./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe011_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/safe011_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe011_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe011_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 16:01:38,263 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:01:38,321 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:01:38,328 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:01:38,329 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:01:38,341 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:01:38,342 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:01:38,342 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:01:38,342 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:01:38,343 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:01:38,343 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:01:38,343 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:01:38,344 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:01:38,344 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:01:38,344 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:01:38,344 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:01:38,345 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:01:38,345 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:01:38,345 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:01:38,346 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:01:38,346 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:01:38,346 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:01:38,347 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:01:38,347 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:01:38,347 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:01:38,347 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:01:38,348 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:01:38,348 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:01:38,348 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:01:38,348 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:01:38,349 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:01:38,349 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:01:38,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:01:38,349 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:01:38,350 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:01:38,350 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:01:38,350 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:01:38,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:01:38,350 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:01:38,351 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:01:38,351 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:01:38,352 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:01:38,352 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:01:38,352 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:01:38,550 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:01:38,572 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:01:38,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:01:38,575 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:01:38,575 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:01:38,576 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe011_tso.i [2024-06-04 16:01:39,559 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:01:39,726 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:01:39,729 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe011_tso.i [2024-06-04 16:01:39,738 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88eea7b01/2ae2262bb9714e63bfa2f171263fdf58/FLAG5a20e420b [2024-06-04 16:01:39,749 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88eea7b01/2ae2262bb9714e63bfa2f171263fdf58 [2024-06-04 16:01:39,752 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:01:39,753 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:01:39,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe011_tso.yml/witness.yml [2024-06-04 16:01:39,826 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:01:39,827 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:01:39,832 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:01:39,832 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:01:39,836 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:01:39,837 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:01:39" (1/2) ... [2024-06-04 16:01:39,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ec1828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:39, skipping insertion in model container [2024-06-04 16:01:39,838 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:01:39" (1/2) ... [2024-06-04 16:01:39,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@daa10af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:01:39, skipping insertion in model container [2024-06-04 16:01:39,839 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:01:39" (2/2) ... [2024-06-04 16:01:39,839 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57ec1828 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:39, skipping insertion in model container [2024-06-04 16:01:39,839 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:01:39" (2/2) ... [2024-06-04 16:01:39,840 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:01:39,874 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:01:39,875 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_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$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$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 <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p2_EAX <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (y == 0 || y == 1)) && ((x == 0 || x == 1) || x == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-04 16:01:39,875 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_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$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$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 <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p2_EAX <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (y == 0 || y == 1)) && ((x == 0 || x == 1) || x == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-04 16:01:39,875 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] ((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_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$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$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 <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p2_EAX <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (y == 0 || y == 1)) && ((x == 0 || x == 1) || x == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-04 16:01:39,875 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:01:39,875 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-06-04 16:01:39,904 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:01:40,158 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:01:40,166 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:01:40,316 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:01:40,345 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:01:40,346 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:40 WrapperNode [2024-06-04 16:01:40,346 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:01:40,347 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:01:40,347 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:01:40,347 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:01:40,352 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 04.06 04:01:40" (1/1) ... [2024-06-04 16:01:40,362 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 04.06 04:01:40" (1/1) ... [2024-06-04 16:01:40,381 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-04 16:01:40,382 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:01:40,382 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:01:40,383 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:01:40,383 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:01:40,391 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:40" (1/1) ... [2024-06-04 16:01:40,391 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:40" (1/1) ... [2024-06-04 16:01:40,394 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:40" (1/1) ... [2024-06-04 16:01:40,414 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]. [2024-06-04 16:01:40,414 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:40" (1/1) ... [2024-06-04 16:01:40,414 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:40" (1/1) ... [2024-06-04 16:01:40,420 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:40" (1/1) ... [2024-06-04 16:01:40,421 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:40" (1/1) ... [2024-06-04 16:01:40,424 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:40" (1/1) ... [2024-06-04 16:01:40,426 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:40" (1/1) ... [2024-06-04 16:01:40,428 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:01:40,428 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:01:40,428 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:01:40,429 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:01:40,429 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:40" (1/1) ... [2024-06-04 16:01:40,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:01:40,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:01:40,457 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) [2024-06-04 16:01:40,476 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 [2024-06-04 16:01:40,490 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:01:40,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:01:40,490 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:01:40,490 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:01:40,490 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:01:40,491 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:01:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:01:40,491 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:01:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:01:40,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:01:40,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:01:40,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:01:40,493 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:01:40,599 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:01:40,600 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:01:40,880 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:01:40,881 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:01:40,955 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:01:40,958 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:01:40,959 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:01:40 BoogieIcfgContainer [2024-06-04 16:01:40,959 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:01:40,961 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:01:40,961 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:01:40,964 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:01:40,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:01:39" (1/4) ... [2024-06-04 16:01:40,965 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcbf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:01:40, skipping insertion in model container [2024-06-04 16:01:40,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:01:39" (2/4) ... [2024-06-04 16:01:40,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcbf5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:01:40, skipping insertion in model container [2024-06-04 16:01:40,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:01:40" (3/4) ... [2024-06-04 16:01:40,966 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dcbf5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:01:40, skipping insertion in model container [2024-06-04 16:01:40,966 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:01:40" (4/4) ... [2024-06-04 16:01:40,968 INFO L112 eAbstractionObserver]: Analyzing ICFG safe011_tso.i [2024-06-04 16:01:40,983 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:01:40,983 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 16:01:40,983 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:01:41,028 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:01:41,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:01:41,085 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-04 16:01:41,085 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:01:41,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 16:01:41,087 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-04 16:01:41,090 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-04 16:01:41,098 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:01:41,104 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;@3f2ac2a1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:01:41,104 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 16:01:41,107 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:01:41,107 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:01:41,107 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:01:41,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:41,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:01:41,111 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)] === [2024-06-04 16:01:41,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:41,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1793314465, now seen corresponding path program 1 times [2024-06-04 16:01:41,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:41,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694508599] [2024-06-04 16:01:41,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:41,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:41,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:41,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694508599] [2024-06-04 16:01:41,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694508599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:41,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:41,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:01:41,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979933930] [2024-06-04 16:01:41,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:41,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:01:41,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:41,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:01:41,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:01:41,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:41,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:41,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:41,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:41,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:41,935 INFO L124 PetriNetUnfolderBase]: 776/1266 cut-off events. [2024-06-04 16:01:41,936 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-04 16:01:41,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2529 conditions, 1266 events. 776/1266 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6275 event pairs, 511 based on Foata normal form. 1/1197 useless extension candidates. Maximal degree in co-relation 2514. Up to 1186 conditions per place. [2024-06-04 16:01:41,948 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-04 16:01:41,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 169 flow [2024-06-04 16:01:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:01:41,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:01:41,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-04 16:01:41,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-04 16:01:41,959 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 80 transitions. [2024-06-04 16:01:41,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 169 flow [2024-06-04 16:01:41,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:41,964 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-04 16:01:41,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-04 16:01:41,968 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-04 16:01:41,968 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-04 16:01:41,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:41,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:41,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:41,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:01:41,969 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)] === [2024-06-04 16:01:41,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:41,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1093279874, now seen corresponding path program 1 times [2024-06-04 16:01:41,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:41,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212760760] [2024-06-04 16:01:41,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:41,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:42,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:42,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212760760] [2024-06-04 16:01:42,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212760760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:42,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:42,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:01:42,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807192715] [2024-06-04 16:01:42,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:42,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:01:42,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:42,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:01:42,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:01:42,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:42,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:42,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:42,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:42,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:42,394 INFO L124 PetriNetUnfolderBase]: 777/1281 cut-off events. [2024-06-04 16:01:42,394 INFO L125 PetriNetUnfolderBase]: For 229/237 co-relation queries the response was YES. [2024-06-04 16:01:42,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2917 conditions, 1281 events. 777/1281 cut-off events. For 229/237 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6324 event pairs, 423 based on Foata normal form. 7/1255 useless extension candidates. Maximal degree in co-relation 2902. Up to 1160 conditions per place. [2024-06-04 16:01:42,402 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 40 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2024-06-04 16:01:42,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 266 flow [2024-06-04 16:01:42,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:42,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 108 transitions. [2024-06-04 16:01:42,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-04 16:01:42,406 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 108 transitions. [2024-06-04 16:01:42,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 266 flow [2024-06-04 16:01:42,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:42,409 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 172 flow [2024-06-04 16:01:42,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-04 16:01:42,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-04 16:01:42,410 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 172 flow [2024-06-04 16:01:42,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:42,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:42,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:42,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:01:42,414 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:42,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:42,415 INFO L85 PathProgramCache]: Analyzing trace with hash 468063438, now seen corresponding path program 1 times [2024-06-04 16:01:42,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:42,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414412682] [2024-06-04 16:01:42,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:42,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:42,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:42,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:42,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:42,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414412682] [2024-06-04 16:01:42,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414412682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:42,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:42,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:42,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119128012] [2024-06-04 16:01:42,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:42,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:42,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:42,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:42,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:42,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:42,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:42,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:42,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:42,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:42,805 INFO L124 PetriNetUnfolderBase]: 815/1352 cut-off events. [2024-06-04 16:01:42,805 INFO L125 PetriNetUnfolderBase]: For 976/982 co-relation queries the response was YES. [2024-06-04 16:01:42,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3623 conditions, 1352 events. 815/1352 cut-off events. For 976/982 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6690 event pairs, 249 based on Foata normal form. 11/1353 useless extension candidates. Maximal degree in co-relation 3605. Up to 1090 conditions per place. [2024-06-04 16:01:42,813 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 57 selfloop transitions, 21 changer transitions 0/85 dead transitions. [2024-06-04 16:01:42,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 85 transitions, 474 flow [2024-06-04 16:01:42,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:42,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 141 transitions. [2024-06-04 16:01:42,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6878048780487804 [2024-06-04 16:01:42,815 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 172 flow. Second operand 5 states and 141 transitions. [2024-06-04 16:01:42,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 85 transitions, 474 flow [2024-06-04 16:01:42,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 85 transitions, 470 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:42,818 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 314 flow [2024-06-04 16:01:42,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2024-06-04 16:01:42,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-04 16:01:42,819 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 314 flow [2024-06-04 16:01:42,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:42,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:42,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:42,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:01:42,820 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)] === [2024-06-04 16:01:42,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:42,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1162563891, now seen corresponding path program 1 times [2024-06-04 16:01:42,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:42,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593975882] [2024-06-04 16:01:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:42,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:42,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:43,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:43,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:43,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593975882] [2024-06-04 16:01:43,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593975882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:43,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:43,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:43,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855550396] [2024-06-04 16:01:43,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:43,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:43,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:43,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:43,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:43,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 314 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) [2024-06-04 16:01:43,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:43,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:43,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:43,250 INFO L124 PetriNetUnfolderBase]: 903/1500 cut-off events. [2024-06-04 16:01:43,251 INFO L125 PetriNetUnfolderBase]: For 2582/2597 co-relation queries the response was YES. [2024-06-04 16:01:43,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4990 conditions, 1500 events. 903/1500 cut-off events. For 2582/2597 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7595 event pairs, 167 based on Foata normal form. 36/1526 useless extension candidates. Maximal degree in co-relation 4967. Up to 1094 conditions per place. [2024-06-04 16:01:43,259 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 64 selfloop transitions, 24 changer transitions 0/95 dead transitions. [2024-06-04 16:01:43,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 95 transitions, 638 flow [2024-06-04 16:01:43,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:43,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:43,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-04 16:01:43,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2024-06-04 16:01:43,261 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 314 flow. Second operand 6 states and 165 transitions. [2024-06-04 16:01:43,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 95 transitions, 638 flow [2024-06-04 16:01:43,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 95 transitions, 626 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:43,266 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 379 flow [2024-06-04 16:01:43,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=379, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2024-06-04 16:01:43,267 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-04 16:01:43,267 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 379 flow [2024-06-04 16:01:43,267 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) [2024-06-04 16:01:43,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:43,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:43,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:01:43,268 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)] === [2024-06-04 16:01:43,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:43,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1976063819, now seen corresponding path program 1 times [2024-06-04 16:01:43,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:43,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276117096] [2024-06-04 16:01:43,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:43,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:43,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:43,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:43,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276117096] [2024-06-04 16:01:43,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276117096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:43,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:43,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:01:43,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966599234] [2024-06-04 16:01:43,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:43,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:01:43,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:43,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:01:43,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:01:43,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:43,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 379 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) [2024-06-04 16:01:43,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:43,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:43,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:43,652 INFO L124 PetriNetUnfolderBase]: 898/1486 cut-off events. [2024-06-04 16:01:43,652 INFO L125 PetriNetUnfolderBase]: For 3295/3317 co-relation queries the response was YES. [2024-06-04 16:01:43,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5454 conditions, 1486 events. 898/1486 cut-off events. For 3295/3317 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7576 event pairs, 292 based on Foata normal form. 11/1495 useless extension candidates. Maximal degree in co-relation 5428. Up to 1369 conditions per place. [2024-06-04 16:01:43,662 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 59 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2024-06-04 16:01:43,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 73 transitions, 570 flow [2024-06-04 16:01:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:43,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:43,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-04 16:01:43,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-04 16:01:43,664 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 379 flow. Second operand 4 states and 99 transitions. [2024-06-04 16:01:43,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 73 transitions, 570 flow [2024-06-04 16:01:43,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 73 transitions, 511 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:43,672 INFO L231 Difference]: Finished difference. Result has 58 places, 62 transitions, 379 flow [2024-06-04 16:01:43,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=379, PETRI_PLACES=58, PETRI_TRANSITIONS=62} [2024-06-04 16:01:43,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-04 16:01:43,674 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 62 transitions, 379 flow [2024-06-04 16:01:43,676 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) [2024-06-04 16:01:43,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:43,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:43,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:01:43,676 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)] === [2024-06-04 16:01:43,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1129415895, now seen corresponding path program 1 times [2024-06-04 16:01:43,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:43,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871424131] [2024-06-04 16:01:43,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:43,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:43,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:43,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871424131] [2024-06-04 16:01:43,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871424131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:43,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:43,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:43,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722596090] [2024-06-04 16:01:43,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:43,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:43,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:43,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:43,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:43,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:43,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 62 transitions, 379 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:43,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:43,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:43,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:44,071 INFO L124 PetriNetUnfolderBase]: 1064/1755 cut-off events. [2024-06-04 16:01:44,071 INFO L125 PetriNetUnfolderBase]: For 3954/3954 co-relation queries the response was YES. [2024-06-04 16:01:44,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6107 conditions, 1755 events. 1064/1755 cut-off events. For 3954/3954 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9083 event pairs, 373 based on Foata normal form. 2/1756 useless extension candidates. Maximal degree in co-relation 6080. Up to 1602 conditions per place. [2024-06-04 16:01:44,082 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 70 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-04 16:01:44,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 86 transitions, 636 flow [2024-06-04 16:01:44,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:44,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:44,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-04 16:01:44,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-04 16:01:44,083 INFO L175 Difference]: Start difference. First operand has 58 places, 62 transitions, 379 flow. Second operand 5 states and 116 transitions. [2024-06-04 16:01:44,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 86 transitions, 636 flow [2024-06-04 16:01:44,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 603 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:44,088 INFO L231 Difference]: Finished difference. Result has 63 places, 71 transitions, 455 flow [2024-06-04 16:01:44,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=455, PETRI_PLACES=63, PETRI_TRANSITIONS=71} [2024-06-04 16:01:44,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-04 16:01:44,089 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 71 transitions, 455 flow [2024-06-04 16:01:44,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:44,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:44,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:44,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:01:44,090 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)] === [2024-06-04 16:01:44,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:44,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1572161422, now seen corresponding path program 1 times [2024-06-04 16:01:44,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:44,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136403900] [2024-06-04 16:01:44,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:44,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:44,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:44,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:44,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136403900] [2024-06-04 16:01:44,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136403900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:44,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:44,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:44,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903333060] [2024-06-04 16:01:44,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:44,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:44,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:44,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:44,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:44,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:44,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 71 transitions, 455 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) [2024-06-04 16:01:44,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:44,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:44,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:44,532 INFO L124 PetriNetUnfolderBase]: 1000/1640 cut-off events. [2024-06-04 16:01:44,533 INFO L125 PetriNetUnfolderBase]: For 5366/5415 co-relation queries the response was YES. [2024-06-04 16:01:44,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6339 conditions, 1640 events. 1000/1640 cut-off events. For 5366/5415 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8322 event pairs, 303 based on Foata normal form. 16/1637 useless extension candidates. Maximal degree in co-relation 6309. Up to 1359 conditions per place. [2024-06-04 16:01:44,544 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 29 changer transitions 0/98 dead transitions. [2024-06-04 16:01:44,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 98 transitions, 765 flow [2024-06-04 16:01:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:44,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-04 16:01:44,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-04 16:01:44,546 INFO L175 Difference]: Start difference. First operand has 63 places, 71 transitions, 455 flow. Second operand 5 states and 135 transitions. [2024-06-04 16:01:44,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 98 transitions, 765 flow [2024-06-04 16:01:44,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 98 transitions, 761 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:01:44,551 INFO L231 Difference]: Finished difference. Result has 68 places, 75 transitions, 552 flow [2024-06-04 16:01:44,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=552, PETRI_PLACES=68, PETRI_TRANSITIONS=75} [2024-06-04 16:01:44,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-04 16:01:44,553 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 75 transitions, 552 flow [2024-06-04 16:01:44,553 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) [2024-06-04 16:01:44,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:44,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:44,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:01:44,553 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)] === [2024-06-04 16:01:44,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:44,554 INFO L85 PathProgramCache]: Analyzing trace with hash -724896376, now seen corresponding path program 2 times [2024-06-04 16:01:44,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:44,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703181345] [2024-06-04 16:01:44,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:44,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:44,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:44,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:44,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:44,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703181345] [2024-06-04 16:01:44,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703181345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:44,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:44,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:01:44,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2593365] [2024-06-04 16:01:44,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:44,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:01:44,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:44,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:01:44,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:01:44,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:44,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 75 transitions, 552 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) [2024-06-04 16:01:44,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:44,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:44,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:44,953 INFO L124 PetriNetUnfolderBase]: 1017/1665 cut-off events. [2024-06-04 16:01:44,953 INFO L125 PetriNetUnfolderBase]: For 6504/6554 co-relation queries the response was YES. [2024-06-04 16:01:44,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6826 conditions, 1665 events. 1017/1665 cut-off events. For 6504/6554 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8564 event pairs, 316 based on Foata normal form. 24/1670 useless extension candidates. Maximal degree in co-relation 6793. Up to 1381 conditions per place. [2024-06-04 16:01:44,964 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 55 selfloop transitions, 32 changer transitions 0/97 dead transitions. [2024-06-04 16:01:44,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 97 transitions, 837 flow [2024-06-04 16:01:44,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:44,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-04 16:01:44,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-04 16:01:44,965 INFO L175 Difference]: Start difference. First operand has 68 places, 75 transitions, 552 flow. Second operand 5 states and 130 transitions. [2024-06-04 16:01:44,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 97 transitions, 837 flow [2024-06-04 16:01:44,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 97 transitions, 788 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:44,971 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 661 flow [2024-06-04 16:01:44,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=661, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2024-06-04 16:01:44,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-04 16:01:44,972 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 661 flow [2024-06-04 16:01:44,972 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) [2024-06-04 16:01:44,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:44,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:44,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:01:44,973 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)] === [2024-06-04 16:01:44,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:44,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1386459562, now seen corresponding path program 1 times [2024-06-04 16:01:44,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:44,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582179609] [2024-06-04 16:01:44,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:44,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:45,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:45,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582179609] [2024-06-04 16:01:45,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582179609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:45,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:45,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:45,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770760921] [2024-06-04 16:01:45,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:45,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:45,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:45,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:45,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:45,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:45,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 661 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:45,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:45,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:45,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:45,421 INFO L124 PetriNetUnfolderBase]: 1087/1789 cut-off events. [2024-06-04 16:01:45,421 INFO L125 PetriNetUnfolderBase]: For 7906/7906 co-relation queries the response was YES. [2024-06-04 16:01:45,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7442 conditions, 1789 events. 1087/1789 cut-off events. For 7906/7906 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9166 event pairs, 320 based on Foata normal form. 4/1791 useless extension candidates. Maximal degree in co-relation 7406. Up to 1505 conditions per place. [2024-06-04 16:01:45,439 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 95 selfloop transitions, 22 changer transitions 0/123 dead transitions. [2024-06-04 16:01:45,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 123 transitions, 1141 flow [2024-06-04 16:01:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:01:45,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-04 16:01:45,441 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 661 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:01:45,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 123 transitions, 1141 flow [2024-06-04 16:01:45,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 123 transitions, 1039 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:45,454 INFO L231 Difference]: Finished difference. Result has 77 places, 94 transitions, 765 flow [2024-06-04 16:01:45,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=765, PETRI_PLACES=77, PETRI_TRANSITIONS=94} [2024-06-04 16:01:45,455 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-04 16:01:45,455 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 94 transitions, 765 flow [2024-06-04 16:01:45,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:45,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:45,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:45,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:01:45,455 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)] === [2024-06-04 16:01:45,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:45,456 INFO L85 PathProgramCache]: Analyzing trace with hash -996950606, now seen corresponding path program 2 times [2024-06-04 16:01:45,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:45,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47679582] [2024-06-04 16:01:45,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:45,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:45,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:45,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:45,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47679582] [2024-06-04 16:01:45,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47679582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:45,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:45,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:45,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093209773] [2024-06-04 16:01:45,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:45,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:45,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:45,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:45,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:45,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:45,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 94 transitions, 765 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:45,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:45,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:45,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:45,876 INFO L124 PetriNetUnfolderBase]: 1098/1801 cut-off events. [2024-06-04 16:01:45,876 INFO L125 PetriNetUnfolderBase]: For 9408/9412 co-relation queries the response was YES. [2024-06-04 16:01:45,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7908 conditions, 1801 events. 1098/1801 cut-off events. For 9408/9412 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9154 event pairs, 334 based on Foata normal form. 3/1801 useless extension candidates. Maximal degree in co-relation 7869. Up to 1512 conditions per place. [2024-06-04 16:01:45,888 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 29 changer transitions 0/127 dead transitions. [2024-06-04 16:01:45,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 127 transitions, 1213 flow [2024-06-04 16:01:45,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:01:45,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-04 16:01:45,890 INFO L175 Difference]: Start difference. First operand has 77 places, 94 transitions, 765 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:01:45,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 127 transitions, 1213 flow [2024-06-04 16:01:45,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 1175 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:45,902 INFO L231 Difference]: Finished difference. Result has 82 places, 102 transitions, 869 flow [2024-06-04 16:01:45,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=869, PETRI_PLACES=82, PETRI_TRANSITIONS=102} [2024-06-04 16:01:45,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-04 16:01:45,905 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 102 transitions, 869 flow [2024-06-04 16:01:45,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:45,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:45,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:45,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:01:45,906 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)] === [2024-06-04 16:01:45,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:45,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1258061128, now seen corresponding path program 3 times [2024-06-04 16:01:45,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:45,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928641358] [2024-06-04 16:01:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:45,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:46,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:46,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928641358] [2024-06-04 16:01:46,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928641358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:46,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:46,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:46,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274057909] [2024-06-04 16:01:46,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:46,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:46,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:46,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:46,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:46,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:46,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 102 transitions, 869 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:46,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:46,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:46,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:46,384 INFO L124 PetriNetUnfolderBase]: 1093/1794 cut-off events. [2024-06-04 16:01:46,384 INFO L125 PetriNetUnfolderBase]: For 10838/10842 co-relation queries the response was YES. [2024-06-04 16:01:46,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8106 conditions, 1794 events. 1093/1794 cut-off events. For 10838/10842 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9156 event pairs, 334 based on Foata normal form. 3/1794 useless extension candidates. Maximal degree in co-relation 8065. Up to 1509 conditions per place. [2024-06-04 16:01:46,396 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 89 selfloop transitions, 31 changer transitions 0/126 dead transitions. [2024-06-04 16:01:46,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 126 transitions, 1224 flow [2024-06-04 16:01:46,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:46,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-04 16:01:46,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-04 16:01:46,398 INFO L175 Difference]: Start difference. First operand has 82 places, 102 transitions, 869 flow. Second operand 6 states and 146 transitions. [2024-06-04 16:01:46,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 126 transitions, 1224 flow [2024-06-04 16:01:46,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1191 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-04 16:01:46,415 INFO L231 Difference]: Finished difference. Result has 87 places, 103 transitions, 914 flow [2024-06-04 16:01:46,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=914, PETRI_PLACES=87, PETRI_TRANSITIONS=103} [2024-06-04 16:01:46,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-04 16:01:46,416 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 103 transitions, 914 flow [2024-06-04 16:01:46,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:46,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:46,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:46,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:01:46,417 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:46,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:46,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1258070056, now seen corresponding path program 1 times [2024-06-04 16:01:46,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:46,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101017786] [2024-06-04 16:01:46,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:46,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:46,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:46,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:46,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101017786] [2024-06-04 16:01:46,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101017786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:46,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:46,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:46,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072839246] [2024-06-04 16:01:46,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:46,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:46,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:46,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:46,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:46,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:46,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 103 transitions, 914 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:46,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:46,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:46,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:46,829 INFO L124 PetriNetUnfolderBase]: 1085/1784 cut-off events. [2024-06-04 16:01:46,830 INFO L125 PetriNetUnfolderBase]: For 11940/11940 co-relation queries the response was YES. [2024-06-04 16:01:46,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8260 conditions, 1784 events. 1085/1784 cut-off events. For 11940/11940 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9061 event pairs, 298 based on Foata normal form. 4/1787 useless extension candidates. Maximal degree in co-relation 8216. Up to 1612 conditions per place. [2024-06-04 16:01:46,841 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 107 selfloop transitions, 12 changer transitions 0/125 dead transitions. [2024-06-04 16:01:46,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 125 transitions, 1214 flow [2024-06-04 16:01:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:46,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-04 16:01:46,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-04 16:01:46,842 INFO L175 Difference]: Start difference. First operand has 87 places, 103 transitions, 914 flow. Second operand 6 states and 136 transitions. [2024-06-04 16:01:46,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 125 transitions, 1214 flow [2024-06-04 16:01:46,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 125 transitions, 1166 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:46,855 INFO L231 Difference]: Finished difference. Result has 90 places, 105 transitions, 913 flow [2024-06-04 16:01:46,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=866, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=913, PETRI_PLACES=90, PETRI_TRANSITIONS=105} [2024-06-04 16:01:46,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-04 16:01:46,856 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 105 transitions, 913 flow [2024-06-04 16:01:46,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:46,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:46,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:46,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:01:46,857 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)] === [2024-06-04 16:01:46,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:46,857 INFO L85 PathProgramCache]: Analyzing trace with hash 981374124, now seen corresponding path program 1 times [2024-06-04 16:01:46,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:46,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266843143] [2024-06-04 16:01:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:46,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:47,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:47,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266843143] [2024-06-04 16:01:47,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266843143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:47,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:47,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:47,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130509443] [2024-06-04 16:01:47,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:47,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:47,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:47,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:47,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:47,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 105 transitions, 913 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:47,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:47,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:47,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:47,221 INFO L124 PetriNetUnfolderBase]: 1096/1805 cut-off events. [2024-06-04 16:01:47,222 INFO L125 PetriNetUnfolderBase]: For 13319/13319 co-relation queries the response was YES. [2024-06-04 16:01:47,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8483 conditions, 1805 events. 1096/1805 cut-off events. For 13319/13319 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9252 event pairs, 316 based on Foata normal form. 2/1805 useless extension candidates. Maximal degree in co-relation 8438. Up to 1509 conditions per place. [2024-06-04 16:01:47,233 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 98 selfloop transitions, 34 changer transitions 0/138 dead transitions. [2024-06-04 16:01:47,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 138 transitions, 1340 flow [2024-06-04 16:01:47,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:47,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:47,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 16:01:47,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-04 16:01:47,234 INFO L175 Difference]: Start difference. First operand has 90 places, 105 transitions, 913 flow. Second operand 6 states and 151 transitions. [2024-06-04 16:01:47,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 138 transitions, 1340 flow [2024-06-04 16:01:47,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 138 transitions, 1311 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:47,246 INFO L231 Difference]: Finished difference. Result has 94 places, 111 transitions, 1044 flow [2024-06-04 16:01:47,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1044, PETRI_PLACES=94, PETRI_TRANSITIONS=111} [2024-06-04 16:01:47,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-04 16:01:47,247 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 111 transitions, 1044 flow [2024-06-04 16:01:47,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:47,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:47,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:47,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:01:47,248 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)] === [2024-06-04 16:01:47,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash 981379704, now seen corresponding path program 2 times [2024-06-04 16:01:47,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:47,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988325698] [2024-06-04 16:01:47,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:47,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:47,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:47,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:47,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988325698] [2024-06-04 16:01:47,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988325698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:47,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:47,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:47,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367563726] [2024-06-04 16:01:47,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:47,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:47,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:47,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:47,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:47,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:47,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 111 transitions, 1044 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:47,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:47,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:47,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:47,630 INFO L124 PetriNetUnfolderBase]: 1107/1826 cut-off events. [2024-06-04 16:01:47,630 INFO L125 PetriNetUnfolderBase]: For 15139/15139 co-relation queries the response was YES. [2024-06-04 16:01:47,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8941 conditions, 1826 events. 1107/1826 cut-off events. For 15139/15139 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9343 event pairs, 316 based on Foata normal form. 2/1826 useless extension candidates. Maximal degree in co-relation 8893. Up to 1521 conditions per place. [2024-06-04 16:01:47,643 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 98 selfloop transitions, 34 changer transitions 0/138 dead transitions. [2024-06-04 16:01:47,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 138 transitions, 1454 flow [2024-06-04 16:01:47,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:47,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:01:47,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:01:47,644 INFO L175 Difference]: Start difference. First operand has 94 places, 111 transitions, 1044 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:01:47,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 138 transitions, 1454 flow [2024-06-04 16:01:47,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 138 transitions, 1416 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:47,662 INFO L231 Difference]: Finished difference. Result has 98 places, 114 transitions, 1117 flow [2024-06-04 16:01:47,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1009, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1117, PETRI_PLACES=98, PETRI_TRANSITIONS=114} [2024-06-04 16:01:47,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-04 16:01:47,662 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 114 transitions, 1117 flow [2024-06-04 16:01:47,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:47,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:47,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:47,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:01:47,663 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)] === [2024-06-04 16:01:47,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:47,664 INFO L85 PathProgramCache]: Analyzing trace with hash -517847364, now seen corresponding path program 3 times [2024-06-04 16:01:47,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:47,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218608034] [2024-06-04 16:01:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:47,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:47,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:47,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218608034] [2024-06-04 16:01:47,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218608034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:47,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:47,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:47,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115335527] [2024-06-04 16:01:47,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:47,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:47,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:47,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:47,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:47,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:47,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 114 transitions, 1117 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:47,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:47,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:47,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:48,103 INFO L124 PetriNetUnfolderBase]: 1102/1821 cut-off events. [2024-06-04 16:01:48,103 INFO L125 PetriNetUnfolderBase]: For 17492/17498 co-relation queries the response was YES. [2024-06-04 16:01:48,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9042 conditions, 1821 events. 1102/1821 cut-off events. For 17492/17498 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9380 event pairs, 342 based on Foata normal form. 5/1824 useless extension candidates. Maximal degree in co-relation 8993. Up to 1516 conditions per place. [2024-06-04 16:01:48,117 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 95 selfloop transitions, 33 changer transitions 0/134 dead transitions. [2024-06-04 16:01:48,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 134 transitions, 1432 flow [2024-06-04 16:01:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:48,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:48,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 16:01:48,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-04 16:01:48,119 INFO L175 Difference]: Start difference. First operand has 98 places, 114 transitions, 1117 flow. Second operand 6 states and 141 transitions. [2024-06-04 16:01:48,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 134 transitions, 1432 flow [2024-06-04 16:01:48,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 134 transitions, 1378 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:48,138 INFO L231 Difference]: Finished difference. Result has 101 places, 115 transitions, 1148 flow [2024-06-04 16:01:48,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1148, PETRI_PLACES=101, PETRI_TRANSITIONS=115} [2024-06-04 16:01:48,139 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-04 16:01:48,139 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 115 transitions, 1148 flow [2024-06-04 16:01:48,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:48,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:48,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:48,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:01:48,140 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)] === [2024-06-04 16:01:48,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:48,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1079765045, now seen corresponding path program 1 times [2024-06-04 16:01:48,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:48,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169910114] [2024-06-04 16:01:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:48,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:48,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:48,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:48,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169910114] [2024-06-04 16:01:48,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169910114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:48,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:48,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:48,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912772556] [2024-06-04 16:01:48,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:48,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:48,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:48,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:48,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:48,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:48,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 115 transitions, 1148 flow. Second operand has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:48,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:48,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:48,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:48,570 INFO L124 PetriNetUnfolderBase]: 1078/1765 cut-off events. [2024-06-04 16:01:48,570 INFO L125 PetriNetUnfolderBase]: For 17863/17869 co-relation queries the response was YES. [2024-06-04 16:01:48,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8945 conditions, 1765 events. 1078/1765 cut-off events. For 17863/17869 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8935 event pairs, 314 based on Foata normal form. 8/1772 useless extension candidates. Maximal degree in co-relation 8895. Up to 1603 conditions per place. [2024-06-04 16:01:48,580 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 103 selfloop transitions, 14 changer transitions 0/123 dead transitions. [2024-06-04 16:01:48,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 123 transitions, 1402 flow [2024-06-04 16:01:48,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:01:48,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:01:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-04 16:01:48,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:01:48,581 INFO L175 Difference]: Start difference. First operand has 101 places, 115 transitions, 1148 flow. Second operand 4 states and 96 transitions. [2024-06-04 16:01:48,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 123 transitions, 1402 flow [2024-06-04 16:01:48,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 123 transitions, 1351 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:48,598 INFO L231 Difference]: Finished difference. Result has 102 places, 115 transitions, 1133 flow [2024-06-04 16:01:48,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1133, PETRI_PLACES=102, PETRI_TRANSITIONS=115} [2024-06-04 16:01:48,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-04 16:01:48,599 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 115 transitions, 1133 flow [2024-06-04 16:01:48,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.333333333333334) internal successors, (92), 6 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:48,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:48,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:48,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:01:48,600 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)] === [2024-06-04 16:01:48,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:48,600 INFO L85 PathProgramCache]: Analyzing trace with hash 943025127, now seen corresponding path program 1 times [2024-06-04 16:01:48,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:48,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482114530] [2024-06-04 16:01:48,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:48,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:48,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:48,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482114530] [2024-06-04 16:01:48,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482114530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:48,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:48,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:48,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855809327] [2024-06-04 16:01:48,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:48,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:48,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:48,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:48,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:48,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:48,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 115 transitions, 1133 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:48,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:48,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:48,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:49,035 INFO L124 PetriNetUnfolderBase]: 1201/1971 cut-off events. [2024-06-04 16:01:49,036 INFO L125 PetriNetUnfolderBase]: For 26087/26095 co-relation queries the response was YES. [2024-06-04 16:01:49,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10141 conditions, 1971 events. 1201/1971 cut-off events. For 26087/26095 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10410 event pairs, 207 based on Foata normal form. 20/1935 useless extension candidates. Maximal degree in co-relation 10089. Up to 1241 conditions per place. [2024-06-04 16:01:49,049 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 91 selfloop transitions, 43 changer transitions 0/155 dead transitions. [2024-06-04 16:01:49,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 155 transitions, 1665 flow [2024-06-04 16:01:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:49,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:49,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-04 16:01:49,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6626016260162602 [2024-06-04 16:01:49,050 INFO L175 Difference]: Start difference. First operand has 102 places, 115 transitions, 1133 flow. Second operand 6 states and 163 transitions. [2024-06-04 16:01:49,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 155 transitions, 1665 flow [2024-06-04 16:01:49,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 155 transitions, 1629 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:49,074 INFO L231 Difference]: Finished difference. Result has 106 places, 121 transitions, 1279 flow [2024-06-04 16:01:49,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1279, PETRI_PLACES=106, PETRI_TRANSITIONS=121} [2024-06-04 16:01:49,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-04 16:01:49,075 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 121 transitions, 1279 flow [2024-06-04 16:01:49,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:49,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:49,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:49,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:01:49,075 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)] === [2024-06-04 16:01:49,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:49,076 INFO L85 PathProgramCache]: Analyzing trace with hash 242531243, now seen corresponding path program 2 times [2024-06-04 16:01:49,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:49,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774357601] [2024-06-04 16:01:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:49,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:49,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:49,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774357601] [2024-06-04 16:01:49,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774357601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:49,248 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:49,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:01:49,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345660860] [2024-06-04 16:01:49,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:49,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:01:49,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:49,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:01:49,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:01:49,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-04 16:01:49,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 121 transitions, 1279 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:49,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:49,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-04 16:01:49,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:49,513 INFO L124 PetriNetUnfolderBase]: 1212/1982 cut-off events. [2024-06-04 16:01:49,513 INFO L125 PetriNetUnfolderBase]: For 29845/29860 co-relation queries the response was YES. [2024-06-04 16:01:49,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10921 conditions, 1982 events. 1212/1982 cut-off events. For 29845/29860 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10462 event pairs, 310 based on Foata normal form. 18/1943 useless extension candidates. Maximal degree in co-relation 10868. Up to 1586 conditions per place. [2024-06-04 16:01:49,528 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 86 selfloop transitions, 43 changer transitions 0/150 dead transitions. [2024-06-04 16:01:49,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1668 flow [2024-06-04 16:01:49,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:01:49,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:01:49,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-04 16:01:49,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-04 16:01:49,530 INFO L175 Difference]: Start difference. First operand has 106 places, 121 transitions, 1279 flow. Second operand 6 states and 158 transitions. [2024-06-04 16:01:49,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1668 flow [2024-06-04 16:01:49,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 150 transitions, 1600 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:49,561 INFO L231 Difference]: Finished difference. Result has 110 places, 123 transitions, 1334 flow [2024-06-04 16:01:49,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1334, PETRI_PLACES=110, PETRI_TRANSITIONS=123} [2024-06-04 16:01:49,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-04 16:01:49,561 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 123 transitions, 1334 flow [2024-06-04 16:01:49,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:49,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:49,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:49,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:01:49,562 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)] === [2024-06-04 16:01:49,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:49,562 INFO L85 PathProgramCache]: Analyzing trace with hash -336249, now seen corresponding path program 1 times [2024-06-04 16:01:49,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:49,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767608335] [2024-06-04 16:01:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:49,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:49,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:49,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767608335] [2024-06-04 16:01:49,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767608335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:49,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:49,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:49,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057124643] [2024-06-04 16:01:49,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:49,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:49,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:49,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:49,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:49,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:49,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 1334 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:49,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:49,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:49,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:50,097 INFO L124 PetriNetUnfolderBase]: 1339/2182 cut-off events. [2024-06-04 16:01:50,097 INFO L125 PetriNetUnfolderBase]: For 31036/31036 co-relation queries the response was YES. [2024-06-04 16:01:50,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11812 conditions, 2182 events. 1339/2182 cut-off events. For 31036/31036 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11530 event pairs, 348 based on Foata normal form. 20/2200 useless extension candidates. Maximal degree in co-relation 11757. Up to 1783 conditions per place. [2024-06-04 16:01:50,113 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 112 selfloop transitions, 37 changer transitions 0/155 dead transitions. [2024-06-04 16:01:50,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 155 transitions, 1736 flow [2024-06-04 16:01:50,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:50,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:50,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:01:50,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-04 16:01:50,116 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 1334 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:01:50,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 155 transitions, 1736 flow [2024-06-04 16:01:50,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 155 transitions, 1632 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:50,144 INFO L231 Difference]: Finished difference. Result has 113 places, 125 transitions, 1338 flow [2024-06-04 16:01:50,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1338, PETRI_PLACES=113, PETRI_TRANSITIONS=125} [2024-06-04 16:01:50,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-04 16:01:50,145 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 125 transitions, 1338 flow [2024-06-04 16:01:50,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:50,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:50,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:50,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:01:50,146 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)] === [2024-06-04 16:01:50,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:50,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1126608259, now seen corresponding path program 2 times [2024-06-04 16:01:50,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:50,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827818514] [2024-06-04 16:01:50,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:50,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:50,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:50,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:50,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827818514] [2024-06-04 16:01:50,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827818514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:50,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:50,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:50,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001206585] [2024-06-04 16:01:50,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:50,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:50,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:50,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:50,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:50,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:50,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 125 transitions, 1338 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:50,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:50,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:50,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:50,660 INFO L124 PetriNetUnfolderBase]: 1356/2199 cut-off events. [2024-06-04 16:01:50,661 INFO L125 PetriNetUnfolderBase]: For 31621/31625 co-relation queries the response was YES. [2024-06-04 16:01:50,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12118 conditions, 2199 events. 1356/2199 cut-off events. For 31621/31625 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11565 event pairs, 379 based on Foata normal form. 5/2199 useless extension candidates. Maximal degree in co-relation 12062. Up to 1902 conditions per place. [2024-06-04 16:01:50,675 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 104 selfloop transitions, 41 changer transitions 0/151 dead transitions. [2024-06-04 16:01:50,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 151 transitions, 1714 flow [2024-06-04 16:01:50,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:50,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:50,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:01:50,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:01:50,677 INFO L175 Difference]: Start difference. First operand has 113 places, 125 transitions, 1338 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:01:50,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 151 transitions, 1714 flow [2024-06-04 16:01:50,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 151 transitions, 1628 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:50,708 INFO L231 Difference]: Finished difference. Result has 115 places, 127 transitions, 1371 flow [2024-06-04 16:01:50,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1371, PETRI_PLACES=115, PETRI_TRANSITIONS=127} [2024-06-04 16:01:50,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 73 predicate places. [2024-06-04 16:01:50,709 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 127 transitions, 1371 flow [2024-06-04 16:01:50,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:50,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:50,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:50,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:01:50,710 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:50,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:50,710 INFO L85 PathProgramCache]: Analyzing trace with hash 2119523975, now seen corresponding path program 3 times [2024-06-04 16:01:50,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:50,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369157016] [2024-06-04 16:01:50,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:50,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:50,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:50,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:50,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:50,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369157016] [2024-06-04 16:01:50,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369157016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:50,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:50,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:50,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575484364] [2024-06-04 16:01:50,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:50,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:50,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:50,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:50,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:50,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:50,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 127 transitions, 1371 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:50,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:50,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:50,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:51,216 INFO L124 PetriNetUnfolderBase]: 1373/2234 cut-off events. [2024-06-04 16:01:51,216 INFO L125 PetriNetUnfolderBase]: For 34603/34607 co-relation queries the response was YES. [2024-06-04 16:01:51,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12476 conditions, 2234 events. 1373/2234 cut-off events. For 34603/34607 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11814 event pairs, 338 based on Foata normal form. 5/2234 useless extension candidates. Maximal degree in co-relation 12419. Up to 1754 conditions per place. [2024-06-04 16:01:51,233 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 107 selfloop transitions, 48 changer transitions 0/161 dead transitions. [2024-06-04 16:01:51,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 161 transitions, 1899 flow [2024-06-04 16:01:51,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:51,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:51,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:01:51,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-04 16:01:51,234 INFO L175 Difference]: Start difference. First operand has 115 places, 127 transitions, 1371 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:01:51,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 161 transitions, 1899 flow [2024-06-04 16:01:51,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 161 transitions, 1798 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 16:01:51,271 INFO L231 Difference]: Finished difference. Result has 117 places, 131 transitions, 1437 flow [2024-06-04 16:01:51,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1437, PETRI_PLACES=117, PETRI_TRANSITIONS=131} [2024-06-04 16:01:51,271 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-04 16:01:51,271 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 131 transitions, 1437 flow [2024-06-04 16:01:51,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:51,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:51,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:51,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:01:51,272 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)] === [2024-06-04 16:01:51,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:51,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1883051945, now seen corresponding path program 4 times [2024-06-04 16:01:51,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:51,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588393118] [2024-06-04 16:01:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:51,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:51,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:51,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:51,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588393118] [2024-06-04 16:01:51,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588393118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:51,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:51,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:51,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351328582] [2024-06-04 16:01:51,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:51,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:51,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:51,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:51,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:51,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:51,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 131 transitions, 1437 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:51,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:51,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:51,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:51,766 INFO L124 PetriNetUnfolderBase]: 1365/2222 cut-off events. [2024-06-04 16:01:51,767 INFO L125 PetriNetUnfolderBase]: For 36533/36537 co-relation queries the response was YES. [2024-06-04 16:01:51,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12546 conditions, 2222 events. 1365/2222 cut-off events. For 36533/36537 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11761 event pairs, 377 based on Foata normal form. 5/2222 useless extension candidates. Maximal degree in co-relation 12488. Up to 1917 conditions per place. [2024-06-04 16:01:51,783 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 109 selfloop transitions, 40 changer transitions 0/155 dead transitions. [2024-06-04 16:01:51,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 155 transitions, 1795 flow [2024-06-04 16:01:51,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:51,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:01:51,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:01:51,784 INFO L175 Difference]: Start difference. First operand has 117 places, 131 transitions, 1437 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:01:51,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 155 transitions, 1795 flow [2024-06-04 16:01:51,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 155 transitions, 1677 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:51,821 INFO L231 Difference]: Finished difference. Result has 120 places, 131 transitions, 1406 flow [2024-06-04 16:01:51,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1406, PETRI_PLACES=120, PETRI_TRANSITIONS=131} [2024-06-04 16:01:51,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-04 16:01:51,822 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 131 transitions, 1406 flow [2024-06-04 16:01:51,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:51,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:51,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:51,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:01:51,823 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)] === [2024-06-04 16:01:51,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:51,823 INFO L85 PathProgramCache]: Analyzing trace with hash 813746065, now seen corresponding path program 1 times [2024-06-04 16:01:51,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:51,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466560075] [2024-06-04 16:01:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:51,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:51,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:51,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466560075] [2024-06-04 16:01:51,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466560075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:51,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:51,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:51,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421340577] [2024-06-04 16:01:51,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:51,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:51,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:51,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:51,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:52,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:52,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 131 transitions, 1406 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:52,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:52,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:52,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:52,355 INFO L124 PetriNetUnfolderBase]: 1467/2426 cut-off events. [2024-06-04 16:01:52,355 INFO L125 PetriNetUnfolderBase]: For 42903/42903 co-relation queries the response was YES. [2024-06-04 16:01:52,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13313 conditions, 2426 events. 1467/2426 cut-off events. For 42903/42903 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13295 event pairs, 291 based on Foata normal form. 12/2436 useless extension candidates. Maximal degree in co-relation 13254. Up to 1607 conditions per place. [2024-06-04 16:01:52,373 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 130 selfloop transitions, 38 changer transitions 0/174 dead transitions. [2024-06-04 16:01:52,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 174 transitions, 1997 flow [2024-06-04 16:01:52,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:52,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:52,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 16:01:52,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-04 16:01:52,375 INFO L175 Difference]: Start difference. First operand has 120 places, 131 transitions, 1406 flow. Second operand 7 states and 172 transitions. [2024-06-04 16:01:52,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 174 transitions, 1997 flow [2024-06-04 16:01:52,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 174 transitions, 1895 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:52,417 INFO L231 Difference]: Finished difference. Result has 123 places, 136 transitions, 1465 flow [2024-06-04 16:01:52,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1465, PETRI_PLACES=123, PETRI_TRANSITIONS=136} [2024-06-04 16:01:52,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-04 16:01:52,418 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 136 transitions, 1465 flow [2024-06-04 16:01:52,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:52,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:52,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:52,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:01:52,419 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)] === [2024-06-04 16:01:52,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:52,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1598281925, now seen corresponding path program 2 times [2024-06-04 16:01:52,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:52,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107305302] [2024-06-04 16:01:52,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:52,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:52,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:52,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107305302] [2024-06-04 16:01:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107305302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:52,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:52,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:52,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617428746] [2024-06-04 16:01:52,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:52,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:52,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:52,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:52,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:52,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:52,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 136 transitions, 1465 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:52,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:52,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:52,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:52,921 INFO L124 PetriNetUnfolderBase]: 1508/2507 cut-off events. [2024-06-04 16:01:52,921 INFO L125 PetriNetUnfolderBase]: For 46667/46667 co-relation queries the response was YES. [2024-06-04 16:01:52,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13875 conditions, 2507 events. 1508/2507 cut-off events. For 46667/46667 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13978 event pairs, 379 based on Foata normal form. 12/2517 useless extension candidates. Maximal degree in co-relation 13813. Up to 1983 conditions per place. [2024-06-04 16:01:52,937 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 127 selfloop transitions, 39 changer transitions 0/172 dead transitions. [2024-06-04 16:01:52,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 172 transitions, 1928 flow [2024-06-04 16:01:52,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:52,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:52,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:01:52,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 16:01:52,939 INFO L175 Difference]: Start difference. First operand has 123 places, 136 transitions, 1465 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:01:52,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 172 transitions, 1928 flow [2024-06-04 16:01:52,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 172 transitions, 1873 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:52,985 INFO L231 Difference]: Finished difference. Result has 129 places, 139 transitions, 1544 flow [2024-06-04 16:01:52,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1544, PETRI_PLACES=129, PETRI_TRANSITIONS=139} [2024-06-04 16:01:52,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-04 16:01:52,986 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 139 transitions, 1544 flow [2024-06-04 16:01:52,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:52,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:52,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:52,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:01:52,986 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)] === [2024-06-04 16:01:52,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:52,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1792406515, now seen corresponding path program 3 times [2024-06-04 16:01:52,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:52,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323115356] [2024-06-04 16:01:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:52,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:53,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:53,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323115356] [2024-06-04 16:01:53,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323115356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:53,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:53,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:53,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992448983] [2024-06-04 16:01:53,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:53,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:53,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:53,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:53,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:53,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:53,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 139 transitions, 1544 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:53,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:53,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:53,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:53,470 INFO L124 PetriNetUnfolderBase]: 1610/2691 cut-off events. [2024-06-04 16:01:53,470 INFO L125 PetriNetUnfolderBase]: For 54482/54482 co-relation queries the response was YES. [2024-06-04 16:01:53,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15173 conditions, 2691 events. 1610/2691 cut-off events. For 54482/54482 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15357 event pairs, 344 based on Foata normal form. 12/2701 useless extension candidates. Maximal degree in co-relation 15108. Up to 2089 conditions per place. [2024-06-04 16:01:53,487 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 133 selfloop transitions, 41 changer transitions 0/180 dead transitions. [2024-06-04 16:01:53,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 180 transitions, 2133 flow [2024-06-04 16:01:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:01:53,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-04 16:01:53,489 INFO L175 Difference]: Start difference. First operand has 129 places, 139 transitions, 1544 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:01:53,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 180 transitions, 2133 flow [2024-06-04 16:01:53,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 180 transitions, 2080 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:53,539 INFO L231 Difference]: Finished difference. Result has 134 places, 142 transitions, 1636 flow [2024-06-04 16:01:53,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1636, PETRI_PLACES=134, PETRI_TRANSITIONS=142} [2024-06-04 16:01:53,539 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-04 16:01:53,540 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 142 transitions, 1636 flow [2024-06-04 16:01:53,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:53,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:53,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:53,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:01:53,540 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)] === [2024-06-04 16:01:53,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:53,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1792258645, now seen corresponding path program 4 times [2024-06-04 16:01:53,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:53,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873567490] [2024-06-04 16:01:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:53,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:53,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:53,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:53,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:53,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873567490] [2024-06-04 16:01:53,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873567490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:53,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:53,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:53,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258326203] [2024-06-04 16:01:53,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:53,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:53,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:53,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:53,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 142 transitions, 1636 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:53,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:53,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:53,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:54,101 INFO L124 PetriNetUnfolderBase]: 1668/2789 cut-off events. [2024-06-04 16:01:54,101 INFO L125 PetriNetUnfolderBase]: For 60560/60560 co-relation queries the response was YES. [2024-06-04 16:01:54,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15979 conditions, 2789 events. 1668/2789 cut-off events. For 60560/60560 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 16141 event pairs, 449 based on Foata normal form. 16/2803 useless extension candidates. Maximal degree in co-relation 15911. Up to 2360 conditions per place. [2024-06-04 16:01:54,119 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 39 changer transitions 0/176 dead transitions. [2024-06-04 16:01:54,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 176 transitions, 2086 flow [2024-06-04 16:01:54,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:54,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:54,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:01:54,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 16:01:54,123 INFO L175 Difference]: Start difference. First operand has 134 places, 142 transitions, 1636 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:01:54,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 176 transitions, 2086 flow [2024-06-04 16:01:54,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 176 transitions, 2021 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:54,178 INFO L231 Difference]: Finished difference. Result has 138 places, 143 transitions, 1678 flow [2024-06-04 16:01:54,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1575, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1678, PETRI_PLACES=138, PETRI_TRANSITIONS=143} [2024-06-04 16:01:54,179 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-04 16:01:54,179 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 143 transitions, 1678 flow [2024-06-04 16:01:54,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:54,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:54,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:54,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:01:54,179 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)] === [2024-06-04 16:01:54,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:54,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1786896265, now seen corresponding path program 5 times [2024-06-04 16:01:54,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:54,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659652564] [2024-06-04 16:01:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:54,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:54,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:54,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:54,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:54,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659652564] [2024-06-04 16:01:54,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659652564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:54,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:54,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:54,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798186932] [2024-06-04 16:01:54,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:54,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:54,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:54,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:54,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:54,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 143 transitions, 1678 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:54,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:54,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:54,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:54,776 INFO L124 PetriNetUnfolderBase]: 1726/2887 cut-off events. [2024-06-04 16:01:54,776 INFO L125 PetriNetUnfolderBase]: For 64518/64518 co-relation queries the response was YES. [2024-06-04 16:01:54,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16545 conditions, 2887 events. 1726/2887 cut-off events. For 64518/64518 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16855 event pairs, 459 based on Foata normal form. 16/2901 useless extension candidates. Maximal degree in co-relation 16475. Up to 2458 conditions per place. [2024-06-04 16:01:54,793 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 132 selfloop transitions, 36 changer transitions 0/174 dead transitions. [2024-06-04 16:01:54,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 174 transitions, 2114 flow [2024-06-04 16:01:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:54,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:54,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:01:54,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-04 16:01:54,794 INFO L175 Difference]: Start difference. First operand has 138 places, 143 transitions, 1678 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:01:54,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 174 transitions, 2114 flow [2024-06-04 16:01:54,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 174 transitions, 2049 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:54,880 INFO L231 Difference]: Finished difference. Result has 141 places, 144 transitions, 1712 flow [2024-06-04 16:01:54,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1613, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1712, PETRI_PLACES=141, PETRI_TRANSITIONS=144} [2024-06-04 16:01:54,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-04 16:01:54,881 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 144 transitions, 1712 flow [2024-06-04 16:01:54,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:54,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:54,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:54,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:01:54,882 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:54,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:54,882 INFO L85 PathProgramCache]: Analyzing trace with hash 883066351, now seen corresponding path program 1 times [2024-06-04 16:01:54,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:54,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130317250] [2024-06-04 16:01:54,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:54,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:55,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:55,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130317250] [2024-06-04 16:01:55,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130317250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:55,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:55,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:55,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135929940] [2024-06-04 16:01:55,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:55,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:55,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:55,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:55,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:55,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:55,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 144 transitions, 1712 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:55,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:55,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:55,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:55,441 INFO L124 PetriNetUnfolderBase]: 1767/2968 cut-off events. [2024-06-04 16:01:55,441 INFO L125 PetriNetUnfolderBase]: For 68102/68102 co-relation queries the response was YES. [2024-06-04 16:01:55,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17013 conditions, 2968 events. 1767/2968 cut-off events. For 68102/68102 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17561 event pairs, 455 based on Foata normal form. 12/2978 useless extension candidates. Maximal degree in co-relation 16942. Up to 2230 conditions per place. [2024-06-04 16:01:55,462 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 132 selfloop transitions, 40 changer transitions 0/178 dead transitions. [2024-06-04 16:01:55,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 178 transitions, 2167 flow [2024-06-04 16:01:55,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:55,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:55,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:01:55,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-04 16:01:55,464 INFO L175 Difference]: Start difference. First operand has 141 places, 144 transitions, 1712 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:01:55,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 178 transitions, 2167 flow [2024-06-04 16:01:55,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 178 transitions, 2107 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:55,529 INFO L231 Difference]: Finished difference. Result has 144 places, 145 transitions, 1760 flow [2024-06-04 16:01:55,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1652, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1760, PETRI_PLACES=144, PETRI_TRANSITIONS=145} [2024-06-04 16:01:55,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-04 16:01:55,530 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 145 transitions, 1760 flow [2024-06-04 16:01:55,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:55,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:55,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:55,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:01:55,530 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:55,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:55,531 INFO L85 PathProgramCache]: Analyzing trace with hash -262329761, now seen corresponding path program 6 times [2024-06-04 16:01:55,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:55,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269283764] [2024-06-04 16:01:55,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:55,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:55,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:55,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269283764] [2024-06-04 16:01:55,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269283764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:55,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:55,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:55,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814769633] [2024-06-04 16:01:55,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:55,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:55,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:55,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:55,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:55,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:55,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 145 transitions, 1760 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:55,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:55,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:55,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:56,100 INFO L124 PetriNetUnfolderBase]: 1739/2926 cut-off events. [2024-06-04 16:01:56,100 INFO L125 PetriNetUnfolderBase]: For 69116/69122 co-relation queries the response was YES. [2024-06-04 16:01:56,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16593 conditions, 2926 events. 1739/2926 cut-off events. For 69116/69122 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17329 event pairs, 484 based on Foata normal form. 19/2943 useless extension candidates. Maximal degree in co-relation 16521. Up to 2485 conditions per place. [2024-06-04 16:01:56,121 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 133 selfloop transitions, 34 changer transitions 0/173 dead transitions. [2024-06-04 16:01:56,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 173 transitions, 2188 flow [2024-06-04 16:01:56,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:56,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:56,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:01:56,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-04 16:01:56,122 INFO L175 Difference]: Start difference. First operand has 144 places, 145 transitions, 1760 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:01:56,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 173 transitions, 2188 flow [2024-06-04 16:01:56,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 173 transitions, 2070 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:56,203 INFO L231 Difference]: Finished difference. Result has 145 places, 146 transitions, 1739 flow [2024-06-04 16:01:56,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1648, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1739, PETRI_PLACES=145, PETRI_TRANSITIONS=146} [2024-06-04 16:01:56,204 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-04 16:01:56,204 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 146 transitions, 1739 flow [2024-06-04 16:01:56,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:56,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:56,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:56,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:01:56,205 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:56,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:56,205 INFO L85 PathProgramCache]: Analyzing trace with hash 565118045, now seen corresponding path program 2 times [2024-06-04 16:01:56,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:56,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820547823] [2024-06-04 16:01:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:56,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:56,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:56,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820547823] [2024-06-04 16:01:56,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820547823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:56,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:56,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:56,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343058585] [2024-06-04 16:01:56,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:56,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:56,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:56,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:56,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:56,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:56,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 146 transitions, 1739 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:56,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:56,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:56,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:56,782 INFO L124 PetriNetUnfolderBase]: 1719/2894 cut-off events. [2024-06-04 16:01:56,782 INFO L125 PetriNetUnfolderBase]: For 65033/65039 co-relation queries the response was YES. [2024-06-04 16:01:56,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16056 conditions, 2894 events. 1719/2894 cut-off events. For 65033/65039 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17094 event pairs, 455 based on Foata normal form. 15/2907 useless extension candidates. Maximal degree in co-relation 15983. Up to 2366 conditions per place. [2024-06-04 16:01:56,803 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 134 selfloop transitions, 36 changer transitions 0/176 dead transitions. [2024-06-04 16:01:56,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 176 transitions, 2163 flow [2024-06-04 16:01:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:56,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:01:56,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-04 16:01:56,805 INFO L175 Difference]: Start difference. First operand has 145 places, 146 transitions, 1739 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:01:56,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 176 transitions, 2163 flow [2024-06-04 16:01:56,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 176 transitions, 2105 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-04 16:01:56,886 INFO L231 Difference]: Finished difference. Result has 148 places, 146 transitions, 1759 flow [2024-06-04 16:01:56,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1681, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1759, PETRI_PLACES=148, PETRI_TRANSITIONS=146} [2024-06-04 16:01:56,886 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-04 16:01:56,886 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 146 transitions, 1759 flow [2024-06-04 16:01:56,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:56,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:56,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:56,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:01:56,887 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)] === [2024-06-04 16:01:56,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:56,887 INFO L85 PathProgramCache]: Analyzing trace with hash 830815325, now seen corresponding path program 3 times [2024-06-04 16:01:56,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:56,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102744417] [2024-06-04 16:01:56,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:56,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:56,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:57,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:57,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102744417] [2024-06-04 16:01:57,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102744417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:57,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:57,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:57,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697243689] [2024-06-04 16:01:57,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:57,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:57,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:57,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:57,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:57,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:57,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 146 transitions, 1759 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:57,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:57,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:57,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:57,455 INFO L124 PetriNetUnfolderBase]: 1699/2862 cut-off events. [2024-06-04 16:01:57,455 INFO L125 PetriNetUnfolderBase]: For 63869/63875 co-relation queries the response was YES. [2024-06-04 16:01:57,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15712 conditions, 2862 events. 1699/2862 cut-off events. For 63869/63875 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 16764 event pairs, 400 based on Foata normal form. 15/2875 useless extension candidates. Maximal degree in co-relation 15637. Up to 1833 conditions per place. [2024-06-04 16:01:57,481 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 126 selfloop transitions, 44 changer transitions 0/176 dead transitions. [2024-06-04 16:01:57,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 176 transitions, 2125 flow [2024-06-04 16:01:57,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:01:57,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:01:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 16:01:57,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-04 16:01:57,482 INFO L175 Difference]: Start difference. First operand has 148 places, 146 transitions, 1759 flow. Second operand 7 states and 165 transitions. [2024-06-04 16:01:57,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 176 transitions, 2125 flow [2024-06-04 16:01:57,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 176 transitions, 1964 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:01:57,556 INFO L231 Difference]: Finished difference. Result has 146 places, 145 transitions, 1630 flow [2024-06-04 16:01:57,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1630, PETRI_PLACES=146, PETRI_TRANSITIONS=145} [2024-06-04 16:01:57,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-04 16:01:57,557 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 145 transitions, 1630 flow [2024-06-04 16:01:57,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:57,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:57,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:57,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:01:57,557 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:57,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:57,558 INFO L85 PathProgramCache]: Analyzing trace with hash 26943536, now seen corresponding path program 1 times [2024-06-04 16:01:57,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:57,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063599665] [2024-06-04 16:01:57,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:57,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:57,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:57,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:57,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063599665] [2024-06-04 16:01:57,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063599665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:57,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:57,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:57,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717637321] [2024-06-04 16:01:57,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:57,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:57,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:57,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:57,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:57,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:57,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 145 transitions, 1630 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:57,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:57,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:57,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:58,161 INFO L124 PetriNetUnfolderBase]: 1717/2889 cut-off events. [2024-06-04 16:01:58,162 INFO L125 PetriNetUnfolderBase]: For 61050/61050 co-relation queries the response was YES. [2024-06-04 16:01:58,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15677 conditions, 2889 events. 1717/2889 cut-off events. For 61050/61050 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 16999 event pairs, 421 based on Foata normal form. 1/2889 useless extension candidates. Maximal degree in co-relation 15603. Up to 2667 conditions per place. [2024-06-04 16:01:58,182 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 148 selfloop transitions, 19 changer transitions 0/173 dead transitions. [2024-06-04 16:01:58,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 173 transitions, 2165 flow [2024-06-04 16:01:58,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:01:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:01:58,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-04 16:01:58,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-04 16:01:58,183 INFO L175 Difference]: Start difference. First operand has 146 places, 145 transitions, 1630 flow. Second operand 8 states and 166 transitions. [2024-06-04 16:01:58,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 173 transitions, 2165 flow [2024-06-04 16:01:58,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 173 transitions, 2040 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-04 16:01:58,254 INFO L231 Difference]: Finished difference. Result has 149 places, 154 transitions, 1658 flow [2024-06-04 16:01:58,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1658, PETRI_PLACES=149, PETRI_TRANSITIONS=154} [2024-06-04 16:01:58,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-04 16:01:58,255 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 154 transitions, 1658 flow [2024-06-04 16:01:58,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:58,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:58,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:58,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:01:58,255 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:58,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:58,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1550533644, now seen corresponding path program 1 times [2024-06-04 16:01:58,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:58,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557073243] [2024-06-04 16:01:58,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:58,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:58,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:58,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557073243] [2024-06-04 16:01:58,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557073243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:58,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:58,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:58,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162710520] [2024-06-04 16:01:58,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:58,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:58,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:58,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:58,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:58,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:58,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 154 transitions, 1658 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:58,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:58,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:58,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:58,821 INFO L124 PetriNetUnfolderBase]: 1732/2905 cut-off events. [2024-06-04 16:01:58,821 INFO L125 PetriNetUnfolderBase]: For 65603/65607 co-relation queries the response was YES. [2024-06-04 16:01:58,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15686 conditions, 2905 events. 1732/2905 cut-off events. For 65603/65607 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 17026 event pairs, 445 based on Foata normal form. 4/2906 useless extension candidates. Maximal degree in co-relation 15611. Up to 2522 conditions per place. [2024-06-04 16:01:58,842 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 120 selfloop transitions, 47 changer transitions 0/173 dead transitions. [2024-06-04 16:01:58,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 173 transitions, 2201 flow [2024-06-04 16:01:58,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:58,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-04 16:01:58,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-04 16:01:58,843 INFO L175 Difference]: Start difference. First operand has 149 places, 154 transitions, 1658 flow. Second operand 5 states and 124 transitions. [2024-06-04 16:01:58,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 173 transitions, 2201 flow [2024-06-04 16:01:58,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 173 transitions, 2151 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 16:01:58,952 INFO L231 Difference]: Finished difference. Result has 151 places, 159 transitions, 1762 flow [2024-06-04 16:01:58,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1608, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1762, PETRI_PLACES=151, PETRI_TRANSITIONS=159} [2024-06-04 16:01:58,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-04 16:01:58,952 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 159 transitions, 1762 flow [2024-06-04 16:01:58,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:58,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:58,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:58,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:01:58,953 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:01:58,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:58,953 INFO L85 PathProgramCache]: Analyzing trace with hash 484360834, now seen corresponding path program 2 times [2024-06-04 16:01:58,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:58,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365008732] [2024-06-04 16:01:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:58,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:58,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:59,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:59,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:59,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365008732] [2024-06-04 16:01:59,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365008732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:59,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:59,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:01:59,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469138904] [2024-06-04 16:01:59,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:59,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:01:59,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:59,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:01:59,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:01:59,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:59,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 159 transitions, 1762 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:59,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:59,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:59,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:01:59,519 INFO L124 PetriNetUnfolderBase]: 1726/2916 cut-off events. [2024-06-04 16:01:59,519 INFO L125 PetriNetUnfolderBase]: For 67735/67735 co-relation queries the response was YES. [2024-06-04 16:01:59,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15886 conditions, 2916 events. 1726/2916 cut-off events. For 67735/67735 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 17189 event pairs, 419 based on Foata normal form. 2/2917 useless extension candidates. Maximal degree in co-relation 15809. Up to 2675 conditions per place. [2024-06-04 16:01:59,540 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 148 selfloop transitions, 23 changer transitions 0/177 dead transitions. [2024-06-04 16:01:59,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 177 transitions, 2180 flow [2024-06-04 16:01:59,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:01:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:01:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-04 16:01:59,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-06-04 16:01:59,542 INFO L175 Difference]: Start difference. First operand has 151 places, 159 transitions, 1762 flow. Second operand 5 states and 117 transitions. [2024-06-04 16:01:59,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 177 transitions, 2180 flow [2024-06-04 16:01:59,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 177 transitions, 2101 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-04 16:01:59,670 INFO L231 Difference]: Finished difference. Result has 154 places, 162 transitions, 1787 flow [2024-06-04 16:01:59,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1683, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1787, PETRI_PLACES=154, PETRI_TRANSITIONS=162} [2024-06-04 16:01:59,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-04 16:01:59,671 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 162 transitions, 1787 flow [2024-06-04 16:01:59,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:59,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:01:59,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:01:59,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:01:59,671 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)] === [2024-06-04 16:01:59,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:01:59,672 INFO L85 PathProgramCache]: Analyzing trace with hash 199335496, now seen corresponding path program 2 times [2024-06-04 16:01:59,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:01:59,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968337989] [2024-06-04 16:01:59,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:01:59,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:01:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:01:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:01:59,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:01:59,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968337989] [2024-06-04 16:01:59,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968337989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:01:59,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:01:59,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:01:59,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883673858] [2024-06-04 16:01:59,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:01:59,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:01:59,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:01:59,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:01:59,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:01:59,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:01:59,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 162 transitions, 1787 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:01:59,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:01:59,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:01:59,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:00,217 INFO L124 PetriNetUnfolderBase]: 1705/2884 cut-off events. [2024-06-04 16:02:00,218 INFO L125 PetriNetUnfolderBase]: For 71519/71525 co-relation queries the response was YES. [2024-06-04 16:02:00,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15822 conditions, 2884 events. 1705/2884 cut-off events. For 71519/71525 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17043 event pairs, 463 based on Foata normal form. 6/2888 useless extension candidates. Maximal degree in co-relation 15744. Up to 2487 conditions per place. [2024-06-04 16:02:00,239 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 125 selfloop transitions, 41 changer transitions 0/172 dead transitions. [2024-06-04 16:02:00,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 172 transitions, 2211 flow [2024-06-04 16:02:00,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:00,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-04 16:02:00,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-04 16:02:00,241 INFO L175 Difference]: Start difference. First operand has 154 places, 162 transitions, 1787 flow. Second operand 5 states and 119 transitions. [2024-06-04 16:02:00,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 172 transitions, 2211 flow [2024-06-04 16:02:00,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 172 transitions, 2147 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:00,331 INFO L231 Difference]: Finished difference. Result has 156 places, 162 transitions, 1816 flow [2024-06-04 16:02:00,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1816, PETRI_PLACES=156, PETRI_TRANSITIONS=162} [2024-06-04 16:02:00,332 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-04 16:02:00,332 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 162 transitions, 1816 flow [2024-06-04 16:02:00,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:00,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:00,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:00,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:02:00,333 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)] === [2024-06-04 16:02:00,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:00,333 INFO L85 PathProgramCache]: Analyzing trace with hash 199344424, now seen corresponding path program 1 times [2024-06-04 16:02:00,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:00,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935160442] [2024-06-04 16:02:00,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:00,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:00,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:00,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935160442] [2024-06-04 16:02:00,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935160442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:00,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:00,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:00,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032011365] [2024-06-04 16:02:00,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:00,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:00,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:00,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:00,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:00,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:00,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 162 transitions, 1816 flow. Second operand has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:00,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:00,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:00,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:00,943 INFO L124 PetriNetUnfolderBase]: 1708/2883 cut-off events. [2024-06-04 16:02:00,943 INFO L125 PetriNetUnfolderBase]: For 70290/70294 co-relation queries the response was YES. [2024-06-04 16:02:00,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15738 conditions, 2883 events. 1708/2883 cut-off events. For 70290/70294 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16940 event pairs, 423 based on Foata normal form. 8/2890 useless extension candidates. Maximal degree in co-relation 15659. Up to 2636 conditions per place. [2024-06-04 16:02:00,970 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 152 selfloop transitions, 17 changer transitions 0/175 dead transitions. [2024-06-04 16:02:00,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 175 transitions, 2224 flow [2024-06-04 16:02:00,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:00,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-04 16:02:00,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-04 16:02:00,971 INFO L175 Difference]: Start difference. First operand has 156 places, 162 transitions, 1816 flow. Second operand 5 states and 113 transitions. [2024-06-04 16:02:00,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 175 transitions, 2224 flow [2024-06-04 16:02:01,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 175 transitions, 2062 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:01,070 INFO L231 Difference]: Finished difference. Result has 155 places, 165 transitions, 1746 flow [2024-06-04 16:02:01,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1746, PETRI_PLACES=155, PETRI_TRANSITIONS=165} [2024-06-04 16:02:01,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-04 16:02:01,071 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 165 transitions, 1746 flow [2024-06-04 16:02:01,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.142857142857142) internal successors, (106), 7 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:01,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:01,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:01,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:02:01,071 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)] === [2024-06-04 16:02:01,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:01,072 INFO L85 PathProgramCache]: Analyzing trace with hash -942305170, now seen corresponding path program 1 times [2024-06-04 16:02:01,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:01,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019680292] [2024-06-04 16:02:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:01,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:01,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:01,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019680292] [2024-06-04 16:02:01,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019680292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:01,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:01,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:01,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143509805] [2024-06-04 16:02:01,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:01,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:01,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:01,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:01,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:01,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:01,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 165 transitions, 1746 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:01,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:01,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:01,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:01,575 INFO L124 PetriNetUnfolderBase]: 1718/2893 cut-off events. [2024-06-04 16:02:01,575 INFO L125 PetriNetUnfolderBase]: For 72071/72077 co-relation queries the response was YES. [2024-06-04 16:02:01,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15873 conditions, 2893 events. 1718/2893 cut-off events. For 72071/72077 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17054 event pairs, 457 based on Foata normal form. 8/2900 useless extension candidates. Maximal degree in co-relation 15795. Up to 2502 conditions per place. [2024-06-04 16:02:01,600 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 134 selfloop transitions, 45 changer transitions 0/185 dead transitions. [2024-06-04 16:02:01,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 185 transitions, 2258 flow [2024-06-04 16:02:01,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-04 16:02:01,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-04 16:02:01,601 INFO L175 Difference]: Start difference. First operand has 155 places, 165 transitions, 1746 flow. Second operand 5 states and 124 transitions. [2024-06-04 16:02:01,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 185 transitions, 2258 flow [2024-06-04 16:02:01,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 185 transitions, 2188 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:01,693 INFO L231 Difference]: Finished difference. Result has 157 places, 169 transitions, 1817 flow [2024-06-04 16:02:01,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1817, PETRI_PLACES=157, PETRI_TRANSITIONS=169} [2024-06-04 16:02:01,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-04 16:02:01,693 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 169 transitions, 1817 flow [2024-06-04 16:02:01,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:01,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:01,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:01,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:02:01,694 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)] === [2024-06-04 16:02:01,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:01,694 INFO L85 PathProgramCache]: Analyzing trace with hash 126030470, now seen corresponding path program 2 times [2024-06-04 16:02:01,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:01,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230268800] [2024-06-04 16:02:01,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:01,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:01,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:01,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:01,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230268800] [2024-06-04 16:02:01,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230268800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:01,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:01,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:01,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528797744] [2024-06-04 16:02:01,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:01,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:01,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:01,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:01,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:01,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:01,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 169 transitions, 1817 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:01,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:01,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:01,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:02,217 INFO L124 PetriNetUnfolderBase]: 1710/2878 cut-off events. [2024-06-04 16:02:02,217 INFO L125 PetriNetUnfolderBase]: For 74506/74510 co-relation queries the response was YES. [2024-06-04 16:02:02,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15873 conditions, 2878 events. 1710/2878 cut-off events. For 74506/74510 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16889 event pairs, 464 based on Foata normal form. 4/2880 useless extension candidates. Maximal degree in co-relation 15794. Up to 2494 conditions per place. [2024-06-04 16:02:02,241 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 127 selfloop transitions, 45 changer transitions 0/178 dead transitions. [2024-06-04 16:02:02,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 178 transitions, 2183 flow [2024-06-04 16:02:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:02,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:02,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-04 16:02:02,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-06-04 16:02:02,242 INFO L175 Difference]: Start difference. First operand has 157 places, 169 transitions, 1817 flow. Second operand 5 states and 117 transitions. [2024-06-04 16:02:02,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 178 transitions, 2183 flow [2024-06-04 16:02:02,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 178 transitions, 2066 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:02,341 INFO L231 Difference]: Finished difference. Result has 159 places, 169 transitions, 1799 flow [2024-06-04 16:02:02,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1700, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1799, PETRI_PLACES=159, PETRI_TRANSITIONS=169} [2024-06-04 16:02:02,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 117 predicate places. [2024-06-04 16:02:02,342 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 169 transitions, 1799 flow [2024-06-04 16:02:02,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:02,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:02,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:02,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:02:02,342 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:02,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:02,342 INFO L85 PathProgramCache]: Analyzing trace with hash 835250642, now seen corresponding path program 1 times [2024-06-04 16:02:02,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:02,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237576627] [2024-06-04 16:02:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:02,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:02,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:02,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237576627] [2024-06-04 16:02:02,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237576627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:02,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:02,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:02,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71620697] [2024-06-04 16:02:02,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:02,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:02,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:02,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:02,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:02,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:02,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 169 transitions, 1799 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:02,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:02,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:02,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:03,006 INFO L124 PetriNetUnfolderBase]: 1828/3058 cut-off events. [2024-06-04 16:02:03,007 INFO L125 PetriNetUnfolderBase]: For 84502/84504 co-relation queries the response was YES. [2024-06-04 16:02:03,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17281 conditions, 3058 events. 1828/3058 cut-off events. For 84502/84504 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 18179 event pairs, 440 based on Foata normal form. 3/3056 useless extension candidates. Maximal degree in co-relation 17202. Up to 2590 conditions per place. [2024-06-04 16:02:03,028 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 147 selfloop transitions, 66 changer transitions 0/219 dead transitions. [2024-06-04 16:02:03,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 219 transitions, 2766 flow [2024-06-04 16:02:03,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:03,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:03,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-04 16:02:03,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-04 16:02:03,029 INFO L175 Difference]: Start difference. First operand has 159 places, 169 transitions, 1799 flow. Second operand 9 states and 203 transitions. [2024-06-04 16:02:03,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 219 transitions, 2766 flow [2024-06-04 16:02:03,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 219 transitions, 2609 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:03,139 INFO L231 Difference]: Finished difference. Result has 165 places, 193 transitions, 2124 flow [2024-06-04 16:02:03,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1672, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2124, PETRI_PLACES=165, PETRI_TRANSITIONS=193} [2024-06-04 16:02:03,139 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-04 16:02:03,139 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 193 transitions, 2124 flow [2024-06-04 16:02:03,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:03,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:03,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:03,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:02:03,140 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:03,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:03,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2130290572, now seen corresponding path program 2 times [2024-06-04 16:02:03,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:03,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45618793] [2024-06-04 16:02:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:03,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:03,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:03,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:03,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45618793] [2024-06-04 16:02:03,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45618793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:03,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:03,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:03,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494480422] [2024-06-04 16:02:03,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:03,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:03,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:03,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:03,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:03,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:03,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 193 transitions, 2124 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:03,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:03,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:03,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:03,830 INFO L124 PetriNetUnfolderBase]: 1906/3190 cut-off events. [2024-06-04 16:02:03,830 INFO L125 PetriNetUnfolderBase]: For 96606/96608 co-relation queries the response was YES. [2024-06-04 16:02:03,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18947 conditions, 3190 events. 1906/3190 cut-off events. For 96606/96608 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19068 event pairs, 444 based on Foata normal form. 6/3193 useless extension candidates. Maximal degree in co-relation 18865. Up to 2587 conditions per place. [2024-06-04 16:02:03,855 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 127 selfloop transitions, 104 changer transitions 0/237 dead transitions. [2024-06-04 16:02:03,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 237 transitions, 3106 flow [2024-06-04 16:02:03,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:02:03,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-04 16:02:03,856 INFO L175 Difference]: Start difference. First operand has 165 places, 193 transitions, 2124 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:02:03,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 237 transitions, 3106 flow [2024-06-04 16:02:03,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 237 transitions, 2931 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:03,994 INFO L231 Difference]: Finished difference. Result has 172 places, 216 transitions, 2537 flow [2024-06-04 16:02:03,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1981, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2537, PETRI_PLACES=172, PETRI_TRANSITIONS=216} [2024-06-04 16:02:03,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-04 16:02:03,994 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 216 transitions, 2537 flow [2024-06-04 16:02:03,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:03,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:03,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:03,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:02:03,995 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:03,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:03,995 INFO L85 PathProgramCache]: Analyzing trace with hash -39379514, now seen corresponding path program 3 times [2024-06-04 16:02:03,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:03,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508901121] [2024-06-04 16:02:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:03,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:04,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:04,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:04,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508901121] [2024-06-04 16:02:04,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508901121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:04,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:04,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:04,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157242876] [2024-06-04 16:02:04,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:04,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:04,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:04,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:04,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:04,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:04,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 216 transitions, 2537 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:04,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:04,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:04,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:04,715 INFO L124 PetriNetUnfolderBase]: 1896/3184 cut-off events. [2024-06-04 16:02:04,715 INFO L125 PetriNetUnfolderBase]: For 99084/99086 co-relation queries the response was YES. [2024-06-04 16:02:04,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19639 conditions, 3184 events. 1896/3184 cut-off events. For 99084/99086 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19115 event pairs, 444 based on Foata normal form. 6/3187 useless extension candidates. Maximal degree in co-relation 19553. Up to 2583 conditions per place. [2024-06-04 16:02:04,746 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 130 selfloop transitions, 98 changer transitions 0/234 dead transitions. [2024-06-04 16:02:04,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 234 transitions, 3133 flow [2024-06-04 16:02:04,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:04,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:04,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:02:04,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:02:04,748 INFO L175 Difference]: Start difference. First operand has 172 places, 216 transitions, 2537 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:02:04,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 234 transitions, 3133 flow [2024-06-04 16:02:04,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 234 transitions, 2855 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:04,916 INFO L231 Difference]: Finished difference. Result has 174 places, 216 transitions, 2469 flow [2024-06-04 16:02:04,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2259, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2469, PETRI_PLACES=174, PETRI_TRANSITIONS=216} [2024-06-04 16:02:04,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-04 16:02:04,916 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 216 transitions, 2469 flow [2024-06-04 16:02:04,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:04,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:04,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:04,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:02:04,917 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:04,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1884433920, now seen corresponding path program 4 times [2024-06-04 16:02:04,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:04,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666977686] [2024-06-04 16:02:04,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:04,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:05,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:05,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:05,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666977686] [2024-06-04 16:02:05,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666977686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:05,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:05,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:05,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774826503] [2024-06-04 16:02:05,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:05,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:05,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:05,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:05,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:05,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:05,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 216 transitions, 2469 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:05,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:05,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:05,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:05,649 INFO L124 PetriNetUnfolderBase]: 1927/3243 cut-off events. [2024-06-04 16:02:05,649 INFO L125 PetriNetUnfolderBase]: For 103089/103093 co-relation queries the response was YES. [2024-06-04 16:02:05,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20019 conditions, 3243 events. 1927/3243 cut-off events. For 103089/103093 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19593 event pairs, 467 based on Foata normal form. 5/3246 useless extension candidates. Maximal degree in co-relation 19932. Up to 2553 conditions per place. [2024-06-04 16:02:05,672 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 132 selfloop transitions, 107 changer transitions 0/245 dead transitions. [2024-06-04 16:02:05,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 245 transitions, 3313 flow [2024-06-04 16:02:05,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:02:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:02:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:02:05,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-04 16:02:05,673 INFO L175 Difference]: Start difference. First operand has 174 places, 216 transitions, 2469 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:02:05,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 245 transitions, 3313 flow [2024-06-04 16:02:05,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 245 transitions, 3109 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:05,808 INFO L231 Difference]: Finished difference. Result has 178 places, 228 transitions, 2712 flow [2024-06-04 16:02:05,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2712, PETRI_PLACES=178, PETRI_TRANSITIONS=228} [2024-06-04 16:02:05,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-04 16:02:05,809 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 228 transitions, 2712 flow [2024-06-04 16:02:05,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:05,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:05,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:05,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:02:05,809 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:05,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:05,810 INFO L85 PathProgramCache]: Analyzing trace with hash -560410033, now seen corresponding path program 1 times [2024-06-04 16:02:05,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:05,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676313231] [2024-06-04 16:02:05,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:05,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:06,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:06,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676313231] [2024-06-04 16:02:06,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676313231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:06,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:06,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:06,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227259269] [2024-06-04 16:02:06,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:06,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:06,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:06,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:06,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:06,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:06,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 228 transitions, 2712 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:06,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:06,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:06,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:06,549 INFO L124 PetriNetUnfolderBase]: 1935/3253 cut-off events. [2024-06-04 16:02:06,549 INFO L125 PetriNetUnfolderBase]: For 108434/108434 co-relation queries the response was YES. [2024-06-04 16:02:06,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20847 conditions, 3253 events. 1935/3253 cut-off events. For 108434/108434 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19625 event pairs, 420 based on Foata normal form. 2/3253 useless extension candidates. Maximal degree in co-relation 20758. Up to 2820 conditions per place. [2024-06-04 16:02:06,575 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 208 selfloop transitions, 47 changer transitions 0/261 dead transitions. [2024-06-04 16:02:06,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 261 transitions, 3481 flow [2024-06-04 16:02:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 16:02:06,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-04 16:02:06,576 INFO L175 Difference]: Start difference. First operand has 178 places, 228 transitions, 2712 flow. Second operand 9 states and 199 transitions. [2024-06-04 16:02:06,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 261 transitions, 3481 flow [2024-06-04 16:02:06,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 261 transitions, 3341 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:06,758 INFO L231 Difference]: Finished difference. Result has 186 places, 235 transitions, 2810 flow [2024-06-04 16:02:06,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2574, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2810, PETRI_PLACES=186, PETRI_TRANSITIONS=235} [2024-06-04 16:02:06,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-04 16:02:06,759 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 235 transitions, 2810 flow [2024-06-04 16:02:06,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:06,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:06,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:06,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:02:06,760 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:06,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:06,760 INFO L85 PathProgramCache]: Analyzing trace with hash -623575903, now seen corresponding path program 2 times [2024-06-04 16:02:06,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:06,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377269886] [2024-06-04 16:02:06,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:06,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:07,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:07,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:07,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377269886] [2024-06-04 16:02:07,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377269886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:07,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:07,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:07,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243769449] [2024-06-04 16:02:07,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:07,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:07,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:07,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:07,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:07,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:07,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 235 transitions, 2810 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:07,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:07,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:07,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:07,702 INFO L124 PetriNetUnfolderBase]: 1929/3237 cut-off events. [2024-06-04 16:02:07,703 INFO L125 PetriNetUnfolderBase]: For 112959/112961 co-relation queries the response was YES. [2024-06-04 16:02:07,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20872 conditions, 3237 events. 1929/3237 cut-off events. For 112959/112961 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19395 event pairs, 434 based on Foata normal form. 8/3237 useless extension candidates. Maximal degree in co-relation 20779. Up to 2741 conditions per place. [2024-06-04 16:02:07,738 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 184 selfloop transitions, 71 changer transitions 0/261 dead transitions. [2024-06-04 16:02:07,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 261 transitions, 3451 flow [2024-06-04 16:02:07,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:07,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 16:02:07,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-04 16:02:07,739 INFO L175 Difference]: Start difference. First operand has 186 places, 235 transitions, 2810 flow. Second operand 6 states and 152 transitions. [2024-06-04 16:02:07,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 261 transitions, 3451 flow [2024-06-04 16:02:07,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 261 transitions, 3312 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:07,979 INFO L231 Difference]: Finished difference. Result has 187 places, 239 transitions, 2914 flow [2024-06-04 16:02:07,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2914, PETRI_PLACES=187, PETRI_TRANSITIONS=239} [2024-06-04 16:02:07,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-04 16:02:07,980 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 239 transitions, 2914 flow [2024-06-04 16:02:07,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:07,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:07,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:07,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:02:07,981 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:07,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:07,981 INFO L85 PathProgramCache]: Analyzing trace with hash 111525455, now seen corresponding path program 3 times [2024-06-04 16:02:07,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:07,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942761074] [2024-06-04 16:02:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:07,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:07,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:08,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:08,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:08,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942761074] [2024-06-04 16:02:08,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942761074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:08,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:08,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:08,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514853453] [2024-06-04 16:02:08,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:08,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:08,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:08,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:08,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:08,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 239 transitions, 2914 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:08,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:08,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:08,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:08,604 INFO L124 PetriNetUnfolderBase]: 1958/3276 cut-off events. [2024-06-04 16:02:08,605 INFO L125 PetriNetUnfolderBase]: For 116898/116900 co-relation queries the response was YES. [2024-06-04 16:02:08,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21568 conditions, 3276 events. 1958/3276 cut-off events. For 116898/116900 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19687 event pairs, 441 based on Foata normal form. 1/3272 useless extension candidates. Maximal degree in co-relation 21474. Up to 2752 conditions per place. [2024-06-04 16:02:08,637 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 182 selfloop transitions, 91 changer transitions 0/279 dead transitions. [2024-06-04 16:02:08,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 279 transitions, 3938 flow [2024-06-04 16:02:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:08,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-04 16:02:08,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-04 16:02:08,641 INFO L175 Difference]: Start difference. First operand has 187 places, 239 transitions, 2914 flow. Second operand 10 states and 219 transitions. [2024-06-04 16:02:08,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 279 transitions, 3938 flow [2024-06-04 16:02:08,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 279 transitions, 3778 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:08,832 INFO L231 Difference]: Finished difference. Result has 195 places, 251 transitions, 3205 flow [2024-06-04 16:02:08,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3205, PETRI_PLACES=195, PETRI_TRANSITIONS=251} [2024-06-04 16:02:08,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-04 16:02:08,833 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 251 transitions, 3205 flow [2024-06-04 16:02:08,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:08,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:08,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:08,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:02:08,834 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)] === [2024-06-04 16:02:08,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:08,834 INFO L85 PathProgramCache]: Analyzing trace with hash 866572971, now seen corresponding path program 4 times [2024-06-04 16:02:08,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:08,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869707536] [2024-06-04 16:02:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:08,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:09,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:09,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869707536] [2024-06-04 16:02:09,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869707536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:09,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:09,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:09,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813476523] [2024-06-04 16:02:09,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:09,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:09,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:09,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:09,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:09,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:09,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 251 transitions, 3205 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:09,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:09,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:09,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:09,501 INFO L124 PetriNetUnfolderBase]: 1971/3298 cut-off events. [2024-06-04 16:02:09,501 INFO L125 PetriNetUnfolderBase]: For 123165/123167 co-relation queries the response was YES. [2024-06-04 16:02:09,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22091 conditions, 3298 events. 1971/3298 cut-off events. For 123165/123167 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19805 event pairs, 441 based on Foata normal form. 1/3294 useless extension candidates. Maximal degree in co-relation 21994. Up to 2513 conditions per place. [2024-06-04 16:02:09,533 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 123 selfloop transitions, 157 changer transitions 0/286 dead transitions. [2024-06-04 16:02:09,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 286 transitions, 4242 flow [2024-06-04 16:02:09,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-04 16:02:09,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:02:09,534 INFO L175 Difference]: Start difference. First operand has 195 places, 251 transitions, 3205 flow. Second operand 11 states and 242 transitions. [2024-06-04 16:02:09,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 286 transitions, 4242 flow [2024-06-04 16:02:09,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 286 transitions, 4067 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:09,736 INFO L231 Difference]: Finished difference. Result has 201 places, 258 transitions, 3531 flow [2024-06-04 16:02:09,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3030, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3531, PETRI_PLACES=201, PETRI_TRANSITIONS=258} [2024-06-04 16:02:09,737 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-04 16:02:09,737 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 258 transitions, 3531 flow [2024-06-04 16:02:09,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:09,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:09,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:09,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:02:09,737 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)] === [2024-06-04 16:02:09,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:09,737 INFO L85 PathProgramCache]: Analyzing trace with hash -645479789, now seen corresponding path program 5 times [2024-06-04 16:02:09,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:09,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488683528] [2024-06-04 16:02:09,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:09,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:09,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:09,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:09,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488683528] [2024-06-04 16:02:09,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488683528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:09,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:09,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:09,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504995551] [2024-06-04 16:02:09,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:09,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:09,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:09,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:09,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:09,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:09,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 258 transitions, 3531 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:09,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:09,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:09,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:10,496 INFO L124 PetriNetUnfolderBase]: 1959/3285 cut-off events. [2024-06-04 16:02:10,496 INFO L125 PetriNetUnfolderBase]: For 129069/129071 co-relation queries the response was YES. [2024-06-04 16:02:10,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22494 conditions, 3285 events. 1959/3285 cut-off events. For 129069/129071 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19783 event pairs, 443 based on Foata normal form. 4/3286 useless extension candidates. Maximal degree in co-relation 22395. Up to 2798 conditions per place. [2024-06-04 16:02:10,527 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 199 selfloop transitions, 72 changer transitions 0/277 dead transitions. [2024-06-04 16:02:10,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 277 transitions, 4121 flow [2024-06-04 16:02:10,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:02:10,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:02:10,528 INFO L175 Difference]: Start difference. First operand has 201 places, 258 transitions, 3531 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:02:10,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 277 transitions, 4121 flow [2024-06-04 16:02:10,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 277 transitions, 3796 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:10,727 INFO L231 Difference]: Finished difference. Result has 200 places, 258 transitions, 3365 flow [2024-06-04 16:02:10,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3206, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3365, PETRI_PLACES=200, PETRI_TRANSITIONS=258} [2024-06-04 16:02:10,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-04 16:02:10,728 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 258 transitions, 3365 flow [2024-06-04 16:02:10,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:10,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:10,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:10,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:02:10,728 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:10,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:10,728 INFO L85 PathProgramCache]: Analyzing trace with hash -406270769, now seen corresponding path program 6 times [2024-06-04 16:02:10,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:10,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846838683] [2024-06-04 16:02:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:10,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:10,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:10,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846838683] [2024-06-04 16:02:10,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846838683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:10,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:10,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:10,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817987567] [2024-06-04 16:02:10,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:10,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:10,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:10,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:10,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:10,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:10,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 258 transitions, 3365 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:10,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:10,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:10,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:11,419 INFO L124 PetriNetUnfolderBase]: 1951/3269 cut-off events. [2024-06-04 16:02:11,419 INFO L125 PetriNetUnfolderBase]: For 128517/128519 co-relation queries the response was YES. [2024-06-04 16:02:11,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21918 conditions, 3269 events. 1951/3269 cut-off events. For 128517/128519 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19682 event pairs, 441 based on Foata normal form. 2/3266 useless extension candidates. Maximal degree in co-relation 21820. Up to 2502 conditions per place. [2024-06-04 16:02:11,450 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 128 selfloop transitions, 147 changer transitions 0/281 dead transitions. [2024-06-04 16:02:11,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 281 transitions, 4177 flow [2024-06-04 16:02:11,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:11,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:11,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-04 16:02:11,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-04 16:02:11,451 INFO L175 Difference]: Start difference. First operand has 200 places, 258 transitions, 3365 flow. Second operand 10 states and 224 transitions. [2024-06-04 16:02:11,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 281 transitions, 4177 flow [2024-06-04 16:02:11,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 281 transitions, 3997 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:11,676 INFO L231 Difference]: Finished difference. Result has 204 places, 258 transitions, 3491 flow [2024-06-04 16:02:11,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3189, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3491, PETRI_PLACES=204, PETRI_TRANSITIONS=258} [2024-06-04 16:02:11,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-04 16:02:11,677 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 258 transitions, 3491 flow [2024-06-04 16:02:11,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:11,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:11,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:11,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:02:11,678 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:11,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:11,678 INFO L85 PathProgramCache]: Analyzing trace with hash -290979599, now seen corresponding path program 7 times [2024-06-04 16:02:11,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:11,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19975311] [2024-06-04 16:02:11,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:11,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:11,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:11,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:11,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19975311] [2024-06-04 16:02:11,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19975311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:11,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:11,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:11,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917075587] [2024-06-04 16:02:11,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:11,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:11,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:11,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:11,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:11,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 258 transitions, 3491 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:11,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:11,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:11,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:12,333 INFO L124 PetriNetUnfolderBase]: 1935/3249 cut-off events. [2024-06-04 16:02:12,333 INFO L125 PetriNetUnfolderBase]: For 126529/126531 co-relation queries the response was YES. [2024-06-04 16:02:12,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21786 conditions, 3249 events. 1935/3249 cut-off events. For 126529/126531 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19547 event pairs, 442 based on Foata normal form. 4/3250 useless extension candidates. Maximal degree in co-relation 21688. Up to 2634 conditions per place. [2024-06-04 16:02:12,365 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 152 selfloop transitions, 119 changer transitions 0/277 dead transitions. [2024-06-04 16:02:12,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 277 transitions, 4081 flow [2024-06-04 16:02:12,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:12,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:12,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:02:12,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-04 16:02:12,366 INFO L175 Difference]: Start difference. First operand has 204 places, 258 transitions, 3491 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:02:12,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 277 transitions, 4081 flow [2024-06-04 16:02:12,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 277 transitions, 3776 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:12,625 INFO L231 Difference]: Finished difference. Result has 202 places, 258 transitions, 3445 flow [2024-06-04 16:02:12,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3186, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3445, PETRI_PLACES=202, PETRI_TRANSITIONS=258} [2024-06-04 16:02:12,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-04 16:02:12,625 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 258 transitions, 3445 flow [2024-06-04 16:02:12,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:12,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:12,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:12,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:02:12,626 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:12,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:12,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1717802681, now seen corresponding path program 1 times [2024-06-04 16:02:12,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:12,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384512624] [2024-06-04 16:02:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:12,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:12,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:12,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384512624] [2024-06-04 16:02:12,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384512624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:12,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:12,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:12,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317601093] [2024-06-04 16:02:12,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:12,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:12,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:12,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:12,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 258 transitions, 3445 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:12,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:12,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:12,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:13,308 INFO L124 PetriNetUnfolderBase]: 1927/3240 cut-off events. [2024-06-04 16:02:13,308 INFO L125 PetriNetUnfolderBase]: For 126388/126388 co-relation queries the response was YES. [2024-06-04 16:02:13,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21563 conditions, 3240 events. 1927/3240 cut-off events. For 126388/126388 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19514 event pairs, 406 based on Foata normal form. 2/3240 useless extension candidates. Maximal degree in co-relation 21465. Up to 2948 conditions per place. [2024-06-04 16:02:13,334 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 253 selfloop transitions, 17 changer transitions 0/276 dead transitions. [2024-06-04 16:02:13,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 276 transitions, 4063 flow [2024-06-04 16:02:13,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-04 16:02:13,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-04 16:02:13,335 INFO L175 Difference]: Start difference. First operand has 202 places, 258 transitions, 3445 flow. Second operand 5 states and 119 transitions. [2024-06-04 16:02:13,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 276 transitions, 4063 flow [2024-06-04 16:02:13,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 276 transitions, 3780 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:13,582 INFO L231 Difference]: Finished difference. Result has 201 places, 260 transitions, 3243 flow [2024-06-04 16:02:13,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3162, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3243, PETRI_PLACES=201, PETRI_TRANSITIONS=260} [2024-06-04 16:02:13,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-04 16:02:13,583 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 260 transitions, 3243 flow [2024-06-04 16:02:13,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:13,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:13,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:13,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:02:13,583 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:13,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:13,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1703517881, now seen corresponding path program 2 times [2024-06-04 16:02:13,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:13,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585856204] [2024-06-04 16:02:13,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:13,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:13,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:13,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585856204] [2024-06-04 16:02:13,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585856204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:13,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:13,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:02:13,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674558072] [2024-06-04 16:02:13,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:13,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:02:13,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:13,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:02:13,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:02:13,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:13,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 260 transitions, 3243 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:13,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:13,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:13,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:14,190 INFO L124 PetriNetUnfolderBase]: 1922/3240 cut-off events. [2024-06-04 16:02:14,190 INFO L125 PetriNetUnfolderBase]: For 122632/122636 co-relation queries the response was YES. [2024-06-04 16:02:14,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21051 conditions, 3240 events. 1922/3240 cut-off events. For 122632/122636 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19590 event pairs, 402 based on Foata normal form. 6/3245 useless extension candidates. Maximal degree in co-relation 20953. Up to 2921 conditions per place. [2024-06-04 16:02:14,220 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 249 selfloop transitions, 18 changer transitions 0/273 dead transitions. [2024-06-04 16:02:14,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 273 transitions, 3845 flow [2024-06-04 16:02:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:14,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-04 16:02:14,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-04 16:02:14,221 INFO L175 Difference]: Start difference. First operand has 201 places, 260 transitions, 3243 flow. Second operand 5 states and 112 transitions. [2024-06-04 16:02:14,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 273 transitions, 3845 flow [2024-06-04 16:02:14,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 273 transitions, 3784 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:14,451 INFO L231 Difference]: Finished difference. Result has 203 places, 262 transitions, 3269 flow [2024-06-04 16:02:14,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3182, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3269, PETRI_PLACES=203, PETRI_TRANSITIONS=262} [2024-06-04 16:02:14,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-04 16:02:14,452 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 262 transitions, 3269 flow [2024-06-04 16:02:14,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:14,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:14,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:14,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:02:14,453 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:14,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:14,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1496173279, now seen corresponding path program 1 times [2024-06-04 16:02:14,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:14,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515454784] [2024-06-04 16:02:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:14,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:14,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:14,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:14,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:14,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515454784] [2024-06-04 16:02:14,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515454784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:14,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:14,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:14,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279920044] [2024-06-04 16:02:14,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:14,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:14,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:14,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:14,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:14,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:14,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 262 transitions, 3269 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:14,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:14,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:14,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:15,187 INFO L124 PetriNetUnfolderBase]: 1930/3250 cut-off events. [2024-06-04 16:02:15,188 INFO L125 PetriNetUnfolderBase]: For 128037/128037 co-relation queries the response was YES. [2024-06-04 16:02:15,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21281 conditions, 3250 events. 1930/3250 cut-off events. For 128037/128037 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 19608 event pairs, 373 based on Foata normal form. 2/3251 useless extension candidates. Maximal degree in co-relation 21182. Up to 2916 conditions per place. [2024-06-04 16:02:15,219 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 252 selfloop transitions, 34 changer transitions 0/292 dead transitions. [2024-06-04 16:02:15,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 292 transitions, 4095 flow [2024-06-04 16:02:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:15,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:15,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-04 16:02:15,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4975609756097561 [2024-06-04 16:02:15,220 INFO L175 Difference]: Start difference. First operand has 203 places, 262 transitions, 3269 flow. Second operand 10 states and 204 transitions. [2024-06-04 16:02:15,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 292 transitions, 4095 flow [2024-06-04 16:02:15,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 292 transitions, 4024 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:15,443 INFO L231 Difference]: Finished difference. Result has 210 places, 266 transitions, 3371 flow [2024-06-04 16:02:15,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3371, PETRI_PLACES=210, PETRI_TRANSITIONS=266} [2024-06-04 16:02:15,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-04 16:02:15,443 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 266 transitions, 3371 flow [2024-06-04 16:02:15,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:15,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:15,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:15,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:02:15,444 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:15,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:15,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1499030239, now seen corresponding path program 2 times [2024-06-04 16:02:15,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:15,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177139123] [2024-06-04 16:02:15,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:15,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:15,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:15,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:15,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177139123] [2024-06-04 16:02:15,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177139123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:15,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:15,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:15,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162032305] [2024-06-04 16:02:15,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:15,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:15,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:15,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:15,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:15,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:15,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 266 transitions, 3371 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:15,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:15,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:15,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:16,192 INFO L124 PetriNetUnfolderBase]: 1938/3262 cut-off events. [2024-06-04 16:02:16,192 INFO L125 PetriNetUnfolderBase]: For 133218/133218 co-relation queries the response was YES. [2024-06-04 16:02:16,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21531 conditions, 3262 events. 1938/3262 cut-off events. For 133218/133218 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19661 event pairs, 404 based on Foata normal form. 2/3263 useless extension candidates. Maximal degree in co-relation 21431. Up to 2961 conditions per place. [2024-06-04 16:02:16,219 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 253 selfloop transitions, 30 changer transitions 0/289 dead transitions. [2024-06-04 16:02:16,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 289 transitions, 4039 flow [2024-06-04 16:02:16,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:16,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-04 16:02:16,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4853658536585366 [2024-06-04 16:02:16,220 INFO L175 Difference]: Start difference. First operand has 210 places, 266 transitions, 3371 flow. Second operand 10 states and 199 transitions. [2024-06-04 16:02:16,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 289 transitions, 4039 flow [2024-06-04 16:02:16,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 289 transitions, 3915 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:16,482 INFO L231 Difference]: Finished difference. Result has 213 places, 268 transitions, 3368 flow [2024-06-04 16:02:16,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3265, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3368, PETRI_PLACES=213, PETRI_TRANSITIONS=268} [2024-06-04 16:02:16,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-04 16:02:16,483 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 268 transitions, 3368 flow [2024-06-04 16:02:16,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:16,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:16,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:16,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:02:16,483 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:16,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:16,484 INFO L85 PathProgramCache]: Analyzing trace with hash -290970671, now seen corresponding path program 3 times [2024-06-04 16:02:16,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:16,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722898666] [2024-06-04 16:02:16,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:16,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:16,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:16,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722898666] [2024-06-04 16:02:16,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722898666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:16,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:16,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:16,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453862511] [2024-06-04 16:02:16,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:16,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:16,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:16,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:16,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:16,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:16,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 268 transitions, 3368 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:16,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:16,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:16,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:17,149 INFO L124 PetriNetUnfolderBase]: 1933/3255 cut-off events. [2024-06-04 16:02:17,149 INFO L125 PetriNetUnfolderBase]: For 134943/134943 co-relation queries the response was YES. [2024-06-04 16:02:17,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21348 conditions, 3255 events. 1933/3255 cut-off events. For 134943/134943 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19617 event pairs, 373 based on Foata normal form. 2/3256 useless extension candidates. Maximal degree in co-relation 21249. Up to 2937 conditions per place. [2024-06-04 16:02:17,179 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 255 selfloop transitions, 27 changer transitions 0/288 dead transitions. [2024-06-04 16:02:17,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 288 transitions, 3982 flow [2024-06-04 16:02:17,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:17,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:17,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-04 16:02:17,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-04 16:02:17,180 INFO L175 Difference]: Start difference. First operand has 213 places, 268 transitions, 3368 flow. Second operand 6 states and 138 transitions. [2024-06-04 16:02:17,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 288 transitions, 3982 flow [2024-06-04 16:02:17,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 288 transitions, 3859 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-04 16:02:17,438 INFO L231 Difference]: Finished difference. Result has 210 places, 268 transitions, 3308 flow [2024-06-04 16:02:17,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3245, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3308, PETRI_PLACES=210, PETRI_TRANSITIONS=268} [2024-06-04 16:02:17,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-04 16:02:17,439 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 268 transitions, 3308 flow [2024-06-04 16:02:17,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:17,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:17,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:17,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:02:17,440 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)] === [2024-06-04 16:02:17,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:17,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1220584139, now seen corresponding path program 1 times [2024-06-04 16:02:17,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:17,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205924657] [2024-06-04 16:02:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:17,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:17,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:17,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:17,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:17,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205924657] [2024-06-04 16:02:17,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205924657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:17,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:17,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:17,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054190663] [2024-06-04 16:02:17,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:17,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:17,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:17,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:17,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:17,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:17,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 268 transitions, 3308 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:17,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:17,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:17,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:18,199 INFO L124 PetriNetUnfolderBase]: 1977/3317 cut-off events. [2024-06-04 16:02:18,199 INFO L125 PetriNetUnfolderBase]: For 153523/153525 co-relation queries the response was YES. [2024-06-04 16:02:18,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21703 conditions, 3317 events. 1977/3317 cut-off events. For 153523/153525 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20025 event pairs, 438 based on Foata normal form. 12/3326 useless extension candidates. Maximal degree in co-relation 21603. Up to 2800 conditions per place. [2024-06-04 16:02:18,242 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 217 selfloop transitions, 65 changer transitions 0/288 dead transitions. [2024-06-04 16:02:18,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 288 transitions, 3996 flow [2024-06-04 16:02:18,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:18,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:18,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 16:02:18,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-04 16:02:18,249 INFO L175 Difference]: Start difference. First operand has 210 places, 268 transitions, 3308 flow. Second operand 6 states and 143 transitions. [2024-06-04 16:02:18,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 288 transitions, 3996 flow [2024-06-04 16:02:18,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 288 transitions, 3935 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:18,527 INFO L231 Difference]: Finished difference. Result has 211 places, 271 transitions, 3452 flow [2024-06-04 16:02:18,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3247, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3452, PETRI_PLACES=211, PETRI_TRANSITIONS=271} [2024-06-04 16:02:18,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-04 16:02:18,527 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 271 transitions, 3452 flow [2024-06-04 16:02:18,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:18,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:18,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:18,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:02:18,528 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)] === [2024-06-04 16:02:18,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:18,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1933727849, now seen corresponding path program 2 times [2024-06-04 16:02:18,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:18,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466269407] [2024-06-04 16:02:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:18,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:18,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:18,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466269407] [2024-06-04 16:02:18,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466269407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:18,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:18,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:18,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708565928] [2024-06-04 16:02:18,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:18,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:18,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:18,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:18,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:18,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:18,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 271 transitions, 3452 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:18,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:18,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:18,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:19,206 INFO L124 PetriNetUnfolderBase]: 2021/3393 cut-off events. [2024-06-04 16:02:19,206 INFO L125 PetriNetUnfolderBase]: For 161306/161310 co-relation queries the response was YES. [2024-06-04 16:02:19,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22510 conditions, 3393 events. 2021/3393 cut-off events. For 161306/161310 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20611 event pairs, 472 based on Foata normal form. 14/3405 useless extension candidates. Maximal degree in co-relation 22409. Up to 2876 conditions per place. [2024-06-04 16:02:19,238 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 226 selfloop transitions, 56 changer transitions 0/288 dead transitions. [2024-06-04 16:02:19,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 288 transitions, 4138 flow [2024-06-04 16:02:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-04 16:02:19,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5650406504065041 [2024-06-04 16:02:19,240 INFO L175 Difference]: Start difference. First operand has 211 places, 271 transitions, 3452 flow. Second operand 6 states and 139 transitions. [2024-06-04 16:02:19,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 288 transitions, 4138 flow [2024-06-04 16:02:19,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 288 transitions, 3969 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:19,553 INFO L231 Difference]: Finished difference. Result has 213 places, 274 transitions, 3474 flow [2024-06-04 16:02:19,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3474, PETRI_PLACES=213, PETRI_TRANSITIONS=274} [2024-06-04 16:02:19,553 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-04 16:02:19,553 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 274 transitions, 3474 flow [2024-06-04 16:02:19,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:19,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:19,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:19,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:02:19,554 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)] === [2024-06-04 16:02:19,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1703511929, now seen corresponding path program 3 times [2024-06-04 16:02:19,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:19,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377092179] [2024-06-04 16:02:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:19,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:19,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:19,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:19,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377092179] [2024-06-04 16:02:19,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377092179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:19,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:19,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:19,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504236787] [2024-06-04 16:02:19,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:19,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:19,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:19,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:19,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:19,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:19,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 274 transitions, 3474 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:19,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:19,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:19,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:20,256 INFO L124 PetriNetUnfolderBase]: 2154/3608 cut-off events. [2024-06-04 16:02:20,256 INFO L125 PetriNetUnfolderBase]: For 185923/185927 co-relation queries the response was YES. [2024-06-04 16:02:20,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24441 conditions, 3608 events. 2154/3608 cut-off events. For 185923/185927 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22113 event pairs, 484 based on Foata normal form. 14/3620 useless extension candidates. Maximal degree in co-relation 24339. Up to 2817 conditions per place. [2024-06-04 16:02:20,293 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 232 selfloop transitions, 60 changer transitions 0/298 dead transitions. [2024-06-04 16:02:20,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 298 transitions, 4356 flow [2024-06-04 16:02:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:20,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 16:02:20,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-04 16:02:20,294 INFO L175 Difference]: Start difference. First operand has 213 places, 274 transitions, 3474 flow. Second operand 6 states and 143 transitions. [2024-06-04 16:02:20,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 298 transitions, 4356 flow [2024-06-04 16:02:20,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 298 transitions, 4197 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:20,643 INFO L231 Difference]: Finished difference. Result has 216 places, 279 transitions, 3572 flow [2024-06-04 16:02:20,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3315, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3572, PETRI_PLACES=216, PETRI_TRANSITIONS=279} [2024-06-04 16:02:20,643 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-04 16:02:20,644 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 279 transitions, 3572 flow [2024-06-04 16:02:20,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:20,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:20,644 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] [2024-06-04 16:02:20,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:02:20,644 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)] === [2024-06-04 16:02:20,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:20,644 INFO L85 PathProgramCache]: Analyzing trace with hash -421865377, now seen corresponding path program 1 times [2024-06-04 16:02:20,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:20,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548040258] [2024-06-04 16:02:20,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:20,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:20,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:20,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:20,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548040258] [2024-06-04 16:02:20,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548040258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:20,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:20,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:20,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324982867] [2024-06-04 16:02:20,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:20,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:20,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:20,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:20,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:20,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:20,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 279 transitions, 3572 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:20,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:20,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:20,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:21,466 INFO L124 PetriNetUnfolderBase]: 2247/3769 cut-off events. [2024-06-04 16:02:21,466 INFO L125 PetriNetUnfolderBase]: For 211638/211644 co-relation queries the response was YES. [2024-06-04 16:02:21,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26146 conditions, 3769 events. 2247/3769 cut-off events. For 211638/211644 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23261 event pairs, 425 based on Foata normal form. 18/3786 useless extension candidates. Maximal degree in co-relation 26042. Up to 2986 conditions per place. [2024-06-04 16:02:21,508 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 241 selfloop transitions, 63 changer transitions 0/310 dead transitions. [2024-06-04 16:02:21,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 310 transitions, 4459 flow [2024-06-04 16:02:21,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:21,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 16:02:21,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:02:21,509 INFO L175 Difference]: Start difference. First operand has 216 places, 279 transitions, 3572 flow. Second operand 6 states and 150 transitions. [2024-06-04 16:02:21,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 310 transitions, 4459 flow [2024-06-04 16:02:21,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 310 transitions, 4329 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:21,915 INFO L231 Difference]: Finished difference. Result has 221 places, 283 transitions, 3666 flow [2024-06-04 16:02:21,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3448, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3666, PETRI_PLACES=221, PETRI_TRANSITIONS=283} [2024-06-04 16:02:21,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-04 16:02:21,915 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 283 transitions, 3666 flow [2024-06-04 16:02:21,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:21,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:21,916 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] [2024-06-04 16:02:21,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:02:21,916 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)] === [2024-06-04 16:02:21,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:21,917 INFO L85 PathProgramCache]: Analyzing trace with hash 682853037, now seen corresponding path program 2 times [2024-06-04 16:02:21,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:21,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452783716] [2024-06-04 16:02:21,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:21,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:21,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:22,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:22,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452783716] [2024-06-04 16:02:22,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452783716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:22,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:22,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:22,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715664922] [2024-06-04 16:02:22,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:22,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:22,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:22,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:22,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:22,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:22,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 283 transitions, 3666 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:22,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:22,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:22,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:22,654 INFO L124 PetriNetUnfolderBase]: 2303/3857 cut-off events. [2024-06-04 16:02:22,654 INFO L125 PetriNetUnfolderBase]: For 225339/225345 co-relation queries the response was YES. [2024-06-04 16:02:22,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27024 conditions, 3857 events. 2303/3857 cut-off events. For 225339/225345 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23971 event pairs, 550 based on Foata normal form. 22/3878 useless extension candidates. Maximal degree in co-relation 26917. Up to 3298 conditions per place. [2024-06-04 16:02:22,694 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 242 selfloop transitions, 57 changer transitions 0/305 dead transitions. [2024-06-04 16:02:22,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 305 transitions, 4373 flow [2024-06-04 16:02:22,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:22,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 16:02:22,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-04 16:02:22,695 INFO L175 Difference]: Start difference. First operand has 221 places, 283 transitions, 3666 flow. Second operand 6 states and 143 transitions. [2024-06-04 16:02:22,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 305 transitions, 4373 flow [2024-06-04 16:02:23,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 305 transitions, 4236 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:23,065 INFO L231 Difference]: Finished difference. Result has 224 places, 285 transitions, 3690 flow [2024-06-04 16:02:23,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3531, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3690, PETRI_PLACES=224, PETRI_TRANSITIONS=285} [2024-06-04 16:02:23,065 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-04 16:02:23,065 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 285 transitions, 3690 flow [2024-06-04 16:02:23,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:23,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:23,066 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] [2024-06-04 16:02:23,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:02:23,066 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)] === [2024-06-04 16:02:23,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:23,066 INFO L85 PathProgramCache]: Analyzing trace with hash -193139715, now seen corresponding path program 1 times [2024-06-04 16:02:23,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:23,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486704275] [2024-06-04 16:02:23,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:23,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:23,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:23,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486704275] [2024-06-04 16:02:23,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486704275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:23,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:23,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:23,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084977094] [2024-06-04 16:02:23,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:23,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:23,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:23,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:23,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:23,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:23,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 285 transitions, 3690 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:23,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:23,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:23,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:23,912 INFO L124 PetriNetUnfolderBase]: 2393/3995 cut-off events. [2024-06-04 16:02:23,912 INFO L125 PetriNetUnfolderBase]: For 216271/216271 co-relation queries the response was YES. [2024-06-04 16:02:23,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28244 conditions, 3995 events. 2393/3995 cut-off events. For 216271/216271 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24815 event pairs, 520 based on Foata normal form. 1/3994 useless extension candidates. Maximal degree in co-relation 28136. Up to 3452 conditions per place. [2024-06-04 16:02:23,948 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 262 selfloop transitions, 85 changer transitions 0/353 dead transitions. [2024-06-04 16:02:23,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 353 transitions, 5369 flow [2024-06-04 16:02:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-04 16:02:23,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-04 16:02:23,950 INFO L175 Difference]: Start difference. First operand has 224 places, 285 transitions, 3690 flow. Second operand 10 states and 218 transitions. [2024-06-04 16:02:23,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 353 transitions, 5369 flow [2024-06-04 16:02:24,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 353 transitions, 5223 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:24,329 INFO L231 Difference]: Finished difference. Result has 232 places, 319 transitions, 4334 flow [2024-06-04 16:02:24,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4334, PETRI_PLACES=232, PETRI_TRANSITIONS=319} [2024-06-04 16:02:24,329 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-04 16:02:24,330 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 319 transitions, 4334 flow [2024-06-04 16:02:24,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:24,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:24,330 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] [2024-06-04 16:02:24,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:02:24,330 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)] === [2024-06-04 16:02:24,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:24,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1249689137, now seen corresponding path program 2 times [2024-06-04 16:02:24,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:24,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854336174] [2024-06-04 16:02:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:24,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:24,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:24,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854336174] [2024-06-04 16:02:24,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854336174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:24,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:24,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:24,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224755211] [2024-06-04 16:02:24,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:24,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:24,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:24,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:24,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:24,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:24,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 319 transitions, 4334 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:24,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:24,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:24,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:25,163 INFO L124 PetriNetUnfolderBase]: 2414/4029 cut-off events. [2024-06-04 16:02:25,163 INFO L125 PetriNetUnfolderBase]: For 226704/226704 co-relation queries the response was YES. [2024-06-04 16:02:25,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28829 conditions, 4029 events. 2414/4029 cut-off events. For 226704/226704 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 25088 event pairs, 520 based on Foata normal form. 1/4028 useless extension candidates. Maximal degree in co-relation 28718. Up to 3138 conditions per place. [2024-06-04 16:02:25,206 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 161 selfloop transitions, 193 changer transitions 0/360 dead transitions. [2024-06-04 16:02:25,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 360 transitions, 5590 flow [2024-06-04 16:02:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:25,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 248 transitions. [2024-06-04 16:02:25,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.549889135254989 [2024-06-04 16:02:25,209 INFO L175 Difference]: Start difference. First operand has 232 places, 319 transitions, 4334 flow. Second operand 11 states and 248 transitions. [2024-06-04 16:02:25,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 360 transitions, 5590 flow [2024-06-04 16:02:25,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 360 transitions, 5445 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:25,639 INFO L231 Difference]: Finished difference. Result has 240 places, 327 transitions, 4757 flow [2024-06-04 16:02:25,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4189, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4757, PETRI_PLACES=240, PETRI_TRANSITIONS=327} [2024-06-04 16:02:25,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-04 16:02:25,640 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 327 transitions, 4757 flow [2024-06-04 16:02:25,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:25,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:25,640 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] [2024-06-04 16:02:25,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:02:25,640 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)] === [2024-06-04 16:02:25,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:25,641 INFO L85 PathProgramCache]: Analyzing trace with hash 254113121, now seen corresponding path program 3 times [2024-06-04 16:02:25,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:25,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074551135] [2024-06-04 16:02:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:25,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:25,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:25,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074551135] [2024-06-04 16:02:25,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074551135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:25,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:25,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:25,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638357956] [2024-06-04 16:02:25,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:25,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:25,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:25,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:25,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:25,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:25,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 327 transitions, 4757 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:25,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:25,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:25,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:26,444 INFO L124 PetriNetUnfolderBase]: 2427/4051 cut-off events. [2024-06-04 16:02:26,444 INFO L125 PetriNetUnfolderBase]: For 237230/237230 co-relation queries the response was YES. [2024-06-04 16:02:26,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29844 conditions, 4051 events. 2427/4051 cut-off events. For 237230/237230 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 25227 event pairs, 520 based on Foata normal form. 1/4050 useless extension candidates. Maximal degree in co-relation 29730. Up to 3151 conditions per place. [2024-06-04 16:02:26,487 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 182 changer transitions 0/357 dead transitions. [2024-06-04 16:02:26,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 357 transitions, 5939 flow [2024-06-04 16:02:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:26,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-04 16:02:26,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5439024390243903 [2024-06-04 16:02:26,488 INFO L175 Difference]: Start difference. First operand has 240 places, 327 transitions, 4757 flow. Second operand 10 states and 223 transitions. [2024-06-04 16:02:26,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 357 transitions, 5939 flow [2024-06-04 16:02:26,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 357 transitions, 5661 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:26,895 INFO L231 Difference]: Finished difference. Result has 243 places, 331 transitions, 4920 flow [2024-06-04 16:02:26,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4488, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4920, PETRI_PLACES=243, PETRI_TRANSITIONS=331} [2024-06-04 16:02:26,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-04 16:02:26,895 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 331 transitions, 4920 flow [2024-06-04 16:02:26,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:26,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:26,895 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] [2024-06-04 16:02:26,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 16:02:26,896 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)] === [2024-06-04 16:02:26,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:26,896 INFO L85 PathProgramCache]: Analyzing trace with hash 248572181, now seen corresponding path program 4 times [2024-06-04 16:02:26,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:26,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298248656] [2024-06-04 16:02:26,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:26,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:26,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:27,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:27,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:27,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298248656] [2024-06-04 16:02:27,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298248656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:27,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:27,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:27,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514978914] [2024-06-04 16:02:27,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:27,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:27,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:27,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:27,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:27,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 331 transitions, 4920 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:27,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:27,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:27,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:27,721 INFO L124 PetriNetUnfolderBase]: 2418/4033 cut-off events. [2024-06-04 16:02:27,721 INFO L125 PetriNetUnfolderBase]: For 243908/243910 co-relation queries the response was YES. [2024-06-04 16:02:27,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29605 conditions, 4033 events. 2418/4033 cut-off events. For 243908/243910 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 25088 event pairs, 534 based on Foata normal form. 5/4030 useless extension candidates. Maximal degree in co-relation 29492. Up to 3476 conditions per place. [2024-06-04 16:02:27,833 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 270 selfloop transitions, 80 changer transitions 0/356 dead transitions. [2024-06-04 16:02:27,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 356 transitions, 5684 flow [2024-06-04 16:02:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-04 16:02:27,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-04 16:02:27,834 INFO L175 Difference]: Start difference. First operand has 243 places, 331 transitions, 4920 flow. Second operand 6 states and 154 transitions. [2024-06-04 16:02:27,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 356 transitions, 5684 flow [2024-06-04 16:02:28,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 356 transitions, 5384 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:28,228 INFO L231 Difference]: Finished difference. Result has 243 places, 331 transitions, 4795 flow [2024-06-04 16:02:28,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4620, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4795, PETRI_PLACES=243, PETRI_TRANSITIONS=331} [2024-06-04 16:02:28,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-04 16:02:28,228 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 331 transitions, 4795 flow [2024-06-04 16:02:28,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:28,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:28,229 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] [2024-06-04 16:02:28,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 16:02:28,229 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)] === [2024-06-04 16:02:28,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:28,229 INFO L85 PathProgramCache]: Analyzing trace with hash 257832191, now seen corresponding path program 5 times [2024-06-04 16:02:28,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:28,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408393134] [2024-06-04 16:02:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:28,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:28,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:28,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:28,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408393134] [2024-06-04 16:02:28,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408393134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:28,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:28,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:28,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656313563] [2024-06-04 16:02:28,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:28,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:28,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:28,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:28,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:28,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:28,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 331 transitions, 4795 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:28,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:28,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:28,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:29,046 INFO L124 PetriNetUnfolderBase]: 2409/4021 cut-off events. [2024-06-04 16:02:29,047 INFO L125 PetriNetUnfolderBase]: For 244957/244959 co-relation queries the response was YES. [2024-06-04 16:02:29,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29196 conditions, 4021 events. 2409/4021 cut-off events. For 244957/244959 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 25012 event pairs, 534 based on Foata normal form. 5/4018 useless extension candidates. Maximal degree in co-relation 29082. Up to 3363 conditions per place. [2024-06-04 16:02:29,087 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 237 selfloop transitions, 110 changer transitions 0/353 dead transitions. [2024-06-04 16:02:29,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 353 transitions, 5545 flow [2024-06-04 16:02:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:29,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:29,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 16:02:29,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-04 16:02:29,088 INFO L175 Difference]: Start difference. First operand has 243 places, 331 transitions, 4795 flow. Second operand 6 states and 151 transitions. [2024-06-04 16:02:29,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 353 transitions, 5545 flow [2024-06-04 16:02:29,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 353 transitions, 5351 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:29,544 INFO L231 Difference]: Finished difference. Result has 243 places, 331 transitions, 4841 flow [2024-06-04 16:02:29,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4601, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4841, PETRI_PLACES=243, PETRI_TRANSITIONS=331} [2024-06-04 16:02:29,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-04 16:02:29,545 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 331 transitions, 4841 flow [2024-06-04 16:02:29,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:29,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:29,545 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] [2024-06-04 16:02:29,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 16:02:29,545 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)] === [2024-06-04 16:02:29,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:29,546 INFO L85 PathProgramCache]: Analyzing trace with hash 408870359, now seen corresponding path program 3 times [2024-06-04 16:02:29,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:29,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559575453] [2024-06-04 16:02:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:29,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:29,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:29,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559575453] [2024-06-04 16:02:29,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559575453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:29,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:29,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:29,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501726683] [2024-06-04 16:02:29,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:29,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:29,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:29,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:29,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:29,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:29,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 331 transitions, 4841 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:29,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:29,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:29,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:30,289 INFO L124 PetriNetUnfolderBase]: 2370/3972 cut-off events. [2024-06-04 16:02:30,289 INFO L125 PetriNetUnfolderBase]: For 240889/240893 co-relation queries the response was YES. [2024-06-04 16:02:30,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27999 conditions, 3972 events. 2370/3972 cut-off events. For 240889/240893 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24788 event pairs, 554 based on Foata normal form. 18/3988 useless extension candidates. Maximal degree in co-relation 27885. Up to 3361 conditions per place. [2024-06-04 16:02:30,331 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 274 selfloop transitions, 65 changer transitions 0/345 dead transitions. [2024-06-04 16:02:30,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 345 transitions, 5575 flow [2024-06-04 16:02:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:30,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-04 16:02:30,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-04 16:02:30,332 INFO L175 Difference]: Start difference. First operand has 243 places, 331 transitions, 4841 flow. Second operand 6 states and 137 transitions. [2024-06-04 16:02:30,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 345 transitions, 5575 flow [2024-06-04 16:02:30,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 345 transitions, 5348 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:30,752 INFO L231 Difference]: Finished difference. Result has 244 places, 331 transitions, 4750 flow [2024-06-04 16:02:30,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4614, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4750, PETRI_PLACES=244, PETRI_TRANSITIONS=331} [2024-06-04 16:02:30,752 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-04 16:02:30,752 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 331 transitions, 4750 flow [2024-06-04 16:02:30,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:30,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:30,753 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] [2024-06-04 16:02:30,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 16:02:30,753 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)] === [2024-06-04 16:02:30,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:30,753 INFO L85 PathProgramCache]: Analyzing trace with hash 856619047, now seen corresponding path program 1 times [2024-06-04 16:02:30,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:30,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667742973] [2024-06-04 16:02:30,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:30,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:30,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:30,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:30,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667742973] [2024-06-04 16:02:30,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667742973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:30,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:30,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:30,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020897256] [2024-06-04 16:02:30,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:30,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:30,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:30,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:30,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:30,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:30,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 331 transitions, 4750 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:30,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:30,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:30,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:31,507 INFO L124 PetriNetUnfolderBase]: 2337/3919 cut-off events. [2024-06-04 16:02:31,507 INFO L125 PetriNetUnfolderBase]: For 210741/210745 co-relation queries the response was YES. [2024-06-04 16:02:31,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26822 conditions, 3919 events. 2337/3919 cut-off events. For 210741/210745 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24427 event pairs, 504 based on Foata normal form. 14/3931 useless extension candidates. Maximal degree in co-relation 26708. Up to 2994 conditions per place. [2024-06-04 16:02:31,548 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 269 selfloop transitions, 73 changer transitions 0/348 dead transitions. [2024-06-04 16:02:31,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 348 transitions, 5508 flow [2024-06-04 16:02:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:31,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:31,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-04 16:02:31,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-04 16:02:31,549 INFO L175 Difference]: Start difference. First operand has 244 places, 331 transitions, 4750 flow. Second operand 6 states and 140 transitions. [2024-06-04 16:02:31,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 348 transitions, 5508 flow [2024-06-04 16:02:32,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 348 transitions, 5347 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:32,024 INFO L231 Difference]: Finished difference. Result has 245 places, 331 transitions, 4743 flow [2024-06-04 16:02:32,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4589, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4743, PETRI_PLACES=245, PETRI_TRANSITIONS=331} [2024-06-04 16:02:32,025 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-04 16:02:32,025 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 331 transitions, 4743 flow [2024-06-04 16:02:32,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:32,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:32,025 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] [2024-06-04 16:02:32,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 16:02:32,026 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)] === [2024-06-04 16:02:32,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:32,026 INFO L85 PathProgramCache]: Analyzing trace with hash -837976067, now seen corresponding path program 6 times [2024-06-04 16:02:32,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:32,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288185930] [2024-06-04 16:02:32,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:32,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:32,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:32,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:32,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288185930] [2024-06-04 16:02:32,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288185930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:32,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:32,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:32,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162802551] [2024-06-04 16:02:32,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:32,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:32,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:32,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:32,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:32,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:32,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 331 transitions, 4743 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:32,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:32,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:32,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:32,797 INFO L124 PetriNetUnfolderBase]: 2342/3930 cut-off events. [2024-06-04 16:02:32,797 INFO L125 PetriNetUnfolderBase]: For 195096/195100 co-relation queries the response was YES. [2024-06-04 16:02:32,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26961 conditions, 3930 events. 2342/3930 cut-off events. For 195096/195100 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24552 event pairs, 508 based on Foata normal form. 3/3931 useless extension candidates. Maximal degree in co-relation 26846. Up to 3033 conditions per place. [2024-06-04 16:02:32,840 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 189 selfloop transitions, 165 changer transitions 0/360 dead transitions. [2024-06-04 16:02:32,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 360 transitions, 5812 flow [2024-06-04 16:02:32,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-04 16:02:32,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-04 16:02:32,841 INFO L175 Difference]: Start difference. First operand has 245 places, 331 transitions, 4743 flow. Second operand 11 states and 235 transitions. [2024-06-04 16:02:32,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 360 transitions, 5812 flow [2024-06-04 16:02:33,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 360 transitions, 5619 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:33,280 INFO L231 Difference]: Finished difference. Result has 250 places, 334 transitions, 4941 flow [2024-06-04 16:02:33,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4550, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4941, PETRI_PLACES=250, PETRI_TRANSITIONS=334} [2024-06-04 16:02:33,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-04 16:02:33,281 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 334 transitions, 4941 flow [2024-06-04 16:02:33,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:33,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:33,281 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] [2024-06-04 16:02:33,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 16:02:33,281 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)] === [2024-06-04 16:02:33,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:33,281 INFO L85 PathProgramCache]: Analyzing trace with hash -837677537, now seen corresponding path program 7 times [2024-06-04 16:02:33,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:33,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899889688] [2024-06-04 16:02:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:33,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:33,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:33,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899889688] [2024-06-04 16:02:33,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899889688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:33,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:33,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:33,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126073116] [2024-06-04 16:02:33,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:33,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:33,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:33,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:33,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:33,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:33,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 334 transitions, 4941 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:33,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:33,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:33,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:34,055 INFO L124 PetriNetUnfolderBase]: 2339/3926 cut-off events. [2024-06-04 16:02:34,056 INFO L125 PetriNetUnfolderBase]: For 198651/198655 co-relation queries the response was YES. [2024-06-04 16:02:34,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26929 conditions, 3926 events. 2339/3926 cut-off events. For 198651/198655 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24526 event pairs, 508 based on Foata normal form. 3/3927 useless extension candidates. Maximal degree in co-relation 26814. Up to 3031 conditions per place. [2024-06-04 16:02:34,095 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 189 selfloop transitions, 161 changer transitions 0/356 dead transitions. [2024-06-04 16:02:34,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 356 transitions, 5941 flow [2024-06-04 16:02:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-04 16:02:34,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-04 16:02:34,096 INFO L175 Difference]: Start difference. First operand has 250 places, 334 transitions, 4941 flow. Second operand 10 states and 217 transitions. [2024-06-04 16:02:34,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 356 transitions, 5941 flow [2024-06-04 16:02:34,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 356 transitions, 5728 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:34,524 INFO L231 Difference]: Finished difference. Result has 256 places, 334 transitions, 5056 flow [2024-06-04 16:02:34,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4728, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5056, PETRI_PLACES=256, PETRI_TRANSITIONS=334} [2024-06-04 16:02:34,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-04 16:02:34,525 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 334 transitions, 5056 flow [2024-06-04 16:02:34,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:34,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:34,525 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] [2024-06-04 16:02:34,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 16:02:34,525 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)] === [2024-06-04 16:02:34,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:34,526 INFO L85 PathProgramCache]: Analyzing trace with hash -483414497, now seen corresponding path program 8 times [2024-06-04 16:02:34,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:34,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418737485] [2024-06-04 16:02:34,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:34,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:34,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:34,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:34,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418737485] [2024-06-04 16:02:34,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418737485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:34,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:34,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:34,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005308656] [2024-06-04 16:02:34,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:34,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:34,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:34,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:34,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:34,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:34,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 334 transitions, 5056 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:34,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:34,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:34,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:35,325 INFO L124 PetriNetUnfolderBase]: 2333/3918 cut-off events. [2024-06-04 16:02:35,325 INFO L125 PetriNetUnfolderBase]: For 203645/203649 co-relation queries the response was YES. [2024-06-04 16:02:35,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26877 conditions, 3918 events. 2333/3918 cut-off events. For 203645/203649 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24524 event pairs, 508 based on Foata normal form. 4/3920 useless extension candidates. Maximal degree in co-relation 26761. Up to 3026 conditions per place. [2024-06-04 16:02:35,366 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 199 selfloop transitions, 147 changer transitions 0/352 dead transitions. [2024-06-04 16:02:35,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 352 transitions, 6042 flow [2024-06-04 16:02:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:35,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-04 16:02:35,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:02:35,367 INFO L175 Difference]: Start difference. First operand has 256 places, 334 transitions, 5056 flow. Second operand 9 states and 198 transitions. [2024-06-04 16:02:35,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 352 transitions, 6042 flow [2024-06-04 16:02:35,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 352 transitions, 5726 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 16:02:35,783 INFO L231 Difference]: Finished difference. Result has 257 places, 334 transitions, 5041 flow [2024-06-04 16:02:35,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4740, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5041, PETRI_PLACES=257, PETRI_TRANSITIONS=334} [2024-06-04 16:02:35,784 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-04 16:02:35,784 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 334 transitions, 5041 flow [2024-06-04 16:02:35,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:35,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:35,784 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] [2024-06-04 16:02:35,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 16:02:35,784 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)] === [2024-06-04 16:02:35,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:35,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1204355523, now seen corresponding path program 9 times [2024-06-04 16:02:35,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:35,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022328712] [2024-06-04 16:02:35,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:35,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:35,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:35,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:35,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:35,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022328712] [2024-06-04 16:02:35,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022328712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:35,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:35,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:02:35,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696329984] [2024-06-04 16:02:35,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:35,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:02:35,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:35,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:02:35,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:02:36,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:36,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 334 transitions, 5041 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:36,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:36,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:36,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:36,675 INFO L124 PetriNetUnfolderBase]: 2327/3910 cut-off events. [2024-06-04 16:02:36,675 INFO L125 PetriNetUnfolderBase]: For 205325/205329 co-relation queries the response was YES. [2024-06-04 16:02:36,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26746 conditions, 3910 events. 2327/3910 cut-off events. For 205325/205329 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 24462 event pairs, 548 based on Foata normal form. 4/3912 useless extension candidates. Maximal degree in co-relation 26629. Up to 3096 conditions per place. [2024-06-04 16:02:36,715 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 224 selfloop transitions, 124 changer transitions 0/354 dead transitions. [2024-06-04 16:02:36,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 354 transitions, 5915 flow [2024-06-04 16:02:36,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:36,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:36,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:02:36,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-04 16:02:36,716 INFO L175 Difference]: Start difference. First operand has 257 places, 334 transitions, 5041 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:02:36,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 354 transitions, 5915 flow [2024-06-04 16:02:37,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 354 transitions, 5674 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:37,204 INFO L231 Difference]: Finished difference. Result has 258 places, 334 transitions, 5060 flow [2024-06-04 16:02:37,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4800, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5060, PETRI_PLACES=258, PETRI_TRANSITIONS=334} [2024-06-04 16:02:37,204 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-04 16:02:37,204 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 334 transitions, 5060 flow [2024-06-04 16:02:37,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:37,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:37,204 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] [2024-06-04 16:02:37,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 16:02:37,205 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)] === [2024-06-04 16:02:37,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:37,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1712274905, now seen corresponding path program 2 times [2024-06-04 16:02:37,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:37,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423973380] [2024-06-04 16:02:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:37,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:37,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:37,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:37,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423973380] [2024-06-04 16:02:37,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423973380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:37,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:37,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:37,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433167870] [2024-06-04 16:02:37,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:37,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:37,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:37,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:37,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:37,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:37,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 334 transitions, 5060 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:37,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:37,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:37,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:38,035 INFO L124 PetriNetUnfolderBase]: 2301/3866 cut-off events. [2024-06-04 16:02:38,035 INFO L125 PetriNetUnfolderBase]: For 206044/206046 co-relation queries the response was YES. [2024-06-04 16:02:38,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25862 conditions, 3866 events. 2301/3866 cut-off events. For 206044/206046 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24027 event pairs, 359 based on Foata normal form. 14/3872 useless extension candidates. Maximal degree in co-relation 25744. Up to 2936 conditions per place. [2024-06-04 16:02:38,075 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 281 selfloop transitions, 76 changer transitions 0/363 dead transitions. [2024-06-04 16:02:38,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 363 transitions, 6049 flow [2024-06-04 16:02:38,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:38,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 16:02:38,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-04 16:02:38,076 INFO L175 Difference]: Start difference. First operand has 258 places, 334 transitions, 5060 flow. Second operand 6 states and 152 transitions. [2024-06-04 16:02:38,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 363 transitions, 6049 flow [2024-06-04 16:02:38,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 363 transitions, 5721 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:02:38,585 INFO L231 Difference]: Finished difference. Result has 259 places, 336 transitions, 4968 flow [2024-06-04 16:02:38,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4734, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4968, PETRI_PLACES=259, PETRI_TRANSITIONS=336} [2024-06-04 16:02:38,585 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-04 16:02:38,585 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 336 transitions, 4968 flow [2024-06-04 16:02:38,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:38,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:38,586 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] [2024-06-04 16:02:38,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 16:02:38,586 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)] === [2024-06-04 16:02:38,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:38,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1269446105, now seen corresponding path program 3 times [2024-06-04 16:02:38,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:38,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867439448] [2024-06-04 16:02:38,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:38,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:38,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:38,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:38,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867439448] [2024-06-04 16:02:38,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867439448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:38,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:38,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:02:38,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130089243] [2024-06-04 16:02:38,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:38,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:02:38,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:38,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:02:38,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:02:38,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:38,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 336 transitions, 4968 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:38,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:38,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:38,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:39,388 INFO L124 PetriNetUnfolderBase]: 2335/3934 cut-off events. [2024-06-04 16:02:39,388 INFO L125 PetriNetUnfolderBase]: For 201950/201954 co-relation queries the response was YES. [2024-06-04 16:02:39,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26103 conditions, 3934 events. 2335/3934 cut-off events. For 201950/201954 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24523 event pairs, 424 based on Foata normal form. 14/3946 useless extension candidates. Maximal degree in co-relation 25984. Up to 2380 conditions per place. [2024-06-04 16:02:39,430 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 290 selfloop transitions, 68 changer transitions 0/364 dead transitions. [2024-06-04 16:02:39,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 364 transitions, 6116 flow [2024-06-04 16:02:39,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:02:39,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-04 16:02:39,431 INFO L175 Difference]: Start difference. First operand has 259 places, 336 transitions, 4968 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:02:39,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 364 transitions, 6116 flow [2024-06-04 16:02:39,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 364 transitions, 5981 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:39,943 INFO L231 Difference]: Finished difference. Result has 263 places, 339 transitions, 5053 flow [2024-06-04 16:02:39,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4833, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5053, PETRI_PLACES=263, PETRI_TRANSITIONS=339} [2024-06-04 16:02:39,944 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-04 16:02:39,944 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 339 transitions, 5053 flow [2024-06-04 16:02:39,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:39,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:39,944 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] [2024-06-04 16:02:39,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 16:02:39,944 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)] === [2024-06-04 16:02:39,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:39,945 INFO L85 PathProgramCache]: Analyzing trace with hash -571703117, now seen corresponding path program 1 times [2024-06-04 16:02:39,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:39,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867390322] [2024-06-04 16:02:39,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:39,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:40,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:40,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867390322] [2024-06-04 16:02:40,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867390322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:40,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:40,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:40,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710097700] [2024-06-04 16:02:40,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:40,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:40,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:40,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:40,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:40,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:40,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 339 transitions, 5053 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:40,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:40,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:40,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:40,976 INFO L124 PetriNetUnfolderBase]: 2850/4781 cut-off events. [2024-06-04 16:02:40,976 INFO L125 PetriNetUnfolderBase]: For 423765/423767 co-relation queries the response was YES. [2024-06-04 16:02:41,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36494 conditions, 4781 events. 2850/4781 cut-off events. For 423765/423767 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 30936 event pairs, 561 based on Foata normal form. 36/4812 useless extension candidates. Maximal degree in co-relation 36373. Up to 3090 conditions per place. [2024-06-04 16:02:41,128 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 288 selfloop transitions, 100 changer transitions 0/394 dead transitions. [2024-06-04 16:02:41,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 394 transitions, 6597 flow [2024-06-04 16:02:41,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:02:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:02:41,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-04 16:02:41,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-04 16:02:41,129 INFO L175 Difference]: Start difference. First operand has 263 places, 339 transitions, 5053 flow. Second operand 10 states and 236 transitions. [2024-06-04 16:02:41,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 394 transitions, 6597 flow [2024-06-04 16:02:41,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 394 transitions, 6389 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:41,711 INFO L231 Difference]: Finished difference. Result has 269 places, 344 transitions, 5242 flow [2024-06-04 16:02:41,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4845, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5242, PETRI_PLACES=269, PETRI_TRANSITIONS=344} [2024-06-04 16:02:41,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-04 16:02:41,712 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 344 transitions, 5242 flow [2024-06-04 16:02:41,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:41,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:41,712 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] [2024-06-04 16:02:41,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 16:02:41,712 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)] === [2024-06-04 16:02:41,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:41,713 INFO L85 PathProgramCache]: Analyzing trace with hash -774553951, now seen corresponding path program 2 times [2024-06-04 16:02:41,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:41,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022560838] [2024-06-04 16:02:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:41,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:41,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:41,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022560838] [2024-06-04 16:02:41,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022560838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:41,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:41,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:41,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527034388] [2024-06-04 16:02:41,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:41,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:41,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:41,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:41,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:41,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:41,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 344 transitions, 5242 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:41,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:41,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:41,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:42,692 INFO L124 PetriNetUnfolderBase]: 2982/5021 cut-off events. [2024-06-04 16:02:42,692 INFO L125 PetriNetUnfolderBase]: For 457395/457397 co-relation queries the response was YES. [2024-06-04 16:02:42,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37681 conditions, 5021 events. 2982/5021 cut-off events. For 457395/457397 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 32852 event pairs, 813 based on Foata normal form. 42/5058 useless extension candidates. Maximal degree in co-relation 37561. Up to 3884 conditions per place. [2024-06-04 16:02:42,746 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 182 selfloop transitions, 183 changer transitions 3/374 dead transitions. [2024-06-04 16:02:42,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 374 transitions, 6286 flow [2024-06-04 16:02:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-04 16:02:42,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-04 16:02:42,747 INFO L175 Difference]: Start difference. First operand has 269 places, 344 transitions, 5242 flow. Second operand 11 states and 246 transitions. [2024-06-04 16:02:42,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 374 transitions, 6286 flow [2024-06-04 16:02:43,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 374 transitions, 6094 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:43,564 INFO L231 Difference]: Finished difference. Result has 275 places, 345 transitions, 5486 flow [2024-06-04 16:02:43,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5054, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5486, PETRI_PLACES=275, PETRI_TRANSITIONS=345} [2024-06-04 16:02:43,564 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-04 16:02:43,565 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 345 transitions, 5486 flow [2024-06-04 16:02:43,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:43,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:43,565 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] [2024-06-04 16:02:43,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 16:02:43,565 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)] === [2024-06-04 16:02:43,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:43,565 INFO L85 PathProgramCache]: Analyzing trace with hash -774701821, now seen corresponding path program 3 times [2024-06-04 16:02:43,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:43,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423707618] [2024-06-04 16:02:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:43,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:43,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:43,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423707618] [2024-06-04 16:02:43,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423707618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:43,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:43,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:43,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868091443] [2024-06-04 16:02:43,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:43,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:43,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:43,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:43,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:43,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:43,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 345 transitions, 5486 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:43,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:43,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:43,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:44,664 INFO L124 PetriNetUnfolderBase]: 3214/5415 cut-off events. [2024-06-04 16:02:44,664 INFO L125 PetriNetUnfolderBase]: For 504879/504881 co-relation queries the response was YES. [2024-06-04 16:02:44,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41775 conditions, 5415 events. 3214/5415 cut-off events. For 504879/504881 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 36057 event pairs, 814 based on Foata normal form. 36/5446 useless extension candidates. Maximal degree in co-relation 41653. Up to 3886 conditions per place. [2024-06-04 16:02:44,725 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 197 selfloop transitions, 181 changer transitions 0/384 dead transitions. [2024-06-04 16:02:44,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 384 transitions, 6812 flow [2024-06-04 16:02:44,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:02:44,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:02:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-04 16:02:44,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565410199556541 [2024-06-04 16:02:44,726 INFO L175 Difference]: Start difference. First operand has 275 places, 345 transitions, 5486 flow. Second operand 11 states and 251 transitions. [2024-06-04 16:02:44,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 384 transitions, 6812 flow [2024-06-04 16:02:45,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 384 transitions, 6398 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-04 16:02:45,583 INFO L231 Difference]: Finished difference. Result has 278 places, 349 transitions, 5604 flow [2024-06-04 16:02:45,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5072, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5604, PETRI_PLACES=278, PETRI_TRANSITIONS=349} [2024-06-04 16:02:45,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-04 16:02:45,583 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 349 transitions, 5604 flow [2024-06-04 16:02:45,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:45,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:45,583 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] [2024-06-04 16:02:45,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 16:02:45,584 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)] === [2024-06-04 16:02:45,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:45,584 INFO L85 PathProgramCache]: Analyzing trace with hash -794557965, now seen corresponding path program 4 times [2024-06-04 16:02:45,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:45,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232853536] [2024-06-04 16:02:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:45,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:45,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:45,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:45,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232853536] [2024-06-04 16:02:45,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232853536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:45,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:45,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:45,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687639034] [2024-06-04 16:02:45,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:45,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:45,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:45,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:45,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:45,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:45,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 349 transitions, 5604 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:45,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:45,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:45,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:46,853 INFO L124 PetriNetUnfolderBase]: 3478/5850 cut-off events. [2024-06-04 16:02:46,853 INFO L125 PetriNetUnfolderBase]: For 646634/646636 co-relation queries the response was YES. [2024-06-04 16:02:46,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44676 conditions, 5850 events. 3478/5850 cut-off events. For 646634/646636 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39652 event pairs, 993 based on Foata normal form. 84/5931 useless extension candidates. Maximal degree in co-relation 44552. Up to 4675 conditions per place. [2024-06-04 16:02:46,923 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 141 changer transitions 4/377 dead transitions. [2024-06-04 16:02:46,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 377 transitions, 6558 flow [2024-06-04 16:02:46,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-04 16:02:46,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-04 16:02:46,924 INFO L175 Difference]: Start difference. First operand has 278 places, 349 transitions, 5604 flow. Second operand 9 states and 206 transitions. [2024-06-04 16:02:46,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 377 transitions, 6558 flow [2024-06-04 16:02:47,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 377 transitions, 6241 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:47,827 INFO L231 Difference]: Finished difference. Result has 280 places, 350 transitions, 5667 flow [2024-06-04 16:02:47,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5287, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5667, PETRI_PLACES=280, PETRI_TRANSITIONS=350} [2024-06-04 16:02:47,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-04 16:02:47,827 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 350 transitions, 5667 flow [2024-06-04 16:02:47,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:47,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:47,828 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] [2024-06-04 16:02:47,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 16:02:47,828 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)] === [2024-06-04 16:02:47,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:47,828 INFO L85 PathProgramCache]: Analyzing trace with hash -799920345, now seen corresponding path program 5 times [2024-06-04 16:02:47,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:47,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360094267] [2024-06-04 16:02:47,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:47,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:47,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:48,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:48,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360094267] [2024-06-04 16:02:48,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360094267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:48,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:48,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:48,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578952637] [2024-06-04 16:02:48,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:48,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:48,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:48,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:48,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:48,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:48,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 350 transitions, 5667 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:48,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:48,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:48,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:49,043 INFO L124 PetriNetUnfolderBase]: 3696/6248 cut-off events. [2024-06-04 16:02:49,043 INFO L125 PetriNetUnfolderBase]: For 657562/657564 co-relation queries the response was YES. [2024-06-04 16:02:49,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46801 conditions, 6248 events. 3696/6248 cut-off events. For 657562/657564 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 42982 event pairs, 1111 based on Foata normal form. 84/6329 useless extension candidates. Maximal degree in co-relation 46675. Up to 5041 conditions per place. [2024-06-04 16:02:49,230 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 129 changer transitions 4/376 dead transitions. [2024-06-04 16:02:49,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 376 transitions, 6621 flow [2024-06-04 16:02:49,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:49,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:49,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:02:49,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:02:49,231 INFO L175 Difference]: Start difference. First operand has 280 places, 350 transitions, 5667 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:02:49,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 376 transitions, 6621 flow [2024-06-04 16:02:50,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 376 transitions, 6256 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:50,216 INFO L231 Difference]: Finished difference. Result has 280 places, 351 transitions, 5662 flow [2024-06-04 16:02:50,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5302, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5662, PETRI_PLACES=280, PETRI_TRANSITIONS=351} [2024-06-04 16:02:50,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-04 16:02:50,216 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 351 transitions, 5662 flow [2024-06-04 16:02:50,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:50,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:50,216 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] [2024-06-04 16:02:50,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 16:02:50,217 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)] === [2024-06-04 16:02:50,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash -430155183, now seen corresponding path program 6 times [2024-06-04 16:02:50,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:50,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939870588] [2024-06-04 16:02:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:50,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:50,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:50,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:50,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939870588] [2024-06-04 16:02:50,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939870588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:50,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:50,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:50,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007057100] [2024-06-04 16:02:50,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:50,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:50,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:50,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:50,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:50,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:50,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 351 transitions, 5662 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:50,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:50,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:50,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:51,591 INFO L124 PetriNetUnfolderBase]: 4042/6886 cut-off events. [2024-06-04 16:02:51,591 INFO L125 PetriNetUnfolderBase]: For 690553/690555 co-relation queries the response was YES. [2024-06-04 16:02:51,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51460 conditions, 6886 events. 4042/6886 cut-off events. For 690553/690555 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 48789 event pairs, 971 based on Foata normal form. 72/6955 useless extension candidates. Maximal degree in co-relation 51333. Up to 3969 conditions per place. [2024-06-04 16:02:51,672 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 249 selfloop transitions, 135 changer transitions 0/390 dead transitions. [2024-06-04 16:02:51,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 390 transitions, 6972 flow [2024-06-04 16:02:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:02:51,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:02:51,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 16:02:51,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-04 16:02:51,673 INFO L175 Difference]: Start difference. First operand has 280 places, 351 transitions, 5662 flow. Second operand 7 states and 177 transitions. [2024-06-04 16:02:51,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 390 transitions, 6972 flow [2024-06-04 16:02:52,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 390 transitions, 6625 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-04 16:02:52,837 INFO L231 Difference]: Finished difference. Result has 283 places, 356 transitions, 5858 flow [2024-06-04 16:02:52,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5315, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5858, PETRI_PLACES=283, PETRI_TRANSITIONS=356} [2024-06-04 16:02:52,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-04 16:02:52,837 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 356 transitions, 5858 flow [2024-06-04 16:02:52,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:52,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:52,838 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] [2024-06-04 16:02:52,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 16:02:52,838 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)] === [2024-06-04 16:02:52,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:52,838 INFO L85 PathProgramCache]: Analyzing trace with hash -424429731, now seen corresponding path program 1 times [2024-06-04 16:02:52,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:52,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208704501] [2024-06-04 16:02:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:52,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:53,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:53,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:53,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208704501] [2024-06-04 16:02:53,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208704501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:53,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:53,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:53,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429263153] [2024-06-04 16:02:53,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:53,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:53,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:53,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:53,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:53,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:53,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 356 transitions, 5858 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:53,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:53,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:53,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:54,204 INFO L124 PetriNetUnfolderBase]: 4150/7088 cut-off events. [2024-06-04 16:02:54,204 INFO L125 PetriNetUnfolderBase]: For 622114/622116 co-relation queries the response was YES. [2024-06-04 16:02:54,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52474 conditions, 7088 events. 4150/7088 cut-off events. For 622114/622116 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 50551 event pairs, 1279 based on Foata normal form. 36/7121 useless extension candidates. Maximal degree in co-relation 52345. Up to 5239 conditions per place. [2024-06-04 16:02:54,289 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 231 selfloop transitions, 145 changer transitions 7/389 dead transitions. [2024-06-04 16:02:54,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 389 transitions, 6858 flow [2024-06-04 16:02:54,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-04 16:02:54,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-04 16:02:54,290 INFO L175 Difference]: Start difference. First operand has 283 places, 356 transitions, 5858 flow. Second operand 9 states and 209 transitions. [2024-06-04 16:02:54,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 389 transitions, 6858 flow [2024-06-04 16:02:55,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 389 transitions, 6482 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-04 16:02:55,676 INFO L231 Difference]: Finished difference. Result has 288 places, 356 transitions, 5829 flow [2024-06-04 16:02:55,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5482, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5829, PETRI_PLACES=288, PETRI_TRANSITIONS=356} [2024-06-04 16:02:55,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-04 16:02:55,677 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 356 transitions, 5829 flow [2024-06-04 16:02:55,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:55,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:55,677 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] [2024-06-04 16:02:55,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 16:02:55,677 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)] === [2024-06-04 16:02:55,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:55,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1535173889, now seen corresponding path program 7 times [2024-06-04 16:02:55,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:55,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225563214] [2024-06-04 16:02:55,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:55,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:55,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:55,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:55,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225563214] [2024-06-04 16:02:55,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225563214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:55,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:55,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:55,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378525061] [2024-06-04 16:02:55,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:55,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:55,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:55,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:55,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:55,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:55,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 356 transitions, 5829 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:55,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:55,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:55,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:57,145 INFO L124 PetriNetUnfolderBase]: 4204/7193 cut-off events. [2024-06-04 16:02:57,145 INFO L125 PetriNetUnfolderBase]: For 617116/617120 co-relation queries the response was YES. [2024-06-04 16:02:57,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51070 conditions, 7193 events. 4204/7193 cut-off events. For 617116/617120 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 51723 event pairs, 1394 based on Foata normal form. 44/7235 useless extension candidates. Maximal degree in co-relation 50940. Up to 6009 conditions per place. [2024-06-04 16:02:57,229 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 144 changer transitions 3/381 dead transitions. [2024-06-04 16:02:57,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 381 transitions, 6900 flow [2024-06-04 16:02:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:02:57,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:02:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-04 16:02:57,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-04 16:02:57,230 INFO L175 Difference]: Start difference. First operand has 288 places, 356 transitions, 5829 flow. Second operand 9 states and 203 transitions. [2024-06-04 16:02:57,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 381 transitions, 6900 flow [2024-06-04 16:02:58,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 381 transitions, 6535 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-04 16:02:58,610 INFO L231 Difference]: Finished difference. Result has 290 places, 357 transitions, 5833 flow [2024-06-04 16:02:58,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5464, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5833, PETRI_PLACES=290, PETRI_TRANSITIONS=357} [2024-06-04 16:02:58,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-04 16:02:58,610 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 357 transitions, 5833 flow [2024-06-04 16:02:58,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:58,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:58,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:58,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 16:02:58,611 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)] === [2024-06-04 16:02:58,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:58,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1534958687, now seen corresponding path program 2 times [2024-06-04 16:02:58,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:58,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830341879] [2024-06-04 16:02:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:58,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:58,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:58,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:58,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830341879] [2024-06-04 16:02:58,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830341879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:58,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:58,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:02:58,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605284933] [2024-06-04 16:02:58,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:58,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:02:58,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:58,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:02:58,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:02:58,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:02:58,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 357 transitions, 5833 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:58,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:58,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:02:58,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:00,060 INFO L124 PetriNetUnfolderBase]: 4302/7383 cut-off events. [2024-06-04 16:03:00,060 INFO L125 PetriNetUnfolderBase]: For 616861/616865 co-relation queries the response was YES. [2024-06-04 16:03:00,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51870 conditions, 7383 events. 4302/7383 cut-off events. For 616861/616865 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 53565 event pairs, 1394 based on Foata normal form. 38/7419 useless extension candidates. Maximal degree in co-relation 51739. Up to 5965 conditions per place. [2024-06-04 16:03:00,147 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 229 selfloop transitions, 146 changer transitions 8/389 dead transitions. [2024-06-04 16:03:00,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 389 transitions, 6983 flow [2024-06-04 16:03:00,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:00,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:00,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-04 16:03:00,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:03:00,148 INFO L175 Difference]: Start difference. First operand has 290 places, 357 transitions, 5833 flow. Second operand 10 states and 225 transitions. [2024-06-04 16:03:00,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 389 transitions, 6983 flow [2024-06-04 16:03:01,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 389 transitions, 6631 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:01,261 INFO L231 Difference]: Finished difference. Result has 293 places, 356 transitions, 5839 flow [2024-06-04 16:03:01,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5481, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5839, PETRI_PLACES=293, PETRI_TRANSITIONS=356} [2024-06-04 16:03:01,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-04 16:03:01,262 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 356 transitions, 5839 flow [2024-06-04 16:03:01,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:01,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:01,262 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] [2024-06-04 16:03:01,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 16:03:01,262 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)] === [2024-06-04 16:03:01,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:01,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1269261407, now seen corresponding path program 3 times [2024-06-04 16:03:01,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:01,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603205496] [2024-06-04 16:03:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:01,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:01,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:01,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:01,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603205496] [2024-06-04 16:03:01,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603205496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:01,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:01,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:01,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576943894] [2024-06-04 16:03:01,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:01,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:01,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:01,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:01,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:01,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:01,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 356 transitions, 5839 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:01,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:01,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:01,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:02,792 INFO L124 PetriNetUnfolderBase]: 4328/7421 cut-off events. [2024-06-04 16:03:02,793 INFO L125 PetriNetUnfolderBase]: For 685242/685246 co-relation queries the response was YES. [2024-06-04 16:03:02,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53339 conditions, 7421 events. 4328/7421 cut-off events. For 685242/685246 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 53432 event pairs, 1386 based on Foata normal form. 38/7457 useless extension candidates. Maximal degree in co-relation 53207. Up to 4541 conditions per place. [2024-06-04 16:03:02,870 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 150 changer transitions 11/391 dead transitions. [2024-06-04 16:03:02,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 391 transitions, 7133 flow [2024-06-04 16:03:02,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:02,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:02,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 16:03:02,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-04 16:03:02,871 INFO L175 Difference]: Start difference. First operand has 293 places, 356 transitions, 5839 flow. Second operand 9 states and 211 transitions. [2024-06-04 16:03:02,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 391 transitions, 7133 flow [2024-06-04 16:03:04,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 391 transitions, 6754 flow, removed 45 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:04,065 INFO L231 Difference]: Finished difference. Result has 294 places, 352 transitions, 5782 flow [2024-06-04 16:03:04,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5460, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5782, PETRI_PLACES=294, PETRI_TRANSITIONS=352} [2024-06-04 16:03:04,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-04 16:03:04,066 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 352 transitions, 5782 flow [2024-06-04 16:03:04,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:04,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:04,066 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, 1] [2024-06-04 16:03:04,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 16:03:04,067 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)] === [2024-06-04 16:03:04,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:04,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1685958770, now seen corresponding path program 1 times [2024-06-04 16:03:04,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:04,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870890427] [2024-06-04 16:03:04,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:04,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:04,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:04,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:04,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870890427] [2024-06-04 16:03:04,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870890427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:04,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:04,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:04,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118312713] [2024-06-04 16:03:04,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:04,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:04,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:04,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:04,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:04,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:04,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 352 transitions, 5782 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:04,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:04,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:04,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:05,491 INFO L124 PetriNetUnfolderBase]: 4153/7061 cut-off events. [2024-06-04 16:03:05,491 INFO L125 PetriNetUnfolderBase]: For 610397/610397 co-relation queries the response was YES. [2024-06-04 16:03:05,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51811 conditions, 7061 events. 4153/7061 cut-off events. For 610397/610397 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 50478 event pairs, 1232 based on Foata normal form. 10/7029 useless extension candidates. Maximal degree in co-relation 51678. Up to 6180 conditions per place. [2024-06-04 16:03:05,575 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 332 selfloop transitions, 54 changer transitions 4/396 dead transitions. [2024-06-04 16:03:05,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 396 transitions, 7034 flow [2024-06-04 16:03:05,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:05,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:05,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-04 16:03:05,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:03:05,576 INFO L175 Difference]: Start difference. First operand has 294 places, 352 transitions, 5782 flow. Second operand 10 states and 225 transitions. [2024-06-04 16:03:05,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 396 transitions, 7034 flow [2024-06-04 16:03:06,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 396 transitions, 6592 flow, removed 47 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:06,907 INFO L231 Difference]: Finished difference. Result has 296 places, 357 transitions, 5632 flow [2024-06-04 16:03:06,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5340, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5632, PETRI_PLACES=296, PETRI_TRANSITIONS=357} [2024-06-04 16:03:06,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-04 16:03:06,907 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 357 transitions, 5632 flow [2024-06-04 16:03:06,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:06,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:06,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:06,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 16:03:06,908 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)] === [2024-06-04 16:03:06,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:06,908 INFO L85 PathProgramCache]: Analyzing trace with hash -712420212, now seen corresponding path program 2 times [2024-06-04 16:03:06,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:06,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341452434] [2024-06-04 16:03:06,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:06,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:06,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:07,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:07,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:07,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341452434] [2024-06-04 16:03:07,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341452434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:07,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:07,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:07,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740009686] [2024-06-04 16:03:07,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:07,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:07,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:07,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:07,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:07,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:07,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 357 transitions, 5632 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:07,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:07,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:07,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:08,236 INFO L124 PetriNetUnfolderBase]: 3931/6712 cut-off events. [2024-06-04 16:03:08,236 INFO L125 PetriNetUnfolderBase]: For 509251/509251 co-relation queries the response was YES. [2024-06-04 16:03:08,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46646 conditions, 6712 events. 3931/6712 cut-off events. For 509251/509251 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 47527 event pairs, 1207 based on Foata normal form. 10/6714 useless extension candidates. Maximal degree in co-relation 46513. Up to 5668 conditions per place. [2024-06-04 16:03:08,314 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 201 selfloop transitions, 179 changer transitions 4/390 dead transitions. [2024-06-04 16:03:08,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 390 transitions, 6658 flow [2024-06-04 16:03:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:08,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:08,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 263 transitions. [2024-06-04 16:03:08,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5345528455284553 [2024-06-04 16:03:08,315 INFO L175 Difference]: Start difference. First operand has 296 places, 357 transitions, 5632 flow. Second operand 12 states and 263 transitions. [2024-06-04 16:03:08,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 390 transitions, 6658 flow [2024-06-04 16:03:09,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 390 transitions, 6517 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:09,440 INFO L231 Difference]: Finished difference. Result has 303 places, 356 transitions, 5836 flow [2024-06-04 16:03:09,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5493, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5836, PETRI_PLACES=303, PETRI_TRANSITIONS=356} [2024-06-04 16:03:09,440 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-04 16:03:09,440 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 356 transitions, 5836 flow [2024-06-04 16:03:09,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:09,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:09,440 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] [2024-06-04 16:03:09,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 16:03:09,441 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)] === [2024-06-04 16:03:09,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:09,441 INFO L85 PathProgramCache]: Analyzing trace with hash 479144752, now seen corresponding path program 3 times [2024-06-04 16:03:09,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:09,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172215851] [2024-06-04 16:03:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:09,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:09,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:09,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172215851] [2024-06-04 16:03:09,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172215851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:09,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:09,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:09,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782940231] [2024-06-04 16:03:09,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:09,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:09,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:09,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:09,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:09,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:09,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 356 transitions, 5836 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:09,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:09,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:09,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:10,889 INFO L124 PetriNetUnfolderBase]: 3801/6453 cut-off events. [2024-06-04 16:03:10,890 INFO L125 PetriNetUnfolderBase]: For 512633/512635 co-relation queries the response was YES. [2024-06-04 16:03:10,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42558 conditions, 6453 events. 3801/6453 cut-off events. For 512633/512635 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 45240 event pairs, 1045 based on Foata normal form. 56/6481 useless extension candidates. Maximal degree in co-relation 42424. Up to 5453 conditions per place. [2024-06-04 16:03:10,962 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 296 selfloop transitions, 83 changer transitions 5/390 dead transitions. [2024-06-04 16:03:10,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 390 transitions, 6787 flow [2024-06-04 16:03:10,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:10,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 16:03:10,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-04 16:03:10,964 INFO L175 Difference]: Start difference. First operand has 303 places, 356 transitions, 5836 flow. Second operand 7 states and 178 transitions. [2024-06-04 16:03:10,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 390 transitions, 6787 flow [2024-06-04 16:03:11,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 390 transitions, 6371 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:11,802 INFO L231 Difference]: Finished difference. Result has 300 places, 355 transitions, 5604 flow [2024-06-04 16:03:11,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5420, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5604, PETRI_PLACES=300, PETRI_TRANSITIONS=355} [2024-06-04 16:03:11,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-04 16:03:11,803 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 355 transitions, 5604 flow [2024-06-04 16:03:11,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:11,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:11,803 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] [2024-06-04 16:03:11,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 16:03:11,803 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)] === [2024-06-04 16:03:11,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash -887915025, now seen corresponding path program 1 times [2024-06-04 16:03:11,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:11,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202167226] [2024-06-04 16:03:11,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:11,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:11,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:11,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:11,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202167226] [2024-06-04 16:03:11,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202167226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:11,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:11,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:11,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224463593] [2024-06-04 16:03:11,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:11,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:11,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:11,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:11,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:12,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:12,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 355 transitions, 5604 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:12,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:12,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:12,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:12,943 INFO L124 PetriNetUnfolderBase]: 3742/6399 cut-off events. [2024-06-04 16:03:12,943 INFO L125 PetriNetUnfolderBase]: For 361613/361617 co-relation queries the response was YES. [2024-06-04 16:03:13,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41724 conditions, 6399 events. 3742/6399 cut-off events. For 361613/361617 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44893 event pairs, 1133 based on Foata normal form. 5/6402 useless extension candidates. Maximal degree in co-relation 41589. Up to 5395 conditions per place. [2024-06-04 16:03:13,026 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 225 selfloop transitions, 155 changer transitions 0/386 dead transitions. [2024-06-04 16:03:13,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 386 transitions, 6794 flow [2024-06-04 16:03:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-04 16:03:13,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-04 16:03:13,027 INFO L175 Difference]: Start difference. First operand has 300 places, 355 transitions, 5604 flow. Second operand 10 states and 219 transitions. [2024-06-04 16:03:13,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 386 transitions, 6794 flow [2024-06-04 16:03:13,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 386 transitions, 6593 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:13,995 INFO L231 Difference]: Finished difference. Result has 305 places, 361 transitions, 5777 flow [2024-06-04 16:03:13,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5403, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5777, PETRI_PLACES=305, PETRI_TRANSITIONS=361} [2024-06-04 16:03:13,996 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-04 16:03:13,996 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 361 transitions, 5777 flow [2024-06-04 16:03:13,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:13,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:13,996 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] [2024-06-04 16:03:13,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 16:03:13,996 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)] === [2024-06-04 16:03:13,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:13,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1692362843, now seen corresponding path program 2 times [2024-06-04 16:03:13,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:13,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285773574] [2024-06-04 16:03:13,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:13,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:14,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:14,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285773574] [2024-06-04 16:03:14,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285773574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:14,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:14,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:14,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72910646] [2024-06-04 16:03:14,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:14,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:14,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:14,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:14,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:14,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:14,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 361 transitions, 5777 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:14,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:14,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:14,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:15,305 INFO L124 PetriNetUnfolderBase]: 3747/6405 cut-off events. [2024-06-04 16:03:15,305 INFO L125 PetriNetUnfolderBase]: For 365515/365519 co-relation queries the response was YES. [2024-06-04 16:03:15,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41596 conditions, 6405 events. 3747/6405 cut-off events. For 365515/365519 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44948 event pairs, 1127 based on Foata normal form. 3/6406 useless extension candidates. Maximal degree in co-relation 41460. Up to 5401 conditions per place. [2024-06-04 16:03:15,386 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 220 selfloop transitions, 160 changer transitions 0/386 dead transitions. [2024-06-04 16:03:15,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 386 transitions, 6934 flow [2024-06-04 16:03:15,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-04 16:03:15,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-04 16:03:15,387 INFO L175 Difference]: Start difference. First operand has 305 places, 361 transitions, 5777 flow. Second operand 10 states and 214 transitions. [2024-06-04 16:03:15,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 386 transitions, 6934 flow [2024-06-04 16:03:16,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 386 transitions, 6695 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:16,497 INFO L231 Difference]: Finished difference. Result has 309 places, 364 transitions, 5894 flow [2024-06-04 16:03:16,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5541, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5894, PETRI_PLACES=309, PETRI_TRANSITIONS=364} [2024-06-04 16:03:16,498 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-04 16:03:16,498 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 364 transitions, 5894 flow [2024-06-04 16:03:16,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:16,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:16,498 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] [2024-06-04 16:03:16,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 16:03:16,499 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)] === [2024-06-04 16:03:16,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash 141300645, now seen corresponding path program 3 times [2024-06-04 16:03:16,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:16,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360962424] [2024-06-04 16:03:16,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:16,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:16,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:16,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:16,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360962424] [2024-06-04 16:03:16,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360962424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:16,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:16,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:16,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634141835] [2024-06-04 16:03:16,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:16,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:16,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:16,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:16,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:16,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:16,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 364 transitions, 5894 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:16,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:16,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:16,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:17,687 INFO L124 PetriNetUnfolderBase]: 3752/6414 cut-off events. [2024-06-04 16:03:17,687 INFO L125 PetriNetUnfolderBase]: For 374059/374063 co-relation queries the response was YES. [2024-06-04 16:03:17,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41826 conditions, 6414 events. 3752/6414 cut-off events. For 374059/374063 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 45019 event pairs, 1125 based on Foata normal form. 3/6415 useless extension candidates. Maximal degree in co-relation 41689. Up to 5407 conditions per place. [2024-06-04 16:03:17,762 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 231 selfloop transitions, 148 changer transitions 0/385 dead transitions. [2024-06-04 16:03:17,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 385 transitions, 7046 flow [2024-06-04 16:03:17,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-04 16:03:17,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-04 16:03:17,763 INFO L175 Difference]: Start difference. First operand has 309 places, 364 transitions, 5894 flow. Second operand 9 states and 197 transitions. [2024-06-04 16:03:17,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 385 transitions, 7046 flow [2024-06-04 16:03:18,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 385 transitions, 6687 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:18,772 INFO L231 Difference]: Finished difference. Result has 310 places, 367 transitions, 5871 flow [2024-06-04 16:03:18,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5541, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5871, PETRI_PLACES=310, PETRI_TRANSITIONS=367} [2024-06-04 16:03:18,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-04 16:03:18,773 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 367 transitions, 5871 flow [2024-06-04 16:03:18,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:18,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:18,773 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] [2024-06-04 16:03:18,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 16:03:18,773 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)] === [2024-06-04 16:03:18,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:18,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1683097253, now seen corresponding path program 4 times [2024-06-04 16:03:18,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:18,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756497709] [2024-06-04 16:03:18,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:18,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:18,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:18,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:18,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756497709] [2024-06-04 16:03:18,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756497709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:18,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:18,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:18,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953729833] [2024-06-04 16:03:18,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:18,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:18,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:18,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:18,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:18,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:18,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 367 transitions, 5871 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:18,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:18,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:18,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:20,031 INFO L124 PetriNetUnfolderBase]: 3749/6410 cut-off events. [2024-06-04 16:03:20,031 INFO L125 PetriNetUnfolderBase]: For 378328/378332 co-relation queries the response was YES. [2024-06-04 16:03:20,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41740 conditions, 6410 events. 3749/6410 cut-off events. For 378328/378332 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 45035 event pairs, 1125 based on Foata normal form. 3/6411 useless extension candidates. Maximal degree in co-relation 41602. Up to 5404 conditions per place. [2024-06-04 16:03:20,104 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 225 selfloop transitions, 153 changer transitions 0/384 dead transitions. [2024-06-04 16:03:20,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 384 transitions, 6829 flow [2024-06-04 16:03:20,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-04 16:03:20,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-04 16:03:20,105 INFO L175 Difference]: Start difference. First operand has 310 places, 367 transitions, 5871 flow. Second operand 9 states and 197 transitions. [2024-06-04 16:03:20,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 384 transitions, 6829 flow [2024-06-04 16:03:21,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 384 transitions, 6553 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:21,185 INFO L231 Difference]: Finished difference. Result has 313 places, 367 transitions, 5907 flow [2024-06-04 16:03:21,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5595, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5907, PETRI_PLACES=313, PETRI_TRANSITIONS=367} [2024-06-04 16:03:21,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-04 16:03:21,186 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 367 transitions, 5907 flow [2024-06-04 16:03:21,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:21,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:21,186 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] [2024-06-04 16:03:21,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 16:03:21,186 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)] === [2024-06-04 16:03:21,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:21,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1854871973, now seen corresponding path program 5 times [2024-06-04 16:03:21,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:21,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116351849] [2024-06-04 16:03:21,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:21,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:21,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:21,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116351849] [2024-06-04 16:03:21,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116351849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:21,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:21,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:21,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524966439] [2024-06-04 16:03:21,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:21,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:21,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:21,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:21,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:21,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:21,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 367 transitions, 5907 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:21,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:21,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:21,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:22,470 INFO L124 PetriNetUnfolderBase]: 3762/6436 cut-off events. [2024-06-04 16:03:22,470 INFO L125 PetriNetUnfolderBase]: For 391006/391012 co-relation queries the response was YES. [2024-06-04 16:03:22,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42043 conditions, 6436 events. 3762/6436 cut-off events. For 391006/391012 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 45193 event pairs, 1141 based on Foata normal form. 7/6442 useless extension candidates. Maximal degree in co-relation 41904. Up to 5732 conditions per place. [2024-06-04 16:03:22,546 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 316 selfloop transitions, 74 changer transitions 0/396 dead transitions. [2024-06-04 16:03:22,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 396 transitions, 7147 flow [2024-06-04 16:03:22,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:03:22,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:03:22,547 INFO L175 Difference]: Start difference. First operand has 313 places, 367 transitions, 5907 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:03:22,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 396 transitions, 7147 flow [2024-06-04 16:03:23,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 396 transitions, 6577 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-04 16:03:23,663 INFO L231 Difference]: Finished difference. Result has 310 places, 373 transitions, 5567 flow [2024-06-04 16:03:23,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5361, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5567, PETRI_PLACES=310, PETRI_TRANSITIONS=373} [2024-06-04 16:03:23,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-04 16:03:23,663 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 373 transitions, 5567 flow [2024-06-04 16:03:23,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:23,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:23,663 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] [2024-06-04 16:03:23,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 16:03:23,663 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)] === [2024-06-04 16:03:23,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:23,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1854877553, now seen corresponding path program 6 times [2024-06-04 16:03:23,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:23,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202570132] [2024-06-04 16:03:23,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:23,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:23,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:23,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:23,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202570132] [2024-06-04 16:03:23,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202570132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:23,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:23,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:23,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991729028] [2024-06-04 16:03:23,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:23,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:23,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:23,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:23,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:23,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:23,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 373 transitions, 5567 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:23,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:23,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:23,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:24,863 INFO L124 PetriNetUnfolderBase]: 3759/6432 cut-off events. [2024-06-04 16:03:24,863 INFO L125 PetriNetUnfolderBase]: For 391392/391398 co-relation queries the response was YES. [2024-06-04 16:03:24,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41589 conditions, 6432 events. 3759/6432 cut-off events. For 391392/391398 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 45243 event pairs, 1143 based on Foata normal form. 7/6438 useless extension candidates. Maximal degree in co-relation 41449. Up to 5729 conditions per place. [2024-06-04 16:03:24,935 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 315 selfloop transitions, 72 changer transitions 0/393 dead transitions. [2024-06-04 16:03:24,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 393 transitions, 6557 flow [2024-06-04 16:03:24,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:24,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:24,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:03:24,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-04 16:03:24,936 INFO L175 Difference]: Start difference. First operand has 310 places, 373 transitions, 5567 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:03:24,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 393 transitions, 6557 flow [2024-06-04 16:03:26,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 393 transitions, 6431 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:26,065 INFO L231 Difference]: Finished difference. Result has 312 places, 373 transitions, 5592 flow [2024-06-04 16:03:26,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5441, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5592, PETRI_PLACES=312, PETRI_TRANSITIONS=373} [2024-06-04 16:03:26,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-04 16:03:26,066 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 373 transitions, 5592 flow [2024-06-04 16:03:26,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:26,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:26,066 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, 1] [2024-06-04 16:03:26,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 16:03:26,066 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)] === [2024-06-04 16:03:26,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:26,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1198767375, now seen corresponding path program 7 times [2024-06-04 16:03:26,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:26,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155701925] [2024-06-04 16:03:26,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:26,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:26,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:26,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:26,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155701925] [2024-06-04 16:03:26,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155701925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:26,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:26,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:26,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878282085] [2024-06-04 16:03:26,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:26,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:26,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:26,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:26,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:26,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:26,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 373 transitions, 5592 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:26,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:26,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:26,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:27,267 INFO L124 PetriNetUnfolderBase]: 3764/6437 cut-off events. [2024-06-04 16:03:27,267 INFO L125 PetriNetUnfolderBase]: For 399230/399234 co-relation queries the response was YES. [2024-06-04 16:03:27,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41725 conditions, 6437 events. 3764/6437 cut-off events. For 399230/399234 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 45212 event pairs, 1150 based on Foata normal form. 3/6438 useless extension candidates. Maximal degree in co-relation 41584. Up to 5499 conditions per place. [2024-06-04 16:03:27,344 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 240 selfloop transitions, 147 changer transitions 0/393 dead transitions. [2024-06-04 16:03:27,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 393 transitions, 6768 flow [2024-06-04 16:03:27,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:27,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:27,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-04 16:03:27,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-04 16:03:27,345 INFO L175 Difference]: Start difference. First operand has 312 places, 373 transitions, 5592 flow. Second operand 8 states and 180 transitions. [2024-06-04 16:03:27,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 393 transitions, 6768 flow [2024-06-04 16:03:28,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 393 transitions, 6624 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:28,478 INFO L231 Difference]: Finished difference. Result has 315 places, 376 transitions, 5776 flow [2024-06-04 16:03:28,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5448, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5776, PETRI_PLACES=315, PETRI_TRANSITIONS=376} [2024-06-04 16:03:28,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-04 16:03:28,478 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 376 transitions, 5776 flow [2024-06-04 16:03:28,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:28,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:28,478 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] [2024-06-04 16:03:28,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 16:03:28,478 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)] === [2024-06-04 16:03:28,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1198594395, now seen corresponding path program 8 times [2024-06-04 16:03:28,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:28,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601241661] [2024-06-04 16:03:28,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:28,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:28,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:28,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601241661] [2024-06-04 16:03:28,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601241661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:28,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:28,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:28,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20578888] [2024-06-04 16:03:28,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:28,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:28,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:28,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:28,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:28,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:28,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 376 transitions, 5776 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:28,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:28,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:28,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:29,675 INFO L124 PetriNetUnfolderBase]: 3769/6446 cut-off events. [2024-06-04 16:03:29,675 INFO L125 PetriNetUnfolderBase]: For 408576/408580 co-relation queries the response was YES. [2024-06-04 16:03:29,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42101 conditions, 6446 events. 3769/6446 cut-off events. For 408576/408580 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 45312 event pairs, 1163 based on Foata normal form. 3/6447 useless extension candidates. Maximal degree in co-relation 41959. Up to 5505 conditions per place. [2024-06-04 16:03:29,747 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 257 selfloop transitions, 131 changer transitions 0/394 dead transitions. [2024-06-04 16:03:29,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 394 transitions, 6960 flow [2024-06-04 16:03:29,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:29,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 16:03:29,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-04 16:03:29,748 INFO L175 Difference]: Start difference. First operand has 315 places, 376 transitions, 5776 flow. Second operand 6 states and 141 transitions. [2024-06-04 16:03:29,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 394 transitions, 6960 flow [2024-06-04 16:03:30,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 394 transitions, 6716 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:30,964 INFO L231 Difference]: Finished difference. Result has 317 places, 379 transitions, 5833 flow [2024-06-04 16:03:30,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5535, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5833, PETRI_PLACES=317, PETRI_TRANSITIONS=379} [2024-06-04 16:03:30,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-04 16:03:30,965 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 379 transitions, 5833 flow [2024-06-04 16:03:30,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:30,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:30,965 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] [2024-06-04 16:03:30,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 16:03:30,965 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)] === [2024-06-04 16:03:30,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:30,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1198583235, now seen corresponding path program 9 times [2024-06-04 16:03:30,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:30,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027353441] [2024-06-04 16:03:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:30,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:31,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:31,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027353441] [2024-06-04 16:03:31,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027353441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:31,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:31,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:31,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903561834] [2024-06-04 16:03:31,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:31,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:31,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:31,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:31,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:31,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:31,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 379 transitions, 5833 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:31,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:31,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:31,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:32,152 INFO L124 PetriNetUnfolderBase]: 3766/6442 cut-off events. [2024-06-04 16:03:32,152 INFO L125 PetriNetUnfolderBase]: For 413547/413551 co-relation queries the response was YES. [2024-06-04 16:03:32,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42108 conditions, 6442 events. 3766/6442 cut-off events. For 413547/413551 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 45273 event pairs, 1163 based on Foata normal form. 3/6443 useless extension candidates. Maximal degree in co-relation 41965. Up to 5502 conditions per place. [2024-06-04 16:03:32,229 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 258 selfloop transitions, 132 changer transitions 0/396 dead transitions. [2024-06-04 16:03:32,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 396 transitions, 6827 flow [2024-06-04 16:03:32,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-04 16:03:32,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-04 16:03:32,230 INFO L175 Difference]: Start difference. First operand has 317 places, 379 transitions, 5833 flow. Second operand 6 states and 143 transitions. [2024-06-04 16:03:32,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 396 transitions, 6827 flow [2024-06-04 16:03:33,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 396 transitions, 6565 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:33,413 INFO L231 Difference]: Finished difference. Result has 319 places, 379 transitions, 5843 flow [2024-06-04 16:03:33,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5571, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5843, PETRI_PLACES=319, PETRI_TRANSITIONS=379} [2024-06-04 16:03:33,413 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-04 16:03:33,413 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 379 transitions, 5843 flow [2024-06-04 16:03:33,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:33,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:33,414 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] [2024-06-04 16:03:33,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 16:03:33,414 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)] === [2024-06-04 16:03:33,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:33,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1198761795, now seen corresponding path program 10 times [2024-06-04 16:03:33,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:33,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493474484] [2024-06-04 16:03:33,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:33,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:33,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:33,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493474484] [2024-06-04 16:03:33,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493474484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:33,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:33,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:33,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270905275] [2024-06-04 16:03:33,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:33,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:33,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:33,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:33,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:33,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:33,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 379 transitions, 5843 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:33,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:33,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:33,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:34,651 INFO L124 PetriNetUnfolderBase]: 3763/6438 cut-off events. [2024-06-04 16:03:34,651 INFO L125 PetriNetUnfolderBase]: For 417950/417954 co-relation queries the response was YES. [2024-06-04 16:03:34,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42118 conditions, 6438 events. 3763/6438 cut-off events. For 417950/417954 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 45247 event pairs, 1150 based on Foata normal form. 3/6439 useless extension candidates. Maximal degree in co-relation 41974. Up to 5499 conditions per place. [2024-06-04 16:03:34,727 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 234 selfloop transitions, 155 changer transitions 0/395 dead transitions. [2024-06-04 16:03:34,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 395 transitions, 6659 flow [2024-06-04 16:03:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-04 16:03:34,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-04 16:03:34,728 INFO L175 Difference]: Start difference. First operand has 319 places, 379 transitions, 5843 flow. Second operand 9 states and 193 transitions. [2024-06-04 16:03:34,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 395 transitions, 6659 flow [2024-06-04 16:03:36,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 395 transitions, 6371 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:36,020 INFO L231 Difference]: Finished difference. Result has 323 places, 379 transitions, 5871 flow [2024-06-04 16:03:36,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5555, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5871, PETRI_PLACES=323, PETRI_TRANSITIONS=379} [2024-06-04 16:03:36,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-04 16:03:36,021 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 379 transitions, 5871 flow [2024-06-04 16:03:36,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:36,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:36,021 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] [2024-06-04 16:03:36,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 16:03:36,021 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)] === [2024-06-04 16:03:36,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:36,022 INFO L85 PathProgramCache]: Analyzing trace with hash -201049202, now seen corresponding path program 4 times [2024-06-04 16:03:36,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:36,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392361256] [2024-06-04 16:03:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:36,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:36,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:36,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392361256] [2024-06-04 16:03:36,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392361256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:36,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:36,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:36,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746130991] [2024-06-04 16:03:36,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:36,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:36,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:36,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:36,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:36,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:36,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 379 transitions, 5871 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:36,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:36,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:36,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:37,349 INFO L124 PetriNetUnfolderBase]: 3889/6611 cut-off events. [2024-06-04 16:03:37,349 INFO L125 PetriNetUnfolderBase]: For 515239/515241 co-relation queries the response was YES. [2024-06-04 16:03:37,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45961 conditions, 6611 events. 3889/6611 cut-off events. For 515239/515241 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 46329 event pairs, 1164 based on Foata normal form. 2/6608 useless extension candidates. Maximal degree in co-relation 45816. Up to 5767 conditions per place. [2024-06-04 16:03:37,431 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 95 changer transitions 0/421 dead transitions. [2024-06-04 16:03:37,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 421 transitions, 7215 flow [2024-06-04 16:03:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:37,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:37,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-04 16:03:37,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532150776053215 [2024-06-04 16:03:37,432 INFO L175 Difference]: Start difference. First operand has 323 places, 379 transitions, 5871 flow. Second operand 11 states and 240 transitions. [2024-06-04 16:03:37,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 421 transitions, 7215 flow [2024-06-04 16:03:38,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 421 transitions, 6795 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-04 16:03:38,620 INFO L231 Difference]: Finished difference. Result has 324 places, 385 transitions, 5867 flow [2024-06-04 16:03:38,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5458, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5867, PETRI_PLACES=324, PETRI_TRANSITIONS=385} [2024-06-04 16:03:38,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-04 16:03:38,620 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 385 transitions, 5867 flow [2024-06-04 16:03:38,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:38,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:38,621 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] [2024-06-04 16:03:38,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 16:03:38,621 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)] === [2024-06-04 16:03:38,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:38,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1515347014, now seen corresponding path program 5 times [2024-06-04 16:03:38,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:38,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405405289] [2024-06-04 16:03:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:38,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:38,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:38,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405405289] [2024-06-04 16:03:38,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405405289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:38,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:38,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:38,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447569309] [2024-06-04 16:03:38,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:38,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:38,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:38,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:38,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:38,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:38,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 385 transitions, 5867 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:38,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:38,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:38,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:40,012 INFO L124 PetriNetUnfolderBase]: 4028/6824 cut-off events. [2024-06-04 16:03:40,013 INFO L125 PetriNetUnfolderBase]: For 624713/624715 co-relation queries the response was YES. [2024-06-04 16:03:40,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50424 conditions, 6824 events. 4028/6824 cut-off events. For 624713/624715 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 47935 event pairs, 1211 based on Foata normal form. 2/6820 useless extension candidates. Maximal degree in co-relation 50277. Up to 5666 conditions per place. [2024-06-04 16:03:40,098 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 213 selfloop transitions, 207 changer transitions 0/426 dead transitions. [2024-06-04 16:03:40,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 426 transitions, 7238 flow [2024-06-04 16:03:40,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:40,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-04 16:03:40,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:03:40,099 INFO L175 Difference]: Start difference. First operand has 324 places, 385 transitions, 5867 flow. Second operand 12 states and 264 transitions. [2024-06-04 16:03:40,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 426 transitions, 7238 flow [2024-06-04 16:03:41,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 426 transitions, 7005 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:41,827 INFO L231 Difference]: Finished difference. Result has 329 places, 392 transitions, 6328 flow [2024-06-04 16:03:41,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6328, PETRI_PLACES=329, PETRI_TRANSITIONS=392} [2024-06-04 16:03:41,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-04 16:03:41,828 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 392 transitions, 6328 flow [2024-06-04 16:03:41,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:41,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:41,828 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, 1] [2024-06-04 16:03:41,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 16:03:41,828 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)] === [2024-06-04 16:03:41,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:41,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1976376818, now seen corresponding path program 6 times [2024-06-04 16:03:41,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:41,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244400961] [2024-06-04 16:03:41,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:41,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:42,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:42,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244400961] [2024-06-04 16:03:42,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244400961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:42,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:42,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:42,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814312885] [2024-06-04 16:03:42,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:42,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:42,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:42,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:42,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:42,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 392 transitions, 6328 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:42,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:42,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:42,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:43,207 INFO L124 PetriNetUnfolderBase]: 4036/6837 cut-off events. [2024-06-04 16:03:43,207 INFO L125 PetriNetUnfolderBase]: For 639731/639733 co-relation queries the response was YES. [2024-06-04 16:03:43,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51116 conditions, 6837 events. 4036/6837 cut-off events. For 639731/639733 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 48036 event pairs, 1204 based on Foata normal form. 2/6834 useless extension candidates. Maximal degree in co-relation 50967. Up to 5827 conditions per place. [2024-06-04 16:03:43,294 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 214 selfloop transitions, 200 changer transitions 0/420 dead transitions. [2024-06-04 16:03:43,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 420 transitions, 7278 flow [2024-06-04 16:03:43,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:43,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-04 16:03:43,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-04 16:03:43,295 INFO L175 Difference]: Start difference. First operand has 329 places, 392 transitions, 6328 flow. Second operand 12 states and 254 transitions. [2024-06-04 16:03:43,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 420 transitions, 7278 flow [2024-06-04 16:03:44,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 420 transitions, 6811 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:44,833 INFO L231 Difference]: Finished difference. Result has 332 places, 394 transitions, 6330 flow [2024-06-04 16:03:44,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5861, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6330, PETRI_PLACES=332, PETRI_TRANSITIONS=394} [2024-06-04 16:03:44,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-04 16:03:44,834 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 394 transitions, 6330 flow [2024-06-04 16:03:44,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:44,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:44,834 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] [2024-06-04 16:03:44,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 16:03:44,834 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)] === [2024-06-04 16:03:44,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:44,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1962414606, now seen corresponding path program 7 times [2024-06-04 16:03:44,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:44,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054798213] [2024-06-04 16:03:44,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:44,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:45,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:45,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054798213] [2024-06-04 16:03:45,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054798213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:45,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:45,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:45,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127171735] [2024-06-04 16:03:45,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:45,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:45,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:45,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:45,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:45,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:45,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 394 transitions, 6330 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:45,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:45,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:45,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:46,321 INFO L124 PetriNetUnfolderBase]: 4103/6938 cut-off events. [2024-06-04 16:03:46,321 INFO L125 PetriNetUnfolderBase]: For 695964/695966 co-relation queries the response was YES. [2024-06-04 16:03:46,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53108 conditions, 6938 events. 4103/6938 cut-off events. For 695964/695966 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 48455 event pairs, 1076 based on Foata normal form. 2/6935 useless extension candidates. Maximal degree in co-relation 52958. Up to 3110 conditions per place. [2024-06-04 16:03:46,416 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 198 selfloop transitions, 232 changer transitions 2/438 dead transitions. [2024-06-04 16:03:46,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 438 transitions, 7856 flow [2024-06-04 16:03:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:46,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:46,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-04 16:03:46,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587583148558758 [2024-06-04 16:03:46,417 INFO L175 Difference]: Start difference. First operand has 332 places, 394 transitions, 6330 flow. Second operand 11 states and 252 transitions. [2024-06-04 16:03:46,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 438 transitions, 7856 flow [2024-06-04 16:03:48,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 438 transitions, 7411 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:48,446 INFO L231 Difference]: Finished difference. Result has 334 places, 398 transitions, 6518 flow [2024-06-04 16:03:48,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5885, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6518, PETRI_PLACES=334, PETRI_TRANSITIONS=398} [2024-06-04 16:03:48,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-04 16:03:48,447 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 398 transitions, 6518 flow [2024-06-04 16:03:48,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:48,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:48,447 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] [2024-06-04 16:03:48,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 16:03:48,447 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)] === [2024-06-04 16:03:48,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:48,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1973842446, now seen corresponding path program 8 times [2024-06-04 16:03:48,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:48,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195877878] [2024-06-04 16:03:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:48,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:48,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:48,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:48,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195877878] [2024-06-04 16:03:48,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195877878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:48,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:48,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:48,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003013181] [2024-06-04 16:03:48,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:48,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:48,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:48,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:48,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:48,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:48,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 398 transitions, 6518 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:48,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:48,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:48,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:49,884 INFO L124 PetriNetUnfolderBase]: 4078/6897 cut-off events. [2024-06-04 16:03:49,884 INFO L125 PetriNetUnfolderBase]: For 705384/705386 co-relation queries the response was YES. [2024-06-04 16:03:49,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52951 conditions, 6897 events. 4078/6897 cut-off events. For 705384/705386 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 48109 event pairs, 1083 based on Foata normal form. 8/6900 useless extension candidates. Maximal degree in co-relation 52799. Up to 3096 conditions per place. [2024-06-04 16:03:49,971 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 203 selfloop transitions, 224 changer transitions 4/437 dead transitions. [2024-06-04 16:03:49,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 437 transitions, 7726 flow [2024-06-04 16:03:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:49,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:49,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 251 transitions. [2024-06-04 16:03:49,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565410199556541 [2024-06-04 16:03:49,974 INFO L175 Difference]: Start difference. First operand has 334 places, 398 transitions, 6518 flow. Second operand 11 states and 251 transitions. [2024-06-04 16:03:49,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 437 transitions, 7726 flow [2024-06-04 16:03:51,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 437 transitions, 7243 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:51,994 INFO L231 Difference]: Finished difference. Result has 338 places, 398 transitions, 6489 flow [2024-06-04 16:03:51,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6035, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6489, PETRI_PLACES=338, PETRI_TRANSITIONS=398} [2024-06-04 16:03:51,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-04 16:03:51,994 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 398 transitions, 6489 flow [2024-06-04 16:03:51,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:51,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:51,994 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] [2024-06-04 16:03:51,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 16:03:51,995 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)] === [2024-06-04 16:03:51,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:51,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1754034494, now seen corresponding path program 9 times [2024-06-04 16:03:51,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:51,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666367687] [2024-06-04 16:03:51,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:51,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:52,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:52,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:52,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666367687] [2024-06-04 16:03:52,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666367687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:52,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:52,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:52,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725748751] [2024-06-04 16:03:52,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:52,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:52,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:52,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:52,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:52,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:52,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 398 transitions, 6489 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:52,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:52,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:52,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:53,387 INFO L124 PetriNetUnfolderBase]: 4055/6856 cut-off events. [2024-06-04 16:03:53,387 INFO L125 PetriNetUnfolderBase]: For 681688/681690 co-relation queries the response was YES. [2024-06-04 16:03:53,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51485 conditions, 6856 events. 4055/6856 cut-off events. For 681688/681690 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 48005 event pairs, 1195 based on Foata normal form. 10/6861 useless extension candidates. Maximal degree in co-relation 51332. Up to 5335 conditions per place. [2024-06-04 16:03:53,475 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 195 changer transitions 2/430 dead transitions. [2024-06-04 16:03:53,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 430 transitions, 7659 flow [2024-06-04 16:03:53,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:53,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-04 16:03:53,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432372505543237 [2024-06-04 16:03:53,476 INFO L175 Difference]: Start difference. First operand has 338 places, 398 transitions, 6489 flow. Second operand 11 states and 245 transitions. [2024-06-04 16:03:53,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 430 transitions, 7659 flow [2024-06-04 16:03:55,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 430 transitions, 7186 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:55,278 INFO L231 Difference]: Finished difference. Result has 339 places, 398 transitions, 6413 flow [2024-06-04 16:03:55,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6016, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6413, PETRI_PLACES=339, PETRI_TRANSITIONS=398} [2024-06-04 16:03:55,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-04 16:03:55,279 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 398 transitions, 6413 flow [2024-06-04 16:03:55,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:55,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:55,279 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] [2024-06-04 16:03:55,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 16:03:55,280 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)] === [2024-06-04 16:03:55,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:55,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1745463614, now seen corresponding path program 10 times [2024-06-04 16:03:55,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:55,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040826788] [2024-06-04 16:03:55,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:55,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:55,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:55,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:55,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040826788] [2024-06-04 16:03:55,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040826788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:55,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:55,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:55,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968564857] [2024-06-04 16:03:55,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:55,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:55,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:55,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:55,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:55,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:55,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 398 transitions, 6413 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:55,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:55,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:55,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:56,687 INFO L124 PetriNetUnfolderBase]: 4032/6831 cut-off events. [2024-06-04 16:03:56,687 INFO L125 PetriNetUnfolderBase]: For 647143/647145 co-relation queries the response was YES. [2024-06-04 16:03:56,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49884 conditions, 6831 events. 4032/6831 cut-off events. For 647143/647145 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 48013 event pairs, 1204 based on Foata normal form. 10/6836 useless extension candidates. Maximal degree in co-relation 49730. Up to 5791 conditions per place. [2024-06-04 16:03:56,770 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 189 changer transitions 0/423 dead transitions. [2024-06-04 16:03:56,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 423 transitions, 7331 flow [2024-06-04 16:03:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:56,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-04 16:03:56,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-04 16:03:56,771 INFO L175 Difference]: Start difference. First operand has 339 places, 398 transitions, 6413 flow. Second operand 11 states and 239 transitions. [2024-06-04 16:03:56,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 423 transitions, 7331 flow [2024-06-04 16:03:58,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 423 transitions, 6930 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:58,952 INFO L231 Difference]: Finished difference. Result has 342 places, 398 transitions, 6396 flow [2024-06-04 16:03:58,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6012, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6396, PETRI_PLACES=342, PETRI_TRANSITIONS=398} [2024-06-04 16:03:58,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-04 16:03:58,953 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 398 transitions, 6396 flow [2024-06-04 16:03:58,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:58,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:58,953 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] [2024-06-04 16:03:58,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 16:03:58,954 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)] === [2024-06-04 16:03:58,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash -616429088, now seen corresponding path program 11 times [2024-06-04 16:03:58,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:58,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668034882] [2024-06-04 16:03:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:58,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:59,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:59,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668034882] [2024-06-04 16:03:59,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668034882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:59,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:59,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:03:59,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512803513] [2024-06-04 16:03:59,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:59,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:03:59,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:59,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:03:59,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:03:59,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:03:59,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 398 transitions, 6396 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:59,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:59,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:03:59,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:00,342 INFO L124 PetriNetUnfolderBase]: 4020/6809 cut-off events. [2024-06-04 16:04:00,342 INFO L125 PetriNetUnfolderBase]: For 611695/611697 co-relation queries the response was YES. [2024-06-04 16:04:00,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49407 conditions, 6809 events. 4020/6809 cut-off events. For 611695/611697 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 47843 event pairs, 1200 based on Foata normal form. 2/6806 useless extension candidates. Maximal degree in co-relation 49252. Up to 5803 conditions per place. [2024-06-04 16:04:00,431 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 200 changer transitions 0/424 dead transitions. [2024-06-04 16:04:00,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 424 transitions, 7294 flow [2024-06-04 16:04:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:04:00,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:04:00,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2024-06-04 16:04:00,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-04 16:04:00,432 INFO L175 Difference]: Start difference. First operand has 342 places, 398 transitions, 6396 flow. Second operand 12 states and 256 transitions. [2024-06-04 16:04:00,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 424 transitions, 7294 flow [2024-06-04 16:04:02,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 424 transitions, 6905 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:02,660 INFO L231 Difference]: Finished difference. Result has 347 places, 398 transitions, 6412 flow [2024-06-04 16:04:02,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6007, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6412, PETRI_PLACES=347, PETRI_TRANSITIONS=398} [2024-06-04 16:04:02,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-04 16:04:02,661 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 398 transitions, 6412 flow [2024-06-04 16:04:02,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:02,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:02,661 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] [2024-06-04 16:04:02,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 16:04:02,662 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)] === [2024-06-04 16:04:02,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:02,662 INFO L85 PathProgramCache]: Analyzing trace with hash 2030292576, now seen corresponding path program 12 times [2024-06-04 16:04:02,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:02,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819572853] [2024-06-04 16:04:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:02,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:02,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:02,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:02,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:02,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819572853] [2024-06-04 16:04:02,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819572853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:02,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:02,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:02,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658003975] [2024-06-04 16:04:02,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:02,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:02,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:02,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:02,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:02,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:02,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 398 transitions, 6412 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:02,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:02,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:02,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:04,034 INFO L124 PetriNetUnfolderBase]: 3974/6746 cut-off events. [2024-06-04 16:04:04,035 INFO L125 PetriNetUnfolderBase]: For 608611/608613 co-relation queries the response was YES. [2024-06-04 16:04:04,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46632 conditions, 6746 events. 3974/6746 cut-off events. For 608611/608613 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 47391 event pairs, 1183 based on Foata normal form. 20/6763 useless extension candidates. Maximal degree in co-relation 46476. Up to 5966 conditions per place. [2024-06-04 16:04:04,120 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 338 selfloop transitions, 81 changer transitions 0/425 dead transitions. [2024-06-04 16:04:04,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 425 transitions, 7342 flow [2024-06-04 16:04:04,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:04,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:04:04,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-04 16:04:04,121 INFO L175 Difference]: Start difference. First operand has 347 places, 398 transitions, 6412 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:04:04,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 425 transitions, 7342 flow [2024-06-04 16:04:05,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 425 transitions, 6837 flow, removed 41 selfloop flow, removed 11 redundant places. [2024-06-04 16:04:05,846 INFO L231 Difference]: Finished difference. Result has 343 places, 398 transitions, 6082 flow [2024-06-04 16:04:05,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5907, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6082, PETRI_PLACES=343, PETRI_TRANSITIONS=398} [2024-06-04 16:04:05,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-04 16:04:05,847 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 398 transitions, 6082 flow [2024-06-04 16:04:05,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:05,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:05,847 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] [2024-06-04 16:04:05,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 16:04:05,847 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)] === [2024-06-04 16:04:05,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:05,847 INFO L85 PathProgramCache]: Analyzing trace with hash 871128288, now seen corresponding path program 13 times [2024-06-04 16:04:05,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:05,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246525854] [2024-06-04 16:04:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:05,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:06,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:06,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246525854] [2024-06-04 16:04:06,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246525854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:06,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:06,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:06,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866626688] [2024-06-04 16:04:06,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:06,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:06,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:06,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:06,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:06,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:06,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 398 transitions, 6082 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:06,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:06,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:06,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:07,278 INFO L124 PetriNetUnfolderBase]: 3928/6675 cut-off events. [2024-06-04 16:04:07,278 INFO L125 PetriNetUnfolderBase]: For 514333/514335 co-relation queries the response was YES. [2024-06-04 16:04:07,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43159 conditions, 6675 events. 3928/6675 cut-off events. For 514333/514335 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 46879 event pairs, 1160 based on Foata normal form. 20/6692 useless extension candidates. Maximal degree in co-relation 43002. Up to 5762 conditions per place. [2024-06-04 16:04:07,367 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 298 selfloop transitions, 121 changer transitions 0/425 dead transitions. [2024-06-04 16:04:07,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 425 transitions, 7012 flow [2024-06-04 16:04:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:07,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 16:04:07,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-04 16:04:07,368 INFO L175 Difference]: Start difference. First operand has 343 places, 398 transitions, 6082 flow. Second operand 7 states and 172 transitions. [2024-06-04 16:04:07,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 425 transitions, 7012 flow [2024-06-04 16:04:09,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 425 transitions, 6786 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:09,432 INFO L231 Difference]: Finished difference. Result has 343 places, 398 transitions, 6111 flow [2024-06-04 16:04:09,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5856, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6111, PETRI_PLACES=343, PETRI_TRANSITIONS=398} [2024-06-04 16:04:09,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-04 16:04:09,432 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 398 transitions, 6111 flow [2024-06-04 16:04:09,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:09,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:09,433 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] [2024-06-04 16:04:09,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 16:04:09,433 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)] === [2024-06-04 16:04:09,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:09,433 INFO L85 PathProgramCache]: Analyzing trace with hash -449921616, now seen corresponding path program 14 times [2024-06-04 16:04:09,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:09,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964635379] [2024-06-04 16:04:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:09,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:09,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:09,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964635379] [2024-06-04 16:04:09,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964635379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:09,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:09,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:09,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609294962] [2024-06-04 16:04:09,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:09,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:09,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:09,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:09,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:09,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:09,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 398 transitions, 6111 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:09,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:09,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:09,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:10,783 INFO L124 PetriNetUnfolderBase]: 3868/6584 cut-off events. [2024-06-04 16:04:10,783 INFO L125 PetriNetUnfolderBase]: For 412493/412495 co-relation queries the response was YES. [2024-06-04 16:04:10,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40124 conditions, 6584 events. 3868/6584 cut-off events. For 412493/412495 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 46049 event pairs, 983 based on Foata normal form. 20/6601 useless extension candidates. Maximal degree in co-relation 39967. Up to 3939 conditions per place. [2024-06-04 16:04:10,871 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 287 selfloop transitions, 136 changer transitions 2/431 dead transitions. [2024-06-04 16:04:10,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 431 transitions, 7103 flow [2024-06-04 16:04:10,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-04 16:04:10,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-04 16:04:10,872 INFO L175 Difference]: Start difference. First operand has 343 places, 398 transitions, 6111 flow. Second operand 7 states and 177 transitions. [2024-06-04 16:04:10,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 431 transitions, 7103 flow [2024-06-04 16:04:12,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 431 transitions, 6677 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:12,550 INFO L231 Difference]: Finished difference. Result has 343 places, 398 transitions, 5970 flow [2024-06-04 16:04:12,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5685, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5970, PETRI_PLACES=343, PETRI_TRANSITIONS=398} [2024-06-04 16:04:12,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-04 16:04:12,550 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 398 transitions, 5970 flow [2024-06-04 16:04:12,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:12,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:12,551 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] [2024-06-04 16:04:12,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 16:04:12,551 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)] === [2024-06-04 16:04:12,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:12,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1056718716, now seen corresponding path program 1 times [2024-06-04 16:04:12,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:12,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002859206] [2024-06-04 16:04:12,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:12,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:12,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:12,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002859206] [2024-06-04 16:04:12,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002859206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:12,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:12,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:12,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651680547] [2024-06-04 16:04:12,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:12,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:12,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:12,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:12,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:12,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:12,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 398 transitions, 5970 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:12,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:12,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:12,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:13,840 INFO L124 PetriNetUnfolderBase]: 3856/6558 cut-off events. [2024-06-04 16:04:13,841 INFO L125 PetriNetUnfolderBase]: For 318012/318014 co-relation queries the response was YES. [2024-06-04 16:04:13,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39183 conditions, 6558 events. 3856/6558 cut-off events. For 318012/318014 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 45958 event pairs, 1133 based on Foata normal form. 2/6557 useless extension candidates. Maximal degree in co-relation 39027. Up to 5900 conditions per place. [2024-06-04 16:04:13,913 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 344 selfloop transitions, 65 changer transitions 0/415 dead transitions. [2024-06-04 16:04:13,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 415 transitions, 6830 flow [2024-06-04 16:04:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 16:04:13,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-04 16:04:13,914 INFO L175 Difference]: Start difference. First operand has 343 places, 398 transitions, 5970 flow. Second operand 6 states and 142 transitions. [2024-06-04 16:04:13,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 415 transitions, 6830 flow [2024-06-04 16:04:15,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 415 transitions, 6422 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-04 16:04:15,599 INFO L231 Difference]: Finished difference. Result has 340 places, 398 transitions, 5698 flow [2024-06-04 16:04:15,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5562, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5698, PETRI_PLACES=340, PETRI_TRANSITIONS=398} [2024-06-04 16:04:15,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-04 16:04:15,600 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 398 transitions, 5698 flow [2024-06-04 16:04:15,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:15,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:15,600 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] [2024-06-04 16:04:15,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 16:04:15,600 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)] === [2024-06-04 16:04:15,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:15,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1057193946, now seen corresponding path program 2 times [2024-06-04 16:04:15,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:15,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807199832] [2024-06-04 16:04:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:15,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:15,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:15,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:15,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807199832] [2024-06-04 16:04:15,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807199832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:15,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:15,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:15,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355125145] [2024-06-04 16:04:15,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:15,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:15,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:15,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:15,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:15,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:15,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 398 transitions, 5698 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:15,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:15,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:15,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:16,852 INFO L124 PetriNetUnfolderBase]: 3897/6598 cut-off events. [2024-06-04 16:04:16,852 INFO L125 PetriNetUnfolderBase]: For 342253/342255 co-relation queries the response was YES. [2024-06-04 16:04:16,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39224 conditions, 6598 events. 3897/6598 cut-off events. For 342253/342255 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 46105 event pairs, 1119 based on Foata normal form. 2/6592 useless extension candidates. Maximal degree in co-relation 39068. Up to 5792 conditions per place. [2024-06-04 16:04:16,932 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 347 selfloop transitions, 70 changer transitions 0/423 dead transitions. [2024-06-04 16:04:16,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 423 transitions, 6867 flow [2024-06-04 16:04:16,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:04:16,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:04:16,933 INFO L175 Difference]: Start difference. First operand has 340 places, 398 transitions, 5698 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:04:16,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 423 transitions, 6867 flow [2024-06-04 16:04:18,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 423 transitions, 6667 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:18,530 INFO L231 Difference]: Finished difference. Result has 341 places, 401 transitions, 5735 flow [2024-06-04 16:04:18,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5498, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5735, PETRI_PLACES=341, PETRI_TRANSITIONS=401} [2024-06-04 16:04:18,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-04 16:04:18,530 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 401 transitions, 5735 flow [2024-06-04 16:04:18,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:18,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:18,530 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] [2024-06-04 16:04:18,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 16:04:18,530 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)] === [2024-06-04 16:04:18,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:18,531 INFO L85 PathProgramCache]: Analyzing trace with hash -698118938, now seen corresponding path program 3 times [2024-06-04 16:04:18,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:18,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312040929] [2024-06-04 16:04:18,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:18,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:18,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:18,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312040929] [2024-06-04 16:04:18,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312040929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:18,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:18,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:18,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012392265] [2024-06-04 16:04:18,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:18,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:18,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:18,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:18,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:18,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:18,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 401 transitions, 5735 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:18,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:18,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:18,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:19,750 INFO L124 PetriNetUnfolderBase]: 3892/6627 cut-off events. [2024-06-04 16:04:19,750 INFO L125 PetriNetUnfolderBase]: For 349166/349170 co-relation queries the response was YES. [2024-06-04 16:04:19,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38843 conditions, 6627 events. 3892/6627 cut-off events. For 349166/349170 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 46336 event pairs, 988 based on Foata normal form. 10/6635 useless extension candidates. Maximal degree in co-relation 38685. Up to 5111 conditions per place. [2024-06-04 16:04:19,829 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 354 selfloop transitions, 68 changer transitions 0/428 dead transitions. [2024-06-04 16:04:19,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 428 transitions, 7129 flow [2024-06-04 16:04:19,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:19,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:04:19,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-04 16:04:19,830 INFO L175 Difference]: Start difference. First operand has 341 places, 401 transitions, 5735 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:04:19,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 428 transitions, 7129 flow [2024-06-04 16:04:21,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 428 transitions, 6979 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-04 16:04:21,687 INFO L231 Difference]: Finished difference. Result has 344 places, 403 transitions, 5779 flow [2024-06-04 16:04:21,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5585, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5779, PETRI_PLACES=344, PETRI_TRANSITIONS=403} [2024-06-04 16:04:21,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-04 16:04:21,687 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 403 transitions, 5779 flow [2024-06-04 16:04:21,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:21,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:21,688 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] [2024-06-04 16:04:21,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 16:04:21,688 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)] === [2024-06-04 16:04:21,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:21,688 INFO L85 PathProgramCache]: Analyzing trace with hash 25830660, now seen corresponding path program 4 times [2024-06-04 16:04:21,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:21,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555970591] [2024-06-04 16:04:21,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:21,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:21,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:21,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:21,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:21,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555970591] [2024-06-04 16:04:21,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555970591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:21,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:21,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:21,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598770192] [2024-06-04 16:04:21,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:21,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:21,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:21,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:21,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:21,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:21,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 403 transitions, 5779 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:21,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:21,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:21,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:22,944 INFO L124 PetriNetUnfolderBase]: 3880/6605 cut-off events. [2024-06-04 16:04:22,945 INFO L125 PetriNetUnfolderBase]: For 316458/316462 co-relation queries the response was YES. [2024-06-04 16:04:23,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38714 conditions, 6605 events. 3880/6605 cut-off events. For 316458/316462 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 46214 event pairs, 966 based on Foata normal form. 4/6607 useless extension candidates. Maximal degree in co-relation 38555. Up to 5103 conditions per place. [2024-06-04 16:04:23,029 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 350 selfloop transitions, 74 changer transitions 0/430 dead transitions. [2024-06-04 16:04:23,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 430 transitions, 7137 flow [2024-06-04 16:04:23,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:23,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-04 16:04:23,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-04 16:04:23,030 INFO L175 Difference]: Start difference. First operand has 344 places, 403 transitions, 5779 flow. Second operand 6 states and 149 transitions. [2024-06-04 16:04:23,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 430 transitions, 7137 flow [2024-06-04 16:04:25,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 430 transitions, 6953 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-04 16:04:25,055 INFO L231 Difference]: Finished difference. Result has 347 places, 403 transitions, 5748 flow [2024-06-04 16:04:25,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5595, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5748, PETRI_PLACES=347, PETRI_TRANSITIONS=403} [2024-06-04 16:04:25,055 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-04 16:04:25,055 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 403 transitions, 5748 flow [2024-06-04 16:04:25,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:25,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:25,055 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] [2024-06-04 16:04:25,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 16:04:25,055 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)] === [2024-06-04 16:04:25,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:25,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1863165372, now seen corresponding path program 1 times [2024-06-04 16:04:25,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:25,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286718084] [2024-06-04 16:04:25,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:25,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:25,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:25,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:25,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286718084] [2024-06-04 16:04:25,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286718084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:25,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:25,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:25,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79260817] [2024-06-04 16:04:25,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:25,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:25,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:25,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:25,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:25,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:25,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 403 transitions, 5748 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:25,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:25,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:25,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:26,387 INFO L124 PetriNetUnfolderBase]: 4047/6830 cut-off events. [2024-06-04 16:04:26,387 INFO L125 PetriNetUnfolderBase]: For 420393/420393 co-relation queries the response was YES. [2024-06-04 16:04:26,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42069 conditions, 6830 events. 4047/6830 cut-off events. For 420393/420393 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 47500 event pairs, 911 based on Foata normal form. 6/6796 useless extension candidates. Maximal degree in co-relation 41909. Up to 4867 conditions per place. [2024-06-04 16:04:26,477 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 367 selfloop transitions, 90 changer transitions 0/463 dead transitions. [2024-06-04 16:04:26,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 463 transitions, 7531 flow [2024-06-04 16:04:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-04 16:04:26,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-04 16:04:26,478 INFO L175 Difference]: Start difference. First operand has 347 places, 403 transitions, 5748 flow. Second operand 9 states and 211 transitions. [2024-06-04 16:04:26,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 463 transitions, 7531 flow [2024-06-04 16:04:28,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 463 transitions, 7336 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:28,535 INFO L231 Difference]: Finished difference. Result has 352 places, 413 transitions, 5994 flow [2024-06-04 16:04:28,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5560, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5994, PETRI_PLACES=352, PETRI_TRANSITIONS=413} [2024-06-04 16:04:28,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-04 16:04:28,536 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 413 transitions, 5994 flow [2024-06-04 16:04:28,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:28,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:28,536 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] [2024-06-04 16:04:28,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 16:04:28,536 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)] === [2024-06-04 16:04:28,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:28,536 INFO L85 PathProgramCache]: Analyzing trace with hash 216116056, now seen corresponding path program 2 times [2024-06-04 16:04:28,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:28,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90184153] [2024-06-04 16:04:28,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:28,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:28,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:28,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:28,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90184153] [2024-06-04 16:04:28,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90184153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:28,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:28,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:28,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426024919] [2024-06-04 16:04:28,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:28,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:28,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:28,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:28,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:28,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:28,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 413 transitions, 5994 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:28,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:28,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:28,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:29,905 INFO L124 PetriNetUnfolderBase]: 4075/6906 cut-off events. [2024-06-04 16:04:29,905 INFO L125 PetriNetUnfolderBase]: For 429813/429815 co-relation queries the response was YES. [2024-06-04 16:04:29,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42575 conditions, 6906 events. 4075/6906 cut-off events. For 429813/429815 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 48436 event pairs, 1024 based on Foata normal form. 8/6906 useless extension candidates. Maximal degree in co-relation 42413. Up to 5822 conditions per place. [2024-06-04 16:04:29,992 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 364 selfloop transitions, 82 changer transitions 0/452 dead transitions. [2024-06-04 16:04:29,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 452 transitions, 7096 flow [2024-06-04 16:04:29,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:04:29,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-04 16:04:29,993 INFO L175 Difference]: Start difference. First operand has 352 places, 413 transitions, 5994 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:04:29,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 452 transitions, 7096 flow [2024-06-04 16:04:32,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 452 transitions, 6913 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-04 16:04:32,433 INFO L231 Difference]: Finished difference. Result has 357 places, 416 transitions, 6045 flow [2024-06-04 16:04:32,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5835, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6045, PETRI_PLACES=357, PETRI_TRANSITIONS=416} [2024-06-04 16:04:32,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-04 16:04:32,433 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 416 transitions, 6045 flow [2024-06-04 16:04:32,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:32,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:32,434 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] [2024-06-04 16:04:32,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 16:04:32,434 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)] === [2024-06-04 16:04:32,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:32,434 INFO L85 PathProgramCache]: Analyzing trace with hash 216116242, now seen corresponding path program 1 times [2024-06-04 16:04:32,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:32,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965884210] [2024-06-04 16:04:32,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:32,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:32,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:32,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:32,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965884210] [2024-06-04 16:04:32,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965884210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:32,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:32,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:32,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134717345] [2024-06-04 16:04:32,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:32,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:32,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:32,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:32,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:32,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:32,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 416 transitions, 6045 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:32,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:32,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:32,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:33,752 INFO L124 PetriNetUnfolderBase]: 4095/6950 cut-off events. [2024-06-04 16:04:33,752 INFO L125 PetriNetUnfolderBase]: For 433756/433760 co-relation queries the response was YES. [2024-06-04 16:04:33,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42513 conditions, 6950 events. 4095/6950 cut-off events. For 433756/433760 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 48853 event pairs, 996 based on Foata normal form. 8/6956 useless extension candidates. Maximal degree in co-relation 42349. Up to 5372 conditions per place. [2024-06-04 16:04:33,842 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 363 selfloop transitions, 79 changer transitions 0/448 dead transitions. [2024-06-04 16:04:33,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 448 transitions, 7489 flow [2024-06-04 16:04:33,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:33,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:04:33,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-04 16:04:33,844 INFO L175 Difference]: Start difference. First operand has 357 places, 416 transitions, 6045 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:04:33,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 448 transitions, 7489 flow [2024-06-04 16:04:35,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 448 transitions, 7317 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 16:04:35,821 INFO L231 Difference]: Finished difference. Result has 359 places, 417 transitions, 6053 flow [2024-06-04 16:04:35,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5873, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6053, PETRI_PLACES=359, PETRI_TRANSITIONS=417} [2024-06-04 16:04:35,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-04 16:04:35,822 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 417 transitions, 6053 flow [2024-06-04 16:04:35,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:35,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:35,822 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] [2024-06-04 16:04:35,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 16:04:35,822 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)] === [2024-06-04 16:04:35,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:35,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1869701860, now seen corresponding path program 2 times [2024-06-04 16:04:35,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:35,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529770927] [2024-06-04 16:04:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:35,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:36,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:36,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529770927] [2024-06-04 16:04:36,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529770927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:36,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:36,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:36,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240597211] [2024-06-04 16:04:36,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:36,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:36,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:36,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:36,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:36,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:36,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 417 transitions, 6053 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:36,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:36,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:36,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:37,274 INFO L124 PetriNetUnfolderBase]: 4115/6982 cut-off events. [2024-06-04 16:04:37,274 INFO L125 PetriNetUnfolderBase]: For 441728/441732 co-relation queries the response was YES. [2024-06-04 16:04:37,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42843 conditions, 6982 events. 4115/6982 cut-off events. For 441728/441732 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 49022 event pairs, 994 based on Foata normal form. 8/6988 useless extension candidates. Maximal degree in co-relation 42678. Up to 5384 conditions per place. [2024-06-04 16:04:37,358 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 360 selfloop transitions, 81 changer transitions 0/447 dead transitions. [2024-06-04 16:04:37,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 447 transitions, 7497 flow [2024-06-04 16:04:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:37,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-04 16:04:37,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-04 16:04:37,358 INFO L175 Difference]: Start difference. First operand has 359 places, 417 transitions, 6053 flow. Second operand 6 states and 150 transitions. [2024-06-04 16:04:37,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 447 transitions, 7497 flow [2024-06-04 16:04:39,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 447 transitions, 7349 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 16:04:39,266 INFO L231 Difference]: Finished difference. Result has 361 places, 418 transitions, 6094 flow [2024-06-04 16:04:39,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5906, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6094, PETRI_PLACES=361, PETRI_TRANSITIONS=418} [2024-06-04 16:04:39,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-04 16:04:39,267 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 418 transitions, 6094 flow [2024-06-04 16:04:39,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:39,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:39,267 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] [2024-06-04 16:04:39,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 16:04:39,267 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)] === [2024-06-04 16:04:39,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:39,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1685676546, now seen corresponding path program 3 times [2024-06-04 16:04:39,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:39,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928131649] [2024-06-04 16:04:39,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:39,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:39,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:39,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928131649] [2024-06-04 16:04:39,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928131649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:39,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:39,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:39,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057557474] [2024-06-04 16:04:39,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:39,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:39,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:39,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:39,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:39,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:39,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 418 transitions, 6094 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:39,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:39,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:39,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:40,644 INFO L124 PetriNetUnfolderBase]: 4102/6963 cut-off events. [2024-06-04 16:04:40,644 INFO L125 PetriNetUnfolderBase]: For 415912/415916 co-relation queries the response was YES. [2024-06-04 16:04:40,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42228 conditions, 6963 events. 4102/6963 cut-off events. For 415912/415916 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 48932 event pairs, 1024 based on Foata normal form. 8/6969 useless extension candidates. Maximal degree in co-relation 42062. Up to 5378 conditions per place. [2024-06-04 16:04:40,745 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 363 selfloop transitions, 73 changer transitions 0/442 dead transitions. [2024-06-04 16:04:40,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 442 transitions, 7278 flow [2024-06-04 16:04:40,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:40,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:40,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 16:04:40,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-04 16:04:40,745 INFO L175 Difference]: Start difference. First operand has 361 places, 418 transitions, 6094 flow. Second operand 6 states and 142 transitions. [2024-06-04 16:04:40,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 442 transitions, 7278 flow [2024-06-04 16:04:43,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 442 transitions, 7119 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-04 16:04:43,019 INFO L231 Difference]: Finished difference. Result has 363 places, 418 transitions, 6087 flow [2024-06-04 16:04:43,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5937, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6087, PETRI_PLACES=363, PETRI_TRANSITIONS=418} [2024-06-04 16:04:43,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-04 16:04:43,019 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 418 transitions, 6087 flow [2024-06-04 16:04:43,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:43,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:43,020 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] [2024-06-04 16:04:43,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 16:04:43,020 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)] === [2024-06-04 16:04:43,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:43,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1685913882, now seen corresponding path program 3 times [2024-06-04 16:04:43,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:43,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389506135] [2024-06-04 16:04:43,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:43,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:43,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:43,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389506135] [2024-06-04 16:04:43,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389506135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:43,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:43,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:43,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478433522] [2024-06-04 16:04:43,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:43,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:43,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:43,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:43,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:43,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:43,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 418 transitions, 6087 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:43,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:43,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:43,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:44,563 INFO L124 PetriNetUnfolderBase]: 4410/7505 cut-off events. [2024-06-04 16:04:44,563 INFO L125 PetriNetUnfolderBase]: For 824385/824387 co-relation queries the response was YES. [2024-06-04 16:04:44,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49270 conditions, 7505 events. 4410/7505 cut-off events. For 824385/824387 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 53596 event pairs, 1046 based on Foata normal form. 44/7541 useless extension candidates. Maximal degree in co-relation 49104. Up to 5573 conditions per place. [2024-06-04 16:04:44,662 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 88 changer transitions 6/474 dead transitions. [2024-06-04 16:04:44,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 474 transitions, 7686 flow [2024-06-04 16:04:44,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:44,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-04 16:04:44,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-04 16:04:44,663 INFO L175 Difference]: Start difference. First operand has 363 places, 418 transitions, 6087 flow. Second operand 8 states and 210 transitions. [2024-06-04 16:04:44,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 474 transitions, 7686 flow [2024-06-04 16:04:46,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 474 transitions, 7403 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:46,960 INFO L231 Difference]: Finished difference. Result has 365 places, 420 transitions, 6152 flow [2024-06-04 16:04:46,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5804, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6152, PETRI_PLACES=365, PETRI_TRANSITIONS=420} [2024-06-04 16:04:46,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-04 16:04:46,961 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 420 transitions, 6152 flow [2024-06-04 16:04:46,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:46,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:46,961 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] [2024-06-04 16:04:46,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 16:04:46,961 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)] === [2024-06-04 16:04:46,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:46,962 INFO L85 PathProgramCache]: Analyzing trace with hash -571654474, now seen corresponding path program 4 times [2024-06-04 16:04:46,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:46,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218043123] [2024-06-04 16:04:46,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:46,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:47,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:47,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:47,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218043123] [2024-06-04 16:04:47,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218043123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:47,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:47,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:47,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717131766] [2024-06-04 16:04:47,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:47,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:47,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:47,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:47,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:47,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:47,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 420 transitions, 6152 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:47,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:47,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:47,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:48,636 INFO L124 PetriNetUnfolderBase]: 4619/7829 cut-off events. [2024-06-04 16:04:48,637 INFO L125 PetriNetUnfolderBase]: For 884385/884385 co-relation queries the response was YES. [2024-06-04 16:04:48,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55900 conditions, 7829 events. 4619/7829 cut-off events. For 884385/884385 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 56479 event pairs, 1280 based on Foata normal form. 6/7799 useless extension candidates. Maximal degree in co-relation 55733. Up to 5908 conditions per place. [2024-06-04 16:04:48,730 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 250 selfloop transitions, 214 changer transitions 0/470 dead transitions. [2024-06-04 16:04:48,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 470 transitions, 7644 flow [2024-06-04 16:04:48,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:04:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:04:48,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-04 16:04:48,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5742793791574279 [2024-06-04 16:04:48,731 INFO L175 Difference]: Start difference. First operand has 365 places, 420 transitions, 6152 flow. Second operand 11 states and 259 transitions. [2024-06-04 16:04:48,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 470 transitions, 7644 flow [2024-06-04 16:04:51,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 470 transitions, 7389 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-04 16:04:51,669 INFO L231 Difference]: Finished difference. Result has 372 places, 424 transitions, 6503 flow [2024-06-04 16:04:51,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5929, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6503, PETRI_PLACES=372, PETRI_TRANSITIONS=424} [2024-06-04 16:04:51,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-04 16:04:51,669 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 424 transitions, 6503 flow [2024-06-04 16:04:51,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:51,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:51,669 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] [2024-06-04 16:04:51,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 16:04:51,670 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)] === [2024-06-04 16:04:51,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:51,670 INFO L85 PathProgramCache]: Analyzing trace with hash 2016982006, now seen corresponding path program 5 times [2024-06-04 16:04:51,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:51,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123653836] [2024-06-04 16:04:51,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:51,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:51,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:51,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:51,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123653836] [2024-06-04 16:04:51,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123653836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:51,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:51,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:04:51,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425596406] [2024-06-04 16:04:51,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:51,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:04:51,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:51,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:04:51,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:04:51,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:51,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 424 transitions, 6503 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:51,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:51,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:51,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:53,361 INFO L124 PetriNetUnfolderBase]: 4534/7741 cut-off events. [2024-06-04 16:04:53,361 INFO L125 PetriNetUnfolderBase]: For 827323/827325 co-relation queries the response was YES. [2024-06-04 16:04:53,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50567 conditions, 7741 events. 4534/7741 cut-off events. For 827323/827325 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 56049 event pairs, 1361 based on Foata normal form. 44/7775 useless extension candidates. Maximal degree in co-relation 50398. Up to 6651 conditions per place. [2024-06-04 16:04:53,466 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 377 selfloop transitions, 73 changer transitions 4/460 dead transitions. [2024-06-04 16:04:53,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 460 transitions, 7559 flow [2024-06-04 16:04:53,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:53,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:53,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 16:04:53,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-04 16:04:53,467 INFO L175 Difference]: Start difference. First operand has 372 places, 424 transitions, 6503 flow. Second operand 7 states and 180 transitions. [2024-06-04 16:04:53,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 460 transitions, 7559 flow [2024-06-04 16:04:55,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 460 transitions, 7051 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:55,746 INFO L231 Difference]: Finished difference. Result has 371 places, 424 transitions, 6149 flow [2024-06-04 16:04:55,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5995, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6149, PETRI_PLACES=371, PETRI_TRANSITIONS=424} [2024-06-04 16:04:55,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-04 16:04:55,747 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 424 transitions, 6149 flow [2024-06-04 16:04:55,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:55,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:55,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:55,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 16:04:55,747 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)] === [2024-06-04 16:04:55,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:55,747 INFO L85 PathProgramCache]: Analyzing trace with hash -462576266, now seen corresponding path program 4 times [2024-06-04 16:04:55,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:55,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313662161] [2024-06-04 16:04:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:55,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:55,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:55,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313662161] [2024-06-04 16:04:55,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313662161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:55,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:55,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:55,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900303289] [2024-06-04 16:04:55,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:55,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:55,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:55,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:55,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:55,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:04:55,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 424 transitions, 6149 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:55,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:55,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:04:55,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:57,215 INFO L124 PetriNetUnfolderBase]: 4521/7672 cut-off events. [2024-06-04 16:04:57,215 INFO L125 PetriNetUnfolderBase]: For 600410/600412 co-relation queries the response was YES. [2024-06-04 16:04:57,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48970 conditions, 7672 events. 4521/7672 cut-off events. For 600410/600412 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 55165 event pairs, 1403 based on Foata normal form. 6/7664 useless extension candidates. Maximal degree in co-relation 48800. Up to 6805 conditions per place. [2024-06-04 16:04:57,319 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 369 selfloop transitions, 70 changer transitions 2/447 dead transitions. [2024-06-04 16:04:57,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 447 transitions, 7121 flow [2024-06-04 16:04:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:57,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:57,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-04 16:04:57,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-04 16:04:57,320 INFO L175 Difference]: Start difference. First operand has 371 places, 424 transitions, 6149 flow. Second operand 6 states and 147 transitions. [2024-06-04 16:04:57,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 447 transitions, 7121 flow [2024-06-04 16:05:00,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 447 transitions, 6963 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:00,108 INFO L231 Difference]: Finished difference. Result has 370 places, 424 transitions, 6136 flow [2024-06-04 16:05:00,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5991, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6136, PETRI_PLACES=370, PETRI_TRANSITIONS=424} [2024-06-04 16:05:00,108 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-04 16:05:00,108 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 424 transitions, 6136 flow [2024-06-04 16:05:00,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:00,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:00,109 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] [2024-06-04 16:05:00,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 16:05:00,109 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)] === [2024-06-04 16:05:00,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:00,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1132923666, now seen corresponding path program 6 times [2024-06-04 16:05:00,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:00,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077309359] [2024-06-04 16:05:00,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:00,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:00,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:00,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:00,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077309359] [2024-06-04 16:05:00,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077309359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:00,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:00,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:00,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812082857] [2024-06-04 16:05:00,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:00,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:00,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:00,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:00,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:00,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 424 transitions, 6136 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:00,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:00,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:00,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:01,736 INFO L124 PetriNetUnfolderBase]: 4651/7933 cut-off events. [2024-06-04 16:05:01,736 INFO L125 PetriNetUnfolderBase]: For 679649/679649 co-relation queries the response was YES. [2024-06-04 16:05:01,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52028 conditions, 7933 events. 4651/7933 cut-off events. For 679649/679649 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 57368 event pairs, 1346 based on Foata normal form. 6/7934 useless extension candidates. Maximal degree in co-relation 51858. Up to 6642 conditions per place. [2024-06-04 16:05:01,841 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 414 selfloop transitions, 60 changer transitions 0/480 dead transitions. [2024-06-04 16:05:01,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 480 transitions, 7914 flow [2024-06-04 16:05:01,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:05:01,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:05:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:05:01,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-04 16:05:01,842 INFO L175 Difference]: Start difference. First operand has 370 places, 424 transitions, 6136 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:05:01,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 480 transitions, 7914 flow [2024-06-04 16:05:04,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 480 transitions, 7736 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:05:04,504 INFO L231 Difference]: Finished difference. Result has 376 places, 436 transitions, 6377 flow [2024-06-04 16:05:04,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5965, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6377, PETRI_PLACES=376, PETRI_TRANSITIONS=436} [2024-06-04 16:05:04,504 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-04 16:05:04,504 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 436 transitions, 6377 flow [2024-06-04 16:05:04,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:04,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:04,504 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] [2024-06-04 16:05:04,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 16:05:04,504 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)] === [2024-06-04 16:05:04,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:04,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1489050194, now seen corresponding path program 7 times [2024-06-04 16:05:04,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:04,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144140433] [2024-06-04 16:05:04,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:04,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:04,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:04,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:04,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144140433] [2024-06-04 16:05:04,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144140433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:04,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:04,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:04,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8247511] [2024-06-04 16:05:04,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:04,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:04,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:04,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:04,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:04,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:04,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 436 transitions, 6377 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:04,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:04,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:04,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:06,311 INFO L124 PetriNetUnfolderBase]: 4647/7948 cut-off events. [2024-06-04 16:05:06,312 INFO L125 PetriNetUnfolderBase]: For 752259/752261 co-relation queries the response was YES. [2024-06-04 16:05:06,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49525 conditions, 7948 events. 4647/7948 cut-off events. For 752259/752261 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 57694 event pairs, 1296 based on Foata normal form. 44/7984 useless extension candidates. Maximal degree in co-relation 49351. Up to 6748 conditions per place. [2024-06-04 16:05:06,404 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 379 selfloop transitions, 83 changer transitions 7/475 dead transitions. [2024-06-04 16:05:06,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 475 transitions, 7471 flow [2024-06-04 16:05:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:05:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:05:06,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 16:05:06,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-04 16:05:06,405 INFO L175 Difference]: Start difference. First operand has 376 places, 436 transitions, 6377 flow. Second operand 7 states and 182 transitions. [2024-06-04 16:05:06,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 475 transitions, 7471 flow [2024-06-04 16:05:09,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 475 transitions, 7379 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 16:05:09,050 INFO L231 Difference]: Finished difference. Result has 380 places, 435 transitions, 6442 flow [2024-06-04 16:05:09,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6285, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6442, PETRI_PLACES=380, PETRI_TRANSITIONS=435} [2024-06-04 16:05:09,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 338 predicate places. [2024-06-04 16:05:09,051 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 435 transitions, 6442 flow [2024-06-04 16:05:09,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:09,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:09,051 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] [2024-06-04 16:05:09,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 16:05:09,051 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)] === [2024-06-04 16:05:09,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:09,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1764142734, now seen corresponding path program 8 times [2024-06-04 16:05:09,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:09,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532265518] [2024-06-04 16:05:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:09,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:09,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:09,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:09,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532265518] [2024-06-04 16:05:09,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532265518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:09,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:09,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:09,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448100134] [2024-06-04 16:05:09,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:09,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:09,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:09,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:09,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:09,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:09,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 435 transitions, 6442 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:09,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:09,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:09,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:10,803 INFO L124 PetriNetUnfolderBase]: 4872/8299 cut-off events. [2024-06-04 16:05:10,803 INFO L125 PetriNetUnfolderBase]: For 867638/867638 co-relation queries the response was YES. [2024-06-04 16:05:10,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57554 conditions, 8299 events. 4872/8299 cut-off events. For 867638/867638 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 60550 event pairs, 1607 based on Foata normal form. 8/8303 useless extension candidates. Maximal degree in co-relation 57378. Up to 6683 conditions per place. [2024-06-04 16:05:10,919 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 258 selfloop transitions, 220 changer transitions 0/484 dead transitions. [2024-06-04 16:05:10,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 484 transitions, 7911 flow [2024-06-04 16:05:10,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:05:10,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:05:10,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 273 transitions. [2024-06-04 16:05:10,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-04 16:05:10,920 INFO L175 Difference]: Start difference. First operand has 380 places, 435 transitions, 6442 flow. Second operand 12 states and 273 transitions. [2024-06-04 16:05:10,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 484 transitions, 7911 flow [2024-06-04 16:05:14,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 484 transitions, 7705 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:14,927 INFO L231 Difference]: Finished difference. Result has 386 places, 439 transitions, 6830 flow [2024-06-04 16:05:14,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6238, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6830, PETRI_PLACES=386, PETRI_TRANSITIONS=439} [2024-06-04 16:05:14,928 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-04 16:05:14,928 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 439 transitions, 6830 flow [2024-06-04 16:05:14,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:14,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:14,928 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] [2024-06-04 16:05:14,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 16:05:14,928 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)] === [2024-06-04 16:05:14,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1606690822, now seen corresponding path program 9 times [2024-06-04 16:05:14,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:14,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680514519] [2024-06-04 16:05:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:14,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:15,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:15,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:15,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680514519] [2024-06-04 16:05:15,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680514519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:15,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:15,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:15,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852682526] [2024-06-04 16:05:15,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:15,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:15,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:15,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:15,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:15,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:15,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 439 transitions, 6830 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:15,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:15,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:15,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:16,644 INFO L124 PetriNetUnfolderBase]: 4900/8345 cut-off events. [2024-06-04 16:05:16,644 INFO L125 PetriNetUnfolderBase]: For 871166/871166 co-relation queries the response was YES. [2024-06-04 16:05:16,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58256 conditions, 8345 events. 4900/8345 cut-off events. For 871166/871166 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 60952 event pairs, 1631 based on Foata normal form. 8/8351 useless extension candidates. Maximal degree in co-relation 58079. Up to 7196 conditions per place. [2024-06-04 16:05:16,765 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 253 selfloop transitions, 216 changer transitions 0/475 dead transitions. [2024-06-04 16:05:16,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 475 transitions, 7907 flow [2024-06-04 16:05:16,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:05:16,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:05:16,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-04 16:05:16,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-04 16:05:16,765 INFO L175 Difference]: Start difference. First operand has 386 places, 439 transitions, 6830 flow. Second operand 12 states and 264 transitions. [2024-06-04 16:05:16,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 475 transitions, 7907 flow [2024-06-04 16:05:20,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 475 transitions, 7547 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-04 16:05:20,407 INFO L231 Difference]: Finished difference. Result has 390 places, 440 transitions, 6938 flow [2024-06-04 16:05:20,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6472, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6938, PETRI_PLACES=390, PETRI_TRANSITIONS=440} [2024-06-04 16:05:20,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-04 16:05:20,407 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 440 transitions, 6938 flow [2024-06-04 16:05:20,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:20,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:20,408 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] [2024-06-04 16:05:20,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 16:05:20,408 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)] === [2024-06-04 16:05:20,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1805654118, now seen corresponding path program 10 times [2024-06-04 16:05:20,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:20,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215177359] [2024-06-04 16:05:20,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:20,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:20,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:20,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:20,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215177359] [2024-06-04 16:05:20,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215177359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:20,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:20,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:20,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445733099] [2024-06-04 16:05:20,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:20,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:20,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:20,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:20,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:20,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:20,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 440 transitions, 6938 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:20,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:20,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:20,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:22,383 INFO L124 PetriNetUnfolderBase]: 5193/8804 cut-off events. [2024-06-04 16:05:22,383 INFO L125 PetriNetUnfolderBase]: For 1189658/1189658 co-relation queries the response was YES. [2024-06-04 16:05:22,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66871 conditions, 8804 events. 5193/8804 cut-off events. For 1189658/1189658 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 64721 event pairs, 1742 based on Foata normal form. 8/8810 useless extension candidates. Maximal degree in co-relation 66692. Up to 7186 conditions per place. [2024-06-04 16:05:22,515 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 268 selfloop transitions, 212 changer transitions 0/486 dead transitions. [2024-06-04 16:05:22,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 486 transitions, 8413 flow [2024-06-04 16:05:22,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:05:22,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:05:22,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 268 transitions. [2024-06-04 16:05:22,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-04 16:05:22,516 INFO L175 Difference]: Start difference. First operand has 390 places, 440 transitions, 6938 flow. Second operand 12 states and 268 transitions. [2024-06-04 16:05:22,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 486 transitions, 8413 flow [2024-06-04 16:05:26,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 486 transitions, 7972 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-04 16:05:26,467 INFO L231 Difference]: Finished difference. Result has 393 places, 444 transitions, 7081 flow [2024-06-04 16:05:26,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6497, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7081, PETRI_PLACES=393, PETRI_TRANSITIONS=444} [2024-06-04 16:05:26,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-04 16:05:26,467 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 444 transitions, 7081 flow [2024-06-04 16:05:26,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:26,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:26,467 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] [2024-06-04 16:05:26,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 16:05:26,468 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)] === [2024-06-04 16:05:26,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:26,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1640280684, now seen corresponding path program 11 times [2024-06-04 16:05:26,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:26,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233847187] [2024-06-04 16:05:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:26,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:26,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:26,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:26,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233847187] [2024-06-04 16:05:26,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233847187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:26,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:26,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:26,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982492401] [2024-06-04 16:05:26,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:26,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:26,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:26,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:26,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:26,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:26,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 444 transitions, 7081 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:26,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:26,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:26,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:28,648 INFO L124 PetriNetUnfolderBase]: 5088/8643 cut-off events. [2024-06-04 16:05:28,648 INFO L125 PetriNetUnfolderBase]: For 1161972/1161974 co-relation queries the response was YES. [2024-06-04 16:05:28,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60842 conditions, 8643 events. 5088/8643 cut-off events. For 1161972/1161974 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 63557 event pairs, 1693 based on Foata normal form. 52/8687 useless extension candidates. Maximal degree in co-relation 60661. Up to 7537 conditions per place. [2024-06-04 16:05:28,763 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 385 selfloop transitions, 85 changer transitions 3/479 dead transitions. [2024-06-04 16:05:28,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 479 transitions, 8151 flow [2024-06-04 16:05:28,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:05:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:05:28,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-04 16:05:28,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-04 16:05:28,764 INFO L175 Difference]: Start difference. First operand has 393 places, 444 transitions, 7081 flow. Second operand 7 states and 178 transitions. [2024-06-04 16:05:28,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 479 transitions, 8151 flow [2024-06-04 16:05:31,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 479 transitions, 7789 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:31,938 INFO L231 Difference]: Finished difference. Result has 393 places, 443 transitions, 6889 flow [2024-06-04 16:05:31,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6719, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6889, PETRI_PLACES=393, PETRI_TRANSITIONS=443} [2024-06-04 16:05:31,938 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-04 16:05:31,938 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 443 transitions, 6889 flow [2024-06-04 16:05:31,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:31,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:31,939 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] [2024-06-04 16:05:31,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 16:05:31,939 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)] === [2024-06-04 16:05:31,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:31,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1520026938, now seen corresponding path program 12 times [2024-06-04 16:05:31,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:31,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631335155] [2024-06-04 16:05:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:31,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:32,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:32,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:32,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631335155] [2024-06-04 16:05:32,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631335155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:32,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:32,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:32,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135024732] [2024-06-04 16:05:32,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:32,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:32,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:32,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:32,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:32,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:32,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 443 transitions, 6889 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:32,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:32,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:32,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:34,058 INFO L124 PetriNetUnfolderBase]: 5060/8609 cut-off events. [2024-06-04 16:05:34,059 INFO L125 PetriNetUnfolderBase]: For 863237/863237 co-relation queries the response was YES. [2024-06-04 16:05:34,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59117 conditions, 8609 events. 5060/8609 cut-off events. For 863237/863237 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 63288 event pairs, 1685 based on Foata normal form. 8/8615 useless extension candidates. Maximal degree in co-relation 58934. Up to 7460 conditions per place. [2024-06-04 16:05:34,167 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 262 selfloop transitions, 207 changer transitions 0/475 dead transitions. [2024-06-04 16:05:34,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 475 transitions, 7929 flow [2024-06-04 16:05:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:05:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:05:34,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-06-04 16:05:34,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264227642276422 [2024-06-04 16:05:34,168 INFO L175 Difference]: Start difference. First operand has 393 places, 443 transitions, 6889 flow. Second operand 12 states and 259 transitions. [2024-06-04 16:05:34,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 475 transitions, 7929 flow [2024-06-04 16:05:38,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 475 transitions, 7754 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 16:05:38,074 INFO L231 Difference]: Finished difference. Result has 399 places, 443 transitions, 7133 flow [2024-06-04 16:05:38,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6714, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7133, PETRI_PLACES=399, PETRI_TRANSITIONS=443} [2024-06-04 16:05:38,075 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-04 16:05:38,075 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 443 transitions, 7133 flow [2024-06-04 16:05:38,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:38,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:38,075 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] [2024-06-04 16:05:38,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 16:05:38,075 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)] === [2024-06-04 16:05:38,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:38,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1510195908, now seen corresponding path program 13 times [2024-06-04 16:05:38,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:38,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211552098] [2024-06-04 16:05:38,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:38,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:38,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:38,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211552098] [2024-06-04 16:05:38,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211552098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:38,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:38,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:38,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482673699] [2024-06-04 16:05:38,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:38,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:38,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:38,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:38,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:38,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:38,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 443 transitions, 7133 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:38,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:38,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:38,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:40,120 INFO L124 PetriNetUnfolderBase]: 5088/8653 cut-off events. [2024-06-04 16:05:40,121 INFO L125 PetriNetUnfolderBase]: For 880367/880367 co-relation queries the response was YES. [2024-06-04 16:05:40,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59880 conditions, 8653 events. 5088/8653 cut-off events. For 880367/880367 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 63688 event pairs, 1689 based on Foata normal form. 8/8659 useless extension candidates. Maximal degree in co-relation 59696. Up to 7504 conditions per place. [2024-06-04 16:05:40,245 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 267 selfloop transitions, 199 changer transitions 0/472 dead transitions. [2024-06-04 16:05:40,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 472 transitions, 8183 flow [2024-06-04 16:05:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:05:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:05:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-04 16:05:40,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5299334811529933 [2024-06-04 16:05:40,246 INFO L175 Difference]: Start difference. First operand has 399 places, 443 transitions, 7133 flow. Second operand 11 states and 239 transitions. [2024-06-04 16:05:40,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 472 transitions, 8183 flow [2024-06-04 16:05:43,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 472 transitions, 7708 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-04 16:05:43,955 INFO L231 Difference]: Finished difference. Result has 399 places, 444 transitions, 7089 flow [2024-06-04 16:05:43,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6658, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7089, PETRI_PLACES=399, PETRI_TRANSITIONS=444} [2024-06-04 16:05:43,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-04 16:05:43,956 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 444 transitions, 7089 flow [2024-06-04 16:05:43,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:43,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:43,956 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] [2024-06-04 16:05:43,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 16:05:43,956 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)] === [2024-06-04 16:05:43,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:43,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1017442828, now seen corresponding path program 14 times [2024-06-04 16:05:43,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:43,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107830528] [2024-06-04 16:05:43,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:43,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:44,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:44,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107830528] [2024-06-04 16:05:44,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107830528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:44,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:44,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:44,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648661192] [2024-06-04 16:05:44,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:44,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:44,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:44,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:44,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:44,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 444 transitions, 7089 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:44,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:44,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:44,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:46,003 INFO L124 PetriNetUnfolderBase]: 5001/8518 cut-off events. [2024-06-04 16:05:46,004 INFO L125 PetriNetUnfolderBase]: For 841826/841828 co-relation queries the response was YES. [2024-06-04 16:05:46,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54467 conditions, 8518 events. 5001/8518 cut-off events. For 841826/841828 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 62680 event pairs, 1632 based on Foata normal form. 44/8554 useless extension candidates. Maximal degree in co-relation 54282. Up to 7343 conditions per place. [2024-06-04 16:05:46,113 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 359 selfloop transitions, 108 changer transitions 3/476 dead transitions. [2024-06-04 16:05:46,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 476 transitions, 8145 flow [2024-06-04 16:05:46,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:05:46,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:05:46,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:05:46,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-04 16:05:46,114 INFO L175 Difference]: Start difference. First operand has 399 places, 444 transitions, 7089 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:05:46,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 476 transitions, 8145 flow [2024-06-04 16:05:49,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 476 transitions, 7714 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-04 16:05:49,288 INFO L231 Difference]: Finished difference. Result has 397 places, 443 transitions, 6868 flow [2024-06-04 16:05:49,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6658, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6868, PETRI_PLACES=397, PETRI_TRANSITIONS=443} [2024-06-04 16:05:49,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-04 16:05:49,289 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 443 transitions, 6868 flow [2024-06-04 16:05:49,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:49,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:49,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:49,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 16:05:49,290 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)] === [2024-06-04 16:05:49,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:49,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1598844996, now seen corresponding path program 1 times [2024-06-04 16:05:49,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:49,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723628962] [2024-06-04 16:05:49,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:49,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:49,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:49,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723628962] [2024-06-04 16:05:49,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723628962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:49,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:49,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:49,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509977756] [2024-06-04 16:05:49,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:49,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:49,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:49,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:49,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 443 transitions, 6868 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:49,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:49,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:49,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:51,525 INFO L124 PetriNetUnfolderBase]: 5191/8812 cut-off events. [2024-06-04 16:05:51,525 INFO L125 PetriNetUnfolderBase]: For 861392/861392 co-relation queries the response was YES. [2024-06-04 16:05:51,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60150 conditions, 8812 events. 5191/8812 cut-off events. For 861392/861392 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 65005 event pairs, 1551 based on Foata normal form. 6/8782 useless extension candidates. Maximal degree in co-relation 59964. Up to 5994 conditions per place. [2024-06-04 16:05:51,636 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 228 changer transitions 0/492 dead transitions. [2024-06-04 16:05:51,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 492 transitions, 8382 flow [2024-06-04 16:05:51,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:05:51,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:05:51,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-04 16:05:51,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565410199556541 [2024-06-04 16:05:51,637 INFO L175 Difference]: Start difference. First operand has 397 places, 443 transitions, 6868 flow. Second operand 11 states and 255 transitions. [2024-06-04 16:05:51,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 492 transitions, 8382 flow [2024-06-04 16:05:55,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 492 transitions, 8175 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-04 16:05:55,463 INFO L231 Difference]: Finished difference. Result has 404 places, 446 transitions, 7258 flow [2024-06-04 16:05:55,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6661, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7258, PETRI_PLACES=404, PETRI_TRANSITIONS=446} [2024-06-04 16:05:55,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-04 16:05:55,463 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 446 transitions, 7258 flow [2024-06-04 16:05:55,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:55,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:55,464 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] [2024-06-04 16:05:55,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 16:05:55,464 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)] === [2024-06-04 16:05:55,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:55,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1598546466, now seen corresponding path program 2 times [2024-06-04 16:05:55,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:55,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506187595] [2024-06-04 16:05:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:55,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:55,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:55,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:55,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506187595] [2024-06-04 16:05:55,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506187595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:55,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:55,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:05:55,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854742153] [2024-06-04 16:05:55,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:55,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:05:55,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:55,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:05:55,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:05:55,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:05:55,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 446 transitions, 7258 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:55,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:55,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:05:55,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:57,650 INFO L124 PetriNetUnfolderBase]: 5211/8842 cut-off events. [2024-06-04 16:05:57,650 INFO L125 PetriNetUnfolderBase]: For 882190/882190 co-relation queries the response was YES. [2024-06-04 16:05:57,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61322 conditions, 8842 events. 5211/8842 cut-off events. For 882190/882190 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 65249 event pairs, 1606 based on Foata normal form. 6/8812 useless extension candidates. Maximal degree in co-relation 61134. Up to 6006 conditions per place. [2024-06-04 16:05:57,767 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 257 selfloop transitions, 225 changer transitions 0/488 dead transitions. [2024-06-04 16:05:57,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 488 transitions, 8662 flow [2024-06-04 16:05:57,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:05:57,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:05:57,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-04 16:05:57,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543237250554324 [2024-06-04 16:05:57,768 INFO L175 Difference]: Start difference. First operand has 404 places, 446 transitions, 7258 flow. Second operand 11 states and 250 transitions. [2024-06-04 16:05:57,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 488 transitions, 8662 flow [2024-06-04 16:06:01,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 488 transitions, 8238 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-04 16:06:01,809 INFO L231 Difference]: Finished difference. Result has 408 places, 447 transitions, 7329 flow [2024-06-04 16:06:01,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6850, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7329, PETRI_PLACES=408, PETRI_TRANSITIONS=447} [2024-06-04 16:06:01,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-04 16:06:01,809 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 447 transitions, 7329 flow [2024-06-04 16:06:01,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:01,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:01,810 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] [2024-06-04 16:06:01,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 16:06:01,810 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)] === [2024-06-04 16:06:01,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:01,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1509980706, now seen corresponding path program 3 times [2024-06-04 16:06:01,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:01,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022438350] [2024-06-04 16:06:01,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:01,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:02,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:02,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022438350] [2024-06-04 16:06:02,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022438350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:02,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:02,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:02,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786533617] [2024-06-04 16:06:02,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:02,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:02,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:02,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:02,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:02,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:02,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 447 transitions, 7329 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:02,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:02,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:02,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:04,003 INFO L124 PetriNetUnfolderBase]: 5231/8914 cut-off events. [2024-06-04 16:06:04,004 INFO L125 PetriNetUnfolderBase]: For 887645/887645 co-relation queries the response was YES. [2024-06-04 16:06:04,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61730 conditions, 8914 events. 5231/8914 cut-off events. For 887645/887645 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 66143 event pairs, 1754 based on Foata normal form. 6/8914 useless extension candidates. Maximal degree in co-relation 61540. Up to 7619 conditions per place. [2024-06-04 16:06:04,119 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 270 selfloop transitions, 203 changer transitions 0/479 dead transitions. [2024-06-04 16:06:04,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 479 transitions, 8411 flow [2024-06-04 16:06:04,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:06:04,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:06:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-04 16:06:04,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-04 16:06:04,120 INFO L175 Difference]: Start difference. First operand has 408 places, 447 transitions, 7329 flow. Second operand 11 states and 241 transitions. [2024-06-04 16:06:04,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 479 transitions, 8411 flow [2024-06-04 16:06:07,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 479 transitions, 8002 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-04 16:06:07,832 INFO L231 Difference]: Finished difference. Result has 411 places, 448 transitions, 7359 flow [2024-06-04 16:06:07,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6921, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7359, PETRI_PLACES=411, PETRI_TRANSITIONS=448} [2024-06-04 16:06:07,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-04 16:06:07,832 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 448 transitions, 7359 flow [2024-06-04 16:06:07,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:07,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:07,833 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] [2024-06-04 16:06:07,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 16:06:07,833 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)] === [2024-06-04 16:06:07,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:07,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1331130464, now seen corresponding path program 4 times [2024-06-04 16:06:07,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:07,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532745306] [2024-06-04 16:06:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:07,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:08,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:08,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:08,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532745306] [2024-06-04 16:06:08,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532745306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:08,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:08,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:08,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208877817] [2024-06-04 16:06:08,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:08,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:08,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:08,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:08,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:08,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:08,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 448 transitions, 7359 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:08,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:08,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:08,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:10,003 INFO L124 PetriNetUnfolderBase]: 5159/8792 cut-off events. [2024-06-04 16:06:10,004 INFO L125 PetriNetUnfolderBase]: For 860471/860473 co-relation queries the response was YES. [2024-06-04 16:06:10,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56858 conditions, 8792 events. 5159/8792 cut-off events. For 860471/860473 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 65210 event pairs, 1545 based on Foata normal form. 38/8806 useless extension candidates. Maximal degree in co-relation 56667. Up to 6586 conditions per place. [2024-06-04 16:06:10,130 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 355 selfloop transitions, 117 changer transitions 8/486 dead transitions. [2024-06-04 16:06:10,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 486 transitions, 8485 flow [2024-06-04 16:06:10,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:06:10,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:06:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-04 16:06:10,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-04 16:06:10,131 INFO L175 Difference]: Start difference. First operand has 411 places, 448 transitions, 7359 flow. Second operand 7 states and 180 transitions. [2024-06-04 16:06:10,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 486 transitions, 8485 flow [2024-06-04 16:06:13,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 486 transitions, 8044 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-04 16:06:13,792 INFO L231 Difference]: Finished difference. Result has 409 places, 445 transitions, 7096 flow [2024-06-04 16:06:13,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6918, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7096, PETRI_PLACES=409, PETRI_TRANSITIONS=445} [2024-06-04 16:06:13,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-04 16:06:13,792 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 445 transitions, 7096 flow [2024-06-04 16:06:13,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:13,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:13,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:13,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 16:06:13,793 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)] === [2024-06-04 16:06:13,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:13,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2144664964, now seen corresponding path program 15 times [2024-06-04 16:06:13,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:13,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784968439] [2024-06-04 16:06:13,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:13,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:13,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:13,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784968439] [2024-06-04 16:06:13,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784968439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:13,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:13,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:13,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483573697] [2024-06-04 16:06:13,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:13,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:13,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:13,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:13,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:14,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:14,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 445 transitions, 7096 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:14,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:14,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:14,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:16,107 INFO L124 PetriNetUnfolderBase]: 5308/9059 cut-off events. [2024-06-04 16:06:16,108 INFO L125 PetriNetUnfolderBase]: For 951246/951250 co-relation queries the response was YES. [2024-06-04 16:06:16,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62777 conditions, 9059 events. 5308/9059 cut-off events. For 951246/951250 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 67483 event pairs, 1821 based on Foata normal form. 10/9067 useless extension candidates. Maximal degree in co-relation 62585. Up to 7405 conditions per place. [2024-06-04 16:06:16,233 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 304 selfloop transitions, 177 changer transitions 0/487 dead transitions. [2024-06-04 16:06:16,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 487 transitions, 8565 flow [2024-06-04 16:06:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:06:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:06:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 261 transitions. [2024-06-04 16:06:16,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-04 16:06:16,234 INFO L175 Difference]: Start difference. First operand has 409 places, 445 transitions, 7096 flow. Second operand 12 states and 261 transitions. [2024-06-04 16:06:16,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 487 transitions, 8565 flow [2024-06-04 16:06:20,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 487 transitions, 8239 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 16:06:20,314 INFO L231 Difference]: Finished difference. Result has 414 places, 448 transitions, 7267 flow [2024-06-04 16:06:20,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6772, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7267, PETRI_PLACES=414, PETRI_TRANSITIONS=448} [2024-06-04 16:06:20,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-04 16:06:20,315 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 448 transitions, 7267 flow [2024-06-04 16:06:20,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:20,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:20,315 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] [2024-06-04 16:06:20,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 16:06:20,315 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)] === [2024-06-04 16:06:20,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash -2083877518, now seen corresponding path program 16 times [2024-06-04 16:06:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:20,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939660250] [2024-06-04 16:06:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:20,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:20,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:20,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:20,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939660250] [2024-06-04 16:06:20,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939660250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:20,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:20,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:20,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249536311] [2024-06-04 16:06:20,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:20,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:20,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:20,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:20,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:20,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:20,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 448 transitions, 7267 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:20,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:20,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:20,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:22,405 INFO L124 PetriNetUnfolderBase]: 5290/9033 cut-off events. [2024-06-04 16:06:22,405 INFO L125 PetriNetUnfolderBase]: For 895978/895982 co-relation queries the response was YES. [2024-06-04 16:06:22,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61484 conditions, 9033 events. 5290/9033 cut-off events. For 895978/895982 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 67409 event pairs, 1829 based on Foata normal form. 10/9041 useless extension candidates. Maximal degree in co-relation 61291. Up to 7854 conditions per place. [2024-06-04 16:06:22,525 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 298 selfloop transitions, 173 changer transitions 0/477 dead transitions. [2024-06-04 16:06:22,526 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 477 transitions, 8303 flow [2024-06-04 16:06:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:06:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:06:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-04 16:06:22,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-04 16:06:22,527 INFO L175 Difference]: Start difference. First operand has 414 places, 448 transitions, 7267 flow. Second operand 12 states and 252 transitions. [2024-06-04 16:06:22,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 477 transitions, 8303 flow [2024-06-04 16:06:26,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 477 transitions, 7663 flow, removed 40 selfloop flow, removed 11 redundant places. [2024-06-04 16:06:26,880 INFO L231 Difference]: Finished difference. Result has 415 places, 448 transitions, 6978 flow [2024-06-04 16:06:26,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6627, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6978, PETRI_PLACES=415, PETRI_TRANSITIONS=448} [2024-06-04 16:06:26,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-04 16:06:26,881 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 448 transitions, 6978 flow [2024-06-04 16:06:26,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:26,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:26,881 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] [2024-06-04 16:06:26,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 16:06:26,881 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)] === [2024-06-04 16:06:26,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:26,881 INFO L85 PathProgramCache]: Analyzing trace with hash -776753954, now seen corresponding path program 17 times [2024-06-04 16:06:26,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:26,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749720127] [2024-06-04 16:06:26,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:26,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:27,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:27,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749720127] [2024-06-04 16:06:27,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749720127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:27,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:27,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:27,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782729372] [2024-06-04 16:06:27,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:27,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:27,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:27,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:27,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:27,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:27,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 448 transitions, 6978 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:27,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:27,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:27,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:28,984 INFO L124 PetriNetUnfolderBase]: 5272/9007 cut-off events. [2024-06-04 16:06:28,984 INFO L125 PetriNetUnfolderBase]: For 842955/842959 co-relation queries the response was YES. [2024-06-04 16:06:29,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58747 conditions, 9007 events. 5272/9007 cut-off events. For 842955/842959 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 67159 event pairs, 1821 based on Foata normal form. 10/9015 useless extension candidates. Maximal degree in co-relation 58555. Up to 7828 conditions per place. [2024-06-04 16:06:29,103 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 298 selfloop transitions, 169 changer transitions 0/473 dead transitions. [2024-06-04 16:06:29,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 473 transitions, 7996 flow [2024-06-04 16:06:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:06:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:06:29,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-04 16:06:29,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188470066518847 [2024-06-04 16:06:29,104 INFO L175 Difference]: Start difference. First operand has 415 places, 448 transitions, 6978 flow. Second operand 11 states and 234 transitions. [2024-06-04 16:06:29,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 473 transitions, 7996 flow [2024-06-04 16:06:33,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 473 transitions, 7642 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-04 16:06:33,859 INFO L231 Difference]: Finished difference. Result has 416 places, 448 transitions, 6967 flow [2024-06-04 16:06:33,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6624, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6967, PETRI_PLACES=416, PETRI_TRANSITIONS=448} [2024-06-04 16:06:33,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-04 16:06:33,859 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 448 transitions, 6967 flow [2024-06-04 16:06:33,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:33,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:33,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:33,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 16:06:33,860 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)] === [2024-06-04 16:06:33,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:33,860 INFO L85 PathProgramCache]: Analyzing trace with hash 413398844, now seen corresponding path program 18 times [2024-06-04 16:06:33,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:33,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307746736] [2024-06-04 16:06:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:33,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:34,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:34,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307746736] [2024-06-04 16:06:34,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307746736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:34,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:34,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:34,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032154468] [2024-06-04 16:06:34,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:34,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:34,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:34,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:34,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:34,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:34,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 448 transitions, 6967 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:34,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:34,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:34,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:36,160 INFO L124 PetriNetUnfolderBase]: 5376/9179 cut-off events. [2024-06-04 16:06:36,160 INFO L125 PetriNetUnfolderBase]: For 1045605/1045609 co-relation queries the response was YES. [2024-06-04 16:06:36,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59682 conditions, 9179 events. 5376/9179 cut-off events. For 1045605/1045609 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 68660 event pairs, 1861 based on Foata normal form. 36/9213 useless extension candidates. Maximal degree in co-relation 59490. Up to 7866 conditions per place. [2024-06-04 16:06:36,281 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 309 selfloop transitions, 154 changer transitions 3/472 dead transitions. [2024-06-04 16:06:36,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 472 transitions, 8009 flow [2024-06-04 16:06:36,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:06:36,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:06:36,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-04 16:06:36,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-04 16:06:36,282 INFO L175 Difference]: Start difference. First operand has 416 places, 448 transitions, 6967 flow. Second operand 10 states and 217 transitions. [2024-06-04 16:06:36,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 472 transitions, 8009 flow [2024-06-04 16:06:40,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 472 transitions, 7660 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-04 16:06:40,813 INFO L231 Difference]: Finished difference. Result has 417 places, 448 transitions, 6938 flow [2024-06-04 16:06:40,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6618, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6938, PETRI_PLACES=417, PETRI_TRANSITIONS=448} [2024-06-04 16:06:40,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-04 16:06:40,814 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 448 transitions, 6938 flow [2024-06-04 16:06:40,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:40,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:40,814 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] [2024-06-04 16:06:40,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 16:06:40,815 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)] === [2024-06-04 16:06:40,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:40,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1730807570, now seen corresponding path program 19 times [2024-06-04 16:06:40,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:40,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454363106] [2024-06-04 16:06:40,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:40,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:40,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:41,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:41,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:41,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454363106] [2024-06-04 16:06:41,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454363106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:41,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:41,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:41,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375159016] [2024-06-04 16:06:41,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:41,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:41,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:41,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:41,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:41,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:41,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 448 transitions, 6938 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:41,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:41,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:41,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:42,875 INFO L124 PetriNetUnfolderBase]: 5297/9062 cut-off events. [2024-06-04 16:06:42,875 INFO L125 PetriNetUnfolderBase]: For 810547/810551 co-relation queries the response was YES. [2024-06-04 16:06:42,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55018 conditions, 9062 events. 5297/9062 cut-off events. For 810547/810551 co-relation queries the response was YES. Maximal size of possible extension queue 649. Compared 67835 event pairs, 1840 based on Foata normal form. 36/9096 useless extension candidates. Maximal degree in co-relation 54825. Up to 7734 conditions per place. [2024-06-04 16:06:42,999 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 343 selfloop transitions, 125 changer transitions 3/477 dead transitions. [2024-06-04 16:06:42,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 477 transitions, 7988 flow [2024-06-04 16:06:43,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:06:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:06:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 16:06:43,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-04 16:06:43,000 INFO L175 Difference]: Start difference. First operand has 417 places, 448 transitions, 6938 flow. Second operand 7 states and 172 transitions. [2024-06-04 16:06:43,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 477 transitions, 7988 flow [2024-06-04 16:06:46,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 477 transitions, 7655 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-04 16:06:46,433 INFO L231 Difference]: Finished difference. Result has 415 places, 447 transitions, 6845 flow [2024-06-04 16:06:46,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6605, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6845, PETRI_PLACES=415, PETRI_TRANSITIONS=447} [2024-06-04 16:06:46,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-04 16:06:46,433 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 447 transitions, 6845 flow [2024-06-04 16:06:46,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:46,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:46,433 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] [2024-06-04 16:06:46,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 16:06:46,434 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)] === [2024-06-04 16:06:46,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:46,434 INFO L85 PathProgramCache]: Analyzing trace with hash -253713304, now seen corresponding path program 5 times [2024-06-04 16:06:46,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:46,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153454431] [2024-06-04 16:06:46,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:46,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:46,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:46,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:46,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153454431] [2024-06-04 16:06:46,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153454431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:46,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:46,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:46,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140034063] [2024-06-04 16:06:46,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:46,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:46,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:46,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:46,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:46,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:46,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 447 transitions, 6845 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:46,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:46,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:46,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:48,845 INFO L124 PetriNetUnfolderBase]: 5454/9341 cut-off events. [2024-06-04 16:06:48,845 INFO L125 PetriNetUnfolderBase]: For 843200/843204 co-relation queries the response was YES. [2024-06-04 16:06:48,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60129 conditions, 9341 events. 5454/9341 cut-off events. For 843200/843204 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 70189 event pairs, 1800 based on Foata normal form. 8/9347 useless extension candidates. Maximal degree in co-relation 59935. Up to 7099 conditions per place. [2024-06-04 16:06:48,965 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 301 selfloop transitions, 185 changer transitions 0/492 dead transitions. [2024-06-04 16:06:48,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 492 transitions, 8338 flow [2024-06-04 16:06:48,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:06:48,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:06:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-04 16:06:48,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543237250554324 [2024-06-04 16:06:48,966 INFO L175 Difference]: Start difference. First operand has 415 places, 447 transitions, 6845 flow. Second operand 11 states and 250 transitions. [2024-06-04 16:06:48,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 492 transitions, 8338 flow [2024-06-04 16:06:53,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 492 transitions, 8077 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-04 16:06:53,450 INFO L231 Difference]: Finished difference. Result has 421 places, 449 transitions, 7060 flow [2024-06-04 16:06:53,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6584, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7060, PETRI_PLACES=421, PETRI_TRANSITIONS=449} [2024-06-04 16:06:53,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-04 16:06:53,451 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 449 transitions, 7060 flow [2024-06-04 16:06:53,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:53,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:53,451 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] [2024-06-04 16:06:53,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 16:06:53,451 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)] === [2024-06-04 16:06:53,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:53,452 INFO L85 PathProgramCache]: Analyzing trace with hash -253703074, now seen corresponding path program 6 times [2024-06-04 16:06:53,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:53,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136216713] [2024-06-04 16:06:53,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:53,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:53,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:53,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136216713] [2024-06-04 16:06:53,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136216713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:53,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:53,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:06:53,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115061685] [2024-06-04 16:06:53,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:53,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:06:53,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:53,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:06:53,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:06:53,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:06:53,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 449 transitions, 7060 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:53,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:53,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:06:53,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:55,598 INFO L124 PetriNetUnfolderBase]: 5474/9371 cut-off events. [2024-06-04 16:06:55,598 INFO L125 PetriNetUnfolderBase]: For 861467/861471 co-relation queries the response was YES. [2024-06-04 16:06:55,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60928 conditions, 9371 events. 5474/9371 cut-off events. For 861467/861471 co-relation queries the response was YES. Maximal size of possible extension queue 674. Compared 70429 event pairs, 1887 based on Foata normal form. 8/9377 useless extension candidates. Maximal degree in co-relation 60732. Up to 7111 conditions per place. [2024-06-04 16:06:55,726 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 299 selfloop transitions, 183 changer transitions 0/488 dead transitions. [2024-06-04 16:06:55,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 488 transitions, 8476 flow [2024-06-04 16:06:55,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:06:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:06:55,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 245 transitions. [2024-06-04 16:06:55,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5432372505543237 [2024-06-04 16:06:55,727 INFO L175 Difference]: Start difference. First operand has 421 places, 449 transitions, 7060 flow. Second operand 11 states and 245 transitions. [2024-06-04 16:06:55,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 488 transitions, 8476 flow [2024-06-04 16:07:00,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 488 transitions, 7884 flow, removed 54 selfloop flow, removed 10 redundant places. [2024-06-04 16:07:00,938 INFO L231 Difference]: Finished difference. Result has 422 places, 450 transitions, 6882 flow [2024-06-04 16:07:00,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6489, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6882, PETRI_PLACES=422, PETRI_TRANSITIONS=450} [2024-06-04 16:07:00,938 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-04 16:07:00,938 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 450 transitions, 6882 flow [2024-06-04 16:07:00,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:00,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:00,939 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] [2024-06-04 16:07:00,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 16:07:00,939 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)] === [2024-06-04 16:07:00,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:00,939 INFO L85 PathProgramCache]: Analyzing trace with hash -776538752, now seen corresponding path program 7 times [2024-06-04 16:07:00,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:00,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381824174] [2024-06-04 16:07:00,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:00,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:01,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:01,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381824174] [2024-06-04 16:07:01,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381824174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:01,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:01,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:07:01,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514153719] [2024-06-04 16:07:01,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:01,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:07:01,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:01,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:07:01,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:07:01,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-04 16:07:01,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 450 transitions, 6882 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:01,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:01,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-04 16:07:01,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:03,209 INFO L124 PetriNetUnfolderBase]: 5461/9358 cut-off events. [2024-06-04 16:07:03,210 INFO L125 PetriNetUnfolderBase]: For 827171/827175 co-relation queries the response was YES. [2024-06-04 16:07:03,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58723 conditions, 9358 events. 5461/9358 cut-off events. For 827171/827175 co-relation queries the response was YES. Maximal size of possible extension queue 672. Compared 70577 event pairs, 1906 based on Foata normal form. 8/9364 useless extension candidates. Maximal degree in co-relation 58528. Up to 8089 conditions per place. [2024-06-04 16:07:03,332 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 302 selfloop transitions, 170 changer transitions 0/478 dead transitions. [2024-06-04 16:07:03,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 478 transitions, 7928 flow [2024-06-04 16:07:03,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:07:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:07:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-04 16:07:03,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-04 16:07:03,333 INFO L175 Difference]: Start difference. First operand has 422 places, 450 transitions, 6882 flow. Second operand 11 states and 236 transitions. [2024-06-04 16:07:03,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 478 transitions, 7928 flow