06-14 14:07:19,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:19,723 INFO L85 PathProgramCache]: Analyzing trace with hash -848471015, now seen corresponding path program 1 times [2024-06-14 14:07:19,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:19,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881703838] [2024-06-14 14:07:19,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:19,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:19,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:19,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:19,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881703838] [2024-06-14 14:07:19,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881703838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:19,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:19,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:19,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937899177] [2024-06-14 14:07:19,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:19,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:19,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:19,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:19,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:19,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:19,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 287 transitions, 3780 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:19,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:19,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:19,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:20,872 INFO L124 PetriNetUnfolderBase]: 4187/7331 cut-off events. [2024-06-14 14:07:20,872 INFO L125 PetriNetUnfolderBase]: For 440397/440397 co-relation queries the response was YES. [2024-06-14 14:07:20,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46143 conditions, 7331 events. 4187/7331 cut-off events. For 440397/440397 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53463 event pairs, 1421 based on Foata normal form. 2/7332 useless extension candidates. Maximal degree in co-relation 46033. Up to 6692 conditions per place. [2024-06-14 14:07:20,947 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 281 selfloop transitions, 22 changer transitions 0/310 dead transitions. [2024-06-14 14:07:20,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 310 transitions, 4674 flow [2024-06-14 14:07:20,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 14:07:20,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 14:07:20,948 INFO L175 Difference]: Start difference. First operand has 229 places, 287 transitions, 3780 flow. Second operand 6 states and 142 transitions. [2024-06-14 14:07:20,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 310 transitions, 4674 flow [2024-06-14 14:07:21,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 310 transitions, 4629 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 14:07:21,625 INFO L231 Difference]: Finished difference. Result has 231 places, 291 transitions, 3904 flow [2024-06-14 14:07:21,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3735, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3904, PETRI_PLACES=231, PETRI_TRANSITIONS=291} [2024-06-14 14:07:21,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-14 14:07:21,626 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 291 transitions, 3904 flow [2024-06-14 14:07:21,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:21,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:21,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:21,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 14:07:21,627 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)] === [2024-06-14 14:07:21,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:21,627 INFO L85 PathProgramCache]: Analyzing trace with hash -848410565, now seen corresponding path program 2 times [2024-06-14 14:07:21,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:21,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730505371] [2024-06-14 14:07:21,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:21,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:21,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:21,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730505371] [2024-06-14 14:07:21,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730505371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:21,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:21,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:07:21,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117600299] [2024-06-14 14:07:21,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:21,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:07:21,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:21,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:07:21,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:07:21,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:21,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 291 transitions, 3904 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:21,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:21,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:21,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:22,830 INFO L124 PetriNetUnfolderBase]: 4182/7324 cut-off events. [2024-06-14 14:07:22,830 INFO L125 PetriNetUnfolderBase]: For 449107/449107 co-relation queries the response was YES. [2024-06-14 14:07:22,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46177 conditions, 7324 events. 4182/7324 cut-off events. For 449107/449107 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 53425 event pairs, 1504 based on Foata normal form. 2/7325 useless extension candidates. Maximal degree in co-relation 46065. Up to 6720 conditions per place. [2024-06-14 14:07:22,901 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 278 selfloop transitions, 20 changer transitions 0/305 dead transitions. [2024-06-14 14:07:22,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 305 transitions, 4534 flow [2024-06-14 14:07:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:07:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:07:22,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 14:07:22,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:07:22,902 INFO L175 Difference]: Start difference. First operand has 231 places, 291 transitions, 3904 flow. Second operand 6 states and 138 transitions. [2024-06-14 14:07:22,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 305 transitions, 4534 flow [2024-06-14 14:07:23,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 305 transitions, 4415 flow, removed 51 selfloop flow, removed 2 redundant places. [2024-06-14 14:07:23,455 INFO L231 Difference]: Finished difference. Result has 235 places, 291 transitions, 3830 flow [2024-06-14 14:07:23,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3785, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3830, PETRI_PLACES=235, PETRI_TRANSITIONS=291} [2024-06-14 14:07:23,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-14 14:07:23,455 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 291 transitions, 3830 flow [2024-06-14 14:07:23,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:23,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:23,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:23,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 14:07:23,456 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)] === [2024-06-14 14:07:23,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:23,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1922542821, now seen corresponding path program 1 times [2024-06-14 14:07:23,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:23,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323934583] [2024-06-14 14:07:23,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:23,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:23,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:23,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323934583] [2024-06-14 14:07:23,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323934583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:23,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:23,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:23,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257858362] [2024-06-14 14:07:23,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:23,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:23,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:23,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:23,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 291 transitions, 3830 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:23,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:23,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:23,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:24,727 INFO L124 PetriNetUnfolderBase]: 4254/7440 cut-off events. [2024-06-14 14:07:24,728 INFO L125 PetriNetUnfolderBase]: For 502035/502035 co-relation queries the response was YES. [2024-06-14 14:07:24,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46904 conditions, 7440 events. 4254/7440 cut-off events. For 502035/502035 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54284 event pairs, 1512 based on Foata normal form. 20/7459 useless extension candidates. Maximal degree in co-relation 46790. Up to 6538 conditions per place. [2024-06-14 14:07:24,806 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 94 changer transitions 0/325 dead transitions. [2024-06-14 14:07:24,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 325 transitions, 4744 flow [2024-06-14 14:07:24,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-14 14:07:24,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 14:07:24,808 INFO L175 Difference]: Start difference. First operand has 235 places, 291 transitions, 3830 flow. Second operand 10 states and 235 transitions. [2024-06-14 14:07:24,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 325 transitions, 4744 flow [2024-06-14 14:07:25,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 325 transitions, 4694 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:25,576 INFO L231 Difference]: Finished difference. Result has 240 places, 294 transitions, 4045 flow [2024-06-14 14:07:25,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3780, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4045, PETRI_PLACES=240, PETRI_TRANSITIONS=294} [2024-06-14 14:07:25,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-14 14:07:25,577 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 294 transitions, 4045 flow [2024-06-14 14:07:25,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:25,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:25,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:25,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 14:07:25,577 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)] === [2024-06-14 14:07:25,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:25,577 INFO L85 PathProgramCache]: Analyzing trace with hash -424045663, now seen corresponding path program 2 times [2024-06-14 14:07:25,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:25,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973903971] [2024-06-14 14:07:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:25,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:25,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:25,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:25,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973903971] [2024-06-14 14:07:25,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973903971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:25,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:25,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:25,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049754363] [2024-06-14 14:07:25,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:25,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:25,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:25,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:25,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:25,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:25,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 294 transitions, 4045 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:25,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:25,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:25,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:26,868 INFO L124 PetriNetUnfolderBase]: 4270/7467 cut-off events. [2024-06-14 14:07:26,868 INFO L125 PetriNetUnfolderBase]: For 483844/483844 co-relation queries the response was YES. [2024-06-14 14:07:26,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47801 conditions, 7467 events. 4270/7467 cut-off events. For 483844/483844 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54571 event pairs, 1524 based on Foata normal form. 4/7469 useless extension candidates. Maximal degree in co-relation 47686. Up to 6632 conditions per place. [2024-06-14 14:07:26,945 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 106 changer transitions 0/318 dead transitions. [2024-06-14 14:07:26,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 318 transitions, 4917 flow [2024-06-14 14:07:26,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:26,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:26,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-14 14:07:26,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-14 14:07:26,946 INFO L175 Difference]: Start difference. First operand has 240 places, 294 transitions, 4045 flow. Second operand 9 states and 209 transitions. [2024-06-14 14:07:26,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 318 transitions, 4917 flow [2024-06-14 14:07:27,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 318 transitions, 4684 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:27,860 INFO L231 Difference]: Finished difference. Result has 241 places, 297 transitions, 4104 flow [2024-06-14 14:07:27,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3812, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4104, PETRI_PLACES=241, PETRI_TRANSITIONS=297} [2024-06-14 14:07:27,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-14 14:07:27,860 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 297 transitions, 4104 flow [2024-06-14 14:07:27,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:27,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:27,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:27,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 14:07:27,861 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)] === [2024-06-14 14:07:27,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:27,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1927684805, now seen corresponding path program 3 times [2024-06-14 14:07:27,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:27,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303456803] [2024-06-14 14:07:27,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:27,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:28,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:28,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:28,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303456803] [2024-06-14 14:07:28,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303456803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:28,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:28,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:28,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188894841] [2024-06-14 14:07:28,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:28,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:28,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:28,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:28,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:28,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:28,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 297 transitions, 4104 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:28,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:28,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:28,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:29,174 INFO L124 PetriNetUnfolderBase]: 4286/7491 cut-off events. [2024-06-14 14:07:29,174 INFO L125 PetriNetUnfolderBase]: For 498923/498923 co-relation queries the response was YES. [2024-06-14 14:07:29,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48058 conditions, 7491 events. 4286/7491 cut-off events. For 498923/498923 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54683 event pairs, 1528 based on Foata normal form. 4/7493 useless extension candidates. Maximal degree in co-relation 47942. Up to 6654 conditions per place. [2024-06-14 14:07:29,254 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 214 selfloop transitions, 101 changer transitions 0/322 dead transitions. [2024-06-14 14:07:29,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 322 transitions, 4994 flow [2024-06-14 14:07:29,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:29,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-14 14:07:29,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-14 14:07:29,255 INFO L175 Difference]: Start difference. First operand has 241 places, 297 transitions, 4104 flow. Second operand 10 states and 227 transitions. [2024-06-14 14:07:29,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 322 transitions, 4994 flow [2024-06-14 14:07:30,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 322 transitions, 4724 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:30,035 INFO L231 Difference]: Finished difference. Result has 244 places, 300 transitions, 4123 flow [2024-06-14 14:07:30,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3834, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4123, PETRI_PLACES=244, PETRI_TRANSITIONS=300} [2024-06-14 14:07:30,036 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-14 14:07:30,036 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 300 transitions, 4123 flow [2024-06-14 14:07:30,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:30,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:30,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:07:30,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 14:07:30,036 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)] === [2024-06-14 14:07:30,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:30,037 INFO L85 PathProgramCache]: Analyzing trace with hash 583713731, now seen corresponding path program 4 times [2024-06-14 14:07:30,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:30,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675772370] [2024-06-14 14:07:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:30,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:30,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:30,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675772370] [2024-06-14 14:07:30,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675772370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:30,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:30,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:30,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020697918] [2024-06-14 14:07:30,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:30,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:30,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:30,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:30,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:30,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:30,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 300 transitions, 4123 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:30,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:30,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:30,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:31,313 INFO L124 PetriNetUnfolderBase]: 4289/7496 cut-off events. [2024-06-14 14:07:31,313 INFO L125 PetriNetUnfolderBase]: For 509262/509262 co-relation queries the response was YES. [2024-06-14 14:07:31,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48113 conditions, 7496 events. 4289/7496 cut-off events. For 509262/509262 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54857 event pairs, 1509 based on Foata normal form. 4/7498 useless extension candidates. Maximal degree in co-relation 47996. Up to 6537 conditions per place. [2024-06-14 14:07:31,394 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 206 selfloop transitions, 117 changer transitions 0/330 dead transitions. [2024-06-14 14:07:31,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 330 transitions, 5084 flow [2024-06-14 14:07:31,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:31,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 14:07:31,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-14 14:07:31,395 INFO L175 Difference]: Start difference. First operand has 244 places, 300 transitions, 4123 flow. Second operand 9 states and 213 transitions. [2024-06-14 14:07:31,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 330 transitions, 5084 flow [2024-06-14 14:07:32,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 330 transitions, 4819 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:32,171 INFO L231 Difference]: Finished difference. Result has 246 places, 305 transitions, 4235 flow [2024-06-14 14:07:32,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3858, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4235, PETRI_PLACES=246, PETRI_TRANSITIONS=305} [2024-06-14 14:07:32,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-14 14:07:32,171 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 305 transitions, 4235 flow [2024-06-14 14:07:32,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:32,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:32,171 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] [2024-06-14 14:07:32,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 14:07:32,172 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)] === [2024-06-14 14:07:32,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:32,172 INFO L85 PathProgramCache]: Analyzing trace with hash -291010471, now seen corresponding path program 1 times [2024-06-14 14:07:32,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:32,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044968646] [2024-06-14 14:07:32,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:32,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:32,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:32,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044968646] [2024-06-14 14:07:32,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044968646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:32,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:32,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:32,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158654091] [2024-06-14 14:07:32,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:32,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:32,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:32,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:32,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:32,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:32,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 305 transitions, 4235 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:32,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:32,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:32,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:33,455 INFO L124 PetriNetUnfolderBase]: 4291/7495 cut-off events. [2024-06-14 14:07:33,455 INFO L125 PetriNetUnfolderBase]: For 515253/515253 co-relation queries the response was YES. [2024-06-14 14:07:33,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48409 conditions, 7495 events. 4291/7495 cut-off events. For 515253/515253 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54697 event pairs, 1509 based on Foata normal form. 2/7496 useless extension candidates. Maximal degree in co-relation 48290. Up to 6817 conditions per place. [2024-06-14 14:07:33,539 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 44 changer transitions 0/336 dead transitions. [2024-06-14 14:07:33,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 336 transitions, 5150 flow [2024-06-14 14:07:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:33,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 14:07:33,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-14 14:07:33,540 INFO L175 Difference]: Start difference. First operand has 246 places, 305 transitions, 4235 flow. Second operand 8 states and 194 transitions. [2024-06-14 14:07:33,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 336 transitions, 5150 flow [2024-06-14 14:07:34,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 336 transitions, 4920 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:34,335 INFO L231 Difference]: Finished difference. Result has 249 places, 308 transitions, 4152 flow [2024-06-14 14:07:34,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4152, PETRI_PLACES=249, PETRI_TRANSITIONS=308} [2024-06-14 14:07:34,336 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-14 14:07:34,336 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 308 transitions, 4152 flow [2024-06-14 14:07:34,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:34,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:34,336 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] [2024-06-14 14:07:34,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 14:07:34,336 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)] === [2024-06-14 14:07:34,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:34,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1149284775, now seen corresponding path program 2 times [2024-06-14 14:07:34,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:34,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841921100] [2024-06-14 14:07:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:34,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:34,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:34,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:34,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841921100] [2024-06-14 14:07:34,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841921100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:34,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:34,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:34,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804610821] [2024-06-14 14:07:34,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:34,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:34,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:34,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:34,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:34,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:34,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 308 transitions, 4152 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:34,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:34,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:34,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:35,650 INFO L124 PetriNetUnfolderBase]: 4301/7511 cut-off events. [2024-06-14 14:07:35,650 INFO L125 PetriNetUnfolderBase]: For 524290/524290 co-relation queries the response was YES. [2024-06-14 14:07:35,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48546 conditions, 7511 events. 4301/7511 cut-off events. For 524290/524290 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54814 event pairs, 1515 based on Foata normal form. 1/7511 useless extension candidates. Maximal degree in co-relation 48425. Up to 6823 conditions per place. [2024-06-14 14:07:35,732 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 51 changer transitions 0/344 dead transitions. [2024-06-14 14:07:35,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 344 transitions, 5137 flow [2024-06-14 14:07:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:07:35,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:07:35,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-14 14:07:35,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:07:35,733 INFO L175 Difference]: Start difference. First operand has 249 places, 308 transitions, 4152 flow. Second operand 10 states and 230 transitions. [2024-06-14 14:07:35,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 344 transitions, 5137 flow [2024-06-14 14:07:36,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 344 transitions, 5048 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:36,664 INFO L231 Difference]: Finished difference. Result has 254 places, 314 transitions, 4270 flow [2024-06-14 14:07:36,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4270, PETRI_PLACES=254, PETRI_TRANSITIONS=314} [2024-06-14 14:07:36,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-14 14:07:36,664 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 314 transitions, 4270 flow [2024-06-14 14:07:36,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:36,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:36,665 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] [2024-06-14 14:07:36,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 14:07:36,665 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)] === [2024-06-14 14:07:36,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:36,665 INFO L85 PathProgramCache]: Analyzing trace with hash -895802785, now seen corresponding path program 3 times [2024-06-14 14:07:36,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:36,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395389896] [2024-06-14 14:07:36,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:36,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:36,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:36,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:36,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395389896] [2024-06-14 14:07:36,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395389896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:36,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:36,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:36,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36687057] [2024-06-14 14:07:36,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:36,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:36,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:36,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:36,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:36,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:36,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 314 transitions, 4270 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:36,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:36,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:36,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:38,018 INFO L124 PetriNetUnfolderBase]: 4311/7529 cut-off events. [2024-06-14 14:07:38,018 INFO L125 PetriNetUnfolderBase]: For 541542/541542 co-relation queries the response was YES. [2024-06-14 14:07:38,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48861 conditions, 7529 events. 4311/7529 cut-off events. For 541542/541542 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 54982 event pairs, 1505 based on Foata normal form. 2/7529 useless extension candidates. Maximal degree in co-relation 48739. Up to 6389 conditions per place. [2024-06-14 14:07:38,098 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 207 selfloop transitions, 132 changer transitions 0/346 dead transitions. [2024-06-14 14:07:38,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 346 transitions, 5638 flow [2024-06-14 14:07:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:38,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:38,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 14:07:38,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-14 14:07:38,099 INFO L175 Difference]: Start difference. First operand has 254 places, 314 transitions, 4270 flow. Second operand 8 states and 203 transitions. [2024-06-14 14:07:38,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 346 transitions, 5638 flow [2024-06-14 14:07:39,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 346 transitions, 5524 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 14:07:39,039 INFO L231 Difference]: Finished difference. Result has 255 places, 318 transitions, 4485 flow [2024-06-14 14:07:39,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4485, PETRI_PLACES=255, PETRI_TRANSITIONS=318} [2024-06-14 14:07:39,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-14 14:07:39,039 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 318 transitions, 4485 flow [2024-06-14 14:07:39,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:39,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:39,040 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] [2024-06-14 14:07:39,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 14:07:39,040 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)] === [2024-06-14 14:07:39,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:39,040 INFO L85 PathProgramCache]: Analyzing trace with hash -155865591, now seen corresponding path program 4 times [2024-06-14 14:07:39,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:39,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604907657] [2024-06-14 14:07:39,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:39,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:39,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:39,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:39,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:39,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604907657] [2024-06-14 14:07:39,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604907657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:39,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:39,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:39,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184911967] [2024-06-14 14:07:39,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:39,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:39,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:39,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:39,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:39,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:39,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 318 transitions, 4485 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:39,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:39,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:39,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:40,332 INFO L124 PetriNetUnfolderBase]: 4313/7534 cut-off events. [2024-06-14 14:07:40,332 INFO L125 PetriNetUnfolderBase]: For 555115/555115 co-relation queries the response was YES. [2024-06-14 14:07:40,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49402 conditions, 7534 events. 4313/7534 cut-off events. For 555115/555115 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55027 event pairs, 1505 based on Foata normal form. 2/7534 useless extension candidates. Maximal degree in co-relation 49279. Up to 6389 conditions per place. [2024-06-14 14:07:40,416 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 201 selfloop transitions, 137 changer transitions 0/345 dead transitions. [2024-06-14 14:07:40,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 345 transitions, 5699 flow [2024-06-14 14:07:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:07:40,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-14 14:07:40,417 INFO L175 Difference]: Start difference. First operand has 255 places, 318 transitions, 4485 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:07:40,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 345 transitions, 5699 flow [2024-06-14 14:07:41,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 345 transitions, 5447 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:41,274 INFO L231 Difference]: Finished difference. Result has 258 places, 321 transitions, 4564 flow [2024-06-14 14:07:41,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4564, PETRI_PLACES=258, PETRI_TRANSITIONS=321} [2024-06-14 14:07:41,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-14 14:07:41,274 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 321 transitions, 4564 flow [2024-06-14 14:07:41,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:41,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:41,275 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] [2024-06-14 14:07:41,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 14:07:41,275 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)] === [2024-06-14 14:07:41,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:41,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1076033547, now seen corresponding path program 5 times [2024-06-14 14:07:41,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:41,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853630554] [2024-06-14 14:07:41,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:41,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:41,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:41,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853630554] [2024-06-14 14:07:41,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853630554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:41,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:41,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:41,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782341159] [2024-06-14 14:07:41,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:41,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:41,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:41,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:41,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:41,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:41,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 321 transitions, 4564 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:41,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:41,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:41,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:42,590 INFO L124 PetriNetUnfolderBase]: 4342/7580 cut-off events. [2024-06-14 14:07:42,590 INFO L125 PetriNetUnfolderBase]: For 575457/575457 co-relation queries the response was YES. [2024-06-14 14:07:42,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50187 conditions, 7580 events. 4342/7580 cut-off events. For 575457/575457 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55267 event pairs, 1517 based on Foata normal form. 1/7579 useless extension candidates. Maximal degree in co-relation 50063. Up to 6403 conditions per place. [2024-06-14 14:07:42,810 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 191 selfloop transitions, 155 changer transitions 0/353 dead transitions. [2024-06-14 14:07:42,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 353 transitions, 6064 flow [2024-06-14 14:07:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 14:07:42,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-14 14:07:42,811 INFO L175 Difference]: Start difference. First operand has 258 places, 321 transitions, 4564 flow. Second operand 8 states and 193 transitions. [2024-06-14 14:07:42,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 353 transitions, 6064 flow [2024-06-14 14:07:43,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 353 transitions, 5813 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 14:07:43,695 INFO L231 Difference]: Finished difference. Result has 263 places, 331 transitions, 4865 flow [2024-06-14 14:07:43,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4323, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4865, PETRI_PLACES=263, PETRI_TRANSITIONS=331} [2024-06-14 14:07:43,696 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-14 14:07:43,696 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 331 transitions, 4865 flow [2024-06-14 14:07:43,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:43,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:43,696 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] [2024-06-14 14:07:43,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 14:07:43,696 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)] === [2024-06-14 14:07:43,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:43,697 INFO L85 PathProgramCache]: Analyzing trace with hash -90607561, now seen corresponding path program 6 times [2024-06-14 14:07:43,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:43,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563003435] [2024-06-14 14:07:43,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:43,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:43,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:43,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563003435] [2024-06-14 14:07:43,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563003435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:43,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:43,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:43,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418574138] [2024-06-14 14:07:43,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:43,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:43,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:43,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:43,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:43,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:43,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 331 transitions, 4865 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:43,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:43,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:43,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:45,020 INFO L124 PetriNetUnfolderBase]: 4339/7576 cut-off events. [2024-06-14 14:07:45,020 INFO L125 PetriNetUnfolderBase]: For 588716/588716 co-relation queries the response was YES. [2024-06-14 14:07:45,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50434 conditions, 7576 events. 4339/7576 cut-off events. For 588716/588716 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55362 event pairs, 1517 based on Foata normal form. 1/7576 useless extension candidates. Maximal degree in co-relation 50307. Up to 6922 conditions per place. [2024-06-14 14:07:45,106 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 36 changer transitions 0/349 dead transitions. [2024-06-14 14:07:45,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 349 transitions, 5593 flow [2024-06-14 14:07:45,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 14:07:45,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:07:45,107 INFO L175 Difference]: Start difference. First operand has 263 places, 331 transitions, 4865 flow. Second operand 8 states and 180 transitions. [2024-06-14 14:07:45,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 349 transitions, 5593 flow [2024-06-14 14:07:46,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 349 transitions, 5397 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-14 14:07:46,065 INFO L231 Difference]: Finished difference. Result has 268 places, 331 transitions, 4747 flow [2024-06-14 14:07:46,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4669, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4747, PETRI_PLACES=268, PETRI_TRANSITIONS=331} [2024-06-14 14:07:46,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-14 14:07:46,065 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 331 transitions, 4747 flow [2024-06-14 14:07:46,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:46,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:46,066 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] [2024-06-14 14:07:46,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 14:07:46,066 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)] === [2024-06-14 14:07:46,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:46,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1576221545, now seen corresponding path program 1 times [2024-06-14 14:07:46,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:46,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301252145] [2024-06-14 14:07:46,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:46,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:46,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:46,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301252145] [2024-06-14 14:07:46,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301252145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:46,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:46,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:46,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256083345] [2024-06-14 14:07:46,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:46,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:46,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:46,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:46,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:46,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:46,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 331 transitions, 4747 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:46,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:46,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:46,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:47,411 INFO L124 PetriNetUnfolderBase]: 4334/7569 cut-off events. [2024-06-14 14:07:47,411 INFO L125 PetriNetUnfolderBase]: For 600685/600685 co-relation queries the response was YES. [2024-06-14 14:07:47,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50019 conditions, 7569 events. 4334/7569 cut-off events. For 600685/600685 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55314 event pairs, 1377 based on Foata normal form. 2/7570 useless extension candidates. Maximal degree in co-relation 49891. Up to 6831 conditions per place. [2024-06-14 14:07:47,495 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 317 selfloop transitions, 41 changer transitions 0/365 dead transitions. [2024-06-14 14:07:47,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 365 transitions, 5734 flow [2024-06-14 14:07:47,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 14:07:47,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-14 14:07:47,496 INFO L175 Difference]: Start difference. First operand has 268 places, 331 transitions, 4747 flow. Second operand 8 states and 194 transitions. [2024-06-14 14:07:47,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 365 transitions, 5734 flow [2024-06-14 14:07:48,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 365 transitions, 5654 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:48,544 INFO L231 Difference]: Finished difference. Result has 270 places, 332 transitions, 4779 flow [2024-06-14 14:07:48,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4667, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4779, PETRI_PLACES=270, PETRI_TRANSITIONS=332} [2024-06-14 14:07:48,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-14 14:07:48,545 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 332 transitions, 4779 flow [2024-06-14 14:07:48,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:48,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:48,545 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] [2024-06-14 14:07:48,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 14:07:48,546 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)] === [2024-06-14 14:07:48,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1567650665, now seen corresponding path program 2 times [2024-06-14 14:07:48,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:48,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069431242] [2024-06-14 14:07:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:48,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:48,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:48,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:48,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069431242] [2024-06-14 14:07:48,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069431242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:48,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:48,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:48,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242888282] [2024-06-14 14:07:48,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:48,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:48,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:48,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:48,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:48,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:48,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 332 transitions, 4779 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:48,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:48,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:48,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:49,872 INFO L124 PetriNetUnfolderBase]: 4342/7579 cut-off events. [2024-06-14 14:07:49,873 INFO L125 PetriNetUnfolderBase]: For 616195/616195 co-relation queries the response was YES. [2024-06-14 14:07:49,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50402 conditions, 7579 events. 4342/7579 cut-off events. For 616195/616195 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55309 event pairs, 1510 based on Foata normal form. 2/7578 useless extension candidates. Maximal degree in co-relation 50273. Up to 6924 conditions per place. [2024-06-14 14:07:49,956 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 316 selfloop transitions, 36 changer transitions 0/359 dead transitions. [2024-06-14 14:07:49,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 359 transitions, 5595 flow [2024-06-14 14:07:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:49,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 14:07:49,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-14 14:07:49,957 INFO L175 Difference]: Start difference. First operand has 270 places, 332 transitions, 4779 flow. Second operand 8 states and 186 transitions. [2024-06-14 14:07:49,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 359 transitions, 5595 flow [2024-06-14 14:07:51,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 359 transitions, 5415 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 14:07:51,091 INFO L231 Difference]: Finished difference. Result has 270 places, 334 transitions, 4730 flow [2024-06-14 14:07:51,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4608, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4730, PETRI_PLACES=270, PETRI_TRANSITIONS=334} [2024-06-14 14:07:51,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-14 14:07:51,091 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 334 transitions, 4730 flow [2024-06-14 14:07:51,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:51,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:51,091 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] [2024-06-14 14:07:51,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 14:07:51,092 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)] === [2024-06-14 14:07:51,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:51,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1620634695, now seen corresponding path program 3 times [2024-06-14 14:07:51,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:51,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457299809] [2024-06-14 14:07:51,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:51,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:51,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:51,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457299809] [2024-06-14 14:07:51,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457299809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:51,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:51,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:51,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864715315] [2024-06-14 14:07:51,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:51,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:51,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:51,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:51,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:51,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:51,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 334 transitions, 4730 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:51,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:51,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:51,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:52,478 INFO L124 PetriNetUnfolderBase]: 4337/7572 cut-off events. [2024-06-14 14:07:52,478 INFO L125 PetriNetUnfolderBase]: For 624488/624488 co-relation queries the response was YES. [2024-06-14 14:07:52,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49992 conditions, 7572 events. 4337/7572 cut-off events. For 624488/624488 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55224 event pairs, 1511 based on Foata normal form. 2/7573 useless extension candidates. Maximal degree in co-relation 49864. Up to 6917 conditions per place. [2024-06-14 14:07:52,566 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 311 selfloop transitions, 35 changer transitions 0/353 dead transitions. [2024-06-14 14:07:52,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 353 transitions, 5468 flow [2024-06-14 14:07:52,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:07:52,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:07:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 14:07:52,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:07:52,567 INFO L175 Difference]: Start difference. First operand has 270 places, 334 transitions, 4730 flow. Second operand 8 states and 180 transitions. [2024-06-14 14:07:52,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 353 transitions, 5468 flow [2024-06-14 14:07:53,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 353 transitions, 5353 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:53,572 INFO L231 Difference]: Finished difference. Result has 272 places, 334 transitions, 4690 flow [2024-06-14 14:07:53,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4615, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4690, PETRI_PLACES=272, PETRI_TRANSITIONS=334} [2024-06-14 14:07:53,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-14 14:07:53,573 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 334 transitions, 4690 flow [2024-06-14 14:07:53,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:53,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:53,573 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] [2024-06-14 14:07:53,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 14:07:53,573 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)] === [2024-06-14 14:07:53,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:53,574 INFO L85 PathProgramCache]: Analyzing trace with hash -885320166, now seen corresponding path program 1 times [2024-06-14 14:07:53,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:53,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653405407] [2024-06-14 14:07:53,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:53,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:53,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:53,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:53,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:53,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653405407] [2024-06-14 14:07:53,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653405407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:53,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:53,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:07:53,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54188079] [2024-06-14 14:07:53,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:53,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:07:53,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:53,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:07:53,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:07:53,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:53,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 334 transitions, 4690 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:53,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:53,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:53,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:54,890 INFO L124 PetriNetUnfolderBase]: 4334/7568 cut-off events. [2024-06-14 14:07:54,890 INFO L125 PetriNetUnfolderBase]: For 634065/634065 co-relation queries the response was YES. [2024-06-14 14:07:54,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49992 conditions, 7568 events. 4334/7568 cut-off events. For 634065/634065 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55195 event pairs, 1510 based on Foata normal form. 1/7568 useless extension candidates. Maximal degree in co-relation 49863. Up to 6738 conditions per place. [2024-06-14 14:07:54,976 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 97 changer transitions 0/365 dead transitions. [2024-06-14 14:07:54,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 365 transitions, 5484 flow [2024-06-14 14:07:54,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:54,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-14 14:07:54,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:07:54,977 INFO L175 Difference]: Start difference. First operand has 272 places, 334 transitions, 4690 flow. Second operand 9 states and 216 transitions. [2024-06-14 14:07:54,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 365 transitions, 5484 flow [2024-06-14 14:07:56,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 365 transitions, 5399 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 14:07:56,174 INFO L231 Difference]: Finished difference. Result has 275 places, 334 transitions, 4811 flow [2024-06-14 14:07:56,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4605, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4811, PETRI_PLACES=275, PETRI_TRANSITIONS=334} [2024-06-14 14:07:56,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-14 14:07:56,175 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 334 transitions, 4811 flow [2024-06-14 14:07:56,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:56,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:56,175 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] [2024-06-14 14:07:56,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 14:07:56,175 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)] === [2024-06-14 14:07:56,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:56,176 INFO L85 PathProgramCache]: Analyzing trace with hash 432064567, now seen corresponding path program 7 times [2024-06-14 14:07:56,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:56,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714450586] [2024-06-14 14:07:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:56,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:56,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:56,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714450586] [2024-06-14 14:07:56,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714450586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:56,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:56,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:56,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678629669] [2024-06-14 14:07:56,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:56,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:56,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:56,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:56,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:56,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:56,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 334 transitions, 4811 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:56,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:56,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:56,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:07:57,534 INFO L124 PetriNetUnfolderBase]: 4344/7586 cut-off events. [2024-06-14 14:07:57,534 INFO L125 PetriNetUnfolderBase]: For 653518/653518 co-relation queries the response was YES. [2024-06-14 14:07:57,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50533 conditions, 7586 events. 4344/7586 cut-off events. For 653518/653518 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55435 event pairs, 1456 based on Foata normal form. 2/7587 useless extension candidates. Maximal degree in co-relation 50403. Up to 6404 conditions per place. [2024-06-14 14:07:57,622 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 234 selfloop transitions, 130 changer transitions 0/371 dead transitions. [2024-06-14 14:07:57,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 371 transitions, 5997 flow [2024-06-14 14:07:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:07:57,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:07:57,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-14 14:07:57,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-14 14:07:57,623 INFO L175 Difference]: Start difference. First operand has 275 places, 334 transitions, 4811 flow. Second operand 9 states and 224 transitions. [2024-06-14 14:07:57,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 371 transitions, 5997 flow [2024-06-14 14:07:58,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 371 transitions, 5731 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 14:07:58,789 INFO L231 Difference]: Finished difference. Result has 274 places, 338 transitions, 4881 flow [2024-06-14 14:07:58,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4881, PETRI_PLACES=274, PETRI_TRANSITIONS=338} [2024-06-14 14:07:58,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-14 14:07:58,790 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 338 transitions, 4881 flow [2024-06-14 14:07:58,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:58,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:07:58,790 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] [2024-06-14 14:07:58,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 14:07:58,790 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)] === [2024-06-14 14:07:58,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:07:58,790 INFO L85 PathProgramCache]: Analyzing trace with hash -196369527, now seen corresponding path program 8 times [2024-06-14 14:07:58,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:07:58,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194949168] [2024-06-14 14:07:58,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:07:58,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:07:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:07:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:07:58,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:07:58,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194949168] [2024-06-14 14:07:58,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194949168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:07:58,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:07:58,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:07:58,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346506587] [2024-06-14 14:07:58,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:07:58,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:07:58,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:07:58,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:07:58,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:07:59,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:07:59,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 338 transitions, 4881 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:07:59,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:07:59,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:07:59,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:00,160 INFO L124 PetriNetUnfolderBase]: 4338/7578 cut-off events. [2024-06-14 14:08:00,160 INFO L125 PetriNetUnfolderBase]: For 648482/648482 co-relation queries the response was YES. [2024-06-14 14:08:00,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50450 conditions, 7578 events. 4338/7578 cut-off events. For 648482/648482 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55275 event pairs, 1456 based on Foata normal form. 2/7579 useless extension candidates. Maximal degree in co-relation 50320. Up to 6401 conditions per place. [2024-06-14 14:08:00,245 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 232 selfloop transitions, 129 changer transitions 0/368 dead transitions. [2024-06-14 14:08:00,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 368 transitions, 5993 flow [2024-06-14 14:08:00,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:00,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-14 14:08:00,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846560846560847 [2024-06-14 14:08:00,246 INFO L175 Difference]: Start difference. First operand has 274 places, 338 transitions, 4881 flow. Second operand 9 states and 221 transitions. [2024-06-14 14:08:00,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 368 transitions, 5993 flow [2024-06-14 14:08:01,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 368 transitions, 5747 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:01,509 INFO L231 Difference]: Finished difference. Result has 277 places, 338 transitions, 4900 flow [2024-06-14 14:08:01,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4635, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4900, PETRI_PLACES=277, PETRI_TRANSITIONS=338} [2024-06-14 14:08:01,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-14 14:08:01,509 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 338 transitions, 4900 flow [2024-06-14 14:08:01,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:01,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:01,509 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] [2024-06-14 14:08:01,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 14:08:01,509 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)] === [2024-06-14 14:08:01,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:01,510 INFO L85 PathProgramCache]: Analyzing trace with hash -545028041, now seen corresponding path program 9 times [2024-06-14 14:08:01,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:01,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046953182] [2024-06-14 14:08:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:01,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:01,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:01,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046953182] [2024-06-14 14:08:01,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046953182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:01,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:01,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:01,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269328269] [2024-06-14 14:08:01,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:01,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:01,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:01,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:01,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:01,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:01,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 338 transitions, 4900 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:01,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:01,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:01,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:02,888 INFO L124 PetriNetUnfolderBase]: 4350/7601 cut-off events. [2024-06-14 14:08:02,889 INFO L125 PetriNetUnfolderBase]: For 667515/667515 co-relation queries the response was YES. [2024-06-14 14:08:02,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50733 conditions, 7601 events. 4350/7601 cut-off events. For 667515/667515 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 55605 event pairs, 1487 based on Foata normal form. 4/7604 useless extension candidates. Maximal degree in co-relation 50602. Up to 6408 conditions per place. [2024-06-14 14:08:02,986 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 225 selfloop transitions, 141 changer transitions 0/373 dead transitions. [2024-06-14 14:08:02,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 373 transitions, 6146 flow [2024-06-14 14:08:02,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-14 14:08:02,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 14:08:02,987 INFO L175 Difference]: Start difference. First operand has 277 places, 338 transitions, 4900 flow. Second operand 10 states and 238 transitions. [2024-06-14 14:08:02,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 373 transitions, 6146 flow [2024-06-14 14:08:04,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 373 transitions, 5876 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:04,206 INFO L231 Difference]: Finished difference. Result has 281 places, 345 transitions, 5099 flow [2024-06-14 14:08:04,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4637, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5099, PETRI_PLACES=281, PETRI_TRANSITIONS=345} [2024-06-14 14:08:04,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-14 14:08:04,207 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 345 transitions, 5099 flow [2024-06-14 14:08:04,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:04,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:04,207 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] [2024-06-14 14:08:04,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 14:08:04,207 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)] === [2024-06-14 14:08:04,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:04,207 INFO L85 PathProgramCache]: Analyzing trace with hash -861117415, now seen corresponding path program 10 times [2024-06-14 14:08:04,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:04,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56388255] [2024-06-14 14:08:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:04,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:04,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:04,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:04,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56388255] [2024-06-14 14:08:04,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56388255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:04,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:04,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:04,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478733166] [2024-06-14 14:08:04,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:04,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:04,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:04,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:04,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:04,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:04,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 345 transitions, 5099 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:04,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:04,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:04,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:05,621 INFO L124 PetriNetUnfolderBase]: 4305/7514 cut-off events. [2024-06-14 14:08:05,622 INFO L125 PetriNetUnfolderBase]: For 670038/670038 co-relation queries the response was YES. [2024-06-14 14:08:05,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50515 conditions, 7514 events. 4305/7514 cut-off events. For 670038/670038 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 54685 event pairs, 1481 based on Foata normal form. 2/7514 useless extension candidates. Maximal degree in co-relation 50382. Up to 6331 conditions per place. [2024-06-14 14:08:05,698 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 202 selfloop transitions, 158 changer transitions 1/368 dead transitions. [2024-06-14 14:08:05,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 368 transitions, 6523 flow [2024-06-14 14:08:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:05,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 14:08:05,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-14 14:08:05,699 INFO L175 Difference]: Start difference. First operand has 281 places, 345 transitions, 5099 flow. Second operand 9 states and 217 transitions. [2024-06-14 14:08:05,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 368 transitions, 6523 flow [2024-06-14 14:08:07,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 368 transitions, 6351 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:07,083 INFO L231 Difference]: Finished difference. Result has 284 places, 344 transitions, 5234 flow [2024-06-14 14:08:07,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5234, PETRI_PLACES=284, PETRI_TRANSITIONS=344} [2024-06-14 14:08:07,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-14 14:08:07,084 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 344 transitions, 5234 flow [2024-06-14 14:08:07,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:07,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:07,084 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] [2024-06-14 14:08:07,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 14:08:07,084 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)] === [2024-06-14 14:08:07,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:07,085 INFO L85 PathProgramCache]: Analyzing trace with hash 44193847, now seen corresponding path program 11 times [2024-06-14 14:08:07,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:07,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227339662] [2024-06-14 14:08:07,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:07,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:07,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:07,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:07,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227339662] [2024-06-14 14:08:07,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227339662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:07,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:07,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299925904] [2024-06-14 14:08:07,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:07,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:07,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:07,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:07,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:07,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:07,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 344 transitions, 5234 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:07,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:07,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:07,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:08,430 INFO L124 PetriNetUnfolderBase]: 4250/7415 cut-off events. [2024-06-14 14:08:08,430 INFO L125 PetriNetUnfolderBase]: For 680118/680118 co-relation queries the response was YES. [2024-06-14 14:08:08,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50145 conditions, 7415 events. 4250/7415 cut-off events. For 680118/680118 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 53802 event pairs, 1460 based on Foata normal form. 2/7416 useless extension candidates. Maximal degree in co-relation 50011. Up to 6756 conditions per place. [2024-06-14 14:08:08,522 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 320 selfloop transitions, 35 changer transitions 1/363 dead transitions. [2024-06-14 14:08:08,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 363 transitions, 5992 flow [2024-06-14 14:08:08,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:08,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 14:08:08,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 14:08:08,523 INFO L175 Difference]: Start difference. First operand has 284 places, 344 transitions, 5234 flow. Second operand 9 states and 198 transitions. [2024-06-14 14:08:08,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 363 transitions, 5992 flow [2024-06-14 14:08:09,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 363 transitions, 5457 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-14 14:08:09,827 INFO L231 Difference]: Finished difference. Result has 282 places, 343 transitions, 4759 flow [2024-06-14 14:08:09,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4699, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4759, PETRI_PLACES=282, PETRI_TRANSITIONS=343} [2024-06-14 14:08:09,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-14 14:08:09,827 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 343 transitions, 4759 flow [2024-06-14 14:08:09,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:09,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:09,828 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] [2024-06-14 14:08:09,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 14:08:09,828 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)] === [2024-06-14 14:08:09,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:09,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1381618293, now seen corresponding path program 12 times [2024-06-14 14:08:09,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:09,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096046368] [2024-06-14 14:08:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:09,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:09,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:09,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:09,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096046368] [2024-06-14 14:08:09,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096046368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:09,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:09,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:09,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033004489] [2024-06-14 14:08:09,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:09,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:09,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:09,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:10,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:10,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 343 transitions, 4759 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:10,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:10,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:10,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:11,236 INFO L124 PetriNetUnfolderBase]: 4195/7316 cut-off events. [2024-06-14 14:08:11,237 INFO L125 PetriNetUnfolderBase]: For 683124/683124 co-relation queries the response was YES. [2024-06-14 14:08:11,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48975 conditions, 7316 events. 4195/7316 cut-off events. For 683124/683124 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 52914 event pairs, 1447 based on Foata normal form. 2/7316 useless extension candidates. Maximal degree in co-relation 48842. Up to 6149 conditions per place. [2024-06-14 14:08:11,308 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 204 selfloop transitions, 154 changer transitions 1/366 dead transitions. [2024-06-14 14:08:11,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 366 transitions, 6029 flow [2024-06-14 14:08:11,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-14 14:08:11,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-14 14:08:11,309 INFO L175 Difference]: Start difference. First operand has 282 places, 343 transitions, 4759 flow. Second operand 10 states and 232 transitions. [2024-06-14 14:08:11,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 366 transitions, 6029 flow [2024-06-14 14:08:12,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 366 transitions, 5872 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-14 14:08:12,293 INFO L231 Difference]: Finished difference. Result has 281 places, 342 transitions, 4904 flow [2024-06-14 14:08:12,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4602, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4904, PETRI_PLACES=281, PETRI_TRANSITIONS=342} [2024-06-14 14:08:12,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-14 14:08:12,294 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 342 transitions, 4904 flow [2024-06-14 14:08:12,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:12,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:12,294 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] [2024-06-14 14:08:12,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 14:08:12,295 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)] === [2024-06-14 14:08:12,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:12,295 INFO L85 PathProgramCache]: Analyzing trace with hash 281083762, now seen corresponding path program 1 times [2024-06-14 14:08:12,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:12,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129497267] [2024-06-14 14:08:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:12,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:12,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:12,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:12,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129497267] [2024-06-14 14:08:12,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129497267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:12,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:12,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:12,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099769347] [2024-06-14 14:08:12,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:12,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:12,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:12,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:12,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:12,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:12,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 342 transitions, 4904 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:12,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:12,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:12,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:13,774 INFO L124 PetriNetUnfolderBase]: 4557/7933 cut-off events. [2024-06-14 14:08:13,774 INFO L125 PetriNetUnfolderBase]: For 884588/884588 co-relation queries the response was YES. [2024-06-14 14:08:13,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56363 conditions, 7933 events. 4557/7933 cut-off events. For 884588/884588 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 58273 event pairs, 1376 based on Foata normal form. 12/7944 useless extension candidates. Maximal degree in co-relation 56229. Up to 6415 conditions per place. [2024-06-14 14:08:13,873 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 329 selfloop transitions, 54 changer transitions 0/390 dead transitions. [2024-06-14 14:08:13,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 390 transitions, 6412 flow [2024-06-14 14:08:13,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:13,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:13,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 14:08:13,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:08:13,875 INFO L175 Difference]: Start difference. First operand has 281 places, 342 transitions, 4904 flow. Second operand 8 states and 196 transitions. [2024-06-14 14:08:13,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 390 transitions, 6412 flow [2024-06-14 14:08:15,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 390 transitions, 5718 flow, removed 5 selfloop flow, removed 15 redundant places. [2024-06-14 14:08:15,510 INFO L231 Difference]: Finished difference. Result has 276 places, 351 transitions, 4540 flow [2024-06-14 14:08:15,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4210, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4540, PETRI_PLACES=276, PETRI_TRANSITIONS=351} [2024-06-14 14:08:15,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-14 14:08:15,511 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 351 transitions, 4540 flow [2024-06-14 14:08:15,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:15,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:15,511 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] [2024-06-14 14:08:15,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 14:08:15,511 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)] === [2024-06-14 14:08:15,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:15,511 INFO L85 PathProgramCache]: Analyzing trace with hash 184501814, now seen corresponding path program 2 times [2024-06-14 14:08:15,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:15,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264138909] [2024-06-14 14:08:15,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:15,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:15,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:15,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264138909] [2024-06-14 14:08:15,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264138909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:15,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:15,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:15,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045902091] [2024-06-14 14:08:15,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:15,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:15,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:15,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:15,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:15,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:15,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 351 transitions, 4540 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:15,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:15,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:15,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:17,128 INFO L124 PetriNetUnfolderBase]: 4677/8138 cut-off events. [2024-06-14 14:08:17,128 INFO L125 PetriNetUnfolderBase]: For 958446/958446 co-relation queries the response was YES. [2024-06-14 14:08:17,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58647 conditions, 8138 events. 4677/8138 cut-off events. For 958446/958446 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 59918 event pairs, 1569 based on Foata normal form. 18/8155 useless extension candidates. Maximal degree in co-relation 58511. Up to 6913 conditions per place. [2024-06-14 14:08:17,217 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 287 selfloop transitions, 98 changer transitions 0/392 dead transitions. [2024-06-14 14:08:17,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 392 transitions, 5782 flow [2024-06-14 14:08:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-14 14:08:17,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-14 14:08:17,218 INFO L175 Difference]: Start difference. First operand has 276 places, 351 transitions, 4540 flow. Second operand 10 states and 237 transitions. [2024-06-14 14:08:17,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 392 transitions, 5782 flow [2024-06-14 14:08:18,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 392 transitions, 5681 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:18,748 INFO L231 Difference]: Finished difference. Result has 284 places, 358 transitions, 4874 flow [2024-06-14 14:08:18,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4439, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4874, PETRI_PLACES=284, PETRI_TRANSITIONS=358} [2024-06-14 14:08:18,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-14 14:08:18,748 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 358 transitions, 4874 flow [2024-06-14 14:08:18,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:18,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:18,749 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] [2024-06-14 14:08:18,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 14:08:18,749 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)] === [2024-06-14 14:08:18,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:18,749 INFO L85 PathProgramCache]: Analyzing trace with hash -536439212, now seen corresponding path program 3 times [2024-06-14 14:08:18,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:18,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421177933] [2024-06-14 14:08:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:18,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:18,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:18,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421177933] [2024-06-14 14:08:18,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421177933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:18,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:18,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:18,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265068364] [2024-06-14 14:08:18,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:18,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:18,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:18,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:18,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:18,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:18,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 358 transitions, 4874 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:18,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:18,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:18,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:20,317 INFO L124 PetriNetUnfolderBase]: 4737/8201 cut-off events. [2024-06-14 14:08:20,317 INFO L125 PetriNetUnfolderBase]: For 989747/989747 co-relation queries the response was YES. [2024-06-14 14:08:20,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59721 conditions, 8201 events. 4737/8201 cut-off events. For 989747/989747 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 60159 event pairs, 1358 based on Foata normal form. 18/8218 useless extension candidates. Maximal degree in co-relation 59582. Up to 6731 conditions per place. [2024-06-14 14:08:20,424 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 283 selfloop transitions, 112 changer transitions 2/404 dead transitions. [2024-06-14 14:08:20,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 404 transitions, 6007 flow [2024-06-14 14:08:20,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:20,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:20,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 14:08:20,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:08:20,425 INFO L175 Difference]: Start difference. First operand has 284 places, 358 transitions, 4874 flow. Second operand 10 states and 245 transitions. [2024-06-14 14:08:20,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 404 transitions, 6007 flow [2024-06-14 14:08:22,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 404 transitions, 5795 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:22,044 INFO L231 Difference]: Finished difference. Result has 288 places, 359 transitions, 4922 flow [2024-06-14 14:08:22,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4662, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4922, PETRI_PLACES=288, PETRI_TRANSITIONS=359} [2024-06-14 14:08:22,044 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-14 14:08:22,044 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 359 transitions, 4922 flow [2024-06-14 14:08:22,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:22,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:22,044 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] [2024-06-14 14:08:22,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 14:08:22,045 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)] === [2024-06-14 14:08:22,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:22,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1165023966, now seen corresponding path program 4 times [2024-06-14 14:08:22,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:22,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632154892] [2024-06-14 14:08:22,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:22,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:22,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:22,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:22,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632154892] [2024-06-14 14:08:22,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632154892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:22,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:22,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:22,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507198891] [2024-06-14 14:08:22,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:22,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:22,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:22,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:22,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:22,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:22,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 359 transitions, 4922 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:22,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:22,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:22,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:23,633 INFO L124 PetriNetUnfolderBase]: 4797/8308 cut-off events. [2024-06-14 14:08:23,633 INFO L125 PetriNetUnfolderBase]: For 1031963/1031963 co-relation queries the response was YES. [2024-06-14 14:08:23,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60446 conditions, 8308 events. 4797/8308 cut-off events. For 1031963/1031963 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 61179 event pairs, 1605 based on Foata normal form. 24/8331 useless extension candidates. Maximal degree in co-relation 60305. Up to 7334 conditions per place. [2024-06-14 14:08:23,731 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 291 selfloop transitions, 98 changer transitions 2/398 dead transitions. [2024-06-14 14:08:23,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 398 transitions, 5855 flow [2024-06-14 14:08:23,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:23,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:23,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-14 14:08:23,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-14 14:08:23,731 INFO L175 Difference]: Start difference. First operand has 288 places, 359 transitions, 4922 flow. Second operand 10 states and 237 transitions. [2024-06-14 14:08:23,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 398 transitions, 5855 flow [2024-06-14 14:08:25,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 398 transitions, 5653 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:25,581 INFO L231 Difference]: Finished difference. Result has 291 places, 360 transitions, 4952 flow [2024-06-14 14:08:25,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4952, PETRI_PLACES=291, PETRI_TRANSITIONS=360} [2024-06-14 14:08:25,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-14 14:08:25,582 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 360 transitions, 4952 flow [2024-06-14 14:08:25,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:25,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:25,582 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] [2024-06-14 14:08:25,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 14:08:25,582 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)] === [2024-06-14 14:08:25,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:25,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1979178926, now seen corresponding path program 5 times [2024-06-14 14:08:25,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:25,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309969508] [2024-06-14 14:08:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:25,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:25,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:25,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309969508] [2024-06-14 14:08:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309969508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:25,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:25,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:25,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370784245] [2024-06-14 14:08:25,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:25,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:25,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:25,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:25,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:25,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:25,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 360 transitions, 4952 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:25,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:25,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:25,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:27,112 INFO L124 PetriNetUnfolderBase]: 4746/8221 cut-off events. [2024-06-14 14:08:27,113 INFO L125 PetriNetUnfolderBase]: For 992416/992416 co-relation queries the response was YES. [2024-06-14 14:08:27,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58745 conditions, 8221 events. 4746/8221 cut-off events. For 992416/992416 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 60398 event pairs, 1581 based on Foata normal form. 24/8244 useless extension candidates. Maximal degree in co-relation 58603. Up to 7260 conditions per place. [2024-06-14 14:08:27,219 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 293 selfloop transitions, 90 changer transitions 1/391 dead transitions. [2024-06-14 14:08:27,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 391 transitions, 5838 flow [2024-06-14 14:08:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:27,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-14 14:08:27,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-14 14:08:27,220 INFO L175 Difference]: Start difference. First operand has 291 places, 360 transitions, 4952 flow. Second operand 9 states and 212 transitions. [2024-06-14 14:08:27,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 391 transitions, 5838 flow [2024-06-14 14:08:28,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 391 transitions, 5636 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:28,990 INFO L231 Difference]: Finished difference. Result has 292 places, 361 transitions, 4960 flow [2024-06-14 14:08:28,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4750, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4960, PETRI_PLACES=292, PETRI_TRANSITIONS=361} [2024-06-14 14:08:28,991 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-14 14:08:28,991 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 361 transitions, 4960 flow [2024-06-14 14:08:28,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:28,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:28,991 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] [2024-06-14 14:08:28,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 14:08:28,991 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)] === [2024-06-14 14:08:28,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:28,991 INFO L85 PathProgramCache]: Analyzing trace with hash -530713760, now seen corresponding path program 1 times [2024-06-14 14:08:28,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:28,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680827865] [2024-06-14 14:08:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:28,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:28,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:29,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:29,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680827865] [2024-06-14 14:08:29,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680827865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:29,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:29,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:29,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096145518] [2024-06-14 14:08:29,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:29,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:29,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:29,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:29,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:29,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:29,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 361 transitions, 4960 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:29,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:29,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:29,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:30,552 INFO L124 PetriNetUnfolderBase]: 4729/8222 cut-off events. [2024-06-14 14:08:30,552 INFO L125 PetriNetUnfolderBase]: For 965439/965439 co-relation queries the response was YES. [2024-06-14 14:08:30,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58349 conditions, 8222 events. 4729/8222 cut-off events. For 965439/965439 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 60556 event pairs, 1566 based on Foata normal form. 18/8239 useless extension candidates. Maximal degree in co-relation 58206. Up to 6965 conditions per place. [2024-06-14 14:08:30,650 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 290 selfloop transitions, 99 changer transitions 0/396 dead transitions. [2024-06-14 14:08:30,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 396 transitions, 5911 flow [2024-06-14 14:08:30,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:30,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-14 14:08:30,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-14 14:08:30,651 INFO L175 Difference]: Start difference. First operand has 292 places, 361 transitions, 4960 flow. Second operand 9 states and 215 transitions. [2024-06-14 14:08:30,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 396 transitions, 5911 flow [2024-06-14 14:08:32,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 396 transitions, 5721 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:32,618 INFO L231 Difference]: Finished difference. Result has 294 places, 364 transitions, 5060 flow [2024-06-14 14:08:32,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4770, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5060, PETRI_PLACES=294, PETRI_TRANSITIONS=364} [2024-06-14 14:08:32,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-14 14:08:32,618 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 364 transitions, 5060 flow [2024-06-14 14:08:32,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:32,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:32,619 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] [2024-06-14 14:08:32,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 14:08:32,619 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)] === [2024-06-14 14:08:32,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:32,619 INFO L85 PathProgramCache]: Analyzing trace with hash -260727934, now seen corresponding path program 6 times [2024-06-14 14:08:32,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:32,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963345399] [2024-06-14 14:08:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:32,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:32,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:32,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:32,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963345399] [2024-06-14 14:08:32,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963345399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:32,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:32,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:32,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951895387] [2024-06-14 14:08:32,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:32,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:32,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:32,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:32,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:32,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:32,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 364 transitions, 5060 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:32,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:32,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:32,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:34,115 INFO L124 PetriNetUnfolderBase]: 4661/8066 cut-off events. [2024-06-14 14:08:34,115 INFO L125 PetriNetUnfolderBase]: For 913563/913563 co-relation queries the response was YES. [2024-06-14 14:08:34,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56716 conditions, 8066 events. 4661/8066 cut-off events. For 913563/913563 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 58892 event pairs, 1536 based on Foata normal form. 16/8080 useless extension candidates. Maximal degree in co-relation 56572. Up to 7161 conditions per place. [2024-06-14 14:08:34,217 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 292 selfloop transitions, 85 changer transitions 2/386 dead transitions. [2024-06-14 14:08:34,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 386 transitions, 5882 flow [2024-06-14 14:08:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:34,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:34,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 14:08:34,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-14 14:08:34,218 INFO L175 Difference]: Start difference. First operand has 294 places, 364 transitions, 5060 flow. Second operand 8 states and 187 transitions. [2024-06-14 14:08:34,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 386 transitions, 5882 flow [2024-06-14 14:08:36,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 386 transitions, 5623 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:36,151 INFO L231 Difference]: Finished difference. Result has 295 places, 362 transitions, 4948 flow [2024-06-14 14:08:36,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4801, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4948, PETRI_PLACES=295, PETRI_TRANSITIONS=362} [2024-06-14 14:08:36,151 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-14 14:08:36,151 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 362 transitions, 4948 flow [2024-06-14 14:08:36,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:36,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:36,152 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] [2024-06-14 14:08:36,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 14:08:36,152 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)] === [2024-06-14 14:08:36,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:36,152 INFO L85 PathProgramCache]: Analyzing trace with hash -4012222, now seen corresponding path program 2 times [2024-06-14 14:08:36,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:36,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016397008] [2024-06-14 14:08:36,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:36,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:36,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:36,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:36,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016397008] [2024-06-14 14:08:36,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016397008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:36,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:36,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:36,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192121877] [2024-06-14 14:08:36,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:36,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:36,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:36,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:36,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:36,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:36,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 362 transitions, 4948 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:36,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:36,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:36,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:37,659 INFO L124 PetriNetUnfolderBase]: 4589/7950 cut-off events. [2024-06-14 14:08:37,659 INFO L125 PetriNetUnfolderBase]: For 914215/914215 co-relation queries the response was YES. [2024-06-14 14:08:37,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56119 conditions, 7950 events. 4589/7950 cut-off events. For 914215/914215 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 57965 event pairs, 1482 based on Foata normal form. 12/7960 useless extension candidates. Maximal degree in co-relation 55974. Up to 6989 conditions per place. [2024-06-14 14:08:37,759 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 293 selfloop transitions, 89 changer transitions 0/389 dead transitions. [2024-06-14 14:08:37,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 389 transitions, 5846 flow [2024-06-14 14:08:37,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 14:08:37,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-14 14:08:37,760 INFO L175 Difference]: Start difference. First operand has 295 places, 362 transitions, 4948 flow. Second operand 8 states and 191 transitions. [2024-06-14 14:08:37,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 389 transitions, 5846 flow [2024-06-14 14:08:39,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 389 transitions, 5593 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:39,483 INFO L231 Difference]: Finished difference. Result has 295 places, 364 transitions, 4940 flow [2024-06-14 14:08:39,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4695, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4940, PETRI_PLACES=295, PETRI_TRANSITIONS=364} [2024-06-14 14:08:39,484 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-14 14:08:39,484 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 364 transitions, 4940 flow [2024-06-14 14:08:39,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:39,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:39,484 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] [2024-06-14 14:08:39,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 14:08:39,484 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)] === [2024-06-14 14:08:39,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:39,485 INFO L85 PathProgramCache]: Analyzing trace with hash 5184548, now seen corresponding path program 3 times [2024-06-14 14:08:39,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:39,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468293925] [2024-06-14 14:08:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:39,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:39,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:39,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468293925] [2024-06-14 14:08:39,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468293925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:39,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:39,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:39,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520525402] [2024-06-14 14:08:39,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:39,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:39,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:39,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:39,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:39,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:39,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 364 transitions, 4940 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:39,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:39,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:39,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:40,954 INFO L124 PetriNetUnfolderBase]: 4596/7959 cut-off events. [2024-06-14 14:08:40,954 INFO L125 PetriNetUnfolderBase]: For 906945/906945 co-relation queries the response was YES. [2024-06-14 14:08:41,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55716 conditions, 7959 events. 4596/7959 cut-off events. For 906945/906945 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 57997 event pairs, 1471 based on Foata normal form. 12/7969 useless extension candidates. Maximal degree in co-relation 55570. Up to 6550 conditions per place. [2024-06-14 14:08:41,056 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 276 selfloop transitions, 108 changer transitions 0/391 dead transitions. [2024-06-14 14:08:41,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 391 transitions, 5814 flow [2024-06-14 14:08:41,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:41,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:41,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 14:08:41,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-14 14:08:41,057 INFO L175 Difference]: Start difference. First operand has 295 places, 364 transitions, 4940 flow. Second operand 8 states and 191 transitions. [2024-06-14 14:08:41,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 391 transitions, 5814 flow [2024-06-14 14:08:42,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 391 transitions, 5589 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 14:08:42,706 INFO L231 Difference]: Finished difference. Result has 297 places, 365 transitions, 4966 flow [2024-06-14 14:08:42,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4715, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4966, PETRI_PLACES=297, PETRI_TRANSITIONS=365} [2024-06-14 14:08:42,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-14 14:08:42,706 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 365 transitions, 4966 flow [2024-06-14 14:08:42,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:42,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:42,706 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] [2024-06-14 14:08:42,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 14:08:42,707 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)] === [2024-06-14 14:08:42,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:42,707 INFO L85 PathProgramCache]: Analyzing trace with hash -2118986272, now seen corresponding path program 1 times [2024-06-14 14:08:42,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:42,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472614747] [2024-06-14 14:08:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:42,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:42,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:42,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:42,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472614747] [2024-06-14 14:08:42,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472614747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:42,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:42,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:42,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027123636] [2024-06-14 14:08:42,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:42,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:42,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:42,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:42,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:42,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:42,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 365 transitions, 4966 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:42,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:42,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:42,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:44,184 INFO L124 PetriNetUnfolderBase]: 4622/8005 cut-off events. [2024-06-14 14:08:44,184 INFO L125 PetriNetUnfolderBase]: For 888921/888921 co-relation queries the response was YES. [2024-06-14 14:08:44,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56361 conditions, 8005 events. 4622/8005 cut-off events. For 888921/888921 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58293 event pairs, 1482 based on Foata normal form. 2/8006 useless extension candidates. Maximal degree in co-relation 56214. Up to 7053 conditions per place. [2024-06-14 14:08:44,289 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 274 selfloop transitions, 115 changer transitions 0/396 dead transitions. [2024-06-14 14:08:44,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 396 transitions, 6130 flow [2024-06-14 14:08:44,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:44,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:08:44,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-14 14:08:44,290 INFO L175 Difference]: Start difference. First operand has 297 places, 365 transitions, 4966 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:08:44,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 396 transitions, 6130 flow [2024-06-14 14:08:46,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 396 transitions, 5786 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:46,276 INFO L231 Difference]: Finished difference. Result has 297 places, 374 transitions, 5099 flow [2024-06-14 14:08:46,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4622, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5099, PETRI_PLACES=297, PETRI_TRANSITIONS=374} [2024-06-14 14:08:46,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-14 14:08:46,276 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 374 transitions, 5099 flow [2024-06-14 14:08:46,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:46,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:46,277 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] [2024-06-14 14:08:46,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 14:08:46,277 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)] === [2024-06-14 14:08:46,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:46,277 INFO L85 PathProgramCache]: Analyzing trace with hash -2114338132, now seen corresponding path program 2 times [2024-06-14 14:08:46,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:46,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760296587] [2024-06-14 14:08:46,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:46,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:46,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:46,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760296587] [2024-06-14 14:08:46,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760296587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:46,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:46,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:46,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57955592] [2024-06-14 14:08:46,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:46,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:46,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:46,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:46,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:46,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:46,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 374 transitions, 5099 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:46,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:46,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:46,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:47,835 INFO L124 PetriNetUnfolderBase]: 4627/8010 cut-off events. [2024-06-14 14:08:47,836 INFO L125 PetriNetUnfolderBase]: For 899390/899390 co-relation queries the response was YES. [2024-06-14 14:08:47,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56122 conditions, 8010 events. 4627/8010 cut-off events. For 899390/899390 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58481 event pairs, 1481 based on Foata normal form. 1/8010 useless extension candidates. Maximal degree in co-relation 55975. Up to 7057 conditions per place. [2024-06-14 14:08:47,941 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 250 selfloop transitions, 147 changer transitions 0/404 dead transitions. [2024-06-14 14:08:47,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 404 transitions, 6399 flow [2024-06-14 14:08:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:47,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:47,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-14 14:08:47,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432900432900433 [2024-06-14 14:08:47,942 INFO L175 Difference]: Start difference. First operand has 297 places, 374 transitions, 5099 flow. Second operand 11 states and 251 transitions. [2024-06-14 14:08:47,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 404 transitions, 6399 flow [2024-06-14 14:08:50,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 404 transitions, 6221 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:50,036 INFO L231 Difference]: Finished difference. Result has 303 places, 378 transitions, 5300 flow [2024-06-14 14:08:50,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5300, PETRI_PLACES=303, PETRI_TRANSITIONS=378} [2024-06-14 14:08:50,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-14 14:08:50,037 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 378 transitions, 5300 flow [2024-06-14 14:08:50,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:50,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:50,037 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] [2024-06-14 14:08:50,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 14:08:50,037 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)] === [2024-06-14 14:08:50,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:50,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1941854752, now seen corresponding path program 3 times [2024-06-14 14:08:50,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:50,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594279003] [2024-06-14 14:08:50,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:50,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:50,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:50,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594279003] [2024-06-14 14:08:50,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594279003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:50,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:50,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:50,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410139749] [2024-06-14 14:08:50,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:50,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:50,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:50,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:50,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:50,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:50,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 378 transitions, 5300 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:50,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:50,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:50,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:51,572 INFO L124 PetriNetUnfolderBase]: 4624/8006 cut-off events. [2024-06-14 14:08:51,572 INFO L125 PetriNetUnfolderBase]: For 895563/895563 co-relation queries the response was YES. [2024-06-14 14:08:51,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56098 conditions, 8006 events. 4624/8006 cut-off events. For 895563/895563 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58314 event pairs, 1481 based on Foata normal form. 1/8006 useless extension candidates. Maximal degree in co-relation 55951. Up to 7055 conditions per place. [2024-06-14 14:08:51,674 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 261 selfloop transitions, 134 changer transitions 0/402 dead transitions. [2024-06-14 14:08:51,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 402 transitions, 6336 flow [2024-06-14 14:08:51,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:51,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-14 14:08:51,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-14 14:08:51,675 INFO L175 Difference]: Start difference. First operand has 303 places, 378 transitions, 5300 flow. Second operand 10 states and 231 transitions. [2024-06-14 14:08:51,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 402 transitions, 6336 flow [2024-06-14 14:08:53,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 402 transitions, 6187 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:53,453 INFO L231 Difference]: Finished difference. Result has 306 places, 378 transitions, 5440 flow [2024-06-14 14:08:53,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5153, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5440, PETRI_PLACES=306, PETRI_TRANSITIONS=378} [2024-06-14 14:08:53,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-14 14:08:53,454 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 378 transitions, 5440 flow [2024-06-14 14:08:53,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:53,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:53,454 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] [2024-06-14 14:08:53,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 14:08:53,454 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)] === [2024-06-14 14:08:53,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:53,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2000081440, now seen corresponding path program 4 times [2024-06-14 14:08:53,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:53,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131386221] [2024-06-14 14:08:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:53,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:53,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:53,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131386221] [2024-06-14 14:08:53,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131386221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:53,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:53,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:53,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441354852] [2024-06-14 14:08:53,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:53,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:53,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:53,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:53,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:53,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:53,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 378 transitions, 5440 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:53,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:53,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:53,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:54,938 INFO L124 PetriNetUnfolderBase]: 4634/8024 cut-off events. [2024-06-14 14:08:54,939 INFO L125 PetriNetUnfolderBase]: For 901534/901534 co-relation queries the response was YES. [2024-06-14 14:08:55,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56565 conditions, 8024 events. 4634/8024 cut-off events. For 901534/901534 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58488 event pairs, 1481 based on Foata normal form. 2/8025 useless extension candidates. Maximal degree in co-relation 56417. Up to 6828 conditions per place. [2024-06-14 14:08:55,042 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 151 changer transitions 0/412 dead transitions. [2024-06-14 14:08:55,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 412 transitions, 6772 flow [2024-06-14 14:08:55,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:55,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:55,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-14 14:08:55,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-14 14:08:55,043 INFO L175 Difference]: Start difference. First operand has 306 places, 378 transitions, 5440 flow. Second operand 9 states and 219 transitions. [2024-06-14 14:08:55,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 412 transitions, 6772 flow [2024-06-14 14:08:57,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 412 transitions, 6390 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-14 14:08:57,634 INFO L231 Difference]: Finished difference. Result has 304 places, 382 transitions, 5446 flow [2024-06-14 14:08:57,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5062, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5446, PETRI_PLACES=304, PETRI_TRANSITIONS=382} [2024-06-14 14:08:57,635 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-14 14:08:57,635 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 382 transitions, 5446 flow [2024-06-14 14:08:57,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:57,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:57,635 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] [2024-06-14 14:08:57,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 14:08:57,635 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)] === [2024-06-14 14:08:57,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:57,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1675340320, now seen corresponding path program 5 times [2024-06-14 14:08:57,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:57,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506113206] [2024-06-14 14:08:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:57,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:57,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:57,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506113206] [2024-06-14 14:08:57,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506113206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:57,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:57,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:57,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644821770] [2024-06-14 14:08:57,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:57,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:57,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:57,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:57,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:57,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:08:57,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 382 transitions, 5446 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:57,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:57,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:08:57,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:59,154 INFO L124 PetriNetUnfolderBase]: 4644/8042 cut-off events. [2024-06-14 14:08:59,155 INFO L125 PetriNetUnfolderBase]: For 901552/901552 co-relation queries the response was YES. [2024-06-14 14:08:59,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56771 conditions, 8042 events. 4644/8042 cut-off events. For 901552/901552 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58604 event pairs, 1481 based on Foata normal form. 2/8043 useless extension candidates. Maximal degree in co-relation 56623. Up to 6838 conditions per place. [2024-06-14 14:08:59,265 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 160 changer transitions 0/414 dead transitions. [2024-06-14 14:08:59,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 414 transitions, 6784 flow [2024-06-14 14:08:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:59,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-14 14:08:59,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-14 14:08:59,266 INFO L175 Difference]: Start difference. First operand has 304 places, 382 transitions, 5446 flow. Second operand 10 states and 237 transitions. [2024-06-14 14:08:59,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 414 transitions, 6784 flow [2024-06-14 14:09:01,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 414 transitions, 6471 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:01,253 INFO L231 Difference]: Finished difference. Result has 308 places, 386 transitions, 5542 flow [2024-06-14 14:09:01,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5146, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5542, PETRI_PLACES=308, PETRI_TRANSITIONS=386} [2024-06-14 14:09:01,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-14 14:09:01,253 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 386 transitions, 5542 flow [2024-06-14 14:09:01,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:01,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:01,253 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] [2024-06-14 14:09:01,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 14:09:01,253 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)] === [2024-06-14 14:09:01,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:01,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1085911392, now seen corresponding path program 6 times [2024-06-14 14:09:01,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:01,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319878422] [2024-06-14 14:09:01,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:01,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:01,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:01,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:01,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319878422] [2024-06-14 14:09:01,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319878422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:01,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:01,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:01,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065517014] [2024-06-14 14:09:01,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:01,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:01,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:01,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:01,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:01,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:01,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 386 transitions, 5542 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:01,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:01,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:01,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:02,886 INFO L124 PetriNetUnfolderBase]: 4638/8034 cut-off events. [2024-06-14 14:09:02,886 INFO L125 PetriNetUnfolderBase]: For 912130/912130 co-relation queries the response was YES. [2024-06-14 14:09:02,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56537 conditions, 8034 events. 4638/8034 cut-off events. For 912130/912130 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58558 event pairs, 1481 based on Foata normal form. 2/8035 useless extension candidates. Maximal degree in co-relation 56389. Up to 6833 conditions per place. [2024-06-14 14:09:02,972 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 242 selfloop transitions, 164 changer transitions 0/413 dead transitions. [2024-06-14 14:09:02,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 413 transitions, 6610 flow [2024-06-14 14:09:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:02,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-14 14:09:02,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2024-06-14 14:09:02,975 INFO L175 Difference]: Start difference. First operand has 308 places, 386 transitions, 5542 flow. Second operand 10 states and 236 transitions. [2024-06-14 14:09:02,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 413 transitions, 6610 flow [2024-06-14 14:09:05,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 413 transitions, 6267 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:05,326 INFO L231 Difference]: Finished difference. Result has 311 places, 386 transitions, 5535 flow [2024-06-14 14:09:05,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5199, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5535, PETRI_PLACES=311, PETRI_TRANSITIONS=386} [2024-06-14 14:09:05,327 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-14 14:09:05,327 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 386 transitions, 5535 flow [2024-06-14 14:09:05,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:05,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:05,327 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] [2024-06-14 14:09:05,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 14:09:05,327 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)] === [2024-06-14 14:09:05,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:05,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1272612956, now seen corresponding path program 7 times [2024-06-14 14:09:05,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:05,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756061714] [2024-06-14 14:09:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:05,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:05,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:05,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:05,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756061714] [2024-06-14 14:09:05,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756061714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:05,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:05,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:05,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939639753] [2024-06-14 14:09:05,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:05,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:05,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:05,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:05,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:05,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:05,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 386 transitions, 5535 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:05,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:05,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:05,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:06,834 INFO L124 PetriNetUnfolderBase]: 4643/8042 cut-off events. [2024-06-14 14:09:06,834 INFO L125 PetriNetUnfolderBase]: For 925822/925822 co-relation queries the response was YES. [2024-06-14 14:09:06,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56778 conditions, 8042 events. 4643/8042 cut-off events. For 925822/925822 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58658 event pairs, 1489 based on Foata normal form. 1/8041 useless extension candidates. Maximal degree in co-relation 56629. Up to 6837 conditions per place. [2024-06-14 14:09:06,940 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 210 selfloop transitions, 193 changer transitions 0/410 dead transitions. [2024-06-14 14:09:06,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 410 transitions, 6823 flow [2024-06-14 14:09:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:06,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:06,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-14 14:09:06,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-14 14:09:06,942 INFO L175 Difference]: Start difference. First operand has 311 places, 386 transitions, 5535 flow. Second operand 9 states and 212 transitions. [2024-06-14 14:09:06,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 410 transitions, 6823 flow [2024-06-14 14:09:09,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 410 transitions, 6337 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-14 14:09:09,382 INFO L231 Difference]: Finished difference. Result has 308 places, 389 transitions, 5489 flow [2024-06-14 14:09:09,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5057, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5489, PETRI_PLACES=308, PETRI_TRANSITIONS=389} [2024-06-14 14:09:09,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-14 14:09:09,383 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 389 transitions, 5489 flow [2024-06-14 14:09:09,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:09,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:09,383 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] [2024-06-14 14:09:09,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 14:09:09,384 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)] === [2024-06-14 14:09:09,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:09,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1634551884, now seen corresponding path program 8 times [2024-06-14 14:09:09,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:09,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444149732] [2024-06-14 14:09:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:09,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:09,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:09,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444149732] [2024-06-14 14:09:09,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444149732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:09,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:09,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:09,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286984471] [2024-06-14 14:09:09,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:09,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:09,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:09,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:09,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:09,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:09,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 389 transitions, 5489 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:09,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:09,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:09,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:10,939 INFO L124 PetriNetUnfolderBase]: 4648/8055 cut-off events. [2024-06-14 14:09:10,939 INFO L125 PetriNetUnfolderBase]: For 945087/945087 co-relation queries the response was YES. [2024-06-14 14:09:11,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56836 conditions, 8055 events. 4648/8055 cut-off events. For 945087/945087 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 58792 event pairs, 1493 based on Foata normal form. 1/8054 useless extension candidates. Maximal degree in co-relation 56688. Up to 6841 conditions per place. [2024-06-14 14:09:11,043 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 221 selfloop transitions, 186 changer transitions 0/414 dead transitions. [2024-06-14 14:09:11,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 414 transitions, 6789 flow [2024-06-14 14:09:11,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:11,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:11,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-14 14:09:11,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:09:11,044 INFO L175 Difference]: Start difference. First operand has 308 places, 389 transitions, 5489 flow. Second operand 10 states and 230 transitions. [2024-06-14 14:09:11,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 414 transitions, 6789 flow [2024-06-14 14:09:13,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 414 transitions, 6348 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:13,261 INFO L231 Difference]: Finished difference. Result has 311 places, 392 transitions, 5473 flow [2024-06-14 14:09:13,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5056, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5473, PETRI_PLACES=311, PETRI_TRANSITIONS=392} [2024-06-14 14:09:13,262 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-14 14:09:13,262 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 392 transitions, 5473 flow [2024-06-14 14:09:13,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:13,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:13,262 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] [2024-06-14 14:09:13,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 14:09:13,262 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)] === [2024-06-14 14:09:13,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:13,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1633743624, now seen corresponding path program 9 times [2024-06-14 14:09:13,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:13,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274012026] [2024-06-14 14:09:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:13,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:13,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:13,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:13,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274012026] [2024-06-14 14:09:13,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274012026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:13,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:13,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:13,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040890582] [2024-06-14 14:09:13,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:13,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:13,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:13,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:13,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:13,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:13,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 392 transitions, 5473 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:13,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:13,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:13,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:14,794 INFO L124 PetriNetUnfolderBase]: 4645/8047 cut-off events. [2024-06-14 14:09:14,794 INFO L125 PetriNetUnfolderBase]: For 957276/957276 co-relation queries the response was YES. [2024-06-14 14:09:14,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56867 conditions, 8047 events. 4645/8047 cut-off events. For 957276/957276 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58678 event pairs, 1489 based on Foata normal form. 1/8046 useless extension candidates. Maximal degree in co-relation 56718. Up to 6839 conditions per place. [2024-06-14 14:09:14,904 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 222 selfloop transitions, 184 changer transitions 0/413 dead transitions. [2024-06-14 14:09:14,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 413 transitions, 6531 flow [2024-06-14 14:09:14,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:14,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:14,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-14 14:09:14,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-14 14:09:14,905 INFO L175 Difference]: Start difference. First operand has 311 places, 392 transitions, 5473 flow. Second operand 10 states and 228 transitions. [2024-06-14 14:09:14,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 413 transitions, 6531 flow [2024-06-14 14:09:17,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 413 transitions, 6052 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 14:09:17,240 INFO L231 Difference]: Finished difference. Result has 312 places, 392 transitions, 5370 flow [2024-06-14 14:09:17,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4994, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5370, PETRI_PLACES=312, PETRI_TRANSITIONS=392} [2024-06-14 14:09:17,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-14 14:09:17,240 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 392 transitions, 5370 flow [2024-06-14 14:09:17,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:17,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:17,241 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] [2024-06-14 14:09:17,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 14:09:17,241 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:17,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:17,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1618226520, now seen corresponding path program 1 times [2024-06-14 14:09:17,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:17,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170743423] [2024-06-14 14:09:17,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:17,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:17,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:17,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170743423] [2024-06-14 14:09:17,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170743423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:17,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:17,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:17,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890616987] [2024-06-14 14:09:17,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:17,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:17,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:17,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:17,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:17,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 392 transitions, 5370 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:17,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:17,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:17,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:18,787 INFO L124 PetriNetUnfolderBase]: 4632/8029 cut-off events. [2024-06-14 14:09:18,788 INFO L125 PetriNetUnfolderBase]: For 972086/972086 co-relation queries the response was YES. [2024-06-14 14:09:18,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56283 conditions, 8029 events. 4632/8029 cut-off events. For 972086/972086 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 58712 event pairs, 1307 based on Foata normal form. 6/8034 useless extension candidates. Maximal degree in co-relation 56133. Up to 7087 conditions per place. [2024-06-14 14:09:18,886 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 378 selfloop transitions, 37 changer transitions 0/422 dead transitions. [2024-06-14 14:09:18,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 422 transitions, 6518 flow [2024-06-14 14:09:18,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:18,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:18,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:09:18,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-14 14:09:18,887 INFO L175 Difference]: Start difference. First operand has 312 places, 392 transitions, 5370 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:09:18,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 422 transitions, 6518 flow [2024-06-14 14:09:21,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 422 transitions, 6051 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-14 14:09:21,140 INFO L231 Difference]: Finished difference. Result has 309 places, 392 transitions, 4981 flow [2024-06-14 14:09:21,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4903, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4981, PETRI_PLACES=309, PETRI_TRANSITIONS=392} [2024-06-14 14:09:21,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-14 14:09:21,141 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 392 transitions, 4981 flow [2024-06-14 14:09:21,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:21,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:21,141 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] [2024-06-14 14:09:21,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 14:09:21,141 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:21,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:21,141 INFO L85 PathProgramCache]: Analyzing trace with hash -535279930, now seen corresponding path program 2 times [2024-06-14 14:09:21,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:21,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286506271] [2024-06-14 14:09:21,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:21,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:21,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:21,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:21,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286506271] [2024-06-14 14:09:21,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286506271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:21,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:21,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:21,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736015284] [2024-06-14 14:09:21,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:21,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:21,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:21,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:21,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:21,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 392 transitions, 4981 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:21,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:21,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:21,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:22,637 INFO L124 PetriNetUnfolderBase]: 4619/8010 cut-off events. [2024-06-14 14:09:22,637 INFO L125 PetriNetUnfolderBase]: For 959853/959853 co-relation queries the response was YES. [2024-06-14 14:09:22,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55080 conditions, 8010 events. 4619/8010 cut-off events. For 959853/959853 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 58535 event pairs, 1398 based on Foata normal form. 6/8015 useless extension candidates. Maximal degree in co-relation 54930. Up to 7143 conditions per place. [2024-06-14 14:09:22,742 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 373 selfloop transitions, 38 changer transitions 0/418 dead transitions. [2024-06-14 14:09:22,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 418 transitions, 5913 flow [2024-06-14 14:09:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-14 14:09:22,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5446428571428571 [2024-06-14 14:09:22,743 INFO L175 Difference]: Start difference. First operand has 309 places, 392 transitions, 4981 flow. Second operand 8 states and 183 transitions. [2024-06-14 14:09:22,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 418 transitions, 5913 flow [2024-06-14 14:09:24,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 418 transitions, 5762 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:24,969 INFO L231 Difference]: Finished difference. Result has 310 places, 392 transitions, 4912 flow [2024-06-14 14:09:24,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4912, PETRI_PLACES=310, PETRI_TRANSITIONS=392} [2024-06-14 14:09:24,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-14 14:09:24,969 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 392 transitions, 4912 flow [2024-06-14 14:09:24,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:24,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:24,969 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] [2024-06-14 14:09:24,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 14:09:24,969 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:24,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:24,970 INFO L85 PathProgramCache]: Analyzing trace with hash -654797896, now seen corresponding path program 1 times [2024-06-14 14:09:24,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:24,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140365860] [2024-06-14 14:09:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:24,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:25,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:25,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140365860] [2024-06-14 14:09:25,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140365860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:25,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:25,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:25,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352132473] [2024-06-14 14:09:25,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:25,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:25,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:25,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:25,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:25,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 392 transitions, 4912 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:25,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:25,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:25,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:26,492 INFO L124 PetriNetUnfolderBase]: 4660/8061 cut-off events. [2024-06-14 14:09:26,492 INFO L125 PetriNetUnfolderBase]: For 987938/987938 co-relation queries the response was YES. [2024-06-14 14:09:26,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56004 conditions, 8061 events. 4660/8061 cut-off events. For 987938/987938 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 58836 event pairs, 1468 based on Foata normal form. 2/8054 useless extension candidates. Maximal degree in co-relation 55855. Up to 7109 conditions per place. [2024-06-14 14:09:26,592 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 326 selfloop transitions, 93 changer transitions 1/427 dead transitions. [2024-06-14 14:09:26,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 427 transitions, 6230 flow [2024-06-14 14:09:26,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:26,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:09:26,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-14 14:09:26,593 INFO L175 Difference]: Start difference. First operand has 310 places, 392 transitions, 4912 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:09:26,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 427 transitions, 6230 flow [2024-06-14 14:09:29,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 427 transitions, 6134 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:29,079 INFO L231 Difference]: Finished difference. Result has 312 places, 396 transitions, 5172 flow [2024-06-14 14:09:29,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4816, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5172, PETRI_PLACES=312, PETRI_TRANSITIONS=396} [2024-06-14 14:09:29,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-14 14:09:29,080 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 396 transitions, 5172 flow [2024-06-14 14:09:29,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:29,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:29,080 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] [2024-06-14 14:09:29,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 14:09:29,081 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:29,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:29,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1790416350, now seen corresponding path program 2 times [2024-06-14 14:09:29,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:29,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181366058] [2024-06-14 14:09:29,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:29,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:29,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:29,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181366058] [2024-06-14 14:09:29,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181366058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:29,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:29,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:29,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332533979] [2024-06-14 14:09:29,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:29,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:29,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:29,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:29,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:29,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:29,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 396 transitions, 5172 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:29,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:29,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:29,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:30,599 INFO L124 PetriNetUnfolderBase]: 4648/8057 cut-off events. [2024-06-14 14:09:30,599 INFO L125 PetriNetUnfolderBase]: For 996018/996018 co-relation queries the response was YES. [2024-06-14 14:09:30,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56139 conditions, 8057 events. 4648/8057 cut-off events. For 996018/996018 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 58857 event pairs, 1488 based on Foata normal form. 2/8055 useless extension candidates. Maximal degree in co-relation 55988. Up to 7194 conditions per place. [2024-06-14 14:09:30,706 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 321 selfloop transitions, 90 changer transitions 0/418 dead transitions. [2024-06-14 14:09:30,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 418 transitions, 6048 flow [2024-06-14 14:09:30,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:30,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 14:09:30,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-14 14:09:30,708 INFO L175 Difference]: Start difference. First operand has 312 places, 396 transitions, 5172 flow. Second operand 8 states and 190 transitions. [2024-06-14 14:09:30,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 418 transitions, 6048 flow [2024-06-14 14:09:33,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 418 transitions, 5852 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:33,252 INFO L231 Difference]: Finished difference. Result has 316 places, 396 transitions, 5161 flow [2024-06-14 14:09:33,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4976, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5161, PETRI_PLACES=316, PETRI_TRANSITIONS=396} [2024-06-14 14:09:33,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-14 14:09:33,252 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 396 transitions, 5161 flow [2024-06-14 14:09:33,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:33,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:33,252 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] [2024-06-14 14:09:33,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 14:09:33,252 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:33,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:33,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1180451288, now seen corresponding path program 3 times [2024-06-14 14:09:33,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:33,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060058274] [2024-06-14 14:09:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:33,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:33,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:33,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060058274] [2024-06-14 14:09:33,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060058274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:33,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:33,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:33,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785040950] [2024-06-14 14:09:33,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:33,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:33,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:33,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:33,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:33,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:33,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 396 transitions, 5161 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:33,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:33,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:33,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:34,873 INFO L124 PetriNetUnfolderBase]: 4774/8256 cut-off events. [2024-06-14 14:09:34,873 INFO L125 PetriNetUnfolderBase]: For 1125958/1125958 co-relation queries the response was YES. [2024-06-14 14:09:34,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59981 conditions, 8256 events. 4774/8256 cut-off events. For 1125958/1125958 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 60447 event pairs, 1495 based on Foata normal form. 2/8250 useless extension candidates. Maximal degree in co-relation 59828. Up to 7293 conditions per place. [2024-06-14 14:09:34,984 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 368 selfloop transitions, 55 changer transitions 0/430 dead transitions. [2024-06-14 14:09:34,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 430 transitions, 6502 flow [2024-06-14 14:09:34,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:34,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 14:09:34,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-14 14:09:34,985 INFO L175 Difference]: Start difference. First operand has 316 places, 396 transitions, 5161 flow. Second operand 8 states and 190 transitions. [2024-06-14 14:09:34,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 430 transitions, 6502 flow [2024-06-14 14:09:38,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 430 transitions, 6279 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:38,071 INFO L231 Difference]: Finished difference. Result has 319 places, 401 transitions, 5229 flow [2024-06-14 14:09:38,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4938, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5229, PETRI_PLACES=319, PETRI_TRANSITIONS=401} [2024-06-14 14:09:38,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 276 predicate places. [2024-06-14 14:09:38,072 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 401 transitions, 5229 flow [2024-06-14 14:09:38,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:38,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:38,072 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] [2024-06-14 14:09:38,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 14:09:38,072 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:38,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:38,073 INFO L85 PathProgramCache]: Analyzing trace with hash 141814018, now seen corresponding path program 4 times [2024-06-14 14:09:38,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:38,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719830593] [2024-06-14 14:09:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:38,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:38,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:38,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:38,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:38,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719830593] [2024-06-14 14:09:38,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719830593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:38,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:38,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:38,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060031268] [2024-06-14 14:09:38,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:38,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:38,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:38,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:38,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:38,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:38,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 401 transitions, 5229 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:38,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:38,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:38,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:39,753 INFO L124 PetriNetUnfolderBase]: 4782/8291 cut-off events. [2024-06-14 14:09:39,754 INFO L125 PetriNetUnfolderBase]: For 1147395/1147395 co-relation queries the response was YES. [2024-06-14 14:09:39,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60503 conditions, 8291 events. 4782/8291 cut-off events. For 1147395/1147395 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 60910 event pairs, 1526 based on Foata normal form. 2/8290 useless extension candidates. Maximal degree in co-relation 60348. Up to 7396 conditions per place. [2024-06-14 14:09:39,854 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 87 changer transitions 0/432 dead transitions. [2024-06-14 14:09:39,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 432 transitions, 6223 flow [2024-06-14 14:09:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-14 14:09:39,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-14 14:09:39,855 INFO L175 Difference]: Start difference. First operand has 319 places, 401 transitions, 5229 flow. Second operand 9 states and 214 transitions. [2024-06-14 14:09:39,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 432 transitions, 6223 flow [2024-06-14 14:09:42,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 432 transitions, 6113 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 14:09:42,589 INFO L231 Difference]: Finished difference. Result has 325 places, 403 transitions, 5374 flow [2024-06-14 14:09:42,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5127, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5374, PETRI_PLACES=325, PETRI_TRANSITIONS=403} [2024-06-14 14:09:42,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-14 14:09:42,590 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 403 transitions, 5374 flow [2024-06-14 14:09:42,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:42,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:42,590 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] [2024-06-14 14:09:42,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 14:09:42,590 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:42,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:42,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1333343512, now seen corresponding path program 5 times [2024-06-14 14:09:42,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:42,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779653589] [2024-06-14 14:09:42,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:42,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:42,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:42,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779653589] [2024-06-14 14:09:42,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779653589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:42,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:42,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:42,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627446183] [2024-06-14 14:09:42,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:42,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:42,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:42,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:42,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:42,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:42,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 403 transitions, 5374 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:42,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:42,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:42,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:44,243 INFO L124 PetriNetUnfolderBase]: 4882/8481 cut-off events. [2024-06-14 14:09:44,243 INFO L125 PetriNetUnfolderBase]: For 1261659/1261659 co-relation queries the response was YES. [2024-06-14 14:09:44,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63796 conditions, 8481 events. 4882/8481 cut-off events. For 1261659/1261659 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62613 event pairs, 1308 based on Foata normal form. 2/8482 useless extension candidates. Maximal degree in co-relation 63640. Up to 6100 conditions per place. [2024-06-14 14:09:44,353 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 322 selfloop transitions, 123 changer transitions 0/452 dead transitions. [2024-06-14 14:09:44,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 452 transitions, 7038 flow [2024-06-14 14:09:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:44,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-14 14:09:44,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-14 14:09:44,354 INFO L175 Difference]: Start difference. First operand has 325 places, 403 transitions, 5374 flow. Second operand 9 states and 226 transitions. [2024-06-14 14:09:44,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 452 transitions, 7038 flow [2024-06-14 14:09:47,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 452 transitions, 6821 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:47,142 INFO L231 Difference]: Finished difference. Result has 327 places, 407 transitions, 5535 flow [2024-06-14 14:09:47,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5157, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5535, PETRI_PLACES=327, PETRI_TRANSITIONS=407} [2024-06-14 14:09:47,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-14 14:09:47,142 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 407 transitions, 5535 flow [2024-06-14 14:09:47,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:47,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:47,142 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] [2024-06-14 14:09:47,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 14:09:47,142 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:47,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:47,143 INFO L85 PathProgramCache]: Analyzing trace with hash 663161784, now seen corresponding path program 6 times [2024-06-14 14:09:47,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:47,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194909627] [2024-06-14 14:09:47,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:47,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:47,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:47,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:47,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194909627] [2024-06-14 14:09:47,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194909627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:47,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:47,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:47,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47787433] [2024-06-14 14:09:47,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:47,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:47,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:47,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:47,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:47,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:47,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 407 transitions, 5535 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:47,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:47,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:47,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:48,807 INFO L124 PetriNetUnfolderBase]: 4877/8456 cut-off events. [2024-06-14 14:09:48,807 INFO L125 PetriNetUnfolderBase]: For 1301358/1301358 co-relation queries the response was YES. [2024-06-14 14:09:48,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64191 conditions, 8456 events. 4877/8456 cut-off events. For 1301358/1301358 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62234 event pairs, 1363 based on Foata normal form. 8/8463 useless extension candidates. Maximal degree in co-relation 64034. Up to 6098 conditions per place. [2024-06-14 14:09:48,918 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 325 selfloop transitions, 117 changer transitions 0/449 dead transitions. [2024-06-14 14:09:48,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 449 transitions, 7037 flow [2024-06-14 14:09:48,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:48,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:48,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-14 14:09:48,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-06-14 14:09:48,919 INFO L175 Difference]: Start difference. First operand has 327 places, 407 transitions, 5535 flow. Second operand 9 states and 223 transitions. [2024-06-14 14:09:48,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 449 transitions, 7037 flow [2024-06-14 14:09:52,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 449 transitions, 6807 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:52,325 INFO L231 Difference]: Finished difference. Result has 330 places, 408 transitions, 5579 flow [2024-06-14 14:09:52,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5305, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5579, PETRI_PLACES=330, PETRI_TRANSITIONS=408} [2024-06-14 14:09:52,325 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-14 14:09:52,325 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 408 transitions, 5579 flow [2024-06-14 14:09:52,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:52,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:52,326 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] [2024-06-14 14:09:52,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 14:09:52,326 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:52,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:52,326 INFO L85 PathProgramCache]: Analyzing trace with hash -895790152, now seen corresponding path program 7 times [2024-06-14 14:09:52,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:52,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63242017] [2024-06-14 14:09:52,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:52,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:52,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:52,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63242017] [2024-06-14 14:09:52,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63242017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:52,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:52,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:52,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385561852] [2024-06-14 14:09:52,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:52,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:52,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:52,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:52,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:52,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:52,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 408 transitions, 5579 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:52,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:52,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:52,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:53,986 INFO L124 PetriNetUnfolderBase]: 4849/8418 cut-off events. [2024-06-14 14:09:53,986 INFO L125 PetriNetUnfolderBase]: For 1277501/1277501 co-relation queries the response was YES. [2024-06-14 14:09:54,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62904 conditions, 8418 events. 4849/8418 cut-off events. For 1277501/1277501 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 62050 event pairs, 1555 based on Foata normal form. 12/8429 useless extension candidates. Maximal degree in co-relation 62747. Up to 7463 conditions per place. [2024-06-14 14:09:54,282 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 341 selfloop transitions, 91 changer transitions 0/439 dead transitions. [2024-06-14 14:09:54,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 439 transitions, 6548 flow [2024-06-14 14:09:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:54,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:54,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-14 14:09:54,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 14:09:54,283 INFO L175 Difference]: Start difference. First operand has 330 places, 408 transitions, 5579 flow. Second operand 10 states and 235 transitions. [2024-06-14 14:09:54,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 439 transitions, 6548 flow [2024-06-14 14:09:57,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 439 transitions, 6371 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:57,067 INFO L231 Difference]: Finished difference. Result has 334 places, 409 transitions, 5614 flow [2024-06-14 14:09:57,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5402, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5614, PETRI_PLACES=334, PETRI_TRANSITIONS=409} [2024-06-14 14:09:57,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-14 14:09:57,068 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 409 transitions, 5614 flow [2024-06-14 14:09:57,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:57,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:57,068 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] [2024-06-14 14:09:57,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 14:09:57,068 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:57,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:57,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1395241396, now seen corresponding path program 8 times [2024-06-14 14:09:57,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:57,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528349346] [2024-06-14 14:09:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:57,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:57,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:57,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528349346] [2024-06-14 14:09:57,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528349346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:57,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:57,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:09:57,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226291165] [2024-06-14 14:09:57,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:57,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:09:57,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:57,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:09:57,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:09:57,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:09:57,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 409 transitions, 5614 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:57,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:57,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:09:57,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:58,715 INFO L124 PetriNetUnfolderBase]: 4814/8355 cut-off events. [2024-06-14 14:09:58,715 INFO L125 PetriNetUnfolderBase]: For 1229905/1229905 co-relation queries the response was YES. [2024-06-14 14:09:58,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60997 conditions, 8355 events. 4814/8355 cut-off events. For 1229905/1229905 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 61470 event pairs, 1512 based on Foata normal form. 12/8366 useless extension candidates. Maximal degree in co-relation 60839. Up to 7126 conditions per place. [2024-06-14 14:09:58,827 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 101 changer transitions 0/443 dead transitions. [2024-06-14 14:09:58,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 443 transitions, 6590 flow [2024-06-14 14:09:58,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:58,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:58,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-14 14:09:58,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 14:09:58,828 INFO L175 Difference]: Start difference. First operand has 334 places, 409 transitions, 5614 flow. Second operand 10 states and 238 transitions. [2024-06-14 14:09:58,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 443 transitions, 6590 flow [2024-06-14 14:10:02,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 443 transitions, 6305 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:02,125 INFO L231 Difference]: Finished difference. Result has 336 places, 409 transitions, 5539 flow [2024-06-14 14:10:02,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5329, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5539, PETRI_PLACES=336, PETRI_TRANSITIONS=409} [2024-06-14 14:10:02,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-14 14:10:02,125 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 409 transitions, 5539 flow [2024-06-14 14:10:02,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:02,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:02,125 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] [2024-06-14 14:10:02,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 14:10:02,126 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:02,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:02,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1435275574, now seen corresponding path program 1 times [2024-06-14 14:10:02,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:02,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852528523] [2024-06-14 14:10:02,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:02,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:02,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:02,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852528523] [2024-06-14 14:10:02,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852528523] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:02,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:02,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:10:02,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129507501] [2024-06-14 14:10:02,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:02,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:10:02,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:02,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:10:02,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:10:02,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:02,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 409 transitions, 5539 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:02,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:02,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:02,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:03,777 INFO L124 PetriNetUnfolderBase]: 4804/8348 cut-off events. [2024-06-14 14:10:03,777 INFO L125 PetriNetUnfolderBase]: For 1180009/1180009 co-relation queries the response was YES. [2024-06-14 14:10:03,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60359 conditions, 8348 events. 4804/8348 cut-off events. For 1180009/1180009 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61562 event pairs, 1544 based on Foata normal form. 4/8350 useless extension candidates. Maximal degree in co-relation 60200. Up to 7428 conditions per place. [2024-06-14 14:10:03,887 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 327 selfloop transitions, 99 changer transitions 0/433 dead transitions. [2024-06-14 14:10:03,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 433 transitions, 6547 flow [2024-06-14 14:10:03,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:03,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:03,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-14 14:10:03,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 14:10:03,888 INFO L175 Difference]: Start difference. First operand has 336 places, 409 transitions, 5539 flow. Second operand 10 states and 224 transitions. [2024-06-14 14:10:03,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 433 transitions, 6547 flow [2024-06-14 14:10:06,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 433 transitions, 6321 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 14:10:06,925 INFO L231 Difference]: Finished difference. Result has 337 places, 412 transitions, 5630 flow [2024-06-14 14:10:06,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5630, PETRI_PLACES=337, PETRI_TRANSITIONS=412} [2024-06-14 14:10:06,925 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-14 14:10:06,925 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 412 transitions, 5630 flow [2024-06-14 14:10:06,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:06,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:06,926 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] [2024-06-14 14:10:06,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 14:10:06,926 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:06,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:06,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1620371856, now seen corresponding path program 2 times [2024-06-14 14:10:06,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:06,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159517930] [2024-06-14 14:10:06,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:06,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:07,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:07,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:07,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159517930] [2024-06-14 14:10:07,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159517930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:07,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:07,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:10:07,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493700704] [2024-06-14 14:10:07,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:07,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:10:07,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:10:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:10:07,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:07,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 412 transitions, 5630 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:07,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:07,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:07,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:08,584 INFO L124 PetriNetUnfolderBase]: 4799/8341 cut-off events. [2024-06-14 14:10:08,584 INFO L125 PetriNetUnfolderBase]: For 1176042/1176042 co-relation queries the response was YES. [2024-06-14 14:10:08,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60162 conditions, 8341 events. 4799/8341 cut-off events. For 1176042/1176042 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61541 event pairs, 1541 based on Foata normal form. 2/8341 useless extension candidates. Maximal degree in co-relation 60002. Up to 7427 conditions per place. [2024-06-14 14:10:08,700 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 327 selfloop transitions, 100 changer transitions 0/434 dead transitions. [2024-06-14 14:10:08,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 434 transitions, 6607 flow [2024-06-14 14:10:08,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:08,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 207 transitions. [2024-06-14 14:10:08,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:10:08,701 INFO L175 Difference]: Start difference. First operand has 337 places, 412 transitions, 5630 flow. Second operand 9 states and 207 transitions. [2024-06-14 14:10:08,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 434 transitions, 6607 flow [2024-06-14 14:10:11,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 434 transitions, 6326 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:11,539 INFO L231 Difference]: Finished difference. Result has 338 places, 414 transitions, 5633 flow [2024-06-14 14:10:11,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5633, PETRI_PLACES=338, PETRI_TRANSITIONS=414} [2024-06-14 14:10:11,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-14 14:10:11,540 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 414 transitions, 5633 flow [2024-06-14 14:10:11,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:11,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:11,540 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] [2024-06-14 14:10:11,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 14:10:11,541 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:11,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:11,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1317689678, now seen corresponding path program 3 times [2024-06-14 14:10:11,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:11,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260537680] [2024-06-14 14:10:11,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:11,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:11,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:11,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260537680] [2024-06-14 14:10:11,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260537680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:11,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:11,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:10:11,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136036633] [2024-06-14 14:10:11,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:11,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:10:11,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:11,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:10:11,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:10:11,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:11,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 414 transitions, 5633 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:11,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:11,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:11,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:13,176 INFO L124 PetriNetUnfolderBase]: 4789/8321 cut-off events. [2024-06-14 14:10:13,177 INFO L125 PetriNetUnfolderBase]: For 1184251/1184251 co-relation queries the response was YES. [2024-06-14 14:10:13,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59543 conditions, 8321 events. 4789/8321 cut-off events. For 1184251/1184251 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61309 event pairs, 1529 based on Foata normal form. 4/8323 useless extension candidates. Maximal degree in co-relation 59382. Up to 7355 conditions per place. [2024-06-14 14:10:13,292 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 324 selfloop transitions, 108 changer transitions 0/439 dead transitions. [2024-06-14 14:10:13,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 439 transitions, 6654 flow [2024-06-14 14:10:13,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:13,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:13,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-14 14:10:13,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-14 14:10:13,293 INFO L175 Difference]: Start difference. First operand has 338 places, 414 transitions, 5633 flow. Second operand 10 states and 224 transitions. [2024-06-14 14:10:13,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 439 transitions, 6654 flow [2024-06-14 14:10:16,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 439 transitions, 6389 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:16,246 INFO L231 Difference]: Finished difference. Result has 341 places, 417 transitions, 5702 flow [2024-06-14 14:10:16,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5702, PETRI_PLACES=341, PETRI_TRANSITIONS=417} [2024-06-14 14:10:16,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-14 14:10:16,247 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 417 transitions, 5702 flow [2024-06-14 14:10:16,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:16,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:16,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:16,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 14:10:16,247 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:16,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:16,247 INFO L85 PathProgramCache]: Analyzing trace with hash 838531298, now seen corresponding path program 4 times [2024-06-14 14:10:16,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:16,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320771796] [2024-06-14 14:10:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:16,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:16,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:16,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320771796] [2024-06-14 14:10:16,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320771796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:16,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:16,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:10:16,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693087188] [2024-06-14 14:10:16,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:16,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:10:16,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:16,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:10:16,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:10:16,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:16,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 417 transitions, 5702 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:16,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:16,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:16,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:17,941 INFO L124 PetriNetUnfolderBase]: 4797/8323 cut-off events. [2024-06-14 14:10:17,941 INFO L125 PetriNetUnfolderBase]: For 1193423/1193423 co-relation queries the response was YES. [2024-06-14 14:10:18,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59874 conditions, 8323 events. 4797/8323 cut-off events. For 1193423/1193423 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61227 event pairs, 1521 based on Foata normal form. 2/8323 useless extension candidates. Maximal degree in co-relation 59712. Up to 7355 conditions per place. [2024-06-14 14:10:18,046 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 109 changer transitions 0/445 dead transitions. [2024-06-14 14:10:18,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 445 transitions, 6756 flow [2024-06-14 14:10:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 14:10:18,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-14 14:10:18,046 INFO L175 Difference]: Start difference. First operand has 341 places, 417 transitions, 5702 flow. Second operand 9 states and 211 transitions. [2024-06-14 14:10:18,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 445 transitions, 6756 flow [2024-06-14 14:10:20,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 445 transitions, 6453 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:20,954 INFO L231 Difference]: Finished difference. Result has 343 places, 421 transitions, 5754 flow [2024-06-14 14:10:20,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5399, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5754, PETRI_PLACES=343, PETRI_TRANSITIONS=421} [2024-06-14 14:10:20,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-14 14:10:20,955 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 421 transitions, 5754 flow [2024-06-14 14:10:20,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:20,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:20,955 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] [2024-06-14 14:10:20,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 14:10:20,955 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:20,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:20,956 INFO L85 PathProgramCache]: Analyzing trace with hash 152598546, now seen corresponding path program 5 times [2024-06-14 14:10:20,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:20,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795896020] [2024-06-14 14:10:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:20,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:21,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:21,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795896020] [2024-06-14 14:10:21,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795896020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:21,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:21,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:10:21,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842763004] [2024-06-14 14:10:21,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:21,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:10:21,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:21,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:10:21,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:10:21,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:21,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 421 transitions, 5754 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:21,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:21,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:21,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:22,661 INFO L124 PetriNetUnfolderBase]: 4805/8353 cut-off events. [2024-06-14 14:10:22,661 INFO L125 PetriNetUnfolderBase]: For 1215616/1215616 co-relation queries the response was YES. [2024-06-14 14:10:22,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60098 conditions, 8353 events. 4805/8353 cut-off events. For 1215616/1215616 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61833 event pairs, 1404 based on Foata normal form. 2/8353 useless extension candidates. Maximal degree in co-relation 59934. Up to 6982 conditions per place. [2024-06-14 14:10:22,781 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 132 changer transitions 0/455 dead transitions. [2024-06-14 14:10:22,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 455 transitions, 7130 flow [2024-06-14 14:10:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:22,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:22,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-14 14:10:22,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-14 14:10:22,782 INFO L175 Difference]: Start difference. First operand has 343 places, 421 transitions, 5754 flow. Second operand 9 states and 215 transitions. [2024-06-14 14:10:22,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 455 transitions, 7130 flow [2024-06-14 14:10:25,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 455 transitions, 6896 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:25,996 INFO L231 Difference]: Finished difference. Result has 348 places, 426 transitions, 5975 flow [2024-06-14 14:10:25,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5520, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5975, PETRI_PLACES=348, PETRI_TRANSITIONS=426} [2024-06-14 14:10:25,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-14 14:10:25,997 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 426 transitions, 5975 flow [2024-06-14 14:10:25,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:25,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:25,997 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] [2024-06-14 14:10:25,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 14:10:25,997 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:25,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:25,998 INFO L85 PathProgramCache]: Analyzing trace with hash 152835696, now seen corresponding path program 6 times [2024-06-14 14:10:25,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:25,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129409865] [2024-06-14 14:10:25,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:25,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:26,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:26,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:26,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129409865] [2024-06-14 14:10:26,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129409865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:26,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:26,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:10:26,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014730048] [2024-06-14 14:10:26,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:26,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:10:26,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:26,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:10:26,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:10:26,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:26,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 426 transitions, 5975 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:26,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:26,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:26,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:27,632 INFO L124 PetriNetUnfolderBase]: 4800/8344 cut-off events. [2024-06-14 14:10:27,632 INFO L125 PetriNetUnfolderBase]: For 1225775/1225775 co-relation queries the response was YES. [2024-06-14 14:10:27,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60384 conditions, 8344 events. 4800/8344 cut-off events. For 1225775/1225775 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 61670 event pairs, 1432 based on Foata normal form. 2/8344 useless extension candidates. Maximal degree in co-relation 60217. Up to 6978 conditions per place. [2024-06-14 14:10:27,748 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 317 selfloop transitions, 128 changer transitions 0/452 dead transitions. [2024-06-14 14:10:27,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 452 transitions, 6966 flow [2024-06-14 14:10:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:27,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:27,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 14:10:27,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 14:10:27,749 INFO L175 Difference]: Start difference. First operand has 348 places, 426 transitions, 5975 flow. Second operand 9 states and 210 transitions. [2024-06-14 14:10:27,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 452 transitions, 6966 flow [2024-06-14 14:10:31,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 452 transitions, 6507 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-06-14 14:10:31,318 INFO L231 Difference]: Finished difference. Result has 348 places, 427 transitions, 5808 flow [2024-06-14 14:10:31,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5808, PETRI_PLACES=348, PETRI_TRANSITIONS=427} [2024-06-14 14:10:31,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-14 14:10:31,319 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 427 transitions, 5808 flow [2024-06-14 14:10:31,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:31,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:31,319 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, 1] [2024-06-14 14:10:31,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 14:10:31,319 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:31,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:31,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1368864726, now seen corresponding path program 1 times [2024-06-14 14:10:31,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:31,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179151899] [2024-06-14 14:10:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:31,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:31,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:31,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179151899] [2024-06-14 14:10:31,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179151899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:31,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:31,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:31,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469418455] [2024-06-14 14:10:31,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:31,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:31,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:31,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:31,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:31,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:31,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 427 transitions, 5808 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:31,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:31,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:31,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:33,184 INFO L124 PetriNetUnfolderBase]: 4795/8326 cut-off events. [2024-06-14 14:10:33,184 INFO L125 PetriNetUnfolderBase]: For 1242724/1242724 co-relation queries the response was YES. [2024-06-14 14:10:33,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59446 conditions, 8326 events. 4795/8326 cut-off events. For 1242724/1242724 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 61306 event pairs, 1312 based on Foata normal form. 8/8330 useless extension candidates. Maximal degree in co-relation 59281. Up to 6334 conditions per place. [2024-06-14 14:10:33,281 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 409 selfloop transitions, 65 changer transitions 0/481 dead transitions. [2024-06-14 14:10:33,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 481 transitions, 7427 flow [2024-06-14 14:10:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-14 14:10:33,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5976190476190476 [2024-06-14 14:10:33,282 INFO L175 Difference]: Start difference. First operand has 348 places, 427 transitions, 5808 flow. Second operand 10 states and 251 transitions. [2024-06-14 14:10:33,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 481 transitions, 7427 flow [2024-06-14 14:10:36,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 481 transitions, 7213 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:10:36,250 INFO L231 Difference]: Finished difference. Result has 352 places, 429 transitions, 5771 flow [2024-06-14 14:10:36,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5594, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5771, PETRI_PLACES=352, PETRI_TRANSITIONS=429} [2024-06-14 14:10:36,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-14 14:10:36,250 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 429 transitions, 5771 flow [2024-06-14 14:10:36,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:36,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:36,251 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, 1] [2024-06-14 14:10:36,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 14:10:36,251 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:36,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:36,251 INFO L85 PathProgramCache]: Analyzing trace with hash 276932832, now seen corresponding path program 2 times [2024-06-14 14:10:36,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:36,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76002535] [2024-06-14 14:10:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:36,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:36,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:36,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76002535] [2024-06-14 14:10:36,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76002535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:36,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:36,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:36,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308911587] [2024-06-14 14:10:36,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:36,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:36,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:36,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:36,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:36,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:36,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 429 transitions, 5771 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:36,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:36,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:36,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:38,005 INFO L124 PetriNetUnfolderBase]: 4862/8431 cut-off events. [2024-06-14 14:10:38,005 INFO L125 PetriNetUnfolderBase]: For 1293123/1293123 co-relation queries the response was YES. [2024-06-14 14:10:38,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61392 conditions, 8431 events. 4862/8431 cut-off events. For 1293123/1293123 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 62175 event pairs, 1410 based on Foata normal form. 2/8425 useless extension candidates. Maximal degree in co-relation 61226. Up to 6368 conditions per place. [2024-06-14 14:10:38,122 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 402 selfloop transitions, 69 changer transitions 0/478 dead transitions. [2024-06-14 14:10:38,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 478 transitions, 7408 flow [2024-06-14 14:10:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-14 14:10:38,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-14 14:10:38,123 INFO L175 Difference]: Start difference. First operand has 352 places, 429 transitions, 5771 flow. Second operand 10 states and 244 transitions. [2024-06-14 14:10:38,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 478 transitions, 7408 flow [2024-06-14 14:10:41,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 478 transitions, 7267 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:41,895 INFO L231 Difference]: Finished difference. Result has 356 places, 433 transitions, 5876 flow [2024-06-14 14:10:41,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5876, PETRI_PLACES=356, PETRI_TRANSITIONS=433} [2024-06-14 14:10:41,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-14 14:10:41,895 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 433 transitions, 5876 flow [2024-06-14 14:10:41,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:41,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:41,896 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, 1] [2024-06-14 14:10:41,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 14:10:41,896 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:41,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:41,896 INFO L85 PathProgramCache]: Analyzing trace with hash -180564010, now seen corresponding path program 3 times [2024-06-14 14:10:41,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:41,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920741476] [2024-06-14 14:10:41,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:41,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:42,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:42,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:42,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920741476] [2024-06-14 14:10:42,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920741476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:42,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:42,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:42,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554949170] [2024-06-14 14:10:42,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:42,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:42,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:42,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:42,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 433 transitions, 5876 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:42,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:42,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:42,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:43,657 INFO L124 PetriNetUnfolderBase]: 4839/8397 cut-off events. [2024-06-14 14:10:43,657 INFO L125 PetriNetUnfolderBase]: For 1303533/1303533 co-relation queries the response was YES. [2024-06-14 14:10:43,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60263 conditions, 8397 events. 4839/8397 cut-off events. For 1303533/1303533 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 61963 event pairs, 1505 based on Foata normal form. 10/8404 useless extension candidates. Maximal degree in co-relation 60095. Up to 6894 conditions per place. [2024-06-14 14:10:43,776 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 413 selfloop transitions, 55 changer transitions 0/475 dead transitions. [2024-06-14 14:10:43,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 475 transitions, 7184 flow [2024-06-14 14:10:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:43,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 223 transitions. [2024-06-14 14:10:43,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58994708994709 [2024-06-14 14:10:43,777 INFO L175 Difference]: Start difference. First operand has 356 places, 433 transitions, 5876 flow. Second operand 9 states and 223 transitions. [2024-06-14 14:10:43,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 475 transitions, 7184 flow [2024-06-14 14:10:47,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 475 transitions, 7042 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 14:10:47,994 INFO L231 Difference]: Finished difference. Result has 359 places, 433 transitions, 5851 flow [2024-06-14 14:10:47,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5734, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5851, PETRI_PLACES=359, PETRI_TRANSITIONS=433} [2024-06-14 14:10:47,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-14 14:10:47,994 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 433 transitions, 5851 flow [2024-06-14 14:10:47,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:47,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:47,995 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, 1] [2024-06-14 14:10:47,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 14:10:47,995 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:47,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:47,995 INFO L85 PathProgramCache]: Analyzing trace with hash -171993130, now seen corresponding path program 4 times [2024-06-14 14:10:47,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:47,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670520318] [2024-06-14 14:10:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:47,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:48,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:48,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:48,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670520318] [2024-06-14 14:10:48,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670520318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:48,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:48,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:48,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931357953] [2024-06-14 14:10:48,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:48,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:48,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:48,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:48,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:48,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:48,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 433 transitions, 5851 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:48,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:48,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:48,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:49,888 INFO L124 PetriNetUnfolderBase]: 4829/8394 cut-off events. [2024-06-14 14:10:49,889 INFO L125 PetriNetUnfolderBase]: For 1271783/1271783 co-relation queries the response was YES. [2024-06-14 14:10:49,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59306 conditions, 8394 events. 4829/8394 cut-off events. For 1271783/1271783 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61984 event pairs, 1517 based on Foata normal form. 10/8403 useless extension candidates. Maximal degree in co-relation 59137. Up to 7575 conditions per place. [2024-06-14 14:10:49,989 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 408 selfloop transitions, 52 changer transitions 0/467 dead transitions. [2024-06-14 14:10:49,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 467 transitions, 6912 flow [2024-06-14 14:10:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-14 14:10:49,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-14 14:10:49,990 INFO L175 Difference]: Start difference. First operand has 359 places, 433 transitions, 5851 flow. Second operand 9 states and 214 transitions. [2024-06-14 14:10:49,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 467 transitions, 6912 flow [2024-06-14 14:10:53,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 467 transitions, 6810 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:53,911 INFO L231 Difference]: Finished difference. Result has 361 places, 435 transitions, 5910 flow [2024-06-14 14:10:53,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5750, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5910, PETRI_PLACES=361, PETRI_TRANSITIONS=435} [2024-06-14 14:10:53,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-14 14:10:53,911 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 435 transitions, 5910 flow [2024-06-14 14:10:53,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:53,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:53,911 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, 1] [2024-06-14 14:10:53,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 14:10:53,911 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:53,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:53,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1021259734, now seen corresponding path program 5 times [2024-06-14 14:10:53,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:53,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294999219] [2024-06-14 14:10:53,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:53,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:54,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:54,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294999219] [2024-06-14 14:10:54,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294999219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:54,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:54,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:10:54,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932327990] [2024-06-14 14:10:54,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:54,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:10:54,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:54,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:10:54,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:10:54,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:10:54,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 435 transitions, 5910 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:54,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:54,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:10:54,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:55,699 INFO L124 PetriNetUnfolderBase]: 4850/8422 cut-off events. [2024-06-14 14:10:55,699 INFO L125 PetriNetUnfolderBase]: For 1251025/1251025 co-relation queries the response was YES. [2024-06-14 14:10:55,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59985 conditions, 8422 events. 4850/8422 cut-off events. For 1251025/1251025 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 62147 event pairs, 1515 based on Foata normal form. 2/8421 useless extension candidates. Maximal degree in co-relation 59815. Up to 7583 conditions per place. [2024-06-14 14:10:55,818 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 408 selfloop transitions, 60 changer transitions 0/475 dead transitions. [2024-06-14 14:10:55,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 475 transitions, 7281 flow [2024-06-14 14:10:55,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:10:55,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:10:55,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-14 14:10:55,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:10:55,819 INFO L175 Difference]: Start difference. First operand has 361 places, 435 transitions, 5910 flow. Second operand 11 states and 252 transitions. [2024-06-14 14:10:55,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 475 transitions, 7281 flow [2024-06-14 14:11:00,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 475 transitions, 7159 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 14:11:00,812 INFO L231 Difference]: Finished difference. Result has 366 places, 439 transitions, 6026 flow [2024-06-14 14:11:00,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5788, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6026, PETRI_PLACES=366, PETRI_TRANSITIONS=439} [2024-06-14 14:11:00,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-14 14:11:00,813 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 439 transitions, 6026 flow [2024-06-14 14:11:00,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:00,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:00,813 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, 1] [2024-06-14 14:11:00,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 14:11:00,813 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:00,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:00,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1024116694, now seen corresponding path program 6 times [2024-06-14 14:11:00,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:00,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575994984] [2024-06-14 14:11:00,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:00,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:00,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:01,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:01,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575994984] [2024-06-14 14:11:01,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575994984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:01,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:01,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:01,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381435722] [2024-06-14 14:11:01,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:01,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:01,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:01,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:01,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:01,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:01,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 439 transitions, 6026 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:01,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:01,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:01,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:02,585 INFO L124 PetriNetUnfolderBase]: 4845/8418 cut-off events. [2024-06-14 14:11:02,586 INFO L125 PetriNetUnfolderBase]: For 1256551/1256551 co-relation queries the response was YES. [2024-06-14 14:11:02,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59872 conditions, 8418 events. 4845/8418 cut-off events. For 1256551/1256551 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 62161 event pairs, 1519 based on Foata normal form. 2/8419 useless extension candidates. Maximal degree in co-relation 59700. Up to 7631 conditions per place. [2024-06-14 14:11:02,710 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 409 selfloop transitions, 54 changer transitions 0/470 dead transitions. [2024-06-14 14:11:02,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 470 transitions, 7028 flow [2024-06-14 14:11:02,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:02,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-14 14:11:02,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-14 14:11:02,711 INFO L175 Difference]: Start difference. First operand has 366 places, 439 transitions, 6026 flow. Second operand 11 states and 247 transitions. [2024-06-14 14:11:02,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 470 transitions, 7028 flow [2024-06-14 14:11:07,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 470 transitions, 6867 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-14 14:11:07,964 INFO L231 Difference]: Finished difference. Result has 369 places, 439 transitions, 5978 flow [2024-06-14 14:11:07,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5865, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5978, PETRI_PLACES=369, PETRI_TRANSITIONS=439} [2024-06-14 14:11:07,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-14 14:11:07,965 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 439 transitions, 5978 flow [2024-06-14 14:11:07,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:07,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:07,965 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, 1] [2024-06-14 14:11:07,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 14:11:07,965 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:07,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:07,965 INFO L85 PathProgramCache]: Analyzing trace with hash -171988015, now seen corresponding path program 1 times [2024-06-14 14:11:07,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:07,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128802264] [2024-06-14 14:11:07,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:07,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:08,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:08,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128802264] [2024-06-14 14:11:08,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128802264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:08,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:08,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:11:08,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489553597] [2024-06-14 14:11:08,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:08,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:11:08,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:08,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:11:08,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:11:08,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:08,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 439 transitions, 5978 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:08,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:08,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:08,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:09,749 INFO L124 PetriNetUnfolderBase]: 4850/8427 cut-off events. [2024-06-14 14:11:09,750 INFO L125 PetriNetUnfolderBase]: For 1268779/1268779 co-relation queries the response was YES. [2024-06-14 14:11:09,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59961 conditions, 8427 events. 4850/8427 cut-off events. For 1268779/1268779 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 62264 event pairs, 1519 based on Foata normal form. 1/8427 useless extension candidates. Maximal degree in co-relation 59788. Up to 7403 conditions per place. [2024-06-14 14:11:09,857 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 130 changer transitions 0/466 dead transitions. [2024-06-14 14:11:09,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 466 transitions, 7242 flow [2024-06-14 14:11:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:09,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:11:09,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-14 14:11:09,858 INFO L175 Difference]: Start difference. First operand has 369 places, 439 transitions, 5978 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:11:09,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 466 transitions, 7242 flow [2024-06-14 14:11:14,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 466 transitions, 7113 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:14,675 INFO L231 Difference]: Finished difference. Result has 366 places, 442 transitions, 6168 flow [2024-06-14 14:11:14,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6168, PETRI_PLACES=366, PETRI_TRANSITIONS=442} [2024-06-14 14:11:14,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-14 14:11:14,676 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 442 transitions, 6168 flow [2024-06-14 14:11:14,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:14,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:14,676 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, 1] [2024-06-14 14:11:14,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 14:11:14,676 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:14,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:14,677 INFO L85 PathProgramCache]: Analyzing trace with hash -171982435, now seen corresponding path program 2 times [2024-06-14 14:11:14,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:14,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442619476] [2024-06-14 14:11:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:14,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:14,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:14,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442619476] [2024-06-14 14:11:14,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442619476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:14,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:14,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:11:14,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928798093] [2024-06-14 14:11:14,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:14,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:11:14,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:14,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:11:14,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:11:14,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:14,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 442 transitions, 6168 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:14,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:14,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:14,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:16,388 INFO L124 PetriNetUnfolderBase]: 4855/8436 cut-off events. [2024-06-14 14:11:16,388 INFO L125 PetriNetUnfolderBase]: For 1290048/1290048 co-relation queries the response was YES. [2024-06-14 14:11:16,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60428 conditions, 8436 events. 4855/8436 cut-off events. For 1290048/1290048 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62336 event pairs, 1519 based on Foata normal form. 1/8436 useless extension candidates. Maximal degree in co-relation 60254. Up to 7409 conditions per place. [2024-06-14 14:11:16,508 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 124 changer transitions 0/466 dead transitions. [2024-06-14 14:11:16,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 466 transitions, 7432 flow [2024-06-14 14:11:16,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:11:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:11:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:11:16,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-14 14:11:16,509 INFO L175 Difference]: Start difference. First operand has 366 places, 442 transitions, 6168 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:11:16,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 466 transitions, 7432 flow [2024-06-14 14:11:21,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 466 transitions, 7145 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 14:11:21,479 INFO L231 Difference]: Finished difference. Result has 367 places, 445 transitions, 6198 flow [2024-06-14 14:11:21,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5889, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6198, PETRI_PLACES=367, PETRI_TRANSITIONS=445} [2024-06-14 14:11:21,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-14 14:11:21,479 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 445 transitions, 6198 flow [2024-06-14 14:11:21,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:21,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:21,480 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, 1] [2024-06-14 14:11:21,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 14:11:21,480 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:21,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:21,480 INFO L85 PathProgramCache]: Analyzing trace with hash -60602585, now seen corresponding path program 3 times [2024-06-14 14:11:21,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:21,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787337859] [2024-06-14 14:11:21,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:21,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:21,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:21,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787337859] [2024-06-14 14:11:21,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787337859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:21,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:21,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:11:21,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625326714] [2024-06-14 14:11:21,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:21,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:11:21,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:21,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:11:21,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:11:21,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:21,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 445 transitions, 6198 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:21,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:21,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:21,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:23,217 INFO L124 PetriNetUnfolderBase]: 4852/8432 cut-off events. [2024-06-14 14:11:23,217 INFO L125 PetriNetUnfolderBase]: For 1282406/1282406 co-relation queries the response was YES. [2024-06-14 14:11:23,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60264 conditions, 8432 events. 4852/8432 cut-off events. For 1282406/1282406 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62327 event pairs, 1519 based on Foata normal form. 1/8432 useless extension candidates. Maximal degree in co-relation 60090. Up to 7406 conditions per place. [2024-06-14 14:11:23,343 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 333 selfloop transitions, 127 changer transitions 0/467 dead transitions. [2024-06-14 14:11:23,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 467 transitions, 7172 flow [2024-06-14 14:11:23,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:11:23,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:11:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 14:11:23,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582010582010583 [2024-06-14 14:11:23,345 INFO L175 Difference]: Start difference. First operand has 367 places, 445 transitions, 6198 flow. Second operand 9 states and 211 transitions. [2024-06-14 14:11:23,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 467 transitions, 7172 flow [2024-06-14 14:11:28,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 467 transitions, 6985 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 14:11:28,498 INFO L231 Difference]: Finished difference. Result has 371 places, 445 transitions, 6275 flow [2024-06-14 14:11:28,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6011, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6275, PETRI_PLACES=371, PETRI_TRANSITIONS=445} [2024-06-14 14:11:28,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-14 14:11:28,499 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 445 transitions, 6275 flow [2024-06-14 14:11:28,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:28,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:28,499 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, 1] [2024-06-14 14:11:28,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 14:11:28,499 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:28,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:28,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1881563138, now seen corresponding path program 7 times [2024-06-14 14:11:28,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:28,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748590194] [2024-06-14 14:11:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:28,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:28,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:28,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748590194] [2024-06-14 14:11:28,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748590194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:28,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:28,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:28,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538150892] [2024-06-14 14:11:28,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:28,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:28,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:28,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:28,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:28,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:28,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 445 transitions, 6275 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:28,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:28,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:28,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:30,318 INFO L124 PetriNetUnfolderBase]: 4888/8474 cut-off events. [2024-06-14 14:11:30,318 INFO L125 PetriNetUnfolderBase]: For 1352409/1352409 co-relation queries the response was YES. [2024-06-14 14:11:30,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60711 conditions, 8474 events. 4888/8474 cut-off events. For 1352409/1352409 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 62498 event pairs, 1517 based on Foata normal form. 10/8482 useless extension candidates. Maximal degree in co-relation 60537. Up to 6219 conditions per place. [2024-06-14 14:11:30,441 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 177 changer transitions 0/487 dead transitions. [2024-06-14 14:11:30,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 487 transitions, 7896 flow [2024-06-14 14:11:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:11:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:11:30,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-14 14:11:30,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-06-14 14:11:30,442 INFO L175 Difference]: Start difference. First operand has 371 places, 445 transitions, 6275 flow. Second operand 9 states and 230 transitions. [2024-06-14 14:11:30,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 487 transitions, 7896 flow [2024-06-14 14:11:35,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 487 transitions, 7385 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-14 14:11:35,408 INFO L231 Difference]: Finished difference. Result has 368 places, 447 transitions, 6173 flow [2024-06-14 14:11:35,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5768, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6173, PETRI_PLACES=368, PETRI_TRANSITIONS=447} [2024-06-14 14:11:35,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-14 14:11:35,409 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 447 transitions, 6173 flow [2024-06-14 14:11:35,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:35,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:35,409 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, 1] [2024-06-14 14:11:35,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 14:11:35,409 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:35,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:35,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1872992258, now seen corresponding path program 8 times [2024-06-14 14:11:35,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:35,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327387988] [2024-06-14 14:11:35,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:35,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:35,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:35,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:35,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327387988] [2024-06-14 14:11:35,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327387988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:35,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:35,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:35,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812402875] [2024-06-14 14:11:35,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:35,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:35,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:35,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:35,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:35,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:35,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 447 transitions, 6173 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:35,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:35,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:35,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:37,313 INFO L124 PetriNetUnfolderBase]: 4924/8544 cut-off events. [2024-06-14 14:11:37,313 INFO L125 PetriNetUnfolderBase]: For 1355055/1355055 co-relation queries the response was YES. [2024-06-14 14:11:37,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61255 conditions, 8544 events. 4924/8544 cut-off events. For 1355055/1355055 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 63198 event pairs, 1539 based on Foata normal form. 10/8552 useless extension candidates. Maximal degree in co-relation 61082. Up to 7234 conditions per place. [2024-06-14 14:11:37,420 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 299 selfloop transitions, 173 changer transitions 0/479 dead transitions. [2024-06-14 14:11:37,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 479 transitions, 7494 flow [2024-06-14 14:11:37,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:11:37,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:11:37,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-14 14:11:37,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5846560846560847 [2024-06-14 14:11:37,421 INFO L175 Difference]: Start difference. First operand has 368 places, 447 transitions, 6173 flow. Second operand 9 states and 221 transitions. [2024-06-14 14:11:37,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 479 transitions, 7494 flow [2024-06-14 14:11:41,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 479 transitions, 7146 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 14:11:41,764 INFO L231 Difference]: Finished difference. Result has 371 places, 449 transitions, 6226 flow [2024-06-14 14:11:41,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5826, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6226, PETRI_PLACES=371, PETRI_TRANSITIONS=449} [2024-06-14 14:11:41,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-14 14:11:41,765 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 449 transitions, 6226 flow [2024-06-14 14:11:41,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:41,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:41,765 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, 1] [2024-06-14 14:11:41,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 14:11:41,765 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:41,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:41,765 INFO L85 PathProgramCache]: Analyzing trace with hash 696129494, now seen corresponding path program 9 times [2024-06-14 14:11:41,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:41,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678327889] [2024-06-14 14:11:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:41,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:41,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:41,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:41,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678327889] [2024-06-14 14:11:41,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678327889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:41,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:41,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:41,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884696341] [2024-06-14 14:11:41,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:41,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:41,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:41,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:41,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:41,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:41,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 449 transitions, 6226 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:41,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:41,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:41,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:43,546 INFO L124 PetriNetUnfolderBase]: 4914/8530 cut-off events. [2024-06-14 14:11:43,547 INFO L125 PetriNetUnfolderBase]: For 1315707/1315707 co-relation queries the response was YES. [2024-06-14 14:11:43,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60282 conditions, 8530 events. 4914/8530 cut-off events. For 1315707/1315707 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 63105 event pairs, 1531 based on Foata normal form. 10/8538 useless extension candidates. Maximal degree in co-relation 60108. Up to 7220 conditions per place. [2024-06-14 14:11:43,669 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 295 selfloop transitions, 176 changer transitions 0/478 dead transitions. [2024-06-14 14:11:43,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 478 transitions, 7542 flow [2024-06-14 14:11:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:11:43,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:11:43,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 14:11:43,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5740740740740741 [2024-06-14 14:11:43,670 INFO L175 Difference]: Start difference. First operand has 371 places, 449 transitions, 6226 flow. Second operand 9 states and 217 transitions. [2024-06-14 14:11:43,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 478 transitions, 7542 flow [2024-06-14 14:11:48,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 478 transitions, 7178 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 14:11:48,318 INFO L231 Difference]: Finished difference. Result has 373 places, 451 transitions, 6272 flow [2024-06-14 14:11:48,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5862, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6272, PETRI_PLACES=373, PETRI_TRANSITIONS=451} [2024-06-14 14:11:48,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 330 predicate places. [2024-06-14 14:11:48,318 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 451 transitions, 6272 flow [2024-06-14 14:11:48,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:48,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:48,318 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, 1] [2024-06-14 14:11:48,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 14:11:48,318 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:48,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:48,319 INFO L85 PathProgramCache]: Analyzing trace with hash -893564970, now seen corresponding path program 10 times [2024-06-14 14:11:48,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:48,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111977406] [2024-06-14 14:11:48,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:48,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:48,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:48,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:48,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111977406] [2024-06-14 14:11:48,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111977406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:48,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:48,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:48,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468021818] [2024-06-14 14:11:48,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:48,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:48,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:48,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:48,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:48,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:48,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 451 transitions, 6272 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:48,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:48,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:48,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:50,054 INFO L124 PetriNetUnfolderBase]: 4922/8542 cut-off events. [2024-06-14 14:11:50,055 INFO L125 PetriNetUnfolderBase]: For 1274300/1274300 co-relation queries the response was YES. [2024-06-14 14:11:50,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60464 conditions, 8542 events. 4922/8542 cut-off events. For 1274300/1274300 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 63139 event pairs, 1531 based on Foata normal form. 2/8542 useless extension candidates. Maximal degree in co-relation 60289. Up to 7264 conditions per place. [2024-06-14 14:11:50,174 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 279 selfloop transitions, 188 changer transitions 0/474 dead transitions. [2024-06-14 14:11:50,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 474 transitions, 7556 flow [2024-06-14 14:11:50,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:11:50,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:11:50,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 14:11:50,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-14 14:11:50,175 INFO L175 Difference]: Start difference. First operand has 373 places, 451 transitions, 6272 flow. Second operand 9 states and 208 transitions. [2024-06-14 14:11:50,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 474 transitions, 7556 flow [2024-06-14 14:11:54,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 474 transitions, 7182 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 14:11:54,707 INFO L231 Difference]: Finished difference. Result has 375 places, 453 transitions, 6335 flow [2024-06-14 14:11:54,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5898, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6335, PETRI_PLACES=375, PETRI_TRANSITIONS=453} [2024-06-14 14:11:54,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-14 14:11:54,707 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 453 transitions, 6335 flow [2024-06-14 14:11:54,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:54,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:54,708 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, 1] [2024-06-14 14:11:54,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 14:11:54,708 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:54,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:54,708 INFO L85 PathProgramCache]: Analyzing trace with hash -124294402, now seen corresponding path program 11 times [2024-06-14 14:11:54,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:54,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650906709] [2024-06-14 14:11:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:54,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:54,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:54,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:54,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650906709] [2024-06-14 14:11:54,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650906709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:54,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:54,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:11:54,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177014249] [2024-06-14 14:11:54,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:54,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:11:54,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:54,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:11:54,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:11:54,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:11:54,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 453 transitions, 6335 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:54,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:54,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:11:54,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:56,513 INFO L124 PetriNetUnfolderBase]: 4930/8554 cut-off events. [2024-06-14 14:11:56,513 INFO L125 PetriNetUnfolderBase]: For 1293278/1293278 co-relation queries the response was YES. [2024-06-14 14:11:56,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60612 conditions, 8554 events. 4930/8554 cut-off events. For 1293278/1293278 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 63246 event pairs, 1519 based on Foata normal form. 2/8555 useless extension candidates. Maximal degree in co-relation 60436. Up to 7808 conditions per place. [2024-06-14 14:11:56,636 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 38 changer transitions 0/475 dead transitions. [2024-06-14 14:11:56,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 475 transitions, 7373 flow [2024-06-14 14:11:56,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:11:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:11:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 14:11:56,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-14 14:11:56,637 INFO L175 Difference]: Start difference. First operand has 375 places, 453 transitions, 6335 flow. Second operand 9 states and 198 transitions. [2024-06-14 14:11:56,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 475 transitions, 7373 flow [2024-06-14 14:12:01,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 475 transitions, 6960 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 14:12:01,576 INFO L231 Difference]: Finished difference. Result has 377 places, 455 transitions, 6061 flow [2024-06-14 14:12:01,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5922, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6061, PETRI_PLACES=377, PETRI_TRANSITIONS=455} [2024-06-14 14:12:01,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-14 14:12:01,576 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 455 transitions, 6061 flow [2024-06-14 14:12:01,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:01,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:01,576 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, 1] [2024-06-14 14:12:01,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 14:12:01,577 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:01,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:01,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1064385510, now seen corresponding path program 12 times [2024-06-14 14:12:01,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:01,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211590172] [2024-06-14 14:12:01,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:01,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:01,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:01,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:01,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211590172] [2024-06-14 14:12:01,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211590172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:01,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:01,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:12:01,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415884595] [2024-06-14 14:12:01,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:01,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:12:01,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:01,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:12:01,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:12:01,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:01,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 455 transitions, 6061 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:01,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:01,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:01,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:03,583 INFO L124 PetriNetUnfolderBase]: 4938/8566 cut-off events. [2024-06-14 14:12:03,583 INFO L125 PetriNetUnfolderBase]: For 1311223/1311223 co-relation queries the response was YES. [2024-06-14 14:12:03,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60347 conditions, 8566 events. 4938/8566 cut-off events. For 1311223/1311223 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 63225 event pairs, 1519 based on Foata normal form. 2/8567 useless extension candidates. Maximal degree in co-relation 60170. Up to 7806 conditions per place. [2024-06-14 14:12:03,694 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 42 changer transitions 0/479 dead transitions. [2024-06-14 14:12:03,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 479 transitions, 7106 flow [2024-06-14 14:12:03,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:12:03,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:12:03,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-14 14:12:03,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-14 14:12:03,695 INFO L175 Difference]: Start difference. First operand has 377 places, 455 transitions, 6061 flow. Second operand 10 states and 217 transitions. [2024-06-14 14:12:03,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 479 transitions, 7106 flow [2024-06-14 14:12:08,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 479 transitions, 6993 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 14:12:08,671 INFO L231 Difference]: Finished difference. Result has 380 places, 457 transitions, 6090 flow [2024-06-14 14:12:08,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5948, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6090, PETRI_PLACES=380, PETRI_TRANSITIONS=457} [2024-06-14 14:12:08,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-14 14:12:08,671 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 457 transitions, 6090 flow [2024-06-14 14:12:08,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:08,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:08,672 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, 1] [2024-06-14 14:12:08,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 14:12:08,672 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:08,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:08,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1872987143, now seen corresponding path program 4 times [2024-06-14 14:12:08,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:08,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261681587] [2024-06-14 14:12:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:08,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:08,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:08,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261681587] [2024-06-14 14:12:08,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261681587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:08,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:08,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:08,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722936459] [2024-06-14 14:12:08,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:08,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:08,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:08,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:08,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:08,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:08,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 457 transitions, 6090 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:08,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:08,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:08,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:10,450 INFO L124 PetriNetUnfolderBase]: 4951/8588 cut-off events. [2024-06-14 14:12:10,450 INFO L125 PetriNetUnfolderBase]: For 1331134/1331134 co-relation queries the response was YES. [2024-06-14 14:12:10,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60709 conditions, 8588 events. 4951/8588 cut-off events. For 1331134/1331134 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 63517 event pairs, 1521 based on Foata normal form. 1/8588 useless extension candidates. Maximal degree in co-relation 60531. Up to 7309 conditions per place. [2024-06-14 14:12:10,577 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 178 changer transitions 0/496 dead transitions. [2024-06-14 14:12:10,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 496 transitions, 7720 flow [2024-06-14 14:12:10,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:12:10,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:12:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-14 14:12:10,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 14:12:10,578 INFO L175 Difference]: Start difference. First operand has 380 places, 457 transitions, 6090 flow. Second operand 9 states and 222 transitions. [2024-06-14 14:12:10,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 496 transitions, 7720 flow [2024-06-14 14:12:15,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 496 transitions, 7603 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-14 14:12:15,911 INFO L231 Difference]: Finished difference. Result has 381 places, 463 transitions, 6398 flow [2024-06-14 14:12:15,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5973, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6398, PETRI_PLACES=381, PETRI_TRANSITIONS=463} [2024-06-14 14:12:15,912 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-14 14:12:15,912 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 463 transitions, 6398 flow [2024-06-14 14:12:15,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:15,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:15,912 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, 1] [2024-06-14 14:12:15,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 14:12:15,912 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:15,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:15,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1872981563, now seen corresponding path program 5 times [2024-06-14 14:12:15,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:15,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795228752] [2024-06-14 14:12:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:15,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:16,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:16,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:16,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795228752] [2024-06-14 14:12:16,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795228752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:16,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:16,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:16,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594408910] [2024-06-14 14:12:16,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:16,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:16,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:16,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:16,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:16,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:16,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 463 transitions, 6398 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:16,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:16,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:16,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:17,680 INFO L124 PetriNetUnfolderBase]: 4964/8610 cut-off events. [2024-06-14 14:12:17,680 INFO L125 PetriNetUnfolderBase]: For 1361259/1361259 co-relation queries the response was YES. [2024-06-14 14:12:17,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61558 conditions, 8610 events. 4964/8610 cut-off events. For 1361259/1361259 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 63673 event pairs, 1521 based on Foata normal form. 1/8610 useless extension candidates. Maximal degree in co-relation 61379. Up to 7324 conditions per place. [2024-06-14 14:12:17,808 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 312 selfloop transitions, 180 changer transitions 0/499 dead transitions. [2024-06-14 14:12:17,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 499 transitions, 8042 flow [2024-06-14 14:12:17,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:12:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:12:17,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-14 14:12:17,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767195767195767 [2024-06-14 14:12:17,808 INFO L175 Difference]: Start difference. First operand has 381 places, 463 transitions, 6398 flow. Second operand 9 states and 218 transitions. [2024-06-14 14:12:17,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 499 transitions, 8042 flow [2024-06-14 14:12:23,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 499 transitions, 7790 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:12:23,250 INFO L231 Difference]: Finished difference. Result has 385 places, 469 transitions, 6588 flow [2024-06-14 14:12:23,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6152, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6588, PETRI_PLACES=385, PETRI_TRANSITIONS=469} [2024-06-14 14:12:23,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-14 14:12:23,250 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 469 transitions, 6588 flow [2024-06-14 14:12:23,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:23,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:23,251 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, 1] [2024-06-14 14:12:23,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 14:12:23,251 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:23,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash -389517925, now seen corresponding path program 6 times [2024-06-14 14:12:23,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:23,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529705500] [2024-06-14 14:12:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:23,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:23,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:23,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529705500] [2024-06-14 14:12:23,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529705500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:23,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:23,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:23,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526850983] [2024-06-14 14:12:23,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:23,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:23,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:23,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:23,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:23,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 469 transitions, 6588 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:23,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:23,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:23,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:25,291 INFO L124 PetriNetUnfolderBase]: 4961/8606 cut-off events. [2024-06-14 14:12:25,292 INFO L125 PetriNetUnfolderBase]: For 1374347/1374347 co-relation queries the response was YES. [2024-06-14 14:12:25,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61698 conditions, 8606 events. 4961/8606 cut-off events. For 1374347/1374347 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 63675 event pairs, 1521 based on Foata normal form. 1/8606 useless extension candidates. Maximal degree in co-relation 61518. Up to 7321 conditions per place. [2024-06-14 14:12:25,407 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 296 selfloop transitions, 203 changer transitions 0/506 dead transitions. [2024-06-14 14:12:25,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 506 transitions, 8194 flow [2024-06-14 14:12:25,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:12:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:12:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-14 14:12:25,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-14 14:12:25,408 INFO L175 Difference]: Start difference. First operand has 385 places, 469 transitions, 6588 flow. Second operand 10 states and 243 transitions. [2024-06-14 14:12:25,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 506 transitions, 8194 flow [2024-06-14 14:12:30,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 506 transitions, 7938 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:12:30,383 INFO L231 Difference]: Finished difference. Result has 390 places, 469 transitions, 6746 flow [2024-06-14 14:12:30,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6332, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6746, PETRI_PLACES=390, PETRI_TRANSITIONS=469} [2024-06-14 14:12:30,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-14 14:12:30,384 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 469 transitions, 6746 flow [2024-06-14 14:12:30,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:30,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:30,384 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, 1, 1] [2024-06-14 14:12:30,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 14:12:30,385 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:30,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:30,385 INFO L85 PathProgramCache]: Analyzing trace with hash 737628533, now seen corresponding path program 7 times [2024-06-14 14:12:30,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:30,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127530124] [2024-06-14 14:12:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:30,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:30,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:30,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127530124] [2024-06-14 14:12:30,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127530124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:30,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:30,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:30,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801373198] [2024-06-14 14:12:30,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:30,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:30,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:30,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:30,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:30,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:30,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 469 transitions, 6746 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:30,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:30,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:30,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:32,407 INFO L124 PetriNetUnfolderBase]: 4974/8628 cut-off events. [2024-06-14 14:12:32,407 INFO L125 PetriNetUnfolderBase]: For 1404254/1404254 co-relation queries the response was YES. [2024-06-14 14:12:32,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62274 conditions, 8628 events. 4974/8628 cut-off events. For 1404254/1404254 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 63824 event pairs, 1521 based on Foata normal form. 1/8628 useless extension candidates. Maximal degree in co-relation 62093. Up to 7336 conditions per place. [2024-06-14 14:12:32,517 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 308 selfloop transitions, 187 changer transitions 0/502 dead transitions. [2024-06-14 14:12:32,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 502 transitions, 8408 flow [2024-06-14 14:12:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:12:32,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:12:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-14 14:12:32,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-14 14:12:32,519 INFO L175 Difference]: Start difference. First operand has 390 places, 469 transitions, 6746 flow. Second operand 9 states and 215 transitions. [2024-06-14 14:12:32,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 502 transitions, 8408 flow [2024-06-14 14:12:37,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 502 transitions, 7815 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 14:12:37,926 INFO L231 Difference]: Finished difference. Result has 389 places, 475 transitions, 6620 flow [2024-06-14 14:12:37,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6171, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6620, PETRI_PLACES=389, PETRI_TRANSITIONS=475} [2024-06-14 14:12:37,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-14 14:12:37,927 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 475 transitions, 6620 flow [2024-06-14 14:12:37,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:37,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:37,927 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, 1] [2024-06-14 14:12:37,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 14:12:37,928 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:37,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:37,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1851160515, now seen corresponding path program 8 times [2024-06-14 14:12:37,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:37,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399604780] [2024-06-14 14:12:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:37,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:38,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:38,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:38,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399604780] [2024-06-14 14:12:38,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399604780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:38,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:38,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:38,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793683495] [2024-06-14 14:12:38,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:38,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:38,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:38,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:38,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:38,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:38,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 475 transitions, 6620 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:38,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:38,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:38,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:40,212 INFO L124 PetriNetUnfolderBase]: 4979/8637 cut-off events. [2024-06-14 14:12:40,212 INFO L125 PetriNetUnfolderBase]: For 1423821/1423821 co-relation queries the response was YES. [2024-06-14 14:12:40,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62228 conditions, 8637 events. 4979/8637 cut-off events. For 1423821/1423821 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 63974 event pairs, 1521 based on Foata normal form. 1/8637 useless extension candidates. Maximal degree in co-relation 62046. Up to 7342 conditions per place. [2024-06-14 14:12:40,323 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 305 selfloop transitions, 193 changer transitions 0/505 dead transitions. [2024-06-14 14:12:40,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 505 transitions, 8246 flow [2024-06-14 14:12:40,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:12:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:12:40,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-14 14:12:40,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-14 14:12:40,324 INFO L175 Difference]: Start difference. First operand has 389 places, 475 transitions, 6620 flow. Second operand 9 states and 215 transitions. [2024-06-14 14:12:40,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 505 transitions, 8246 flow [2024-06-14 14:12:46,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 505 transitions, 7993 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:12:46,108 INFO L231 Difference]: Finished difference. Result has 393 places, 478 transitions, 6800 flow [2024-06-14 14:12:46,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6370, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6800, PETRI_PLACES=393, PETRI_TRANSITIONS=478} [2024-06-14 14:12:46,109 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-14 14:12:46,109 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 478 transitions, 6800 flow [2024-06-14 14:12:46,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:46,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:46,109 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, 1] [2024-06-14 14:12:46,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 14:12:46,109 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:46,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:46,109 INFO L85 PathProgramCache]: Analyzing trace with hash 702949649, now seen corresponding path program 9 times [2024-06-14 14:12:46,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:46,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9539484] [2024-06-14 14:12:46,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:46,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:46,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:46,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9539484] [2024-06-14 14:12:46,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9539484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:46,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:46,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:46,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440362928] [2024-06-14 14:12:46,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:46,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:46,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:46,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:46,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:46,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:46,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 478 transitions, 6800 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:46,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:46,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:46,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:48,194 INFO L124 PetriNetUnfolderBase]: 4976/8633 cut-off events. [2024-06-14 14:12:48,195 INFO L125 PetriNetUnfolderBase]: For 1437805/1437805 co-relation queries the response was YES. [2024-06-14 14:12:48,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62320 conditions, 8633 events. 4976/8633 cut-off events. For 1437805/1437805 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 63877 event pairs, 1521 based on Foata normal form. 1/8633 useless extension candidates. Maximal degree in co-relation 62137. Up to 7339 conditions per place. [2024-06-14 14:12:48,317 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 212 changer transitions 0/511 dead transitions. [2024-06-14 14:12:48,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 511 transitions, 8154 flow [2024-06-14 14:12:48,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:12:48,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:12:48,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-14 14:12:48,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 14:12:48,318 INFO L175 Difference]: Start difference. First operand has 393 places, 478 transitions, 6800 flow. Second operand 10 states and 238 transitions. [2024-06-14 14:12:48,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 511 transitions, 8154 flow [2024-06-14 14:12:54,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 511 transitions, 7847 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:12:54,266 INFO L231 Difference]: Finished difference. Result has 397 places, 478 transitions, 6924 flow [2024-06-14 14:12:54,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6493, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6924, PETRI_PLACES=397, PETRI_TRANSITIONS=478} [2024-06-14 14:12:54,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-14 14:12:54,266 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 478 transitions, 6924 flow [2024-06-14 14:12:54,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:54,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:54,266 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, 1] [2024-06-14 14:12:54,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 14:12:54,266 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:54,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1742097297, now seen corresponding path program 10 times [2024-06-14 14:12:54,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:54,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84718701] [2024-06-14 14:12:54,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:54,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:54,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:54,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84718701] [2024-06-14 14:12:54,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84718701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:54,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:54,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:54,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886688527] [2024-06-14 14:12:54,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:54,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:54,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:54,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:54,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:54,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:12:54,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 478 transitions, 6924 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:54,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:54,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:12:54,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:56,262 INFO L124 PetriNetUnfolderBase]: 4973/8629 cut-off events. [2024-06-14 14:12:56,262 INFO L125 PetriNetUnfolderBase]: For 1450344/1450344 co-relation queries the response was YES. [2024-06-14 14:12:56,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62456 conditions, 8629 events. 4973/8629 cut-off events. For 1450344/1450344 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 63917 event pairs, 1533 based on Foata normal form. 1/8628 useless extension candidates. Maximal degree in co-relation 62272. Up to 7336 conditions per place. [2024-06-14 14:12:56,502 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 308 selfloop transitions, 182 changer transitions 0/497 dead transitions. [2024-06-14 14:12:56,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 497 transitions, 8216 flow [2024-06-14 14:12:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:56,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:12:56,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:12:56,503 INFO L175 Difference]: Start difference. First operand has 397 places, 478 transitions, 6924 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:12:56,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 497 transitions, 8216 flow [2024-06-14 14:13:02,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 497 transitions, 7788 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-14 14:13:02,781 INFO L231 Difference]: Finished difference. Result has 396 places, 478 transitions, 6866 flow [2024-06-14 14:13:02,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6866, PETRI_PLACES=396, PETRI_TRANSITIONS=478} [2024-06-14 14:13:02,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-14 14:13:02,781 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 478 transitions, 6866 flow [2024-06-14 14:13:02,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:02,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:02,782 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, 1] [2024-06-14 14:13:02,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 14:13:02,782 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:02,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:02,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1779732039, now seen corresponding path program 11 times [2024-06-14 14:13:02,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:02,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071362130] [2024-06-14 14:13:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:02,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:02,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:02,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071362130] [2024-06-14 14:13:02,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071362130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:02,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:02,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:13:02,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914032580] [2024-06-14 14:13:02,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:02,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:13:02,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:02,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:13:02,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:13:03,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:03,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 478 transitions, 6866 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:03,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:03,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:03,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:04,808 INFO L124 PetriNetUnfolderBase]: 4970/8625 cut-off events. [2024-06-14 14:13:04,808 INFO L125 PetriNetUnfolderBase]: For 1463014/1463014 co-relation queries the response was YES. [2024-06-14 14:13:04,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62393 conditions, 8625 events. 4970/8625 cut-off events. For 1463014/1463014 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 63819 event pairs, 1533 based on Foata normal form. 1/8624 useless extension candidates. Maximal degree in co-relation 62208. Up to 7333 conditions per place. [2024-06-14 14:13:04,920 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 308 selfloop transitions, 181 changer transitions 0/496 dead transitions. [2024-06-14 14:13:04,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 496 transitions, 7888 flow [2024-06-14 14:13:04,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:13:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:13:04,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:13:04,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:13:04,921 INFO L175 Difference]: Start difference. First operand has 396 places, 478 transitions, 6866 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:13:04,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 496 transitions, 7888 flow [2024-06-14 14:13:10,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 496 transitions, 6967 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 14:13:10,372 INFO L231 Difference]: Finished difference. Result has 393 places, 478 transitions, 6313 flow [2024-06-14 14:13:10,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5945, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6313, PETRI_PLACES=393, PETRI_TRANSITIONS=478} [2024-06-14 14:13:10,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-14 14:13:10,372 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 478 transitions, 6313 flow [2024-06-14 14:13:10,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:10,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:10,372 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, 1] [2024-06-14 14:13:10,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 14:13:10,373 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:10,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:10,373 INFO L85 PathProgramCache]: Analyzing trace with hash 243103357, now seen corresponding path program 1 times [2024-06-14 14:13:10,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:10,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293736999] [2024-06-14 14:13:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:10,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:10,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:10,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:10,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293736999] [2024-06-14 14:13:10,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293736999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:10,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:10,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:13:10,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910695111] [2024-06-14 14:13:10,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:10,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:13:10,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:10,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:13:10,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:13:10,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:10,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 478 transitions, 6313 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:10,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:10,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:10,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:12,432 INFO L124 PetriNetUnfolderBase]: 4957/8606 cut-off events. [2024-06-14 14:13:12,432 INFO L125 PetriNetUnfolderBase]: For 1469362/1469362 co-relation queries the response was YES. [2024-06-14 14:13:12,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61154 conditions, 8606 events. 4957/8606 cut-off events. For 1469362/1469362 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 63643 event pairs, 1311 based on Foata normal form. 6/8611 useless extension candidates. Maximal degree in co-relation 60968. Up to 6329 conditions per place. [2024-06-14 14:13:12,549 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 385 selfloop transitions, 125 changer transitions 0/517 dead transitions. [2024-06-14 14:13:12,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 517 transitions, 7719 flow [2024-06-14 14:13:12,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:13:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:13:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-14 14:13:12,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 14:13:12,550 INFO L175 Difference]: Start difference. First operand has 393 places, 478 transitions, 6313 flow. Second operand 9 states and 222 transitions. [2024-06-14 14:13:12,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 517 transitions, 7719 flow [2024-06-14 14:13:19,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 517 transitions, 7215 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 14:13:19,514 INFO L231 Difference]: Finished difference. Result has 393 places, 478 transitions, 6069 flow [2024-06-14 14:13:19,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5809, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6069, PETRI_PLACES=393, PETRI_TRANSITIONS=478} [2024-06-14 14:13:19,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-14 14:13:19,515 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 478 transitions, 6069 flow [2024-06-14 14:13:19,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:19,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:19,515 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, 1] [2024-06-14 14:13:19,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 14:13:19,515 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:19,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:19,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1406324778, now seen corresponding path program 13 times [2024-06-14 14:13:19,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:19,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244040882] [2024-06-14 14:13:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:19,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:19,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:19,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244040882] [2024-06-14 14:13:19,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244040882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:19,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:19,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:19,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256420993] [2024-06-14 14:13:19,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:19,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:19,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:19,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:19,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:19,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:19,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 478 transitions, 6069 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:19,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:19,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:19,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:21,642 INFO L124 PetriNetUnfolderBase]: 4993/8653 cut-off events. [2024-06-14 14:13:21,642 INFO L125 PetriNetUnfolderBase]: For 1532244/1532244 co-relation queries the response was YES. [2024-06-14 14:13:21,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61841 conditions, 8653 events. 4993/8653 cut-off events. For 1532244/1532244 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 64001 event pairs, 1500 based on Foata normal form. 10/8662 useless extension candidates. Maximal degree in co-relation 61654. Up to 6014 conditions per place. [2024-06-14 14:13:21,760 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 334 selfloop transitions, 185 changer transitions 0/526 dead transitions. [2024-06-14 14:13:21,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 526 transitions, 7576 flow [2024-06-14 14:13:21,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:13:21,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:13:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-14 14:13:21,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:13:21,761 INFO L175 Difference]: Start difference. First operand has 393 places, 478 transitions, 6069 flow. Second operand 10 states and 252 transitions. [2024-06-14 14:13:21,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 526 transitions, 7576 flow [2024-06-14 14:13:28,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 526 transitions, 7309 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 14:13:28,492 INFO L231 Difference]: Finished difference. Result has 394 places, 480 transitions, 6234 flow [2024-06-14 14:13:28,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5804, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6234, PETRI_PLACES=394, PETRI_TRANSITIONS=480} [2024-06-14 14:13:28,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-14 14:13:28,493 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 480 transitions, 6234 flow [2024-06-14 14:13:28,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:28,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:28,493 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, 1] [2024-06-14 14:13:28,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 14:13:28,493 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:28,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:28,494 INFO L85 PathProgramCache]: Analyzing trace with hash -27748696, now seen corresponding path program 14 times [2024-06-14 14:13:28,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:28,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341625871] [2024-06-14 14:13:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:28,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:28,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:28,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341625871] [2024-06-14 14:13:28,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341625871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:28,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:28,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:28,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981711795] [2024-06-14 14:13:28,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:28,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:28,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:28,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:28,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:28,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:28,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 480 transitions, 6234 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:28,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:28,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:28,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:30,571 INFO L124 PetriNetUnfolderBase]: 5029/8718 cut-off events. [2024-06-14 14:13:30,572 INFO L125 PetriNetUnfolderBase]: For 1534911/1534911 co-relation queries the response was YES. [2024-06-14 14:13:30,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62328 conditions, 8718 events. 5029/8718 cut-off events. For 1534911/1534911 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 64566 event pairs, 1522 based on Foata normal form. 10/8727 useless extension candidates. Maximal degree in co-relation 62141. Up to 7388 conditions per place. [2024-06-14 14:13:30,689 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 331 selfloop transitions, 180 changer transitions 0/518 dead transitions. [2024-06-14 14:13:30,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 518 transitions, 7413 flow [2024-06-14 14:13:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:13:30,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:13:30,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-14 14:13:30,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-14 14:13:30,690 INFO L175 Difference]: Start difference. First operand has 394 places, 480 transitions, 6234 flow. Second operand 10 states and 243 transitions. [2024-06-14 14:13:30,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 518 transitions, 7413 flow [2024-06-14 14:13:38,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 518 transitions, 7048 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 14:13:38,011 INFO L231 Difference]: Finished difference. Result has 397 places, 482 transitions, 6292 flow [2024-06-14 14:13:38,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5870, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6292, PETRI_PLACES=397, PETRI_TRANSITIONS=482} [2024-06-14 14:13:38,012 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-14 14:13:38,012 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 482 transitions, 6292 flow [2024-06-14 14:13:38,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:38,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:38,012 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, 1] [2024-06-14 14:13:38,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 14:13:38,013 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:38,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:38,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1649549428, now seen corresponding path program 15 times [2024-06-14 14:13:38,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:38,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210847011] [2024-06-14 14:13:38,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:38,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:38,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:38,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:38,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210847011] [2024-06-14 14:13:38,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210847011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:38,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:38,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:38,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583740094] [2024-06-14 14:13:38,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:38,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:38,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:38,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:38,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:38,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:38,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 482 transitions, 6292 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:38,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:38,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:38,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:40,108 INFO L124 PetriNetUnfolderBase]: 5065/8774 cut-off events. [2024-06-14 14:13:40,108 INFO L125 PetriNetUnfolderBase]: For 1558444/1558444 co-relation queries the response was YES. [2024-06-14 14:13:40,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62838 conditions, 8774 events. 5065/8774 cut-off events. For 1558444/1558444 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 64979 event pairs, 1526 based on Foata normal form. 10/8783 useless extension candidates. Maximal degree in co-relation 62650. Up to 7444 conditions per place. [2024-06-14 14:13:40,230 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 331 selfloop transitions, 179 changer transitions 0/517 dead transitions. [2024-06-14 14:13:40,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 517 transitions, 7464 flow [2024-06-14 14:13:40,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:13:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:13:40,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-14 14:13:40,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:13:40,231 INFO L175 Difference]: Start difference. First operand has 397 places, 482 transitions, 6292 flow. Second operand 10 states and 240 transitions. [2024-06-14 14:13:40,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 517 transitions, 7464 flow [2024-06-14 14:13:47,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 517 transitions, 7078 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 14:13:47,477 INFO L231 Difference]: Finished difference. Result has 399 places, 484 transitions, 6330 flow [2024-06-14 14:13:47,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5906, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6330, PETRI_PLACES=399, PETRI_TRANSITIONS=484} [2024-06-14 14:13:47,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-14 14:13:47,477 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 484 transitions, 6330 flow [2024-06-14 14:13:47,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:47,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:47,477 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, 1] [2024-06-14 14:13:47,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 14:13:47,477 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:47,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:47,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1592424710, now seen corresponding path program 16 times [2024-06-14 14:13:47,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:47,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679217902] [2024-06-14 14:13:47,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:47,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:47,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:47,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679217902] [2024-06-14 14:13:47,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679217902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:47,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:47,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:47,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570400588] [2024-06-14 14:13:47,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:47,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:47,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:47,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:47,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:47,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:47,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 484 transitions, 6330 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:47,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:47,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:47,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:49,623 INFO L124 PetriNetUnfolderBase]: 5032/8715 cut-off events. [2024-06-14 14:13:49,623 INFO L125 PetriNetUnfolderBase]: For 1581844/1581844 co-relation queries the response was YES. [2024-06-14 14:13:49,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58076 conditions, 8715 events. 5032/8715 cut-off events. For 1581844/1581844 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 64492 event pairs, 1469 based on Foata normal form. 44/8758 useless extension candidates. Maximal degree in co-relation 57887. Up to 7231 conditions per place. [2024-06-14 14:13:49,740 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 188 changer transitions 3/519 dead transitions. [2024-06-14 14:13:49,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 519 transitions, 7514 flow [2024-06-14 14:13:49,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:13:49,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:13:49,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-14 14:13:49,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-14 14:13:49,741 INFO L175 Difference]: Start difference. First operand has 399 places, 484 transitions, 6330 flow. Second operand 11 states and 259 transitions. [2024-06-14 14:13:49,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 519 transitions, 7514 flow [2024-06-14 14:13:56,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 519 transitions, 7126 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 14:13:56,247 INFO L231 Difference]: Finished difference. Result has 402 places, 485 transitions, 6378 flow [2024-06-14 14:13:56,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5942, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6378, PETRI_PLACES=402, PETRI_TRANSITIONS=485} [2024-06-14 14:13:56,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-14 14:13:56,247 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 485 transitions, 6378 flow [2024-06-14 14:13:56,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:56,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:56,248 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, 1] [2024-06-14 14:13:56,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 14:13:56,248 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:56,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:56,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1175594184, now seen corresponding path program 17 times [2024-06-14 14:13:56,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:56,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271173766] [2024-06-14 14:13:56,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:56,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:56,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:56,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:56,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271173766] [2024-06-14 14:13:56,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271173766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:56,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:56,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:13:56,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317032990] [2024-06-14 14:13:56,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:56,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:13:56,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:56,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:13:56,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:13:56,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:13:56,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 485 transitions, 6378 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:56,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:56,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:13:56,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:58,422 INFO L124 PetriNetUnfolderBase]: 4960/8594 cut-off events. [2024-06-14 14:13:58,423 INFO L125 PetriNetUnfolderBase]: For 1175022/1175022 co-relation queries the response was YES. [2024-06-14 14:13:58,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56024 conditions, 8594 events. 4960/8594 cut-off events. For 1175022/1175022 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 63367 event pairs, 1451 based on Foata normal form. 10/8602 useless extension candidates. Maximal degree in co-relation 55834. Up to 7277 conditions per place. [2024-06-14 14:13:58,539 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 206 changer transitions 5/510 dead transitions. [2024-06-14 14:13:58,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 510 transitions, 7458 flow [2024-06-14 14:13:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:13:58,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:13:58,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-14 14:13:58,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-14 14:13:58,540 INFO L175 Difference]: Start difference. First operand has 402 places, 485 transitions, 6378 flow. Second operand 11 states and 249 transitions. [2024-06-14 14:13:58,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 510 transitions, 7458 flow [2024-06-14 14:14:04,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 510 transitions, 7028 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-14 14:14:04,597 INFO L231 Difference]: Finished difference. Result has 404 places, 483 transitions, 6339 flow [2024-06-14 14:14:04,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5948, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6339, PETRI_PLACES=404, PETRI_TRANSITIONS=483} [2024-06-14 14:14:04,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-14 14:14:04,598 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 483 transitions, 6339 flow [2024-06-14 14:14:04,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:04,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:04,598 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, 1] [2024-06-14 14:14:04,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 14:14:04,598 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:04,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:04,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1193358674, now seen corresponding path program 18 times [2024-06-14 14:14:04,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:04,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002204342] [2024-06-14 14:14:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:04,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:04,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:04,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002204342] [2024-06-14 14:14:04,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002204342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:04,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:04,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:14:04,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256810671] [2024-06-14 14:14:04,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:04,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:14:04,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:04,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:14:04,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:14:04,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:04,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 483 transitions, 6339 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:04,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:04,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:04,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:06,810 INFO L124 PetriNetUnfolderBase]: 4876/8430 cut-off events. [2024-06-14 14:14:06,811 INFO L125 PetriNetUnfolderBase]: For 1088534/1088534 co-relation queries the response was YES. [2024-06-14 14:14:06,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53620 conditions, 8430 events. 4876/8430 cut-off events. For 1088534/1088534 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 61919 event pairs, 1399 based on Foata normal form. 10/8438 useless extension candidates. Maximal degree in co-relation 53429. Up to 7139 conditions per place. [2024-06-14 14:14:06,933 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 288 selfloop transitions, 208 changer transitions 4/507 dead transitions. [2024-06-14 14:14:06,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 507 transitions, 7411 flow [2024-06-14 14:14:06,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:14:06,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:14:06,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-14 14:14:06,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-06-14 14:14:06,934 INFO L175 Difference]: Start difference. First operand has 404 places, 483 transitions, 6339 flow. Second operand 10 states and 233 transitions. [2024-06-14 14:14:06,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 507 transitions, 7411 flow [2024-06-14 14:14:12,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 507 transitions, 6897 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-14 14:14:12,064 INFO L231 Difference]: Finished difference. Result has 403 places, 482 transitions, 6235 flow [2024-06-14 14:14:12,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5825, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6235, PETRI_PLACES=403, PETRI_TRANSITIONS=482} [2024-06-14 14:14:12,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-14 14:14:12,064 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 482 transitions, 6235 flow [2024-06-14 14:14:12,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:12,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:12,065 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, 1] [2024-06-14 14:14:12,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 14:14:12,065 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:12,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:12,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1474288978, now seen corresponding path program 19 times [2024-06-14 14:14:12,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:12,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565574461] [2024-06-14 14:14:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:12,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:12,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:12,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:12,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565574461] [2024-06-14 14:14:12,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565574461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:12,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:12,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:14:12,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967529854] [2024-06-14 14:14:12,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:12,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:14:12,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:12,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:14:12,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:14:12,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:12,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 482 transitions, 6235 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:12,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:12,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:12,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:14,012 INFO L124 PetriNetUnfolderBase]: 4794/8279 cut-off events. [2024-06-14 14:14:14,013 INFO L125 PetriNetUnfolderBase]: For 1000589/1000589 co-relation queries the response was YES. [2024-06-14 14:14:14,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51210 conditions, 8279 events. 4794/8279 cut-off events. For 1000589/1000589 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 60546 event pairs, 1348 based on Foata normal form. 10/8288 useless extension candidates. Maximal degree in co-relation 51018. Up to 7534 conditions per place. [2024-06-14 14:14:14,123 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 36 changer transitions 4/506 dead transitions. [2024-06-14 14:14:14,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 506 transitions, 7305 flow [2024-06-14 14:14:14,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:14:14,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:14:14,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-14 14:14:14,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-14 14:14:14,124 INFO L175 Difference]: Start difference. First operand has 403 places, 482 transitions, 6235 flow. Second operand 10 states and 219 transitions. [2024-06-14 14:14:14,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 506 transitions, 7305 flow [2024-06-14 14:14:19,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 506 transitions, 6796 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-14 14:14:19,972 INFO L231 Difference]: Finished difference. Result has 403 places, 481 transitions, 5790 flow [2024-06-14 14:14:19,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5726, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5790, PETRI_PLACES=403, PETRI_TRANSITIONS=481} [2024-06-14 14:14:19,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-14 14:14:19,973 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 481 transitions, 5790 flow [2024-06-14 14:14:19,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:19,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:19,973 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, 1] [2024-06-14 14:14:19,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 14:14:19,973 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:19,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:19,974 INFO L85 PathProgramCache]: Analyzing trace with hash 866892808, now seen corresponding path program 20 times [2024-06-14 14:14:19,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:19,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417302443] [2024-06-14 14:14:19,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:19,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:19,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:20,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:20,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:20,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417302443] [2024-06-14 14:14:20,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417302443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:20,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:20,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:14:20,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048967712] [2024-06-14 14:14:20,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:20,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:14:20,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:20,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:14:20,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:14:20,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:20,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 481 transitions, 5790 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:20,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:20,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:20,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:21,991 INFO L124 PetriNetUnfolderBase]: 4712/8117 cut-off events. [2024-06-14 14:14:21,991 INFO L125 PetriNetUnfolderBase]: For 908393/908393 co-relation queries the response was YES. [2024-06-14 14:14:22,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48257 conditions, 8117 events. 4712/8117 cut-off events. For 908393/908393 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 58985 event pairs, 1278 based on Foata normal form. 10/8126 useless extension candidates. Maximal degree in co-relation 48064. Up to 7316 conditions per place. [2024-06-14 14:14:22,099 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 457 selfloop transitions, 39 changer transitions 7/510 dead transitions. [2024-06-14 14:14:22,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 510 transitions, 6894 flow [2024-06-14 14:14:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:14:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:14:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-14 14:14:22,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2024-06-14 14:14:22,100 INFO L175 Difference]: Start difference. First operand has 403 places, 481 transitions, 5790 flow. Second operand 11 states and 240 transitions. [2024-06-14 14:14:22,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 510 transitions, 6894 flow [2024-06-14 14:14:26,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 510 transitions, 6718 flow, removed 23 selfloop flow, removed 12 redundant places. [2024-06-14 14:14:26,977 INFO L231 Difference]: Finished difference. Result has 402 places, 480 transitions, 5684 flow [2024-06-14 14:14:26,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5614, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5684, PETRI_PLACES=402, PETRI_TRANSITIONS=480} [2024-06-14 14:14:26,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-14 14:14:26,977 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 480 transitions, 5684 flow [2024-06-14 14:14:26,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:26,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:26,978 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, 1] [2024-06-14 14:14:26,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 14:14:26,978 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:26,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1847346001, now seen corresponding path program 1 times [2024-06-14 14:14:26,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:26,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487912927] [2024-06-14 14:14:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:26,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:27,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:27,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487912927] [2024-06-14 14:14:27,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487912927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:27,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:27,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:27,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350226668] [2024-06-14 14:14:27,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:27,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:27,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:27,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:27,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:27,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:27,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 480 transitions, 5684 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:27,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:27,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:27,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:28,940 INFO L124 PetriNetUnfolderBase]: 4648/8017 cut-off events. [2024-06-14 14:14:28,940 INFO L125 PetriNetUnfolderBase]: For 817477/817477 co-relation queries the response was YES. [2024-06-14 14:14:29,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45678 conditions, 8017 events. 4648/8017 cut-off events. For 817477/817477 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 58240 event pairs, 1255 based on Foata normal form. 12/8022 useless extension candidates. Maximal degree in co-relation 45486. Up to 6970 conditions per place. [2024-06-14 14:14:29,044 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 415 selfloop transitions, 96 changer transitions 0/518 dead transitions. [2024-06-14 14:14:29,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 518 transitions, 6816 flow [2024-06-14 14:14:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:14:29,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:14:29,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-14 14:14:29,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-14 14:14:29,045 INFO L175 Difference]: Start difference. First operand has 402 places, 480 transitions, 5684 flow. Second operand 9 states and 222 transitions. [2024-06-14 14:14:29,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 518 transitions, 6816 flow [2024-06-14 14:14:33,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 518 transitions, 6645 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-14 14:14:33,557 INFO L231 Difference]: Finished difference. Result has 400 places, 480 transitions, 5711 flow [2024-06-14 14:14:33,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5513, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5711, PETRI_PLACES=400, PETRI_TRANSITIONS=480} [2024-06-14 14:14:33,558 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-14 14:14:33,558 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 480 transitions, 5711 flow [2024-06-14 14:14:33,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:33,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:33,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:33,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 14:14:33,558 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:33,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:33,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1085205823, now seen corresponding path program 2 times [2024-06-14 14:14:33,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:33,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188193567] [2024-06-14 14:14:33,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:33,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:33,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:33,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188193567] [2024-06-14 14:14:33,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188193567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:33,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:33,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:33,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050516070] [2024-06-14 14:14:33,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:33,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:33,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:33,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:33,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:33,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:33,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 480 transitions, 5711 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:33,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:33,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:33,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:35,476 INFO L124 PetriNetUnfolderBase]: 4688/8119 cut-off events. [2024-06-14 14:14:35,476 INFO L125 PetriNetUnfolderBase]: For 829377/829377 co-relation queries the response was YES. [2024-06-14 14:14:35,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46182 conditions, 8119 events. 4688/8119 cut-off events. For 829377/829377 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 59279 event pairs, 1059 based on Foata normal form. 12/8130 useless extension candidates. Maximal degree in co-relation 45989. Up to 5868 conditions per place. [2024-06-14 14:14:35,587 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 389 selfloop transitions, 125 changer transitions 0/521 dead transitions. [2024-06-14 14:14:35,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 521 transitions, 7202 flow [2024-06-14 14:14:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:14:35,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:14:35,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-14 14:14:35,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-14 14:14:35,588 INFO L175 Difference]: Start difference. First operand has 400 places, 480 transitions, 5711 flow. Second operand 9 states and 220 transitions. [2024-06-14 14:14:35,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 521 transitions, 7202 flow [2024-06-14 14:14:39,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 521 transitions, 6842 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-14 14:14:39,598 INFO L231 Difference]: Finished difference. Result has 400 places, 482 transitions, 5666 flow [2024-06-14 14:14:39,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5351, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5666, PETRI_PLACES=400, PETRI_TRANSITIONS=482} [2024-06-14 14:14:39,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-14 14:14:39,599 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 482 transitions, 5666 flow [2024-06-14 14:14:39,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:39,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:39,599 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, 1] [2024-06-14 14:14:39,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 14:14:39,599 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:39,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:39,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1831691311, now seen corresponding path program 3 times [2024-06-14 14:14:39,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:39,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49355674] [2024-06-14 14:14:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:39,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:39,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:39,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49355674] [2024-06-14 14:14:39,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49355674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:39,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:39,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:39,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135225087] [2024-06-14 14:14:39,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:39,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:39,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:39,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:39,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:39,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:39,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 482 transitions, 5666 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:39,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:39,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:39,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:41,569 INFO L124 PetriNetUnfolderBase]: 4662/8083 cut-off events. [2024-06-14 14:14:41,569 INFO L125 PetriNetUnfolderBase]: For 713311/713311 co-relation queries the response was YES. [2024-06-14 14:14:41,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44136 conditions, 8083 events. 4662/8083 cut-off events. For 713311/713311 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 59065 event pairs, 1053 based on Foata normal form. 12/8094 useless extension candidates. Maximal degree in co-relation 43943. Up to 5856 conditions per place. [2024-06-14 14:14:41,670 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 387 selfloop transitions, 131 changer transitions 0/525 dead transitions. [2024-06-14 14:14:41,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 525 transitions, 7124 flow [2024-06-14 14:14:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:14:41,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:14:41,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-14 14:14:41,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-14 14:14:41,671 INFO L175 Difference]: Start difference. First operand has 400 places, 482 transitions, 5666 flow. Second operand 9 states and 226 transitions. [2024-06-14 14:14:41,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 525 transitions, 7124 flow [2024-06-14 14:14:46,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 525 transitions, 6560 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-06-14 14:14:46,036 INFO L231 Difference]: Finished difference. Result has 399 places, 482 transitions, 5370 flow [2024-06-14 14:14:46,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5102, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5370, PETRI_PLACES=399, PETRI_TRANSITIONS=482} [2024-06-14 14:14:46,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-14 14:14:46,037 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 482 transitions, 5370 flow [2024-06-14 14:14:46,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:46,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:46,037 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, 1] [2024-06-14 14:14:46,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 14:14:46,037 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:46,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:46,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1552278117, now seen corresponding path program 4 times [2024-06-14 14:14:46,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:46,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84497619] [2024-06-14 14:14:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:46,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:46,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:46,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:46,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84497619] [2024-06-14 14:14:46,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84497619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:46,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:46,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:46,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525071375] [2024-06-14 14:14:46,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:46,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:46,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:46,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:46,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:46,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:46,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 482 transitions, 5370 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:46,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:46,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:46,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:47,966 INFO L124 PetriNetUnfolderBase]: 4649/8047 cut-off events. [2024-06-14 14:14:47,966 INFO L125 PetriNetUnfolderBase]: For 587820/587820 co-relation queries the response was YES. [2024-06-14 14:14:48,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41708 conditions, 8047 events. 4649/8047 cut-off events. For 587820/587820 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 58708 event pairs, 1279 based on Foata normal form. 6/8045 useless extension candidates. Maximal degree in co-relation 41517. Up to 7083 conditions per place. [2024-06-14 14:14:48,065 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 411 selfloop transitions, 93 changer transitions 1/512 dead transitions. [2024-06-14 14:14:48,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 512 transitions, 6464 flow [2024-06-14 14:14:48,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:14:48,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:14:48,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 14:14:48,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-14 14:14:48,066 INFO L175 Difference]: Start difference. First operand has 399 places, 482 transitions, 5370 flow. Second operand 8 states and 197 transitions. [2024-06-14 14:14:48,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 512 transitions, 6464 flow [2024-06-14 14:14:51,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 512 transitions, 6161 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 14:14:51,372 INFO L231 Difference]: Finished difference. Result has 399 places, 482 transitions, 5257 flow [2024-06-14 14:14:51,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5067, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5257, PETRI_PLACES=399, PETRI_TRANSITIONS=482} [2024-06-14 14:14:51,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-14 14:14:51,372 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 482 transitions, 5257 flow [2024-06-14 14:14:51,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:51,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:51,373 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, 1] [2024-06-14 14:14:51,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 14:14:51,373 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:51,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1817975397, now seen corresponding path program 5 times [2024-06-14 14:14:51,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:51,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485620913] [2024-06-14 14:14:51,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:51,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:51,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:51,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485620913] [2024-06-14 14:14:51,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485620913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:51,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:51,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:51,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006824876] [2024-06-14 14:14:51,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:51,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:51,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:51,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:51,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:51,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:51,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 482 transitions, 5257 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:51,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:51,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:51,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:53,213 INFO L124 PetriNetUnfolderBase]: 4669/8059 cut-off events. [2024-06-14 14:14:53,216 INFO L125 PetriNetUnfolderBase]: For 592791/592791 co-relation queries the response was YES. [2024-06-14 14:14:53,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41196 conditions, 8059 events. 4669/8059 cut-off events. For 592791/592791 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 58661 event pairs, 1251 based on Foata normal form. 6/8051 useless extension candidates. Maximal degree in co-relation 41004. Up to 6881 conditions per place. [2024-06-14 14:14:53,325 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 397 selfloop transitions, 108 changer transitions 0/512 dead transitions. [2024-06-14 14:14:53,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 512 transitions, 6377 flow [2024-06-14 14:14:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:14:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:14:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 14:14:53,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-14 14:14:53,326 INFO L175 Difference]: Start difference. First operand has 399 places, 482 transitions, 5257 flow. Second operand 8 states and 193 transitions. [2024-06-14 14:14:53,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 512 transitions, 6377 flow [2024-06-14 14:14:57,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 512 transitions, 6165 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 14:14:57,398 INFO L231 Difference]: Finished difference. Result has 399 places, 483 transitions, 5291 flow [2024-06-14 14:14:57,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5045, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5291, PETRI_PLACES=399, PETRI_TRANSITIONS=483} [2024-06-14 14:14:57,398 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 356 predicate places. [2024-06-14 14:14:57,398 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 483 transitions, 5291 flow [2024-06-14 14:14:57,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:57,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:57,399 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, 1] [2024-06-14 14:14:57,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 14:14:57,399 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:57,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:57,399 INFO L85 PathProgramCache]: Analyzing trace with hash 480483941, now seen corresponding path program 6 times [2024-06-14 14:14:57,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:57,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839366193] [2024-06-14 14:14:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:57,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:57,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:57,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839366193] [2024-06-14 14:14:57,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839366193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:57,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:57,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:14:57,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545514499] [2024-06-14 14:14:57,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:57,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:14:57,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:57,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:14:57,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:14:57,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:14:57,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 483 transitions, 5291 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:57,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:57,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:14:57,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:59,290 INFO L124 PetriNetUnfolderBase]: 4689/8158 cut-off events. [2024-06-14 14:14:59,290 INFO L125 PetriNetUnfolderBase]: For 601104/601104 co-relation queries the response was YES. [2024-06-14 14:14:59,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41628 conditions, 8158 events. 4689/8158 cut-off events. For 601104/601104 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 59914 event pairs, 1019 based on Foata normal form. 6/8162 useless extension candidates. Maximal degree in co-relation 41435. Up to 5703 conditions per place. [2024-06-14 14:14:59,396 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 375 selfloop transitions, 139 changer transitions 0/521 dead transitions. [2024-06-14 14:14:59,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 521 transitions, 6757 flow [2024-06-14 14:14:59,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:14:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:14:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 14:14:59,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 14:14:59,396 INFO L175 Difference]: Start difference. First operand has 399 places, 483 transitions, 5291 flow. Second operand 8 states and 200 transitions. [2024-06-14 14:14:59,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 521 transitions, 6757 flow [2024-06-14 14:15:03,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 521 transitions, 6523 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 14:15:03,478 INFO L231 Difference]: Finished difference. Result has 401 places, 484 transitions, 5365 flow [2024-06-14 14:15:03,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5057, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5365, PETRI_PLACES=401, PETRI_TRANSITIONS=484} [2024-06-14 14:15:03,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-14 14:15:03,479 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 484 transitions, 5365 flow [2024-06-14 14:15:03,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:03,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:03,479 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, 1] [2024-06-14 14:15:03,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 14:15:03,479 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:03,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:03,479 INFO L85 PathProgramCache]: Analyzing trace with hash -315557149, now seen corresponding path program 7 times [2024-06-14 14:15:03,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:03,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86822841] [2024-06-14 14:15:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:03,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:03,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:03,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:03,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86822841] [2024-06-14 14:15:03,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86822841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:03,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:03,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:15:03,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257844904] [2024-06-14 14:15:03,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:03,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:15:03,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:03,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:15:03,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:15:03,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:15:03,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 484 transitions, 5365 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:03,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:03,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:15:03,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:05,520 INFO L124 PetriNetUnfolderBase]: 4709/8188 cut-off events. [2024-06-14 14:15:05,520 INFO L125 PetriNetUnfolderBase]: For 610883/610883 co-relation queries the response was YES. [2024-06-14 14:15:05,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42281 conditions, 8188 events. 4709/8188 cut-off events. For 610883/610883 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 60102 event pairs, 1084 based on Foata normal form. 6/8192 useless extension candidates. Maximal degree in co-relation 42087. Up to 5715 conditions per place. [2024-06-14 14:15:05,626 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 386 selfloop transitions, 127 changer transitions 0/520 dead transitions. [2024-06-14 14:15:05,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 520 transitions, 6827 flow [2024-06-14 14:15:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:15:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:15:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 14:15:05,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:15:05,627 INFO L175 Difference]: Start difference. First operand has 401 places, 484 transitions, 5365 flow. Second operand 8 states and 196 transitions. [2024-06-14 14:15:05,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 520 transitions, 6827 flow [2024-06-14 14:15:10,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 520 transitions, 6559 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 14:15:10,070 INFO L231 Difference]: Finished difference. Result has 404 places, 485 transitions, 5383 flow [2024-06-14 14:15:10,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5098, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5383, PETRI_PLACES=404, PETRI_TRANSITIONS=485} [2024-06-14 14:15:10,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-14 14:15:10,071 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 485 transitions, 5383 flow [2024-06-14 14:15:10,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:10,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:10,071 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, 1] [2024-06-14 14:15:10,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 14:15:10,071 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:10,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash 687404291, now seen corresponding path program 8 times [2024-06-14 14:15:10,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:10,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251843669] [2024-06-14 14:15:10,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:10,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:10,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:10,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251843669] [2024-06-14 14:15:10,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251843669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:10,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:10,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:15:10,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266892147] [2024-06-14 14:15:10,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:10,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:15:10,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:10,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:15:10,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:15:10,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:15:10,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 485 transitions, 5383 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:10,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:10,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:15:10,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:11,876 INFO L124 PetriNetUnfolderBase]: 4696/8169 cut-off events. [2024-06-14 14:15:11,876 INFO L125 PetriNetUnfolderBase]: For 550636/550636 co-relation queries the response was YES. [2024-06-14 14:15:11,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41202 conditions, 8169 events. 4696/8169 cut-off events. For 550636/550636 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 59992 event pairs, 1084 based on Foata normal form. 6/8173 useless extension candidates. Maximal degree in co-relation 41007. Up to 5709 conditions per place. [2024-06-14 14:15:11,988 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 381 selfloop transitions, 129 changer transitions 0/517 dead transitions. [2024-06-14 14:15:11,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 517 transitions, 6501 flow [2024-06-14 14:15:11,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:15:11,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:15:11,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 14:15:11,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-14 14:15:11,989 INFO L175 Difference]: Start difference. First operand has 404 places, 485 transitions, 5383 flow. Second operand 8 states and 193 transitions. [2024-06-14 14:15:11,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 517 transitions, 6501 flow [2024-06-14 14:15:15,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 517 transitions, 6180 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 14:15:15,933 INFO L231 Difference]: Finished difference. Result has 406 places, 485 transitions, 5324 flow [2024-06-14 14:15:15,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5062, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5324, PETRI_PLACES=406, PETRI_TRANSITIONS=485} [2024-06-14 14:15:15,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-14 14:15:15,933 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 485 transitions, 5324 flow [2024-06-14 14:15:15,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:15,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:15,933 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, 1, 1] [2024-06-14 14:15:15,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 14:15:15,933 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:15,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:15,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1280836979, now seen corresponding path program 1 times [2024-06-14 14:15:15,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:15,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483224647] [2024-06-14 14:15:15,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:15,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:16,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:16,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:16,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483224647] [2024-06-14 14:15:16,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483224647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:16,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:16,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:15:16,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048228377] [2024-06-14 14:15:16,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:16,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:15:16,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:16,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:15:16,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:15:16,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:15:16,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 485 transitions, 5324 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:16,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:16,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:15:16,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:18,077 INFO L124 PetriNetUnfolderBase]: 5117/8891 cut-off events. [2024-06-14 14:15:18,077 INFO L125 PetriNetUnfolderBase]: For 1523237/1523237 co-relation queries the response was YES. [2024-06-14 14:15:18,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54332 conditions, 8891 events. 5117/8891 cut-off events. For 1523237/1523237 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 66190 event pairs, 1131 based on Foata normal form. 24/8914 useless extension candidates. Maximal degree in co-relation 54136. Up to 4323 conditions per place. [2024-06-14 14:15:18,200 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 359 selfloop transitions, 167 changer transitions 6/539 dead transitions. [2024-06-14 14:15:18,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 539 transitions, 7316 flow [2024-06-14 14:15:18,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:15:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:15:18,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-14 14:15:18,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-14 14:15:18,201 INFO L175 Difference]: Start difference. First operand has 406 places, 485 transitions, 5324 flow. Second operand 9 states and 232 transitions. [2024-06-14 14:15:18,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 539 transitions, 7316 flow [2024-06-14 14:15:25,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 539 transitions, 7053 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 14:15:25,417 INFO L231 Difference]: Finished difference. Result has 409 places, 485 transitions, 5562 flow [2024-06-14 14:15:25,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5061, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5562, PETRI_PLACES=409, PETRI_TRANSITIONS=485} [2024-06-14 14:15:25,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-14 14:15:25,417 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 485 transitions, 5562 flow [2024-06-14 14:15:25,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:25,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:25,418 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, 1, 1, 1] [2024-06-14 14:15:25,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 14:15:25,418 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:25,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:25,418 INFO L85 PathProgramCache]: Analyzing trace with hash -337496665, now seen corresponding path program 2 times [2024-06-14 14:15:25,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:25,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801048854] [2024-06-14 14:15:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:25,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:25,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:25,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801048854] [2024-06-14 14:15:25,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801048854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:25,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:25,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:15:25,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227008186] [2024-06-14 14:15:25,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:25,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:15:25,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:25,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:15:25,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:15:25,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:15:25,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 485 transitions, 5562 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:25,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:25,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:15:25,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:27,717 INFO L124 PetriNetUnfolderBase]: 5198/8988 cut-off events. [2024-06-14 14:15:27,717 INFO L125 PetriNetUnfolderBase]: For 1758254/1758254 co-relation queries the response was YES. [2024-06-14 14:15:27,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62092 conditions, 8988 events. 5198/8988 cut-off events. For 1758254/1758254 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 66697 event pairs, 1244 based on Foata normal form. 6/8993 useless extension candidates. Maximal degree in co-relation 61894. Up to 4323 conditions per place. [2024-06-14 14:15:27,841 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 350 selfloop transitions, 179 changer transitions 0/536 dead transitions. [2024-06-14 14:15:27,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 536 transitions, 7552 flow [2024-06-14 14:15:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:15:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:15:27,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-14 14:15:27,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-14 14:15:27,842 INFO L175 Difference]: Start difference. First operand has 409 places, 485 transitions, 5562 flow. Second operand 9 states and 232 transitions. [2024-06-14 14:15:27,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 536 transitions, 7552 flow [2024-06-14 14:15:37,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 536 transitions, 7286 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 14:15:37,378 INFO L231 Difference]: Finished difference. Result has 413 places, 487 transitions, 5773 flow [2024-06-14 14:15:37,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5296, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5773, PETRI_PLACES=413, PETRI_TRANSITIONS=487} [2024-06-14 14:15:37,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-14 14:15:37,379 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 487 transitions, 5773 flow [2024-06-14 14:15:37,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:37,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:37,379 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, 1, 1] [2024-06-14 14:15:37,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 14:15:37,379 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:37,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:37,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1154676529, now seen corresponding path program 3 times [2024-06-14 14:15:37,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:37,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476161930] [2024-06-14 14:15:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:37,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:37,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:37,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476161930] [2024-06-14 14:15:37,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476161930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:37,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:37,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:15:37,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263433618] [2024-06-14 14:15:37,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:37,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:15:37,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:37,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:15:37,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:15:37,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:15:37,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 487 transitions, 5773 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:37,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:37,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:15:37,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:39,694 INFO L124 PetriNetUnfolderBase]: 5185/8989 cut-off events. [2024-06-14 14:15:39,694 INFO L125 PetriNetUnfolderBase]: For 1716555/1716555 co-relation queries the response was YES. [2024-06-14 14:15:39,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61409 conditions, 8989 events. 5185/8989 cut-off events. For 1716555/1716555 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 66890 event pairs, 1268 based on Foata normal form. 6/8994 useless extension candidates. Maximal degree in co-relation 61209. Up to 4323 conditions per place. [2024-06-14 14:15:39,823 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 355 selfloop transitions, 172 changer transitions 0/534 dead transitions. [2024-06-14 14:15:39,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 534 transitions, 7700 flow [2024-06-14 14:15:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:15:39,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:15:39,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-14 14:15:39,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2024-06-14 14:15:39,823 INFO L175 Difference]: Start difference. First operand has 413 places, 487 transitions, 5773 flow. Second operand 9 states and 227 transitions. [2024-06-14 14:15:39,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 534 transitions, 7700 flow [2024-06-14 14:15:50,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 534 transitions, 7276 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 14:15:50,031 INFO L231 Difference]: Finished difference. Result has 416 places, 488 transitions, 5748 flow [2024-06-14 14:15:50,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5748, PETRI_PLACES=416, PETRI_TRANSITIONS=488} [2024-06-14 14:15:50,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-14 14:15:50,032 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 488 transitions, 5748 flow [2024-06-14 14:15:50,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:50,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:50,032 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, 1, 1] [2024-06-14 14:15:50,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 14:15:50,032 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:50,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:50,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1302515895, now seen corresponding path program 4 times [2024-06-14 14:15:50,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:50,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126767490] [2024-06-14 14:15:50,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:50,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:50,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:50,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:50,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126767490] [2024-06-14 14:15:50,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126767490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:50,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:50,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:15:50,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208275953] [2024-06-14 14:15:50,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:50,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:15:50,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:50,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:15:50,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:15:50,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:15:50,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 488 transitions, 5748 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:50,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:50,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:15:50,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:52,255 INFO L124 PetriNetUnfolderBase]: 5126/8895 cut-off events. [2024-06-14 14:15:52,255 INFO L125 PetriNetUnfolderBase]: For 1658079/1658079 co-relation queries the response was YES. [2024-06-14 14:15:52,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56043 conditions, 8895 events. 5126/8895 cut-off events. For 1658079/1658079 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 66420 event pairs, 1302 based on Foata normal form. 30/8924 useless extension candidates. Maximal degree in co-relation 55842. Up to 5362 conditions per place. [2024-06-14 14:15:52,551 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 363 selfloop transitions, 155 changer transitions 7/532 dead transitions. [2024-06-14 14:15:52,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 532 transitions, 7322 flow [2024-06-14 14:15:52,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:15:52,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:15:52,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-14 14:15:52,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-14 14:15:52,556 INFO L175 Difference]: Start difference. First operand has 416 places, 488 transitions, 5748 flow. Second operand 8 states and 211 transitions. [2024-06-14 14:15:52,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 532 transitions, 7322 flow [2024-06-14 14:16:00,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 532 transitions, 6952 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 14:16:00,587 INFO L231 Difference]: Finished difference. Result has 418 places, 485 transitions, 5671 flow [2024-06-14 14:16:00,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5378, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5671, PETRI_PLACES=418, PETRI_TRANSITIONS=485} [2024-06-14 14:16:00,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-14 14:16:00,587 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 485 transitions, 5671 flow [2024-06-14 14:16:00,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:00,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:00,587 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, 1, 1] [2024-06-14 14:16:00,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 14:16:00,587 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:00,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:00,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1036492185, now seen corresponding path program 5 times [2024-06-14 14:16:00,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:00,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550027105] [2024-06-14 14:16:00,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:00,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:00,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:00,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550027105] [2024-06-14 14:16:00,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550027105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:00,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:00,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:00,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025339786] [2024-06-14 14:16:00,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:00,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:00,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:00,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:00,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:00,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:00,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 485 transitions, 5671 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:00,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:00,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:00,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:02,766 INFO L124 PetriNetUnfolderBase]: 4907/8508 cut-off events. [2024-06-14 14:16:02,766 INFO L125 PetriNetUnfolderBase]: For 1341211/1341211 co-relation queries the response was YES. [2024-06-14 14:16:02,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49348 conditions, 8508 events. 4907/8508 cut-off events. For 1341211/1341211 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 62878 event pairs, 1430 based on Foata normal form. 34/8541 useless extension candidates. Maximal degree in co-relation 49146. Up to 7212 conditions per place. [2024-06-14 14:16:02,882 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 381 selfloop transitions, 124 changer transitions 1/513 dead transitions. [2024-06-14 14:16:02,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 513 transitions, 6821 flow [2024-06-14 14:16:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:16:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:16:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 14:16:02,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-14 14:16:02,883 INFO L175 Difference]: Start difference. First operand has 418 places, 485 transitions, 5671 flow. Second operand 8 states and 199 transitions. [2024-06-14 14:16:02,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 513 transitions, 6821 flow [2024-06-14 14:16:09,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 513 transitions, 6459 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-14 14:16:09,691 INFO L231 Difference]: Finished difference. Result has 417 places, 485 transitions, 5612 flow [2024-06-14 14:16:09,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5309, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5612, PETRI_PLACES=417, PETRI_TRANSITIONS=485} [2024-06-14 14:16:09,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-14 14:16:09,691 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 485 transitions, 5612 flow [2024-06-14 14:16:09,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:09,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:09,692 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, 1, 1] [2024-06-14 14:16:09,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 14:16:09,692 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:09,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:09,692 INFO L85 PathProgramCache]: Analyzing trace with hash -391984527, now seen corresponding path program 6 times [2024-06-14 14:16:09,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:09,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479952736] [2024-06-14 14:16:09,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:09,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:09,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:09,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479952736] [2024-06-14 14:16:09,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479952736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:09,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:09,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:09,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624199374] [2024-06-14 14:16:09,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:09,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:09,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:09,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:09,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:09,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:09,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 485 transitions, 5612 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:09,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:09,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:09,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:12,040 INFO L124 PetriNetUnfolderBase]: 4985/8660 cut-off events. [2024-06-14 14:16:12,040 INFO L125 PetriNetUnfolderBase]: For 1294033/1294033 co-relation queries the response was YES. [2024-06-14 14:16:12,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49620 conditions, 8660 events. 4985/8660 cut-off events. For 1294033/1294033 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 64391 event pairs, 1420 based on Foata normal form. 30/8689 useless extension candidates. Maximal degree in co-relation 49418. Up to 6952 conditions per place. [2024-06-14 14:16:12,188 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 132 changer transitions 5/519 dead transitions. [2024-06-14 14:16:12,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 519 transitions, 6810 flow [2024-06-14 14:16:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:16:12,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:16:12,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 14:16:12,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-14 14:16:12,189 INFO L175 Difference]: Start difference. First operand has 417 places, 485 transitions, 5612 flow. Second operand 8 states and 203 transitions. [2024-06-14 14:16:12,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 519 transitions, 6810 flow [2024-06-14 14:16:18,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 519 transitions, 6533 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 14:16:18,490 INFO L231 Difference]: Finished difference. Result has 419 places, 483 transitions, 5637 flow [2024-06-14 14:16:18,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5335, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5637, PETRI_PLACES=419, PETRI_TRANSITIONS=483} [2024-06-14 14:16:18,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-14 14:16:18,491 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 483 transitions, 5637 flow [2024-06-14 14:16:18,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:18,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:18,491 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, 1, 1] [2024-06-14 14:16:18,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 14:16:18,492 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:18,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:18,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1491730097, now seen corresponding path program 7 times [2024-06-14 14:16:18,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:18,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104933815] [2024-06-14 14:16:18,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:18,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:18,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:18,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104933815] [2024-06-14 14:16:18,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104933815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:18,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:18,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:18,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584084773] [2024-06-14 14:16:18,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:18,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:18,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:18,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:18,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:18,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:18,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 483 transitions, 5637 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:18,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:18,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:18,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:20,526 INFO L124 PetriNetUnfolderBase]: 4783/8306 cut-off events. [2024-06-14 14:16:20,526 INFO L125 PetriNetUnfolderBase]: For 1043820/1043820 co-relation queries the response was YES. [2024-06-14 14:16:20,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48653 conditions, 8306 events. 4783/8306 cut-off events. For 1043820/1043820 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 61261 event pairs, 1405 based on Foata normal form. 8/8313 useless extension candidates. Maximal degree in co-relation 48450. Up to 7244 conditions per place. [2024-06-14 14:16:20,642 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 139 changer transitions 0/512 dead transitions. [2024-06-14 14:16:20,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 512 transitions, 6785 flow [2024-06-14 14:16:20,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:16:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:16:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-14 14:16:20,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:16:20,643 INFO L175 Difference]: Start difference. First operand has 419 places, 483 transitions, 5637 flow. Second operand 11 states and 252 transitions. [2024-06-14 14:16:20,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 512 transitions, 6785 flow [2024-06-14 14:16:26,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 512 transitions, 6461 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 14:16:26,317 INFO L231 Difference]: Finished difference. Result has 423 places, 484 transitions, 5660 flow [2024-06-14 14:16:26,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5313, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5660, PETRI_PLACES=423, PETRI_TRANSITIONS=484} [2024-06-14 14:16:26,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-14 14:16:26,317 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 484 transitions, 5660 flow [2024-06-14 14:16:26,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:26,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:26,317 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, 1, 1] [2024-06-14 14:16:26,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 14:16:26,317 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:26,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:26,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1594518951, now seen corresponding path program 8 times [2024-06-14 14:16:26,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:26,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374539429] [2024-06-14 14:16:26,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:26,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:26,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:26,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:26,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:26,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374539429] [2024-06-14 14:16:26,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374539429] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:26,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:26,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:26,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195517611] [2024-06-14 14:16:26,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:26,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:26,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:26,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:26,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:26,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:26,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 484 transitions, 5660 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:26,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:26,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:26,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:28,462 INFO L124 PetriNetUnfolderBase]: 4915/8502 cut-off events. [2024-06-14 14:16:28,462 INFO L125 PetriNetUnfolderBase]: For 1280571/1280571 co-relation queries the response was YES. [2024-06-14 14:16:28,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53929 conditions, 8502 events. 4915/8502 cut-off events. For 1280571/1280571 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 62853 event pairs, 1189 based on Foata normal form. 6/8507 useless extension candidates. Maximal degree in co-relation 53726. Up to 6512 conditions per place. [2024-06-14 14:16:28,579 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 328 selfloop transitions, 191 changer transitions 0/526 dead transitions. [2024-06-14 14:16:28,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 526 transitions, 7618 flow [2024-06-14 14:16:28,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:16:28,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:16:28,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-14 14:16:28,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-14 14:16:28,580 INFO L175 Difference]: Start difference. First operand has 423 places, 484 transitions, 5660 flow. Second operand 11 states and 259 transitions. [2024-06-14 14:16:28,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 526 transitions, 7618 flow [2024-06-14 14:16:34,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 526 transitions, 7303 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-14 14:16:34,639 INFO L231 Difference]: Finished difference. Result has 425 places, 487 transitions, 5907 flow [2024-06-14 14:16:34,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5345, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5907, PETRI_PLACES=425, PETRI_TRANSITIONS=487} [2024-06-14 14:16:34,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-14 14:16:34,640 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 487 transitions, 5907 flow [2024-06-14 14:16:34,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:34,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:34,640 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, 1, 1] [2024-06-14 14:16:34,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 14:16:34,641 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:34,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:34,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1682847561, now seen corresponding path program 9 times [2024-06-14 14:16:34,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:34,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540934575] [2024-06-14 14:16:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:34,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:34,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:34,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:34,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540934575] [2024-06-14 14:16:34,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540934575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:34,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:34,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:34,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839223476] [2024-06-14 14:16:34,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:34,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:34,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:34,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:34,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:34,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:34,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 487 transitions, 5907 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:34,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:34,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:34,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:36,808 INFO L124 PetriNetUnfolderBase]: 4902/8479 cut-off events. [2024-06-14 14:16:36,808 INFO L125 PetriNetUnfolderBase]: For 1219511/1219511 co-relation queries the response was YES. [2024-06-14 14:16:36,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53018 conditions, 8479 events. 4902/8479 cut-off events. For 1219511/1219511 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 62549 event pairs, 1426 based on Foata normal form. 6/8484 useless extension candidates. Maximal degree in co-relation 52814. Up to 7261 conditions per place. [2024-06-14 14:16:36,927 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 366 selfloop transitions, 148 changer transitions 0/521 dead transitions. [2024-06-14 14:16:36,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 521 transitions, 7465 flow [2024-06-14 14:16:36,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:16:36,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:16:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-14 14:16:36,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:16:36,928 INFO L175 Difference]: Start difference. First operand has 425 places, 487 transitions, 5907 flow. Second operand 11 states and 253 transitions. [2024-06-14 14:16:36,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 521 transitions, 7465 flow [2024-06-14 14:16:42,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 521 transitions, 7172 flow, removed 61 selfloop flow, removed 6 redundant places. [2024-06-14 14:16:42,761 INFO L231 Difference]: Finished difference. Result has 431 places, 489 transitions, 6074 flow [2024-06-14 14:16:42,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5646, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6074, PETRI_PLACES=431, PETRI_TRANSITIONS=489} [2024-06-14 14:16:42,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-14 14:16:42,762 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 489 transitions, 6074 flow [2024-06-14 14:16:42,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:42,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:42,762 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, 1, 1] [2024-06-14 14:16:42,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 14:16:42,762 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:42,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:42,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1402837907, now seen corresponding path program 10 times [2024-06-14 14:16:42,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:42,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966823560] [2024-06-14 14:16:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:42,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:42,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:42,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966823560] [2024-06-14 14:16:42,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966823560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:42,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:42,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:42,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145659170] [2024-06-14 14:16:42,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:42,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:42,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:42,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:42,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:43,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:43,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 489 transitions, 6074 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:43,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:43,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:43,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:45,040 INFO L124 PetriNetUnfolderBase]: 4889/8464 cut-off events. [2024-06-14 14:16:45,041 INFO L125 PetriNetUnfolderBase]: For 1144501/1144501 co-relation queries the response was YES. [2024-06-14 14:16:45,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51687 conditions, 8464 events. 4889/8464 cut-off events. For 1144501/1144501 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 62613 event pairs, 1163 based on Foata normal form. 6/8469 useless extension candidates. Maximal degree in co-relation 51480. Up to 6500 conditions per place. [2024-06-14 14:16:45,165 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 334 selfloop transitions, 187 changer transitions 0/528 dead transitions. [2024-06-14 14:16:45,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 528 transitions, 7880 flow [2024-06-14 14:16:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:16:45,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:16:45,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-14 14:16:45,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-14 14:16:45,166 INFO L175 Difference]: Start difference. First operand has 431 places, 489 transitions, 6074 flow. Second operand 11 states and 259 transitions. [2024-06-14 14:16:45,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 528 transitions, 7880 flow [2024-06-14 14:16:49,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 528 transitions, 7550 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-14 14:16:49,840 INFO L231 Difference]: Finished difference. Result has 434 places, 489 transitions, 6124 flow [2024-06-14 14:16:49,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5744, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6124, PETRI_PLACES=434, PETRI_TRANSITIONS=489} [2024-06-14 14:16:49,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-14 14:16:49,840 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 489 transitions, 6124 flow [2024-06-14 14:16:49,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:49,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:49,840 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, 1, 1] [2024-06-14 14:16:49,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 14:16:49,841 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:49,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:49,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1881541091, now seen corresponding path program 11 times [2024-06-14 14:16:49,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:49,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732836422] [2024-06-14 14:16:49,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:49,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:49,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:50,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:50,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:50,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732836422] [2024-06-14 14:16:50,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732836422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:50,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:50,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:50,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909492099] [2024-06-14 14:16:50,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:50,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:50,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:50,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:50,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:50,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:50,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 489 transitions, 6124 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:50,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:50,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:50,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:52,088 INFO L124 PetriNetUnfolderBase]: 4871/8450 cut-off events. [2024-06-14 14:16:52,088 INFO L125 PetriNetUnfolderBase]: For 1078991/1078991 co-relation queries the response was YES. [2024-06-14 14:16:52,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50202 conditions, 8450 events. 4871/8450 cut-off events. For 1078991/1078991 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 62534 event pairs, 1275 based on Foata normal form. 8/8457 useless extension candidates. Maximal degree in co-relation 49994. Up to 7072 conditions per place. [2024-06-14 14:16:52,205 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 169 changer transitions 0/525 dead transitions. [2024-06-14 14:16:52,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 525 transitions, 7598 flow [2024-06-14 14:16:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:16:52,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:16:52,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 277 transitions. [2024-06-14 14:16:52,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496031746031746 [2024-06-14 14:16:52,206 INFO L175 Difference]: Start difference. First operand has 434 places, 489 transitions, 6124 flow. Second operand 12 states and 277 transitions. [2024-06-14 14:16:52,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 525 transitions, 7598 flow [2024-06-14 14:16:58,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 525 transitions, 7116 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-14 14:16:58,253 INFO L231 Difference]: Finished difference. Result has 436 places, 489 transitions, 5988 flow [2024-06-14 14:16:58,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5642, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5988, PETRI_PLACES=436, PETRI_TRANSITIONS=489} [2024-06-14 14:16:58,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-14 14:16:58,254 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 489 transitions, 5988 flow [2024-06-14 14:16:58,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:58,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:58,254 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, 1, 1] [2024-06-14 14:16:58,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 14:16:58,254 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:58,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:58,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1878684131, now seen corresponding path program 12 times [2024-06-14 14:16:58,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:58,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54643983] [2024-06-14 14:16:58,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:58,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:58,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:58,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54643983] [2024-06-14 14:16:58,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54643983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:58,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:58,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:16:58,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799918476] [2024-06-14 14:16:58,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:58,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:16:58,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:58,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:16:58,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:16:58,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:16:58,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 489 transitions, 5988 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:58,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:58,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:16:58,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:00,499 INFO L124 PetriNetUnfolderBase]: 4853/8424 cut-off events. [2024-06-14 14:17:00,500 INFO L125 PetriNetUnfolderBase]: For 988686/988686 co-relation queries the response was YES. [2024-06-14 14:17:00,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48021 conditions, 8424 events. 4853/8424 cut-off events. For 988686/988686 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 62383 event pairs, 1421 based on Foata normal form. 8/8431 useless extension candidates. Maximal degree in co-relation 47813. Up to 7364 conditions per place. [2024-06-14 14:17:00,615 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 360 selfloop transitions, 151 changer transitions 0/518 dead transitions. [2024-06-14 14:17:00,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 518 transitions, 7094 flow [2024-06-14 14:17:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:17:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:17:00,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 271 transitions. [2024-06-14 14:17:00,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5376984126984127 [2024-06-14 14:17:00,616 INFO L175 Difference]: Start difference. First operand has 436 places, 489 transitions, 5988 flow. Second operand 12 states and 271 transitions. [2024-06-14 14:17:00,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 518 transitions, 7094 flow [2024-06-14 14:17:06,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 518 transitions, 6572 flow, removed 16 selfloop flow, removed 12 redundant places. [2024-06-14 14:17:06,567 INFO L231 Difference]: Finished difference. Result has 436 places, 489 transitions, 5777 flow [2024-06-14 14:17:06,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5466, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5777, PETRI_PLACES=436, PETRI_TRANSITIONS=489} [2024-06-14 14:17:06,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-14 14:17:06,567 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 489 transitions, 5777 flow [2024-06-14 14:17:06,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:06,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:06,568 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, 1, 1] [2024-06-14 14:17:06,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 14:17:06,568 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:06,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:06,568 INFO L85 PathProgramCache]: Analyzing trace with hash 380949735, now seen corresponding path program 13 times [2024-06-14 14:17:06,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:06,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746032370] [2024-06-14 14:17:06,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:06,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:06,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:06,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746032370] [2024-06-14 14:17:06,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746032370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:06,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:06,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:17:06,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500164121] [2024-06-14 14:17:06,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:06,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:17:06,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:06,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:17:06,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:17:06,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:17:06,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 489 transitions, 5777 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:06,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:06,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:17:06,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:08,865 INFO L124 PetriNetUnfolderBase]: 5101/8841 cut-off events. [2024-06-14 14:17:08,865 INFO L125 PetriNetUnfolderBase]: For 1699320/1699320 co-relation queries the response was YES. [2024-06-14 14:17:08,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54751 conditions, 8841 events. 5101/8841 cut-off events. For 1699320/1699320 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 65901 event pairs, 1494 based on Foata normal form. 30/8870 useless extension candidates. Maximal degree in co-relation 54542. Up to 4665 conditions per place. [2024-06-14 14:17:08,987 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 172 changer transitions 15/540 dead transitions. [2024-06-14 14:17:08,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 540 transitions, 7455 flow [2024-06-14 14:17:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:17:08,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:17:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-14 14:17:08,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-14 14:17:08,988 INFO L175 Difference]: Start difference. First operand has 436 places, 489 transitions, 5777 flow. Second operand 10 states and 250 transitions. [2024-06-14 14:17:08,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 540 transitions, 7455 flow [2024-06-14 14:17:16,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 540 transitions, 7122 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 14:17:16,134 INFO L231 Difference]: Finished difference. Result has 435 places, 481 transitions, 5765 flow [2024-06-14 14:17:16,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5444, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5765, PETRI_PLACES=435, PETRI_TRANSITIONS=481} [2024-06-14 14:17:16,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-14 14:17:16,135 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 481 transitions, 5765 flow [2024-06-14 14:17:16,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:16,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:16,135 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, 1, 1] [2024-06-14 14:17:16,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 14:17:16,135 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:16,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:16,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1079569565, now seen corresponding path program 14 times [2024-06-14 14:17:16,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:16,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163154531] [2024-06-14 14:17:16,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:16,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:16,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:16,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:16,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163154531] [2024-06-14 14:17:16,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163154531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:16,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:16,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:17:16,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713001003] [2024-06-14 14:17:16,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:16,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:17:16,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:16,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:17:16,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:17:16,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:17:16,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 481 transitions, 5765 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:16,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:16,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:17:16,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:18,426 INFO L124 PetriNetUnfolderBase]: 5056/8831 cut-off events. [2024-06-14 14:17:18,426 INFO L125 PetriNetUnfolderBase]: For 2181506/2181506 co-relation queries the response was YES. [2024-06-14 14:17:18,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60975 conditions, 8831 events. 5056/8831 cut-off events. For 2181506/2181506 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 66601 event pairs, 1563 based on Foata normal form. 30/8860 useless extension candidates. Maximal degree in co-relation 60765. Up to 7026 conditions per place. [2024-06-14 14:17:18,560 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 334 selfloop transitions, 179 changer transitions 5/525 dead transitions. [2024-06-14 14:17:18,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 525 transitions, 7387 flow [2024-06-14 14:17:18,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:17:18,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:17:18,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 14:17:18,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:17:18,561 INFO L175 Difference]: Start difference. First operand has 435 places, 481 transitions, 5765 flow. Second operand 10 states and 245 transitions. [2024-06-14 14:17:18,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 525 transitions, 7387 flow [2024-06-14 14:17:28,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 525 transitions, 6970 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-14 14:17:28,075 INFO L231 Difference]: Finished difference. Result has 437 places, 481 transitions, 5812 flow [2024-06-14 14:17:28,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5348, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5812, PETRI_PLACES=437, PETRI_TRANSITIONS=481} [2024-06-14 14:17:28,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-14 14:17:28,076 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 481 transitions, 5812 flow [2024-06-14 14:17:28,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:28,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:28,076 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, 1, 1] [2024-06-14 14:17:28,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 14:17:28,076 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:28,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:28,076 INFO L85 PathProgramCache]: Analyzing trace with hash 2067109695, now seen corresponding path program 15 times [2024-06-14 14:17:28,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:28,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251090649] [2024-06-14 14:17:28,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:28,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:28,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:28,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251090649] [2024-06-14 14:17:28,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251090649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:28,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:28,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:17:28,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564134306] [2024-06-14 14:17:28,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:28,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:17:28,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:28,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:17:28,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:17:28,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:17:28,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 481 transitions, 5812 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:28,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:28,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:17:28,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:30,194 INFO L124 PetriNetUnfolderBase]: 4787/8388 cut-off events. [2024-06-14 14:17:30,194 INFO L125 PetriNetUnfolderBase]: For 1377561/1377561 co-relation queries the response was YES. [2024-06-14 14:17:30,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47870 conditions, 8388 events. 4787/8388 cut-off events. For 1377561/1377561 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 62809 event pairs, 1458 based on Foata normal form. 34/8421 useless extension candidates. Maximal degree in co-relation 47659. Up to 6954 conditions per place. [2024-06-14 14:17:30,320 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 170 changer transitions 10/516 dead transitions. [2024-06-14 14:17:30,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 516 transitions, 6936 flow [2024-06-14 14:17:30,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:17:30,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:17:30,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-14 14:17:30,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-14 14:17:30,320 INFO L175 Difference]: Start difference. First operand has 437 places, 481 transitions, 5812 flow. Second operand 10 states and 238 transitions. [2024-06-14 14:17:30,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 516 transitions, 6936 flow [2024-06-14 14:17:35,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 516 transitions, 6457 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-14 14:17:35,757 INFO L231 Difference]: Finished difference. Result has 439 places, 473 transitions, 5626 flow [2024-06-14 14:17:35,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5333, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5626, PETRI_PLACES=439, PETRI_TRANSITIONS=473} [2024-06-14 14:17:35,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-14 14:17:35,757 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 473 transitions, 5626 flow [2024-06-14 14:17:35,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:35,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:35,757 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, 1, 1] [2024-06-14 14:17:35,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 14:17:35,757 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:35,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:35,758 INFO L85 PathProgramCache]: Analyzing trace with hash 981611357, now seen corresponding path program 16 times [2024-06-14 14:17:35,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:35,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65300710] [2024-06-14 14:17:35,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:35,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:35,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:35,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65300710] [2024-06-14 14:17:35,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65300710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:35,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:35,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:17:35,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916561979] [2024-06-14 14:17:35,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:35,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:17:35,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:35,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:17:35,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:17:35,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:17:35,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 473 transitions, 5626 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:35,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:35,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:17:35,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:37,883 INFO L124 PetriNetUnfolderBase]: 4594/8031 cut-off events. [2024-06-14 14:17:37,883 INFO L125 PetriNetUnfolderBase]: For 1379851/1379851 co-relation queries the response was YES. [2024-06-14 14:17:37,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46318 conditions, 8031 events. 4594/8031 cut-off events. For 1379851/1379851 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 59642 event pairs, 1394 based on Foata normal form. 34/8064 useless extension candidates. Maximal degree in co-relation 46107. Up to 6656 conditions per place. [2024-06-14 14:17:37,991 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 318 selfloop transitions, 179 changer transitions 3/507 dead transitions. [2024-06-14 14:17:37,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 507 transitions, 6784 flow [2024-06-14 14:17:37,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:17:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:17:37,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2024-06-14 14:17:37,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5562770562770563 [2024-06-14 14:17:37,992 INFO L175 Difference]: Start difference. First operand has 439 places, 473 transitions, 5626 flow. Second operand 11 states and 257 transitions. [2024-06-14 14:17:37,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 507 transitions, 6784 flow [2024-06-14 14:17:42,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 507 transitions, 6422 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 14:17:42,966 INFO L231 Difference]: Finished difference. Result has 441 places, 473 transitions, 5679 flow [2024-06-14 14:17:42,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5264, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5679, PETRI_PLACES=441, PETRI_TRANSITIONS=473} [2024-06-14 14:17:42,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-14 14:17:42,967 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 473 transitions, 5679 flow [2024-06-14 14:17:42,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:42,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:42,967 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, 1, 1] [2024-06-14 14:17:42,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 14:17:42,967 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:42,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:42,967 INFO L85 PathProgramCache]: Analyzing trace with hash 610713407, now seen corresponding path program 17 times [2024-06-14 14:17:42,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:42,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101149122] [2024-06-14 14:17:42,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:42,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:43,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:43,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:43,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101149122] [2024-06-14 14:17:43,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101149122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:43,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:43,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:17:43,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262426357] [2024-06-14 14:17:43,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:43,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:17:43,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:43,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:17:43,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:17:43,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:17:43,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 473 transitions, 5679 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:43,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:43,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:17:43,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:45,148 INFO L124 PetriNetUnfolderBase]: 4688/8197 cut-off events. [2024-06-14 14:17:45,148 INFO L125 PetriNetUnfolderBase]: For 1403878/1403878 co-relation queries the response was YES. [2024-06-14 14:17:45,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47318 conditions, 8197 events. 4688/8197 cut-off events. For 1403878/1403878 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 61083 event pairs, 1438 based on Foata normal form. 34/8230 useless extension candidates. Maximal degree in co-relation 47106. Up to 6814 conditions per place. [2024-06-14 14:17:45,264 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 323 selfloop transitions, 174 changer transitions 3/507 dead transitions. [2024-06-14 14:17:45,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 507 transitions, 6839 flow [2024-06-14 14:17:45,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:17:45,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:17:45,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2024-06-14 14:17:45,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5562770562770563 [2024-06-14 14:17:45,265 INFO L175 Difference]: Start difference. First operand has 441 places, 473 transitions, 5679 flow. Second operand 11 states and 257 transitions. [2024-06-14 14:17:45,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 507 transitions, 6839 flow [2024-06-14 14:17:50,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 507 transitions, 6432 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-14 14:17:50,583 INFO L231 Difference]: Finished difference. Result has 443 places, 473 transitions, 5679 flow [2024-06-14 14:17:50,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5272, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5679, PETRI_PLACES=443, PETRI_TRANSITIONS=473} [2024-06-14 14:17:50,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-14 14:17:50,583 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 473 transitions, 5679 flow [2024-06-14 14:17:50,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:50,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:50,583 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, 1, 1] [2024-06-14 14:17:50,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 14:17:50,583 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:50,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:50,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1194076033, now seen corresponding path program 18 times [2024-06-14 14:17:50,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:50,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759661759] [2024-06-14 14:17:50,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:50,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:50,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:50,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759661759] [2024-06-14 14:17:50,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759661759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:50,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:50,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:17:50,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107682080] [2024-06-14 14:17:50,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:50,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:17:50,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:50,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:17:50,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:17:50,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:17:50,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 473 transitions, 5679 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:50,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:50,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:17:50,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:52,805 INFO L124 PetriNetUnfolderBase]: 4766/8337 cut-off events. [2024-06-14 14:17:52,805 INFO L125 PetriNetUnfolderBase]: For 1364577/1364577 co-relation queries the response was YES. [2024-06-14 14:17:52,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47757 conditions, 8337 events. 4766/8337 cut-off events. For 1364577/1364577 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 62411 event pairs, 1426 based on Foata normal form. 30/8366 useless extension candidates. Maximal degree in co-relation 47544. Up to 6358 conditions per place. [2024-06-14 14:17:52,926 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 322 selfloop transitions, 176 changer transitions 8/513 dead transitions. [2024-06-14 14:17:52,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 513 transitions, 6887 flow [2024-06-14 14:17:52,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:17:52,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:17:52,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-14 14:17:52,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-14 14:17:52,927 INFO L175 Difference]: Start difference. First operand has 443 places, 473 transitions, 5679 flow. Second operand 11 states and 261 transitions. [2024-06-14 14:17:52,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 513 transitions, 6887 flow [2024-06-14 14:17:57,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 513 transitions, 6488 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-14 14:17:57,930 INFO L231 Difference]: Finished difference. Result has 445 places, 471 transitions, 5672 flow [2024-06-14 14:17:57,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5280, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5672, PETRI_PLACES=445, PETRI_TRANSITIONS=471} [2024-06-14 14:17:57,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-14 14:17:57,930 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 471 transitions, 5672 flow [2024-06-14 14:17:57,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:57,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:57,930 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, 1, 1] [2024-06-14 14:17:57,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 14:17:57,930 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:57,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:57,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1835991727, now seen corresponding path program 19 times [2024-06-14 14:17:57,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:57,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904914320] [2024-06-14 14:17:57,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:57,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:58,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:58,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904914320] [2024-06-14 14:17:58,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904914320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:58,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:58,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:17:58,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211832282] [2024-06-14 14:17:58,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:58,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:17:58,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:58,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:17:58,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:17:58,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:17:58,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 471 transitions, 5672 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:58,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:58,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:17:58,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:00,069 INFO L124 PetriNetUnfolderBase]: 4722/8278 cut-off events. [2024-06-14 14:18:00,069 INFO L125 PetriNetUnfolderBase]: For 1073795/1073795 co-relation queries the response was YES. [2024-06-14 14:18:00,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47605 conditions, 8278 events. 4722/8278 cut-off events. For 1073795/1073795 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 62017 event pairs, 1492 based on Foata normal form. 8/8284 useless extension candidates. Maximal degree in co-relation 47391. Up to 7018 conditions per place. [2024-06-14 14:18:00,186 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 203 changer transitions 0/496 dead transitions. [2024-06-14 14:18:00,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 496 transitions, 6786 flow [2024-06-14 14:18:00,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:18:00,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:18:00,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-14 14:18:00,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 14:18:00,187 INFO L175 Difference]: Start difference. First operand has 445 places, 471 transitions, 5672 flow. Second operand 10 states and 230 transitions. [2024-06-14 14:18:00,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 496 transitions, 6786 flow [2024-06-14 14:18:06,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 496 transitions, 6366 flow, removed 36 selfloop flow, removed 9 redundant places. [2024-06-14 14:18:06,614 INFO L231 Difference]: Finished difference. Result has 446 places, 472 transitions, 5729 flow [2024-06-14 14:18:06,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5252, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5729, PETRI_PLACES=446, PETRI_TRANSITIONS=472} [2024-06-14 14:18:06,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-14 14:18:06,614 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 472 transitions, 5729 flow [2024-06-14 14:18:06,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:06,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:06,615 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, 1, 1] [2024-06-14 14:18:06,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 14:18:06,615 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:06,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:06,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1519398381, now seen corresponding path program 20 times [2024-06-14 14:18:06,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:06,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496840551] [2024-06-14 14:18:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:06,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:06,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:06,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:06,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496840551] [2024-06-14 14:18:06,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496840551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:06,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:06,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:18:06,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577026930] [2024-06-14 14:18:06,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:06,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:18:06,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:06,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:18:06,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:18:06,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:18:06,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 472 transitions, 5729 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:06,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:06,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:18:06,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:08,924 INFO L124 PetriNetUnfolderBase]: 4750/8326 cut-off events. [2024-06-14 14:18:08,924 INFO L125 PetriNetUnfolderBase]: For 1089488/1089488 co-relation queries the response was YES. [2024-06-14 14:18:09,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47959 conditions, 8326 events. 4750/8326 cut-off events. For 1089488/1089488 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 62458 event pairs, 1498 based on Foata normal form. 8/8332 useless extension candidates. Maximal degree in co-relation 47744. Up to 7062 conditions per place. [2024-06-14 14:18:09,050 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 190 changer transitions 0/498 dead transitions. [2024-06-14 14:18:09,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 498 transitions, 6851 flow [2024-06-14 14:18:09,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:18:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:18:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-14 14:18:09,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-14 14:18:09,061 INFO L175 Difference]: Start difference. First operand has 446 places, 472 transitions, 5729 flow. Second operand 11 states and 247 transitions. [2024-06-14 14:18:09,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 498 transitions, 6851 flow [2024-06-14 14:18:14,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 498 transitions, 6390 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-14 14:18:14,876 INFO L231 Difference]: Finished difference. Result has 449 places, 473 transitions, 5721 flow [2024-06-14 14:18:14,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5721, PETRI_PLACES=449, PETRI_TRANSITIONS=473} [2024-06-14 14:18:14,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-14 14:18:14,876 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 473 transitions, 5721 flow [2024-06-14 14:18:14,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:14,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:14,877 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, 1, 1] [2024-06-14 14:18:14,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 14:18:14,877 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:14,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:14,877 INFO L85 PathProgramCache]: Analyzing trace with hash 637435525, now seen corresponding path program 21 times [2024-06-14 14:18:14,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:14,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156330216] [2024-06-14 14:18:14,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:14,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:14,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:15,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:15,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:15,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156330216] [2024-06-14 14:18:15,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156330216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:15,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:15,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:18:15,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194411774] [2024-06-14 14:18:15,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:15,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:18:15,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:15,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:18:15,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:18:15,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:18:15,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 473 transitions, 5721 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:15,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:15,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:18:15,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:17,020 INFO L124 PetriNetUnfolderBase]: 4803/8399 cut-off events. [2024-06-14 14:18:17,020 INFO L125 PetriNetUnfolderBase]: For 1165304/1165304 co-relation queries the response was YES. [2024-06-14 14:18:17,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49776 conditions, 8399 events. 4803/8399 cut-off events. For 1165304/1165304 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 63014 event pairs, 1497 based on Foata normal form. 6/8403 useless extension candidates. Maximal degree in co-relation 49560. Up to 6969 conditions per place. [2024-06-14 14:18:17,146 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 196 changer transitions 0/504 dead transitions. [2024-06-14 14:18:17,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 504 transitions, 7277 flow [2024-06-14 14:18:17,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:18:17,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:18:17,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-14 14:18:17,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5411255411255411 [2024-06-14 14:18:17,147 INFO L175 Difference]: Start difference. First operand has 449 places, 473 transitions, 5721 flow. Second operand 11 states and 250 transitions. [2024-06-14 14:18:17,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 504 transitions, 7277 flow [2024-06-14 14:18:23,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 504 transitions, 6840 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-14 14:18:23,653 INFO L231 Difference]: Finished difference. Result has 451 places, 475 transitions, 5820 flow [2024-06-14 14:18:23,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5284, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5820, PETRI_PLACES=451, PETRI_TRANSITIONS=475} [2024-06-14 14:18:23,653 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-14 14:18:23,653 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 475 transitions, 5820 flow [2024-06-14 14:18:23,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:23,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:23,653 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, 1, 1] [2024-06-14 14:18:23,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 14:18:23,654 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:23,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:23,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1559484795, now seen corresponding path program 22 times [2024-06-14 14:18:23,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:23,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107866171] [2024-06-14 14:18:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:23,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:23,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:23,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:23,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107866171] [2024-06-14 14:18:23,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107866171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:23,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:23,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:18:23,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643323309] [2024-06-14 14:18:23,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:23,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:18:23,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:23,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:18:23,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:18:23,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-14 14:18:23,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 475 transitions, 5820 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:23,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:23,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-14 14:18:23,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:25,750 INFO L124 PetriNetUnfolderBase]: 4785/8383 cut-off events. [2024-06-14 14:18:25,750 INFO L125 PetriNetUnfolderBase]: For 1083848/1083848 co-relation queries the response was YES. [2024-06-14 14:18:25,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47807 conditions, 8383 events. 4785/8383 cut-off events. For 1083848/1083848 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 62983 event pairs, 1505 based on Foata normal form. 8/8389 useless extension candidates. Maximal degree in co-relation 47590. Up to 7119 conditions per place. [2024-06-14 14:18:25,874 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 300 selfloop transitions, 193 changer transitions 0/500 dead transitions. [2024-06-14 14:18:25,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 500 transitions, 6880 flow [2024-06-14 14:18:25,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:18:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:18:25,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-14 14:18:25,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367965367965368 [2024-06-14 14:18:25,875 INFO L175 Difference]: Start difference. First operand has 451 places, 475 transitions, 5820 flow. Second operand 11 states and 248 transitions. [2024-06-14 14:18:25,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 500 transitions, 6880 flow