./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe037.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/safe037.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe037.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe037.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 14:08:21,562 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 14:08:21,622 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 14:08:21,628 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 14:08:21,628 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 14:08:21,648 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 14:08:21,648 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 14:08:21,648 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 14:08:21,649 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 14:08:21,649 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 14:08:21,649 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 14:08:21,650 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 14:08:21,650 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 14:08:21,650 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 14:08:21,650 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 14:08:21,651 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 14:08:21,651 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 14:08:21,651 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 14:08:21,652 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 14:08:21,652 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 14:08:21,652 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 14:08:21,653 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 14:08:21,653 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 14:08:21,653 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 14:08:21,653 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 14:08:21,654 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 14:08:21,654 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 14:08:21,654 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 14:08:21,655 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 14:08:21,655 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 14:08:21,655 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 14:08:21,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 14:08:21,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:08:21,656 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 14:08:21,656 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 14:08:21,656 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 14:08:21,657 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 14:08:21,657 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 14:08:21,657 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 14:08:21,657 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 14:08:21,657 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 14:08:21,658 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 14:08:21,658 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 14:08:21,658 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 14:08:21,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 14:08:21,900 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 14:08:21,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 14:08:21,903 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 14:08:21,905 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 14:08:21,906 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe037.yml/witness.yml [2024-06-14 14:08:22,057 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 14:08:22,057 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 14:08:22,058 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe037.i [2024-06-14 14:08:23,163 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 14:08:23,343 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 14:08:23,344 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe037.i [2024-06-14 14:08:23,378 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3758dd324/94a605b61a474a1c85273fd804819598/FLAG71181d1b9 [2024-06-14 14:08:23,392 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3758dd324/94a605b61a474a1c85273fd804819598 [2024-06-14 14:08:23,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 14:08:23,394 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 14:08:23,396 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 14:08:23,397 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 14:08:23,400 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 14:08:23,401 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:08:22" (1/2) ... [2024-06-14 14:08:23,402 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9f3f37 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:08:23, skipping insertion in model container [2024-06-14 14:08:23,402 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:08:22" (1/2) ... [2024-06-14 14:08:23,404 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@76f88668 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 02:08:23, skipping insertion in model container [2024-06-14 14:08:23,404 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:08:23" (2/2) ... [2024-06-14 14:08:23,404 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d9f3f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23, skipping insertion in model container [2024-06-14 14:08:23,404 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 02:08:23" (2/2) ... [2024-06-14 14:08:23,405 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 14:08:23,448 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 14:08:23,450 INFO L97 edCorrectnessWitness]: Location invariant before [L789-L789] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (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) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 14:08:23,450 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 14:08:23,450 INFO L97 edCorrectnessWitness]: Location invariant before [L792-L792] ((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p2_EAX) + (long long )z >= 0LL && (1LL - (long long )__unbuffered_p2_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )x >= 0LL) && (1LL - (long long )__unbuffered_p2_EAX) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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_p0_EAX + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (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) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )__unbuffered_p2_EAX >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )z >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (1LL + (long long )x) - (long long )z >= 0LL) && (1LL + (long long )y) - (long long )z >= 0LL) && (2LL - (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL))) && (! multithreaded || ((((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 14:08:23,450 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 14:08:23,450 INFO L106 edCorrectnessWitness]: ghost_update [L787-L787] multithreaded = 1; [2024-06-14 14:08:23,490 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 14:08:23,733 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:08:23,741 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 14:08:23,865 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 14:08:23,906 INFO L206 MainTranslator]: Completed translation [2024-06-14 14:08:23,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23 WrapperNode [2024-06-14 14:08:23,908 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 14:08:23,909 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 14:08:23,909 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 14:08:23,910 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 14:08:23,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23" (1/1) ... [2024-06-14 14:08:23,931 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23" (1/1) ... [2024-06-14 14:08:23,965 INFO L138 Inliner]: procedures = 175, calls = 48, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-14 14:08:23,965 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 14:08:23,966 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 14:08:23,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 14:08:23,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 14:08:23,979 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23" (1/1) ... [2024-06-14 14:08:23,980 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23" (1/1) ... [2024-06-14 14:08:23,985 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23" (1/1) ... [2024-06-14 14:08:24,003 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 14:08:24,004 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23" (1/1) ... [2024-06-14 14:08:24,004 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23" (1/1) ... [2024-06-14 14:08:24,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23" (1/1) ... [2024-06-14 14:08:24,011 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23" (1/1) ... [2024-06-14 14:08:24,012 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23" (1/1) ... [2024-06-14 14:08:24,013 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23" (1/1) ... [2024-06-14 14:08:24,016 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 14:08:24,017 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 14:08:24,017 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 14:08:24,017 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 14:08:24,017 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23" (1/1) ... [2024-06-14 14:08:24,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 14:08:24,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 14:08:24,053 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 14:08:24,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 14:08:24,086 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 14:08:24,086 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 14:08:24,086 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 14:08:24,086 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 14:08:24,086 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 14:08:24,086 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 14:08:24,087 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 14:08:24,087 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 14:08:24,087 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 14:08:24,087 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 14:08:24,087 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 14:08:24,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 14:08:24,088 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 14:08:24,232 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 14:08:24,234 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 14:08:24,567 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 14:08:24,567 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 14:08:24,651 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 14:08:24,652 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 14:08:24,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:08:24 BoogieIcfgContainer [2024-06-14 14:08:24,652 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 14:08:24,655 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 14:08:24,655 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 14:08:24,657 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 14:08:24,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 02:08:22" (1/4) ... [2024-06-14 14:08:24,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5474c1bf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 02:08:24, skipping insertion in model container [2024-06-14 14:08:24,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 02:08:23" (2/4) ... [2024-06-14 14:08:24,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5474c1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:08:24, skipping insertion in model container [2024-06-14 14:08:24,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 02:08:23" (3/4) ... [2024-06-14 14:08:24,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5474c1bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 02:08:24, skipping insertion in model container [2024-06-14 14:08:24,659 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 02:08:24" (4/4) ... [2024-06-14 14:08:24,659 INFO L112 eAbstractionObserver]: Analyzing ICFG safe037.i [2024-06-14 14:08:24,672 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 14:08:24,672 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 14:08:24,672 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 14:08:24,722 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 14:08:24,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 14:08:24,781 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-14 14:08:24,786 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:08:24,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 14:08:24,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-14 14:08:24,790 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-14 14:08:24,796 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 14:08:24,802 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;@a08864c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 14:08:24,802 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 14:08:24,808 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 14:08:24,808 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 14:08:24,808 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 14:08:24,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:24,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 14:08:24,809 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:24,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:24,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1558372378, now seen corresponding path program 1 times [2024-06-14 14:08:24,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:24,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092395851] [2024-06-14 14:08:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:24,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:25,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:25,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:25,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092395851] [2024-06-14 14:08:25,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092395851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:25,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:25,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 14:08:25,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654024335] [2024-06-14 14:08:25,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:25,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 14:08:25,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:25,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 14:08:25,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 14:08:25,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 44 [2024-06-14 14:08:25,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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) [2024-06-14 14:08:25,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:25,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 44 [2024-06-14 14:08:25,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:25,728 INFO L124 PetriNetUnfolderBase]: 471/887 cut-off events. [2024-06-14 14:08:25,728 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-14 14:08:25,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 887 events. 471/887 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4817 event pairs, 288 based on Foata normal form. 1/815 useless extension candidates. Maximal degree in co-relation 1662. Up to 733 conditions per place. [2024-06-14 14:08:25,737 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 29 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 14:08:25,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 171 flow [2024-06-14 14:08:25,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 14:08:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 14:08:25,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-14 14:08:25,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7045454545454546 [2024-06-14 14:08:25,748 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 93 transitions. [2024-06-14 14:08:25,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 171 flow [2024-06-14 14:08:25,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:25,751 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-14 14:08:25,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 14:08:25,755 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-14 14:08:25,755 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-14 14:08:25,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 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) [2024-06-14 14:08:25,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:25,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:25,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 14:08:25,756 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:25,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:25,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1347776261, now seen corresponding path program 1 times [2024-06-14 14:08:25,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:25,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114284471] [2024-06-14 14:08:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:25,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:26,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:26,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114284471] [2024-06-14 14:08:26,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114284471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:26,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:26,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:08:26,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196377891] [2024-06-14 14:08:26,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:26,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:08:26,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:26,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:08:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:08:26,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-14 14:08:26,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:26,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:26,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-14 14:08:26,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:26,425 INFO L124 PetriNetUnfolderBase]: 569/991 cut-off events. [2024-06-14 14:08:26,426 INFO L125 PetriNetUnfolderBase]: For 204/204 co-relation queries the response was YES. [2024-06-14 14:08:26,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2228 conditions, 991 events. 569/991 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5233 event pairs, 293 based on Foata normal form. 3/962 useless extension candidates. Maximal degree in co-relation 2213. Up to 861 conditions per place. [2024-06-14 14:08:26,433 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 37 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 14:08:26,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 240 flow [2024-06-14 14:08:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:08:26,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:08:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 119 transitions. [2024-06-14 14:08:26,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6761363636363636 [2024-06-14 14:08:26,437 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 119 transitions. [2024-06-14 14:08:26,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 240 flow [2024-06-14 14:08:26,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 14:08:26,440 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-14 14:08:26,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-14 14:08:26,441 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-14 14:08:26,441 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-14 14:08:26,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:26,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:26,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:26,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 14:08:26,444 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:26,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:26,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1155941006, now seen corresponding path program 1 times [2024-06-14 14:08:26,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:26,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725325055] [2024-06-14 14:08:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:26,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:26,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:26,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:26,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725325055] [2024-06-14 14:08:26,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725325055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:26,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:26,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:08:26,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739362661] [2024-06-14 14:08:26,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:26,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:08:26,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:26,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:08:26,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:08:27,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-14 14:08:27,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:27,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:27,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-14 14:08:27,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:27,132 INFO L124 PetriNetUnfolderBase]: 590/1136 cut-off events. [2024-06-14 14:08:27,132 INFO L125 PetriNetUnfolderBase]: For 569/569 co-relation queries the response was YES. [2024-06-14 14:08:27,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2723 conditions, 1136 events. 590/1136 cut-off events. For 569/569 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 6345 event pairs, 313 based on Foata normal form. 2/1112 useless extension candidates. Maximal degree in co-relation 2706. Up to 903 conditions per place. [2024-06-14 14:08:27,139 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 37 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 14:08:27,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 270 flow [2024-06-14 14:08:27,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:08:27,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:08:27,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-14 14:08:27,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6534090909090909 [2024-06-14 14:08:27,140 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 4 states and 115 transitions. [2024-06-14 14:08:27,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 270 flow [2024-06-14 14:08:27,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 256 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 14:08:27,142 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 168 flow [2024-06-14 14:08:27,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-06-14 14:08:27,143 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 5 predicate places. [2024-06-14 14:08:27,143 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 168 flow [2024-06-14 14:08:27,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:27,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:27,144 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:27,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 14:08:27,144 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:27,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:27,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1786628943, now seen corresponding path program 1 times [2024-06-14 14:08:27,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:27,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362669626] [2024-06-14 14:08:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:27,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:27,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:27,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362669626] [2024-06-14 14:08:27,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362669626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:27,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:27,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:27,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698283014] [2024-06-14 14:08:27,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:27,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:27,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:27,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:27,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:27,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:27,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 168 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:27,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:27,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:27,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:27,659 INFO L124 PetriNetUnfolderBase]: 714/1293 cut-off events. [2024-06-14 14:08:27,659 INFO L125 PetriNetUnfolderBase]: For 1149/1197 co-relation queries the response was YES. [2024-06-14 14:08:27,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3429 conditions, 1293 events. 714/1293 cut-off events. For 1149/1197 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7077 event pairs, 212 based on Foata normal form. 6/1264 useless extension candidates. Maximal degree in co-relation 3411. Up to 1030 conditions per place. [2024-06-14 14:08:27,666 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 52 selfloop transitions, 12 changer transitions 0/74 dead transitions. [2024-06-14 14:08:27,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 74 transitions, 380 flow [2024-06-14 14:08:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 166 transitions. [2024-06-14 14:08:27,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6287878787878788 [2024-06-14 14:08:27,668 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 168 flow. Second operand 6 states and 166 transitions. [2024-06-14 14:08:27,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 74 transitions, 380 flow [2024-06-14 14:08:27,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 74 transitions, 364 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 14:08:27,670 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 211 flow [2024-06-14 14:08:27,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=211, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2024-06-14 14:08:27,671 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-14 14:08:27,671 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 211 flow [2024-06-14 14:08:27,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:27,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:27,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:27,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 14:08:27,672 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:27,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:27,672 INFO L85 PathProgramCache]: Analyzing trace with hash -915401911, now seen corresponding path program 1 times [2024-06-14 14:08:27,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:27,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787285940] [2024-06-14 14:08:27,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:27,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:27,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:28,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:28,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:28,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787285940] [2024-06-14 14:08:28,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787285940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:28,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:28,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:08:28,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735852747] [2024-06-14 14:08:28,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:28,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:08:28,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:28,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:08:28,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:08:28,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:28,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:28,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:28,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:28,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:28,287 INFO L124 PetriNetUnfolderBase]: 725/1301 cut-off events. [2024-06-14 14:08:28,288 INFO L125 PetriNetUnfolderBase]: For 1865/1915 co-relation queries the response was YES. [2024-06-14 14:08:28,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3811 conditions, 1301 events. 725/1301 cut-off events. For 1865/1915 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7120 event pairs, 270 based on Foata normal form. 4/1268 useless extension candidates. Maximal degree in co-relation 3791. Up to 1062 conditions per place. [2024-06-14 14:08:28,296 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 49 selfloop transitions, 15 changer transitions 0/74 dead transitions. [2024-06-14 14:08:28,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 74 transitions, 441 flow [2024-06-14 14:08:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:08:28,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:08:28,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-06-14 14:08:28,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6454545454545455 [2024-06-14 14:08:28,298 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 211 flow. Second operand 5 states and 142 transitions. [2024-06-14 14:08:28,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 74 transitions, 441 flow [2024-06-14 14:08:28,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 74 transitions, 412 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:28,306 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 262 flow [2024-06-14 14:08:28,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=262, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-14 14:08:28,309 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 11 predicate places. [2024-06-14 14:08:28,309 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 262 flow [2024-06-14 14:08:28,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:28,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:28,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:28,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 14:08:28,310 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:28,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:28,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1021213863, now seen corresponding path program 2 times [2024-06-14 14:08:28,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:28,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791354411] [2024-06-14 14:08:28,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:28,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:28,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:28,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:28,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:28,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791354411] [2024-06-14 14:08:28,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791354411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:28,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:28,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:08:28,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745500134] [2024-06-14 14:08:28,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:28,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:08:28,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:28,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:08:28,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:08:28,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:28,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:28,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:28,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:28,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:28,885 INFO L124 PetriNetUnfolderBase]: 720/1291 cut-off events. [2024-06-14 14:08:28,886 INFO L125 PetriNetUnfolderBase]: For 2770/2841 co-relation queries the response was YES. [2024-06-14 14:08:28,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4065 conditions, 1291 events. 720/1291 cut-off events. For 2770/2841 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7020 event pairs, 279 based on Foata normal form. 24/1277 useless extension candidates. Maximal degree in co-relation 4044. Up to 1057 conditions per place. [2024-06-14 14:08:28,917 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 44 selfloop transitions, 15 changer transitions 0/69 dead transitions. [2024-06-14 14:08:28,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 418 flow [2024-06-14 14:08:28,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:08:28,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:08:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 14:08:28,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-06-14 14:08:28,919 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 262 flow. Second operand 5 states and 137 transitions. [2024-06-14 14:08:28,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 418 flow [2024-06-14 14:08:28,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 390 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-14 14:08:28,922 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 272 flow [2024-06-14 14:08:28,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-06-14 14:08:28,923 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2024-06-14 14:08:28,923 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 272 flow [2024-06-14 14:08:28,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:28,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:28,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:28,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 14:08:28,924 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:28,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:28,924 INFO L85 PathProgramCache]: Analyzing trace with hash -652497224, now seen corresponding path program 1 times [2024-06-14 14:08:28,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:28,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422805194] [2024-06-14 14:08:28,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:28,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:29,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:29,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422805194] [2024-06-14 14:08:29,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422805194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:29,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:29,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 14:08:29,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339525244] [2024-06-14 14:08:29,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:29,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 14:08:29,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:29,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 14:08:29,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 14:08:29,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 44 [2024-06-14 14:08:29,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 272 flow. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:29,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:29,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 44 [2024-06-14 14:08:29,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:29,456 INFO L124 PetriNetUnfolderBase]: 700/1350 cut-off events. [2024-06-14 14:08:29,456 INFO L125 PetriNetUnfolderBase]: For 2993/2993 co-relation queries the response was YES. [2024-06-14 14:08:29,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4152 conditions, 1350 events. 700/1350 cut-off events. For 2993/2993 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7586 event pairs, 288 based on Foata normal form. 1/1331 useless extension candidates. Maximal degree in co-relation 4129. Up to 1056 conditions per place. [2024-06-14 14:08:29,468 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 44 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-06-14 14:08:29,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 410 flow [2024-06-14 14:08:29,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 14:08:29,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 14:08:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-14 14:08:29,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-14 14:08:29,470 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 272 flow. Second operand 4 states and 110 transitions. [2024-06-14 14:08:29,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 410 flow [2024-06-14 14:08:29,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 368 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:29,476 INFO L231 Difference]: Finished difference. Result has 59 places, 57 transitions, 272 flow [2024-06-14 14:08:29,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=59, PETRI_TRANSITIONS=57} [2024-06-14 14:08:29,476 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-14 14:08:29,477 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 57 transitions, 272 flow [2024-06-14 14:08:29,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 4 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:29,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:29,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:29,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 14:08:29,477 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:29,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:29,478 INFO L85 PathProgramCache]: Analyzing trace with hash 766893258, now seen corresponding path program 1 times [2024-06-14 14:08:29,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:29,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418530639] [2024-06-14 14:08:29,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:29,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:29,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:29,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418530639] [2024-06-14 14:08:29,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418530639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:29,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:29,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:29,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960936562] [2024-06-14 14:08:29,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:29,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:29,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:29,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:29,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:30,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:30,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 57 transitions, 272 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:30,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:30,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:30,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:30,188 INFO L124 PetriNetUnfolderBase]: 725/1295 cut-off events. [2024-06-14 14:08:30,188 INFO L125 PetriNetUnfolderBase]: For 3852/3936 co-relation queries the response was YES. [2024-06-14 14:08:30,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4374 conditions, 1295 events. 725/1295 cut-off events. For 3852/3936 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 7051 event pairs, 255 based on Foata normal form. 12/1287 useless extension candidates. Maximal degree in co-relation 4351. Up to 1059 conditions per place. [2024-06-14 14:08:30,195 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 53 selfloop transitions, 15 changer transitions 0/78 dead transitions. [2024-06-14 14:08:30,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 78 transitions, 476 flow [2024-06-14 14:08:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:08:30,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:08:30,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-14 14:08:30,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-14 14:08:30,197 INFO L175 Difference]: Start difference. First operand has 59 places, 57 transitions, 272 flow. Second operand 5 states and 140 transitions. [2024-06-14 14:08:30,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 78 transitions, 476 flow [2024-06-14 14:08:30,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 456 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-14 14:08:30,201 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 322 flow [2024-06-14 14:08:30,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=322, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-14 14:08:30,202 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 17 predicate places. [2024-06-14 14:08:30,202 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 322 flow [2024-06-14 14:08:30,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:30,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:30,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:30,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 14:08:30,203 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:30,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:30,203 INFO L85 PathProgramCache]: Analyzing trace with hash -947691904, now seen corresponding path program 2 times [2024-06-14 14:08:30,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:30,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687771883] [2024-06-14 14:08:30,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:30,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:30,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:30,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:30,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687771883] [2024-06-14 14:08:30,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687771883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:30,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:30,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:30,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246741399] [2024-06-14 14:08:30,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:30,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:30,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:30,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:30,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:30,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:30,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 322 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:30,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:30,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:30,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:30,780 INFO L124 PetriNetUnfolderBase]: 736/1315 cut-off events. [2024-06-14 14:08:30,781 INFO L125 PetriNetUnfolderBase]: For 4914/5024 co-relation queries the response was YES. [2024-06-14 14:08:30,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4785 conditions, 1315 events. 736/1315 cut-off events. For 4914/5024 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 7200 event pairs, 253 based on Foata normal form. 32/1328 useless extension candidates. Maximal degree in co-relation 4761. Up to 1037 conditions per place. [2024-06-14 14:08:30,789 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 64 selfloop transitions, 27 changer transitions 0/101 dead transitions. [2024-06-14 14:08:30,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 678 flow [2024-06-14 14:08:30,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-14 14:08:30,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193181818181818 [2024-06-14 14:08:30,791 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 322 flow. Second operand 8 states and 218 transitions. [2024-06-14 14:08:30,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 678 flow [2024-06-14 14:08:30,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 101 transitions, 632 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:30,798 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 404 flow [2024-06-14 14:08:30,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=404, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-14 14:08:30,799 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-14 14:08:30,799 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 404 flow [2024-06-14 14:08:30,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:30,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:30,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:30,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 14:08:30,800 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:30,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:30,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1856238190, now seen corresponding path program 3 times [2024-06-14 14:08:30,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:30,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892917835] [2024-06-14 14:08:30,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:30,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:31,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:31,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892917835] [2024-06-14 14:08:31,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892917835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:31,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:31,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:31,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425644291] [2024-06-14 14:08:31,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:31,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:31,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:31,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:31,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:31,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:31,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 404 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:31,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:31,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:31,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:31,412 INFO L124 PetriNetUnfolderBase]: 731/1304 cut-off events. [2024-06-14 14:08:31,412 INFO L125 PetriNetUnfolderBase]: For 5630/5756 co-relation queries the response was YES. [2024-06-14 14:08:31,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4951 conditions, 1304 events. 731/1304 cut-off events. For 5630/5756 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 7052 event pairs, 262 based on Foata normal form. 42/1327 useless extension candidates. Maximal degree in co-relation 4927. Up to 1032 conditions per place. [2024-06-14 14:08:31,420 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 59 selfloop transitions, 27 changer transitions 0/96 dead transitions. [2024-06-14 14:08:31,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 652 flow [2024-06-14 14:08:31,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-14 14:08:31,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-14 14:08:31,422 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 404 flow. Second operand 8 states and 212 transitions. [2024-06-14 14:08:31,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 652 flow [2024-06-14 14:08:31,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 582 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:31,429 INFO L231 Difference]: Finished difference. Result has 70 places, 66 transitions, 396 flow [2024-06-14 14:08:31,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=396, PETRI_PLACES=70, PETRI_TRANSITIONS=66} [2024-06-14 14:08:31,429 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2024-06-14 14:08:31,429 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 66 transitions, 396 flow [2024-06-14 14:08:31,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:31,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:31,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:31,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 14:08:31,430 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:31,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:31,430 INFO L85 PathProgramCache]: Analyzing trace with hash 215462156, now seen corresponding path program 1 times [2024-06-14 14:08:31,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:31,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348325783] [2024-06-14 14:08:31,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:31,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:31,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:31,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348325783] [2024-06-14 14:08:31,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348325783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:31,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:31,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:31,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917867950] [2024-06-14 14:08:31,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:31,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:31,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:31,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:31,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:31,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:31,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 66 transitions, 396 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:31,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:31,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:31,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:32,021 INFO L124 PetriNetUnfolderBase]: 780/1450 cut-off events. [2024-06-14 14:08:32,021 INFO L125 PetriNetUnfolderBase]: For 6060/6090 co-relation queries the response was YES. [2024-06-14 14:08:32,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5331 conditions, 1450 events. 780/1450 cut-off events. For 6060/6090 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 7977 event pairs, 256 based on Foata normal form. 4/1430 useless extension candidates. Maximal degree in co-relation 5305. Up to 1155 conditions per place. [2024-06-14 14:08:32,032 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 69 selfloop transitions, 12 changer transitions 0/91 dead transitions. [2024-06-14 14:08:32,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 650 flow [2024-06-14 14:08:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:32,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:32,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-14 14:08:32,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-14 14:08:32,034 INFO L175 Difference]: Start difference. First operand has 70 places, 66 transitions, 396 flow. Second operand 6 states and 159 transitions. [2024-06-14 14:08:32,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 650 flow [2024-06-14 14:08:32,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 91 transitions, 584 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:32,040 INFO L231 Difference]: Finished difference. Result has 70 places, 71 transitions, 413 flow [2024-06-14 14:08:32,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=413, PETRI_PLACES=70, PETRI_TRANSITIONS=71} [2024-06-14 14:08:32,041 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 25 predicate places. [2024-06-14 14:08:32,041 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 71 transitions, 413 flow [2024-06-14 14:08:32,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:32,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:32,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:32,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 14:08:32,042 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:32,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:32,042 INFO L85 PathProgramCache]: Analyzing trace with hash 2091287, now seen corresponding path program 1 times [2024-06-14 14:08:32,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:32,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994337588] [2024-06-14 14:08:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:32,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:32,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:32,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994337588] [2024-06-14 14:08:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994337588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:32,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:32,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:08:32,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521303146] [2024-06-14 14:08:32,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:32,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:08:32,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:32,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:08:32,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:08:32,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:32,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 71 transitions, 413 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:32,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:32,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:32,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:32,645 INFO L124 PetriNetUnfolderBase]: 863/1543 cut-off events. [2024-06-14 14:08:32,645 INFO L125 PetriNetUnfolderBase]: For 8535/8543 co-relation queries the response was YES. [2024-06-14 14:08:32,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6073 conditions, 1543 events. 863/1543 cut-off events. For 8535/8543 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8384 event pairs, 332 based on Foata normal form. 6/1535 useless extension candidates. Maximal degree in co-relation 6045. Up to 1273 conditions per place. [2024-06-14 14:08:32,654 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 66 selfloop transitions, 17 changer transitions 0/96 dead transitions. [2024-06-14 14:08:32,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 689 flow [2024-06-14 14:08:32,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:08:32,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:08:32,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 14:08:32,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6227272727272727 [2024-06-14 14:08:32,655 INFO L175 Difference]: Start difference. First operand has 70 places, 71 transitions, 413 flow. Second operand 5 states and 137 transitions. [2024-06-14 14:08:32,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 689 flow [2024-06-14 14:08:32,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 96 transitions, 650 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:32,661 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 481 flow [2024-06-14 14:08:32,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=374, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=481, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2024-06-14 14:08:32,662 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-14 14:08:32,662 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 481 flow [2024-06-14 14:08:32,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:32,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:32,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:32,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 14:08:32,663 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:32,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:32,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1046528717, now seen corresponding path program 2 times [2024-06-14 14:08:32,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:32,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296673480] [2024-06-14 14:08:32,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:32,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:33,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:33,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:33,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296673480] [2024-06-14 14:08:33,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296673480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:33,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:33,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:08:33,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453145417] [2024-06-14 14:08:33,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:33,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:08:33,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:33,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:08:33,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:08:33,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:33,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 481 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:33,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:33,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:33,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:33,205 INFO L124 PetriNetUnfolderBase]: 860/1521 cut-off events. [2024-06-14 14:08:33,205 INFO L125 PetriNetUnfolderBase]: For 9933/9937 co-relation queries the response was YES. [2024-06-14 14:08:33,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 1521 events. 860/1521 cut-off events. For 9933/9937 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8241 event pairs, 338 based on Foata normal form. 5/1507 useless extension candidates. Maximal degree in co-relation 6270. Up to 1270 conditions per place. [2024-06-14 14:08:33,217 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 59 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2024-06-14 14:08:33,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 89 transitions, 655 flow [2024-06-14 14:08:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:08:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:08:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 14:08:33,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:08:33,219 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 481 flow. Second operand 5 states and 130 transitions. [2024-06-14 14:08:33,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 89 transitions, 655 flow [2024-06-14 14:08:33,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 89 transitions, 633 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-14 14:08:33,228 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 499 flow [2024-06-14 14:08:33,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=499, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-14 14:08:33,229 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-14 14:08:33,229 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 499 flow [2024-06-14 14:08:33,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:33,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:33,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:33,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 14:08:33,230 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:33,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:33,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1038514411, now seen corresponding path program 1 times [2024-06-14 14:08:33,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:33,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012288656] [2024-06-14 14:08:33,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:33,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:33,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:33,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012288656] [2024-06-14 14:08:33,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012288656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:33,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:33,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:08:33,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419107433] [2024-06-14 14:08:33,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:33,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:08:33,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:33,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:08:33,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:08:33,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:33,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 499 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:33,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:33,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:33,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:33,805 INFO L124 PetriNetUnfolderBase]: 838/1535 cut-off events. [2024-06-14 14:08:33,805 INFO L125 PetriNetUnfolderBase]: For 9236/9308 co-relation queries the response was YES. [2024-06-14 14:08:33,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6183 conditions, 1535 events. 838/1535 cut-off events. For 9236/9308 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8575 event pairs, 265 based on Foata normal form. 1/1501 useless extension candidates. Maximal degree in co-relation 6150. Up to 1242 conditions per place. [2024-06-14 14:08:33,814 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 69 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-14 14:08:33,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 763 flow [2024-06-14 14:08:33,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:08:33,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:08:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-14 14:08:33,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6090909090909091 [2024-06-14 14:08:33,815 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 499 flow. Second operand 5 states and 134 transitions. [2024-06-14 14:08:33,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 763 flow [2024-06-14 14:08:33,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 99 transitions, 726 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:33,826 INFO L231 Difference]: Finished difference. Result has 80 places, 86 transitions, 544 flow [2024-06-14 14:08:33,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=544, PETRI_PLACES=80, PETRI_TRANSITIONS=86} [2024-06-14 14:08:33,827 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-14 14:08:33,827 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 86 transitions, 544 flow [2024-06-14 14:08:33,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:33,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:33,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:33,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 14:08:33,828 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:33,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:33,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1242748531, now seen corresponding path program 2 times [2024-06-14 14:08:33,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:33,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377432699] [2024-06-14 14:08:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:33,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:33,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:34,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:34,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377432699] [2024-06-14 14:08:34,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377432699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:34,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:34,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 14:08:34,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019979213] [2024-06-14 14:08:34,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:34,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 14:08:34,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:34,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 14:08:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 14:08:34,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:34,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 86 transitions, 544 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:34,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:34,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:34,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:34,431 INFO L124 PetriNetUnfolderBase]: 835/1531 cut-off events. [2024-06-14 14:08:34,432 INFO L125 PetriNetUnfolderBase]: For 10506/10576 co-relation queries the response was YES. [2024-06-14 14:08:34,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6437 conditions, 1531 events. 835/1531 cut-off events. For 10506/10576 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 8614 event pairs, 268 based on Foata normal form. 1/1499 useless extension candidates. Maximal degree in co-relation 6403. Up to 1239 conditions per place. [2024-06-14 14:08:34,443 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 65 selfloop transitions, 17 changer transitions 0/95 dead transitions. [2024-06-14 14:08:34,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 95 transitions, 730 flow [2024-06-14 14:08:34,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 14:08:34,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 14:08:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-14 14:08:34,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:08:34,444 INFO L175 Difference]: Start difference. First operand has 80 places, 86 transitions, 544 flow. Second operand 5 states and 130 transitions. [2024-06-14 14:08:34,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 95 transitions, 730 flow [2024-06-14 14:08:34,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 95 transitions, 700 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-14 14:08:34,456 INFO L231 Difference]: Finished difference. Result has 84 places, 86 transitions, 555 flow [2024-06-14 14:08:34,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=84, PETRI_TRANSITIONS=86} [2024-06-14 14:08:34,458 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-06-14 14:08:34,458 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 86 transitions, 555 flow [2024-06-14 14:08:34,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:34,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:34,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:34,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 14:08:34,459 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:34,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:34,459 INFO L85 PathProgramCache]: Analyzing trace with hash -771408469, now seen corresponding path program 1 times [2024-06-14 14:08:34,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:34,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867960669] [2024-06-14 14:08:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:34,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:34,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:34,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867960669] [2024-06-14 14:08:34,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867960669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:34,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:34,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:34,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954987679] [2024-06-14 14:08:34,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:34,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:34,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:34,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:34,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:34,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:34,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 86 transitions, 555 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:34,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:34,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:34,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:35,215 INFO L124 PetriNetUnfolderBase]: 1005/1775 cut-off events. [2024-06-14 14:08:35,215 INFO L125 PetriNetUnfolderBase]: For 16637/16822 co-relation queries the response was YES. [2024-06-14 14:08:35,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8026 conditions, 1775 events. 1005/1775 cut-off events. For 16637/16822 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10093 event pairs, 241 based on Foata normal form. 36/1774 useless extension candidates. Maximal degree in co-relation 7990. Up to 1237 conditions per place. [2024-06-14 14:08:35,227 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 91 selfloop transitions, 20 changer transitions 0/124 dead transitions. [2024-06-14 14:08:35,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 124 transitions, 971 flow [2024-06-14 14:08:35,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:35,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-14 14:08:35,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6331168831168831 [2024-06-14 14:08:35,229 INFO L175 Difference]: Start difference. First operand has 84 places, 86 transitions, 555 flow. Second operand 7 states and 195 transitions. [2024-06-14 14:08:35,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 124 transitions, 971 flow [2024-06-14 14:08:35,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 124 transitions, 925 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:35,245 INFO L231 Difference]: Finished difference. Result has 87 places, 89 transitions, 607 flow [2024-06-14 14:08:35,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=607, PETRI_PLACES=87, PETRI_TRANSITIONS=89} [2024-06-14 14:08:35,245 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-14 14:08:35,246 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 89 transitions, 607 flow [2024-06-14 14:08:35,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:35,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:35,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:35,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 14:08:35,246 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:35,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:35,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1862964695, now seen corresponding path program 2 times [2024-06-14 14:08:35,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:35,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866256953] [2024-06-14 14:08:35,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:35,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:35,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:35,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866256953] [2024-06-14 14:08:35,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866256953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:35,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:35,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:35,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667573873] [2024-06-14 14:08:35,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:35,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:35,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:35,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:35,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:35,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:35,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 89 transitions, 607 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:35,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:35,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:35,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:35,950 INFO L124 PetriNetUnfolderBase]: 969/1727 cut-off events. [2024-06-14 14:08:35,951 INFO L125 PetriNetUnfolderBase]: For 17857/18022 co-relation queries the response was YES. [2024-06-14 14:08:35,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7892 conditions, 1727 events. 969/1727 cut-off events. For 17857/18022 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9802 event pairs, 296 based on Foata normal form. 44/1732 useless extension candidates. Maximal degree in co-relation 7855. Up to 1322 conditions per place. [2024-06-14 14:08:35,962 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 85 selfloop transitions, 17 changer transitions 0/115 dead transitions. [2024-06-14 14:08:35,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 115 transitions, 891 flow [2024-06-14 14:08:35,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:35,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-14 14:08:35,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6325757575757576 [2024-06-14 14:08:35,964 INFO L175 Difference]: Start difference. First operand has 87 places, 89 transitions, 607 flow. Second operand 6 states and 167 transitions. [2024-06-14 14:08:35,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 115 transitions, 891 flow [2024-06-14 14:08:35,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 115 transitions, 861 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:35,980 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 620 flow [2024-06-14 14:08:35,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=620, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2024-06-14 14:08:35,980 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 45 predicate places. [2024-06-14 14:08:35,981 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 620 flow [2024-06-14 14:08:35,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:35,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:35,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:35,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 14:08:35,981 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:35,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:35,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1744877015, now seen corresponding path program 3 times [2024-06-14 14:08:35,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:35,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508530873] [2024-06-14 14:08:35,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:35,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:36,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:36,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508530873] [2024-06-14 14:08:36,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508530873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:36,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:36,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:36,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437671193] [2024-06-14 14:08:36,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:36,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:36,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:36,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:36,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:36,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:36,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 620 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:36,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:36,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:36,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:36,643 INFO L124 PetriNetUnfolderBase]: 1027/1824 cut-off events. [2024-06-14 14:08:36,643 INFO L125 PetriNetUnfolderBase]: For 19924/20089 co-relation queries the response was YES. [2024-06-14 14:08:36,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8446 conditions, 1824 events. 1027/1824 cut-off events. For 19924/20089 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10582 event pairs, 315 based on Foata normal form. 54/1830 useless extension candidates. Maximal degree in co-relation 8407. Up to 1397 conditions per place. [2024-06-14 14:08:36,656 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 88 selfloop transitions, 30 changer transitions 0/131 dead transitions. [2024-06-14 14:08:36,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 131 transitions, 994 flow [2024-06-14 14:08:36,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:36,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-14 14:08:36,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-14 14:08:36,658 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 620 flow. Second operand 9 states and 242 transitions. [2024-06-14 14:08:36,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 131 transitions, 994 flow [2024-06-14 14:08:36,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 131 transitions, 955 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:36,677 INFO L231 Difference]: Finished difference. Result has 94 places, 90 transitions, 670 flow [2024-06-14 14:08:36,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=670, PETRI_PLACES=94, PETRI_TRANSITIONS=90} [2024-06-14 14:08:36,678 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-14 14:08:36,678 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 90 transitions, 670 flow [2024-06-14 14:08:36,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:36,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:36,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:36,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 14:08:36,679 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:36,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:36,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2043042281, now seen corresponding path program 4 times [2024-06-14 14:08:36,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:36,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803152645] [2024-06-14 14:08:36,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:36,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:37,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:37,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803152645] [2024-06-14 14:08:37,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803152645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:37,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:37,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:08:37,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077771049] [2024-06-14 14:08:37,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:37,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:08:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:37,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:08:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:08:37,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:37,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 90 transitions, 670 flow. Second operand has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:37,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:37,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:37,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:37,394 INFO L124 PetriNetUnfolderBase]: 1060/1889 cut-off events. [2024-06-14 14:08:37,394 INFO L125 PetriNetUnfolderBase]: For 22163/22328 co-relation queries the response was YES. [2024-06-14 14:08:37,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8829 conditions, 1889 events. 1060/1889 cut-off events. For 22163/22328 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 10986 event pairs, 326 based on Foata normal form. 54/1899 useless extension candidates. Maximal degree in co-relation 8789. Up to 1456 conditions per place. [2024-06-14 14:08:37,409 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 86 selfloop transitions, 30 changer transitions 0/129 dead transitions. [2024-06-14 14:08:37,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 129 transitions, 1034 flow [2024-06-14 14:08:37,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-14 14:08:37,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.601010101010101 [2024-06-14 14:08:37,410 INFO L175 Difference]: Start difference. First operand has 94 places, 90 transitions, 670 flow. Second operand 9 states and 238 transitions. [2024-06-14 14:08:37,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 129 transitions, 1034 flow [2024-06-14 14:08:37,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 129 transitions, 969 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:37,430 INFO L231 Difference]: Finished difference. Result has 96 places, 91 transitions, 696 flow [2024-06-14 14:08:37,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=696, PETRI_PLACES=96, PETRI_TRANSITIONS=91} [2024-06-14 14:08:37,430 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-14 14:08:37,431 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 91 transitions, 696 flow [2024-06-14 14:08:37,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.625) internal successors, (149), 8 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:37,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:37,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:37,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 14:08:37,431 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:37,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:37,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1243554795, now seen corresponding path program 1 times [2024-06-14 14:08:37,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:37,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713620502] [2024-06-14 14:08:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:37,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:37,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:37,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713620502] [2024-06-14 14:08:37,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713620502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:37,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:37,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:37,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61276697] [2024-06-14 14:08:37,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:37,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:37,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:37,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:37,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:37,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 91 transitions, 696 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:37,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:37,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:37,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:38,032 INFO L124 PetriNetUnfolderBase]: 1233/2120 cut-off events. [2024-06-14 14:08:38,032 INFO L125 PetriNetUnfolderBase]: For 23695/23695 co-relation queries the response was YES. [2024-06-14 14:08:38,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9826 conditions, 2120 events. 1233/2120 cut-off events. For 23695/23695 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11979 event pairs, 363 based on Foata normal form. 4/2119 useless extension candidates. Maximal degree in co-relation 9785. Up to 1813 conditions per place. [2024-06-14 14:08:38,046 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 90 selfloop transitions, 23 changer transitions 0/122 dead transitions. [2024-06-14 14:08:38,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 122 transitions, 1045 flow [2024-06-14 14:08:38,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:38,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:38,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:08:38,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-14 14:08:38,048 INFO L175 Difference]: Start difference. First operand has 96 places, 91 transitions, 696 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:08:38,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 122 transitions, 1045 flow [2024-06-14 14:08:38,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 122 transitions, 972 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:38,069 INFO L231 Difference]: Finished difference. Result has 97 places, 97 transitions, 747 flow [2024-06-14 14:08:38,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=629, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=747, PETRI_PLACES=97, PETRI_TRANSITIONS=97} [2024-06-14 14:08:38,070 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-14 14:08:38,070 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 97 transitions, 747 flow [2024-06-14 14:08:38,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:38,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:38,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:38,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 14:08:38,070 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)] === [2024-06-14 14:08:38,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:38,071 INFO L85 PathProgramCache]: Analyzing trace with hash 890235883, now seen corresponding path program 2 times [2024-06-14 14:08:38,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:38,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242320907] [2024-06-14 14:08:38,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:38,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:38,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:38,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:38,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242320907] [2024-06-14 14:08:38,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242320907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:38,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:38,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:38,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504288042] [2024-06-14 14:08:38,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:38,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:38,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:38,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:38,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:38,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:38,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 97 transitions, 747 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:38,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:38,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:38,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:38,681 INFO L124 PetriNetUnfolderBase]: 1250/2175 cut-off events. [2024-06-14 14:08:38,681 INFO L125 PetriNetUnfolderBase]: For 25682/25682 co-relation queries the response was YES. [2024-06-14 14:08:38,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10195 conditions, 2175 events. 1250/2175 cut-off events. For 25682/25682 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12459 event pairs, 370 based on Foata normal form. 4/2174 useless extension candidates. Maximal degree in co-relation 10152. Up to 1840 conditions per place. [2024-06-14 14:08:38,695 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 91 selfloop transitions, 28 changer transitions 0/128 dead transitions. [2024-06-14 14:08:38,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 128 transitions, 1123 flow [2024-06-14 14:08:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:38,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:38,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 14:08:38,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-14 14:08:38,697 INFO L175 Difference]: Start difference. First operand has 97 places, 97 transitions, 747 flow. Second operand 7 states and 180 transitions. [2024-06-14 14:08:38,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 128 transitions, 1123 flow [2024-06-14 14:08:38,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 128 transitions, 1046 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:38,720 INFO L231 Difference]: Finished difference. Result has 101 places, 104 transitions, 827 flow [2024-06-14 14:08:38,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=827, PETRI_PLACES=101, PETRI_TRANSITIONS=104} [2024-06-14 14:08:38,721 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-14 14:08:38,721 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 104 transitions, 827 flow [2024-06-14 14:08:38,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:38,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:38,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:38,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 14:08:38,722 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:38,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:38,722 INFO L85 PathProgramCache]: Analyzing trace with hash 900711403, now seen corresponding path program 3 times [2024-06-14 14:08:38,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:38,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152632351] [2024-06-14 14:08:38,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:38,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:39,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:39,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152632351] [2024-06-14 14:08:39,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152632351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:39,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:39,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:08:39,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888321585] [2024-06-14 14:08:39,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:39,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:08:39,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:39,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:08:39,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:08:39,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:39,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 104 transitions, 827 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:39,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:39,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:39,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:39,331 INFO L124 PetriNetUnfolderBase]: 1242/2163 cut-off events. [2024-06-14 14:08:39,331 INFO L125 PetriNetUnfolderBase]: For 27638/27638 co-relation queries the response was YES. [2024-06-14 14:08:39,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10370 conditions, 2163 events. 1242/2163 cut-off events. For 27638/27638 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12404 event pairs, 318 based on Foata normal form. 4/2162 useless extension candidates. Maximal degree in co-relation 10325. Up to 1751 conditions per place. [2024-06-14 14:08:39,345 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 88 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-06-14 14:08:39,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 132 transitions, 1189 flow [2024-06-14 14:08:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:08:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:08:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:08:39,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-14 14:08:39,346 INFO L175 Difference]: Start difference. First operand has 101 places, 104 transitions, 827 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:08:39,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 132 transitions, 1189 flow [2024-06-14 14:08:39,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 132 transitions, 1132 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 14:08:39,373 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 919 flow [2024-06-14 14:08:39,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=919, PETRI_PLACES=107, PETRI_TRANSITIONS=107} [2024-06-14 14:08:39,374 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2024-06-14 14:08:39,374 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 919 flow [2024-06-14 14:08:39,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:39,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:39,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:39,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 14:08:39,374 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:39,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:39,375 INFO L85 PathProgramCache]: Analyzing trace with hash 843586010, now seen corresponding path program 1 times [2024-06-14 14:08:39,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:39,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202257435] [2024-06-14 14:08:39,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:39,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:39,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:39,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:39,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202257435] [2024-06-14 14:08:39,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202257435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:39,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:39,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:39,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173069118] [2024-06-14 14:08:39,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:39,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:39,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:39,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:39,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:39,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:39,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 107 transitions, 919 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:39,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:39,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:39,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:40,038 INFO L124 PetriNetUnfolderBase]: 1255/2185 cut-off events. [2024-06-14 14:08:40,038 INFO L125 PetriNetUnfolderBase]: For 30178/30178 co-relation queries the response was YES. [2024-06-14 14:08:40,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10761 conditions, 2185 events. 1255/2185 cut-off events. For 30178/30178 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12523 event pairs, 367 based on Foata normal form. 1/2180 useless extension candidates. Maximal degree in co-relation 10714. Up to 1868 conditions per place. [2024-06-14 14:08:40,054 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 106 selfloop transitions, 31 changer transitions 0/146 dead transitions. [2024-06-14 14:08:40,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 146 transitions, 1447 flow [2024-06-14 14:08:40,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:40,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 14:08:40,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-14 14:08:40,055 INFO L175 Difference]: Start difference. First operand has 107 places, 107 transitions, 919 flow. Second operand 6 states and 160 transitions. [2024-06-14 14:08:40,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 146 transitions, 1447 flow [2024-06-14 14:08:40,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 146 transitions, 1346 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:40,087 INFO L231 Difference]: Finished difference. Result has 111 places, 125 transitions, 1053 flow [2024-06-14 14:08:40,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1053, PETRI_PLACES=111, PETRI_TRANSITIONS=125} [2024-06-14 14:08:40,088 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-14 14:08:40,088 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 125 transitions, 1053 flow [2024-06-14 14:08:40,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:40,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:40,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:40,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 14:08:40,089 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:40,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:40,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2009764566, now seen corresponding path program 2 times [2024-06-14 14:08:40,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:40,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752416415] [2024-06-14 14:08:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:40,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:40,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:40,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752416415] [2024-06-14 14:08:40,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752416415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:40,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:40,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:40,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961005558] [2024-06-14 14:08:40,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:40,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:40,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:40,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:40,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:40,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:40,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 125 transitions, 1053 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:40,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:40,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:40,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:40,761 INFO L124 PetriNetUnfolderBase]: 1268/2207 cut-off events. [2024-06-14 14:08:40,761 INFO L125 PetriNetUnfolderBase]: For 33066/33066 co-relation queries the response was YES. [2024-06-14 14:08:40,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11163 conditions, 2207 events. 1268/2207 cut-off events. For 33066/33066 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12655 event pairs, 367 based on Foata normal form. 1/2202 useless extension candidates. Maximal degree in co-relation 11113. Up to 1883 conditions per place. [2024-06-14 14:08:40,774 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 103 selfloop transitions, 37 changer transitions 0/149 dead transitions. [2024-06-14 14:08:40,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 149 transitions, 1528 flow [2024-06-14 14:08:40,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:40,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 14:08:40,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-14 14:08:40,776 INFO L175 Difference]: Start difference. First operand has 111 places, 125 transitions, 1053 flow. Second operand 6 states and 157 transitions. [2024-06-14 14:08:40,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 149 transitions, 1528 flow [2024-06-14 14:08:40,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 149 transitions, 1480 flow, removed 24 selfloop flow, removed 0 redundant places. [2024-06-14 14:08:40,811 INFO L231 Difference]: Finished difference. Result has 117 places, 131 transitions, 1148 flow [2024-06-14 14:08:40,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1148, PETRI_PLACES=117, PETRI_TRANSITIONS=131} [2024-06-14 14:08:40,811 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 72 predicate places. [2024-06-14 14:08:40,811 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 131 transitions, 1148 flow [2024-06-14 14:08:40,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:40,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:40,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:40,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 14:08:40,812 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:40,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:40,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1894771334, now seen corresponding path program 1 times [2024-06-14 14:08:40,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:40,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793099229] [2024-06-14 14:08:40,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:40,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:41,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:41,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793099229] [2024-06-14 14:08:41,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793099229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:41,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:41,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:41,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723084797] [2024-06-14 14:08:41,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:41,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:41,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:41,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:41,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:41,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:41,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 131 transitions, 1148 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:41,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:41,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:41,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:41,506 INFO L124 PetriNetUnfolderBase]: 1214/2164 cut-off events. [2024-06-14 14:08:41,506 INFO L125 PetriNetUnfolderBase]: For 35977/35977 co-relation queries the response was YES. [2024-06-14 14:08:41,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10964 conditions, 2164 events. 1214/2164 cut-off events. For 35977/35977 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12735 event pairs, 356 based on Foata normal form. 2/2153 useless extension candidates. Maximal degree in co-relation 10911. Up to 1754 conditions per place. [2024-06-14 14:08:41,522 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 102 selfloop transitions, 27 changer transitions 0/154 dead transitions. [2024-06-14 14:08:41,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 154 transitions, 1550 flow [2024-06-14 14:08:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 14:08:41,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-06-14 14:08:41,524 INFO L175 Difference]: Start difference. First operand has 117 places, 131 transitions, 1148 flow. Second operand 6 states and 160 transitions. [2024-06-14 14:08:41,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 154 transitions, 1550 flow [2024-06-14 14:08:41,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 154 transitions, 1495 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 14:08:41,566 INFO L231 Difference]: Finished difference. Result has 121 places, 137 transitions, 1216 flow [2024-06-14 14:08:41,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1216, PETRI_PLACES=121, PETRI_TRANSITIONS=137} [2024-06-14 14:08:41,567 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-14 14:08:41,567 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 137 transitions, 1216 flow [2024-06-14 14:08:41,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:41,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:41,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:41,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 14:08:41,568 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:41,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:41,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1948925420, now seen corresponding path program 3 times [2024-06-14 14:08:41,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:41,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411433379] [2024-06-14 14:08:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:41,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:41,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:41,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:41,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411433379] [2024-06-14 14:08:41,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411433379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:41,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:41,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:41,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878114580] [2024-06-14 14:08:41,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:41,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:41,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:41,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:41,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:41,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:41,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 137 transitions, 1216 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:41,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:41,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:41,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:42,186 INFO L124 PetriNetUnfolderBase]: 1275/2219 cut-off events. [2024-06-14 14:08:42,186 INFO L125 PetriNetUnfolderBase]: For 38077/38077 co-relation queries the response was YES. [2024-06-14 14:08:42,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11548 conditions, 2219 events. 1275/2219 cut-off events. For 38077/38077 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12750 event pairs, 369 based on Foata normal form. 1/2213 useless extension candidates. Maximal degree in co-relation 11494. Up to 1894 conditions per place. [2024-06-14 14:08:42,199 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 109 selfloop transitions, 39 changer transitions 0/157 dead transitions. [2024-06-14 14:08:42,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 157 transitions, 1678 flow [2024-06-14 14:08:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 14:08:42,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-14 14:08:42,201 INFO L175 Difference]: Start difference. First operand has 121 places, 137 transitions, 1216 flow. Second operand 6 states and 157 transitions. [2024-06-14 14:08:42,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 157 transitions, 1678 flow [2024-06-14 14:08:42,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 157 transitions, 1627 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 14:08:42,238 INFO L231 Difference]: Finished difference. Result has 125 places, 139 transitions, 1275 flow [2024-06-14 14:08:42,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1171, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1275, PETRI_PLACES=125, PETRI_TRANSITIONS=139} [2024-06-14 14:08:42,239 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 80 predicate places. [2024-06-14 14:08:42,239 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 139 transitions, 1275 flow [2024-06-14 14:08:42,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:42,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:42,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:42,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 14:08:42,240 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:42,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:42,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1962257900, now seen corresponding path program 4 times [2024-06-14 14:08:42,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:42,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043599011] [2024-06-14 14:08:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:42,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:42,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:42,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:42,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043599011] [2024-06-14 14:08:42,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043599011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:42,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:42,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:42,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421267983] [2024-06-14 14:08:42,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:42,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:42,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:42,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:42,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:42,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:42,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 139 transitions, 1275 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:42,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:42,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:42,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:42,933 INFO L124 PetriNetUnfolderBase]: 1280/2228 cut-off events. [2024-06-14 14:08:42,934 INFO L125 PetriNetUnfolderBase]: For 40731/40731 co-relation queries the response was YES. [2024-06-14 14:08:42,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11761 conditions, 2228 events. 1280/2228 cut-off events. For 40731/40731 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12833 event pairs, 369 based on Foata normal form. 1/2222 useless extension candidates. Maximal degree in co-relation 11705. Up to 1900 conditions per place. [2024-06-14 14:08:42,947 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 105 selfloop transitions, 43 changer transitions 0/157 dead transitions. [2024-06-14 14:08:42,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 157 transitions, 1702 flow [2024-06-14 14:08:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:42,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:42,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 14:08:42,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 14:08:42,949 INFO L175 Difference]: Start difference. First operand has 125 places, 139 transitions, 1275 flow. Second operand 6 states and 153 transitions. [2024-06-14 14:08:42,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 157 transitions, 1702 flow [2024-06-14 14:08:43,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 157 transitions, 1652 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-14 14:08:43,004 INFO L231 Difference]: Finished difference. Result has 130 places, 143 transitions, 1364 flow [2024-06-14 14:08:43,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1364, PETRI_PLACES=130, PETRI_TRANSITIONS=143} [2024-06-14 14:08:43,004 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 85 predicate places. [2024-06-14 14:08:43,004 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 143 transitions, 1364 flow [2024-06-14 14:08:43,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:43,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:43,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:43,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 14:08:43,005 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:43,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:43,005 INFO L85 PathProgramCache]: Analyzing trace with hash 82263672, now seen corresponding path program 5 times [2024-06-14 14:08:43,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:43,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645784155] [2024-06-14 14:08:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:43,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:43,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:43,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:43,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:43,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645784155] [2024-06-14 14:08:43,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645784155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:43,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:43,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:43,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36675957] [2024-06-14 14:08:43,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:43,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:43,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:43,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:43,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:43,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:43,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 143 transitions, 1364 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:43,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:43,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:43,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:43,671 INFO L124 PetriNetUnfolderBase]: 1277/2219 cut-off events. [2024-06-14 14:08:43,671 INFO L125 PetriNetUnfolderBase]: For 43471/43471 co-relation queries the response was YES. [2024-06-14 14:08:43,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11827 conditions, 2219 events. 1277/2219 cut-off events. For 43471/43471 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12777 event pairs, 378 based on Foata normal form. 1/2211 useless extension candidates. Maximal degree in co-relation 11769. Up to 1897 conditions per place. [2024-06-14 14:08:43,685 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 102 selfloop transitions, 43 changer transitions 0/154 dead transitions. [2024-06-14 14:08:43,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 154 transitions, 1732 flow [2024-06-14 14:08:43,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:43,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:43,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 14:08:43,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:08:43,686 INFO L175 Difference]: Start difference. First operand has 130 places, 143 transitions, 1364 flow. Second operand 6 states and 150 transitions. [2024-06-14 14:08:43,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 154 transitions, 1732 flow [2024-06-14 14:08:43,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 154 transitions, 1668 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 14:08:43,743 INFO L231 Difference]: Finished difference. Result has 134 places, 143 transitions, 1392 flow [2024-06-14 14:08:43,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1392, PETRI_PLACES=134, PETRI_TRANSITIONS=143} [2024-06-14 14:08:43,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-14 14:08:43,744 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 143 transitions, 1392 flow [2024-06-14 14:08:43,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:43,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:43,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:43,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 14:08:43,745 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:43,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:43,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1624656626, now seen corresponding path program 6 times [2024-06-14 14:08:43,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:43,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986244162] [2024-06-14 14:08:43,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:43,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:44,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:44,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:44,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986244162] [2024-06-14 14:08:44,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986244162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:44,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:44,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:44,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785736526] [2024-06-14 14:08:44,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:44,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:44,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:44,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:44,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:44,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:44,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 143 transitions, 1392 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:44,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:44,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:44,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:44,412 INFO L124 PetriNetUnfolderBase]: 1274/2215 cut-off events. [2024-06-14 14:08:44,412 INFO L125 PetriNetUnfolderBase]: For 45859/45859 co-relation queries the response was YES. [2024-06-14 14:08:44,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11884 conditions, 2215 events. 1274/2215 cut-off events. For 45859/45859 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12733 event pairs, 378 based on Foata normal form. 1/2207 useless extension candidates. Maximal degree in co-relation 11825. Up to 1894 conditions per place. [2024-06-14 14:08:44,429 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 101 selfloop transitions, 43 changer transitions 0/153 dead transitions. [2024-06-14 14:08:44,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 153 transitions, 1704 flow [2024-06-14 14:08:44,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:08:44,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-14 14:08:44,431 INFO L175 Difference]: Start difference. First operand has 134 places, 143 transitions, 1392 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:08:44,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 153 transitions, 1704 flow [2024-06-14 14:08:44,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 153 transitions, 1630 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:44,492 INFO L231 Difference]: Finished difference. Result has 137 places, 143 transitions, 1410 flow [2024-06-14 14:08:44,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1318, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1410, PETRI_PLACES=137, PETRI_TRANSITIONS=143} [2024-06-14 14:08:44,494 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-14 14:08:44,494 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 143 transitions, 1410 flow [2024-06-14 14:08:44,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:44,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:44,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:44,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 14:08:44,494 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:44,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:44,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1937384886, now seen corresponding path program 2 times [2024-06-14 14:08:44,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:44,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134200505] [2024-06-14 14:08:44,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:44,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:44,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:44,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134200505] [2024-06-14 14:08:44,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134200505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:44,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:44,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:44,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805662145] [2024-06-14 14:08:44,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:44,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:44,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:44,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:44,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:44,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:44,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 143 transitions, 1410 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:44,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:44,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:44,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:45,127 INFO L124 PetriNetUnfolderBase]: 1215/2157 cut-off events. [2024-06-14 14:08:45,127 INFO L125 PetriNetUnfolderBase]: For 49374/49374 co-relation queries the response was YES. [2024-06-14 14:08:45,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11643 conditions, 2157 events. 1215/2157 cut-off events. For 49374/49374 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 12775 event pairs, 361 based on Foata normal form. 2/2141 useless extension candidates. Maximal degree in co-relation 11584. Up to 1756 conditions per place. [2024-06-14 14:08:45,143 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 99 selfloop transitions, 30 changer transitions 0/157 dead transitions. [2024-06-14 14:08:45,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 157 transitions, 1782 flow [2024-06-14 14:08:45,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:45,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 14:08:45,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:08:45,145 INFO L175 Difference]: Start difference. First operand has 137 places, 143 transitions, 1410 flow. Second operand 6 states and 154 transitions. [2024-06-14 14:08:45,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 157 transitions, 1782 flow [2024-06-14 14:08:45,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 157 transitions, 1712 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:45,188 INFO L231 Difference]: Finished difference. Result has 140 places, 146 transitions, 1439 flow [2024-06-14 14:08:45,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1439, PETRI_PLACES=140, PETRI_TRANSITIONS=146} [2024-06-14 14:08:45,189 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 95 predicate places. [2024-06-14 14:08:45,189 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 146 transitions, 1439 flow [2024-06-14 14:08:45,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:45,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:45,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:45,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 14:08:45,190 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:45,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:45,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1952622006, now seen corresponding path program 3 times [2024-06-14 14:08:45,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:45,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762824322] [2024-06-14 14:08:45,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:45,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:45,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:45,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:45,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762824322] [2024-06-14 14:08:45,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762824322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:45,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:45,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:45,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640021304] [2024-06-14 14:08:45,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:45,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:45,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:45,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:45,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:45,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:45,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 146 transitions, 1439 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:45,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:45,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:45,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:45,872 INFO L124 PetriNetUnfolderBase]: 1209/2168 cut-off events. [2024-06-14 14:08:45,872 INFO L125 PetriNetUnfolderBase]: For 51321/51321 co-relation queries the response was YES. [2024-06-14 14:08:45,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11678 conditions, 2168 events. 1209/2168 cut-off events. For 51321/51321 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 12856 event pairs, 353 based on Foata normal form. 2/2159 useless extension candidates. Maximal degree in co-relation 11618. Up to 1786 conditions per place. [2024-06-14 14:08:45,887 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 115 selfloop transitions, 13 changer transitions 0/156 dead transitions. [2024-06-14 14:08:45,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 156 transitions, 1719 flow [2024-06-14 14:08:45,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:08:45,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-14 14:08:45,889 INFO L175 Difference]: Start difference. First operand has 140 places, 146 transitions, 1439 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:08:45,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 156 transitions, 1719 flow [2024-06-14 14:08:45,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 156 transitions, 1621 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:45,944 INFO L231 Difference]: Finished difference. Result has 142 places, 146 transitions, 1373 flow [2024-06-14 14:08:45,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1373, PETRI_PLACES=142, PETRI_TRANSITIONS=146} [2024-06-14 14:08:45,945 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 97 predicate places. [2024-06-14 14:08:45,945 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 146 transitions, 1373 flow [2024-06-14 14:08:45,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:45,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:45,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:45,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 14:08:45,946 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)] === [2024-06-14 14:08:45,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:45,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1957505228, now seen corresponding path program 1 times [2024-06-14 14:08:45,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:45,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121321565] [2024-06-14 14:08:45,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:45,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:46,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:46,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:46,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121321565] [2024-06-14 14:08:46,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121321565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:46,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:46,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:46,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199153668] [2024-06-14 14:08:46,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:46,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:46,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:46,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:46,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:46,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:46,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 146 transitions, 1373 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:46,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:46,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:46,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:46,595 INFO L124 PetriNetUnfolderBase]: 1214/2187 cut-off events. [2024-06-14 14:08:46,596 INFO L125 PetriNetUnfolderBase]: For 44591/44689 co-relation queries the response was YES. [2024-06-14 14:08:46,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11341 conditions, 2187 events. 1214/2187 cut-off events. For 44591/44689 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13008 event pairs, 312 based on Foata normal form. 1/2147 useless extension candidates. Maximal degree in co-relation 11280. Up to 1825 conditions per place. [2024-06-14 14:08:46,612 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 129 selfloop transitions, 13 changer transitions 0/165 dead transitions. [2024-06-14 14:08:46,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 165 transitions, 1727 flow [2024-06-14 14:08:46,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:46,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 14:08:46,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5871212121212122 [2024-06-14 14:08:46,614 INFO L175 Difference]: Start difference. First operand has 142 places, 146 transitions, 1373 flow. Second operand 6 states and 155 transitions. [2024-06-14 14:08:46,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 165 transitions, 1727 flow [2024-06-14 14:08:46,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 165 transitions, 1666 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:46,677 INFO L231 Difference]: Finished difference. Result has 141 places, 149 transitions, 1380 flow [2024-06-14 14:08:46,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1380, PETRI_PLACES=141, PETRI_TRANSITIONS=149} [2024-06-14 14:08:46,678 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-14 14:08:46,678 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 149 transitions, 1380 flow [2024-06-14 14:08:46,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:46,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:46,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:46,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 14:08:46,679 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)] === [2024-06-14 14:08:46,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:46,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1962266828, now seen corresponding path program 2 times [2024-06-14 14:08:46,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:46,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828476971] [2024-06-14 14:08:46,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:46,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:46,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:47,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:47,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828476971] [2024-06-14 14:08:47,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828476971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:47,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:47,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:47,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200094637] [2024-06-14 14:08:47,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:47,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:47,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:47,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:47,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:47,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:47,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 149 transitions, 1380 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:47,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:47,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:47,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:47,428 INFO L124 PetriNetUnfolderBase]: 1229/2210 cut-off events. [2024-06-14 14:08:47,428 INFO L125 PetriNetUnfolderBase]: For 47545/47691 co-relation queries the response was YES. [2024-06-14 14:08:47,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11765 conditions, 2210 events. 1229/2210 cut-off events. For 47545/47691 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13162 event pairs, 313 based on Foata normal form. 1/2168 useless extension candidates. Maximal degree in co-relation 11705. Up to 1821 conditions per place. [2024-06-14 14:08:47,442 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 116 selfloop transitions, 30 changer transitions 0/169 dead transitions. [2024-06-14 14:08:47,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 169 transitions, 1840 flow [2024-06-14 14:08:47,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:47,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:47,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 14:08:47,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-14 14:08:47,443 INFO L175 Difference]: Start difference. First operand has 141 places, 149 transitions, 1380 flow. Second operand 6 states and 157 transitions. [2024-06-14 14:08:47,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 169 transitions, 1840 flow [2024-06-14 14:08:47,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 169 transitions, 1794 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:47,505 INFO L231 Difference]: Finished difference. Result has 143 places, 155 transitions, 1479 flow [2024-06-14 14:08:47,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1479, PETRI_PLACES=143, PETRI_TRANSITIONS=155} [2024-06-14 14:08:47,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-14 14:08:47,506 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 155 transitions, 1479 flow [2024-06-14 14:08:47,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:47,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:47,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:47,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 14:08:47,506 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)] === [2024-06-14 14:08:47,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:47,507 INFO L85 PathProgramCache]: Analyzing trace with hash 88938840, now seen corresponding path program 3 times [2024-06-14 14:08:47,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:47,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132565162] [2024-06-14 14:08:47,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:47,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:47,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:47,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132565162] [2024-06-14 14:08:47,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132565162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:47,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:47,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:47,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697281107] [2024-06-14 14:08:47,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:47,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:47,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:47,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:47,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:47,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:47,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 155 transitions, 1479 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:47,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:47,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:47,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:48,111 INFO L124 PetriNetUnfolderBase]: 1221/2195 cut-off events. [2024-06-14 14:08:48,112 INFO L125 PetriNetUnfolderBase]: For 50621/50775 co-relation queries the response was YES. [2024-06-14 14:08:48,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11933 conditions, 2195 events. 1221/2195 cut-off events. For 50621/50775 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13062 event pairs, 320 based on Foata normal form. 2/2153 useless extension candidates. Maximal degree in co-relation 11872. Up to 1811 conditions per place. [2024-06-14 14:08:48,127 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 112 selfloop transitions, 30 changer transitions 0/165 dead transitions. [2024-06-14 14:08:48,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 165 transitions, 1787 flow [2024-06-14 14:08:48,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 14:08:48,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 14:08:48,128 INFO L175 Difference]: Start difference. First operand has 143 places, 155 transitions, 1479 flow. Second operand 6 states and 153 transitions. [2024-06-14 14:08:48,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 165 transitions, 1787 flow [2024-06-14 14:08:48,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 165 transitions, 1721 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-14 14:08:48,211 INFO L231 Difference]: Finished difference. Result has 147 places, 155 transitions, 1480 flow [2024-06-14 14:08:48,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1480, PETRI_PLACES=147, PETRI_TRANSITIONS=155} [2024-06-14 14:08:48,211 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 102 predicate places. [2024-06-14 14:08:48,212 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 155 transitions, 1480 flow [2024-06-14 14:08:48,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:48,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:48,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:48,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 14:08:48,212 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:48,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:48,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1952639862, now seen corresponding path program 1 times [2024-06-14 14:08:48,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:48,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089845862] [2024-06-14 14:08:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:48,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:48,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:48,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089845862] [2024-06-14 14:08:48,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089845862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:48,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:48,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 14:08:48,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80869084] [2024-06-14 14:08:48,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:48,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 14:08:48,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:48,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 14:08:48,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 14:08:48,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:08:48,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 155 transitions, 1480 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:48,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:48,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:08:48,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:48,848 INFO L124 PetriNetUnfolderBase]: 1218/2189 cut-off events. [2024-06-14 14:08:48,848 INFO L125 PetriNetUnfolderBase]: For 62043/62043 co-relation queries the response was YES. [2024-06-14 14:08:48,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12363 conditions, 2189 events. 1218/2189 cut-off events. For 62043/62043 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13011 event pairs, 350 based on Foata normal form. 2/2180 useless extension candidates. Maximal degree in co-relation 12300. Up to 1796 conditions per place. [2024-06-14 14:08:48,866 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 128 selfloop transitions, 12 changer transitions 0/168 dead transitions. [2024-06-14 14:08:48,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 168 transitions, 1816 flow [2024-06-14 14:08:48,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:48,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:48,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:08:48,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-14 14:08:48,867 INFO L175 Difference]: Start difference. First operand has 147 places, 155 transitions, 1480 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:08:48,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 168 transitions, 1816 flow [2024-06-14 14:08:48,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 168 transitions, 1735 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:48,944 INFO L231 Difference]: Finished difference. Result has 148 places, 157 transitions, 1462 flow [2024-06-14 14:08:48,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1399, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1462, PETRI_PLACES=148, PETRI_TRANSITIONS=157} [2024-06-14 14:08:48,945 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 103 predicate places. [2024-06-14 14:08:48,945 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 157 transitions, 1462 flow [2024-06-14 14:08:48,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:48,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:48,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:48,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 14:08:48,945 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:48,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:48,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1672104650, now seen corresponding path program 1 times [2024-06-14 14:08:48,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:48,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961463833] [2024-06-14 14:08:48,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:48,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:49,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:49,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961463833] [2024-06-14 14:08:49,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961463833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:49,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:49,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:49,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701946756] [2024-06-14 14:08:49,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:49,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:49,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:49,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:49,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:49,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:49,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 157 transitions, 1462 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:49,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:49,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:49,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:49,795 INFO L124 PetriNetUnfolderBase]: 1410/2485 cut-off events. [2024-06-14 14:08:49,795 INFO L125 PetriNetUnfolderBase]: For 69663/69663 co-relation queries the response was YES. [2024-06-14 14:08:49,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13791 conditions, 2485 events. 1410/2485 cut-off events. For 69663/69663 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 14854 event pairs, 349 based on Foata normal form. 12/2487 useless extension candidates. Maximal degree in co-relation 13727. Up to 1768 conditions per place. [2024-06-14 14:08:49,813 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 162 selfloop transitions, 47 changer transitions 0/218 dead transitions. [2024-06-14 14:08:49,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 218 transitions, 2144 flow [2024-06-14 14:08:49,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:49,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:49,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 285 transitions. [2024-06-14 14:08:49,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888429752066116 [2024-06-14 14:08:49,815 INFO L175 Difference]: Start difference. First operand has 148 places, 157 transitions, 1462 flow. Second operand 11 states and 285 transitions. [2024-06-14 14:08:49,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 218 transitions, 2144 flow [2024-06-14 14:08:49,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 218 transitions, 2097 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:49,951 INFO L231 Difference]: Finished difference. Result has 157 places, 165 transitions, 1635 flow [2024-06-14 14:08:49,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1415, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1635, PETRI_PLACES=157, PETRI_TRANSITIONS=165} [2024-06-14 14:08:49,951 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 112 predicate places. [2024-06-14 14:08:49,952 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 165 transitions, 1635 flow [2024-06-14 14:08:49,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:49,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:49,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:49,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 14:08:49,952 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:49,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:49,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1020588268, now seen corresponding path program 2 times [2024-06-14 14:08:49,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:49,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880160741] [2024-06-14 14:08:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:49,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:49,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:50,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:50,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880160741] [2024-06-14 14:08:50,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880160741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:50,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:50,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:50,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406360646] [2024-06-14 14:08:50,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:50,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:50,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:50,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:50,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:50,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:50,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 165 transitions, 1635 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:50,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:50,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:50,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:50,831 INFO L124 PetriNetUnfolderBase]: 1520/2704 cut-off events. [2024-06-14 14:08:50,832 INFO L125 PetriNetUnfolderBase]: For 76130/76130 co-relation queries the response was YES. [2024-06-14 14:08:50,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15191 conditions, 2704 events. 1520/2704 cut-off events. For 76130/76130 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16665 event pairs, 382 based on Foata normal form. 12/2711 useless extension candidates. Maximal degree in co-relation 15124. Up to 2041 conditions per place. [2024-06-14 14:08:50,851 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 166 selfloop transitions, 49 changer transitions 0/224 dead transitions. [2024-06-14 14:08:50,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 224 transitions, 2308 flow [2024-06-14 14:08:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:08:50,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:08:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 305 transitions. [2024-06-14 14:08:50,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5776515151515151 [2024-06-14 14:08:50,853 INFO L175 Difference]: Start difference. First operand has 157 places, 165 transitions, 1635 flow. Second operand 12 states and 305 transitions. [2024-06-14 14:08:50,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 224 transitions, 2308 flow [2024-06-14 14:08:50,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 224 transitions, 2160 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:50,938 INFO L231 Difference]: Finished difference. Result has 163 places, 171 transitions, 1690 flow [2024-06-14 14:08:50,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1493, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1690, PETRI_PLACES=163, PETRI_TRANSITIONS=171} [2024-06-14 14:08:50,938 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-14 14:08:50,938 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 171 transitions, 1690 flow [2024-06-14 14:08:50,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:50,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:50,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:50,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 14:08:50,939 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:50,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:50,940 INFO L85 PathProgramCache]: Analyzing trace with hash 818203338, now seen corresponding path program 3 times [2024-06-14 14:08:50,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:50,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610624604] [2024-06-14 14:08:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:50,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:51,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:51,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610624604] [2024-06-14 14:08:51,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610624604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:51,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:51,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:51,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121362385] [2024-06-14 14:08:51,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:51,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:51,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:51,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:51,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:51,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:51,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 171 transitions, 1690 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:51,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:51,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:51,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:51,929 INFO L124 PetriNetUnfolderBase]: 1602/2856 cut-off events. [2024-06-14 14:08:51,929 INFO L125 PetriNetUnfolderBase]: For 81420/81420 co-relation queries the response was YES. [2024-06-14 14:08:51,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16028 conditions, 2856 events. 1602/2856 cut-off events. For 81420/81420 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17840 event pairs, 407 based on Foata normal form. 12/2863 useless extension candidates. Maximal degree in co-relation 15958. Up to 2183 conditions per place. [2024-06-14 14:08:51,951 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 166 selfloop transitions, 53 changer transitions 0/228 dead transitions. [2024-06-14 14:08:51,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 228 transitions, 2358 flow [2024-06-14 14:08:51,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:08:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:08:51,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 302 transitions. [2024-06-14 14:08:51,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571969696969697 [2024-06-14 14:08:51,953 INFO L175 Difference]: Start difference. First operand has 163 places, 171 transitions, 1690 flow. Second operand 12 states and 302 transitions. [2024-06-14 14:08:51,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 228 transitions, 2358 flow [2024-06-14 14:08:52,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 228 transitions, 2234 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-14 14:08:52,142 INFO L231 Difference]: Finished difference. Result has 168 places, 175 transitions, 1756 flow [2024-06-14 14:08:52,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1570, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1756, PETRI_PLACES=168, PETRI_TRANSITIONS=175} [2024-06-14 14:08:52,142 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-14 14:08:52,142 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 175 transitions, 1756 flow [2024-06-14 14:08:52,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:52,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:52,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:52,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 14:08:52,143 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:52,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:52,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1999723830, now seen corresponding path program 4 times [2024-06-14 14:08:52,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:52,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111594436] [2024-06-14 14:08:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:52,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:52,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:52,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111594436] [2024-06-14 14:08:52,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111594436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:52,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:52,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:52,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136453493] [2024-06-14 14:08:52,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:52,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:52,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:52,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:52,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:52,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:52,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 175 transitions, 1756 flow. Second operand has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:52,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:52,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:52,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:53,077 INFO L124 PetriNetUnfolderBase]: 1582/2816 cut-off events. [2024-06-14 14:08:53,077 INFO L125 PetriNetUnfolderBase]: For 79784/79784 co-relation queries the response was YES. [2024-06-14 14:08:53,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15556 conditions, 2816 events. 1582/2816 cut-off events. For 79784/79784 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17547 event pairs, 352 based on Foata normal form. 12/2823 useless extension candidates. Maximal degree in co-relation 15484. Up to 1591 conditions per place. [2024-06-14 14:08:53,098 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 152 selfloop transitions, 63 changer transitions 0/224 dead transitions. [2024-06-14 14:08:53,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 224 transitions, 2300 flow [2024-06-14 14:08:53,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:08:53,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:08:53,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 279 transitions. [2024-06-14 14:08:53,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764462809917356 [2024-06-14 14:08:53,100 INFO L175 Difference]: Start difference. First operand has 168 places, 175 transitions, 1756 flow. Second operand 11 states and 279 transitions. [2024-06-14 14:08:53,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 224 transitions, 2300 flow [2024-06-14 14:08:53,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 224 transitions, 2189 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:53,246 INFO L231 Difference]: Finished difference. Result has 171 places, 174 transitions, 1735 flow [2024-06-14 14:08:53,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1735, PETRI_PLACES=171, PETRI_TRANSITIONS=174} [2024-06-14 14:08:53,249 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 126 predicate places. [2024-06-14 14:08:53,249 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 174 transitions, 1735 flow [2024-06-14 14:08:53,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.555555555555557) internal successors, (158), 9 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:53,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:53,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:53,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 14:08:53,249 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)] === [2024-06-14 14:08:53,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:53,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1056590423, now seen corresponding path program 1 times [2024-06-14 14:08:53,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:53,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641565579] [2024-06-14 14:08:53,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:53,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:53,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:53,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:53,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641565579] [2024-06-14 14:08:53,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641565579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:53,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:53,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:53,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947099165] [2024-06-14 14:08:53,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:53,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:53,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:53,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:53,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:53,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:53,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 174 transitions, 1735 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:53,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:53,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:53,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:54,236 INFO L124 PetriNetUnfolderBase]: 1595/2840 cut-off events. [2024-06-14 14:08:54,236 INFO L125 PetriNetUnfolderBase]: For 78542/78542 co-relation queries the response was YES. [2024-06-14 14:08:54,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15774 conditions, 2840 events. 1595/2840 cut-off events. For 78542/78542 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17786 event pairs, 401 based on Foata normal form. 1/2838 useless extension candidates. Maximal degree in co-relation 15701. Up to 2431 conditions per place. [2024-06-14 14:08:54,257 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 152 selfloop transitions, 40 changer transitions 0/201 dead transitions. [2024-06-14 14:08:54,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 201 transitions, 2313 flow [2024-06-14 14:08:54,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:54,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:54,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-14 14:08:54,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-14 14:08:54,259 INFO L175 Difference]: Start difference. First operand has 171 places, 174 transitions, 1735 flow. Second operand 6 states and 159 transitions. [2024-06-14 14:08:54,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 201 transitions, 2313 flow [2024-06-14 14:08:54,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 201 transitions, 2142 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-14 14:08:54,412 INFO L231 Difference]: Finished difference. Result has 168 places, 181 transitions, 1751 flow [2024-06-14 14:08:54,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1566, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1751, PETRI_PLACES=168, PETRI_TRANSITIONS=181} [2024-06-14 14:08:54,412 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-14 14:08:54,412 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 181 transitions, 1751 flow [2024-06-14 14:08:54,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:54,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:54,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:54,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 14:08:54,413 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)] === [2024-06-14 14:08:54,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:54,413 INFO L85 PathProgramCache]: Analyzing trace with hash -294291619, now seen corresponding path program 2 times [2024-06-14 14:08:54,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:54,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601696232] [2024-06-14 14:08:54,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:54,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:54,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:54,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601696232] [2024-06-14 14:08:54,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601696232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:54,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:54,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:54,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457407408] [2024-06-14 14:08:54,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:54,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:54,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:54,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:54,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:54,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:54,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 181 transitions, 1751 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:54,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:54,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:54,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:55,344 INFO L124 PetriNetUnfolderBase]: 1600/2859 cut-off events. [2024-06-14 14:08:55,345 INFO L125 PetriNetUnfolderBase]: For 80703/80703 co-relation queries the response was YES. [2024-06-14 14:08:55,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15789 conditions, 2859 events. 1600/2859 cut-off events. For 80703/80703 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17973 event pairs, 401 based on Foata normal form. 1/2857 useless extension candidates. Maximal degree in co-relation 15715. Up to 2437 conditions per place. [2024-06-14 14:08:55,367 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 152 selfloop transitions, 45 changer transitions 0/206 dead transitions. [2024-06-14 14:08:55,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 206 transitions, 2316 flow [2024-06-14 14:08:55,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:08:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:08:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 14:08:55,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-14 14:08:55,369 INFO L175 Difference]: Start difference. First operand has 168 places, 181 transitions, 1751 flow. Second operand 8 states and 201 transitions. [2024-06-14 14:08:55,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 206 transitions, 2316 flow [2024-06-14 14:08:55,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 206 transitions, 2243 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 14:08:55,531 INFO L231 Difference]: Finished difference. Result has 173 places, 184 transitions, 1819 flow [2024-06-14 14:08:55,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1819, PETRI_PLACES=173, PETRI_TRANSITIONS=184} [2024-06-14 14:08:55,532 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 128 predicate places. [2024-06-14 14:08:55,532 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 184 transitions, 1819 flow [2024-06-14 14:08:55,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:55,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:55,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:55,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 14:08:55,533 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)] === [2024-06-14 14:08:55,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:55,533 INFO L85 PathProgramCache]: Analyzing trace with hash 2070794393, now seen corresponding path program 1 times [2024-06-14 14:08:55,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:55,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786314581] [2024-06-14 14:08:55,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:55,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:55,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:55,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:55,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786314581] [2024-06-14 14:08:55,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786314581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:55,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:55,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:55,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497503657] [2024-06-14 14:08:55,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:55,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:55,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:55,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:55,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:56,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:56,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 184 transitions, 1819 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:56,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:56,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:56,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:56,443 INFO L124 PetriNetUnfolderBase]: 1608/2871 cut-off events. [2024-06-14 14:08:56,444 INFO L125 PetriNetUnfolderBase]: For 81623/81623 co-relation queries the response was YES. [2024-06-14 14:08:56,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15924 conditions, 2871 events. 1608/2871 cut-off events. For 81623/81623 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 17986 event pairs, 320 based on Foata normal form. 2/2870 useless extension candidates. Maximal degree in co-relation 15849. Up to 2437 conditions per place. [2024-06-14 14:08:56,465 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 176 selfloop transitions, 25 changer transitions 0/210 dead transitions. [2024-06-14 14:08:56,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 210 transitions, 2401 flow [2024-06-14 14:08:56,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:56,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:56,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 14:08:56,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5946969696969697 [2024-06-14 14:08:56,469 INFO L175 Difference]: Start difference. First operand has 173 places, 184 transitions, 1819 flow. Second operand 6 states and 157 transitions. [2024-06-14 14:08:56,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 210 transitions, 2401 flow [2024-06-14 14:08:56,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 210 transitions, 2295 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:08:56,595 INFO L231 Difference]: Finished difference. Result has 172 places, 188 transitions, 1822 flow [2024-06-14 14:08:56,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1822, PETRI_PLACES=172, PETRI_TRANSITIONS=188} [2024-06-14 14:08:56,597 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 127 predicate places. [2024-06-14 14:08:56,597 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 188 transitions, 1822 flow [2024-06-14 14:08:56,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:56,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:56,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:56,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 14:08:56,597 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)] === [2024-06-14 14:08:56,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:56,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1727165001, now seen corresponding path program 2 times [2024-06-14 14:08:56,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:56,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510478146] [2024-06-14 14:08:56,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:56,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:56,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:57,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:57,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510478146] [2024-06-14 14:08:57,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510478146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:57,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:57,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:57,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082923190] [2024-06-14 14:08:57,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:57,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:57,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:57,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:57,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:57,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:57,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 188 transitions, 1822 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:57,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:57,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:57,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:57,442 INFO L124 PetriNetUnfolderBase]: 1616/2883 cut-off events. [2024-06-14 14:08:57,442 INFO L125 PetriNetUnfolderBase]: For 82032/82032 co-relation queries the response was YES. [2024-06-14 14:08:57,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16044 conditions, 2883 events. 1616/2883 cut-off events. For 82032/82032 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18085 event pairs, 399 based on Foata normal form. 2/2882 useless extension candidates. Maximal degree in co-relation 15969. Up to 2492 conditions per place. [2024-06-14 14:08:57,464 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 175 selfloop transitions, 23 changer transitions 0/207 dead transitions. [2024-06-14 14:08:57,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 207 transitions, 2288 flow [2024-06-14 14:08:57,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:08:57,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:08:57,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 14:08:57,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 14:08:57,465 INFO L175 Difference]: Start difference. First operand has 172 places, 188 transitions, 1822 flow. Second operand 6 states and 153 transitions. [2024-06-14 14:08:57,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 207 transitions, 2288 flow [2024-06-14 14:08:57,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 207 transitions, 2227 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 14:08:57,669 INFO L231 Difference]: Finished difference. Result has 176 places, 190 transitions, 1844 flow [2024-06-14 14:08:57,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1771, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1844, PETRI_PLACES=176, PETRI_TRANSITIONS=190} [2024-06-14 14:08:57,669 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 131 predicate places. [2024-06-14 14:08:57,670 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 190 transitions, 1844 flow [2024-06-14 14:08:57,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:57,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:57,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:57,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 14:08:57,670 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)] === [2024-06-14 14:08:57,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:57,671 INFO L85 PathProgramCache]: Analyzing trace with hash 820747637, now seen corresponding path program 3 times [2024-06-14 14:08:57,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:57,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368047727] [2024-06-14 14:08:57,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:57,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:58,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:58,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368047727] [2024-06-14 14:08:58,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368047727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:58,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:58,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:58,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925618101] [2024-06-14 14:08:58,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:58,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:58,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:58,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:58,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:58,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:58,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 190 transitions, 1844 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:58,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:58,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:58,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:58,499 INFO L124 PetriNetUnfolderBase]: 1629/2901 cut-off events. [2024-06-14 14:08:58,500 INFO L125 PetriNetUnfolderBase]: For 85601/85601 co-relation queries the response was YES. [2024-06-14 14:08:58,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16279 conditions, 2901 events. 1629/2901 cut-off events. For 85601/85601 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 18205 event pairs, 405 based on Foata normal form. 1/2896 useless extension candidates. Maximal degree in co-relation 16202. Up to 2407 conditions per place. [2024-06-14 14:08:58,524 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 152 selfloop transitions, 75 changer transitions 0/236 dead transitions. [2024-06-14 14:08:58,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 236 transitions, 2744 flow [2024-06-14 14:08:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:08:58,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:08:58,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-14 14:08:58,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-06-14 14:08:58,526 INFO L175 Difference]: Start difference. First operand has 176 places, 190 transitions, 1844 flow. Second operand 9 states and 236 transitions. [2024-06-14 14:08:58,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 236 transitions, 2744 flow [2024-06-14 14:08:58,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 236 transitions, 2691 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 14:08:58,670 INFO L231 Difference]: Finished difference. Result has 181 places, 199 transitions, 2067 flow [2024-06-14 14:08:58,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2067, PETRI_PLACES=181, PETRI_TRANSITIONS=199} [2024-06-14 14:08:58,671 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-14 14:08:58,671 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 199 transitions, 2067 flow [2024-06-14 14:08:58,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:58,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:58,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:58,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 14:08:58,672 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)] === [2024-06-14 14:08:58,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:58,672 INFO L85 PathProgramCache]: Analyzing trace with hash 832175477, now seen corresponding path program 4 times [2024-06-14 14:08:58,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:58,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685025035] [2024-06-14 14:08:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:58,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:58,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:08:59,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:08:59,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:08:59,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685025035] [2024-06-14 14:08:59,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685025035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:08:59,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:08:59,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:08:59,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022195257] [2024-06-14 14:08:59,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:08:59,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:08:59,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:08:59,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:08:59,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:08:59,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:08:59,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 199 transitions, 2067 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:59,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:08:59,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:08:59,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:08:59,553 INFO L124 PetriNetUnfolderBase]: 1634/2910 cut-off events. [2024-06-14 14:08:59,553 INFO L125 PetriNetUnfolderBase]: For 91149/91149 co-relation queries the response was YES. [2024-06-14 14:08:59,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16832 conditions, 2910 events. 1634/2910 cut-off events. For 91149/91149 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18320 event pairs, 405 based on Foata normal form. 1/2905 useless extension candidates. Maximal degree in co-relation 16754. Up to 2413 conditions per place. [2024-06-14 14:08:59,575 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 147 selfloop transitions, 80 changer transitions 0/236 dead transitions. [2024-06-14 14:08:59,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 236 transitions, 2813 flow [2024-06-14 14:08:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:08:59,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:08:59,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-06-14 14:08:59,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5704545454545454 [2024-06-14 14:08:59,578 INFO L175 Difference]: Start difference. First operand has 181 places, 199 transitions, 2067 flow. Second operand 10 states and 251 transitions. [2024-06-14 14:08:59,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 236 transitions, 2813 flow [2024-06-14 14:08:59,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 236 transitions, 2595 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-14 14:08:59,712 INFO L231 Difference]: Finished difference. Result has 186 places, 202 transitions, 2059 flow [2024-06-14 14:08:59,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2059, PETRI_PLACES=186, PETRI_TRANSITIONS=202} [2024-06-14 14:08:59,713 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 141 predicate places. [2024-06-14 14:08:59,713 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 202 transitions, 2059 flow [2024-06-14 14:08:59,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:08:59,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:08:59,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:08:59,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 14:08:59,713 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:08:59,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:08:59,714 INFO L85 PathProgramCache]: Analyzing trace with hash 182334521, now seen corresponding path program 5 times [2024-06-14 14:08:59,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:08:59,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551810929] [2024-06-14 14:08:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:08:59,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:08:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:00,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:00,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:00,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551810929] [2024-06-14 14:09:00,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551810929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:00,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:00,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:00,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523081158] [2024-06-14 14:09:00,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:00,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:00,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:00,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:00,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:00,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:00,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 202 transitions, 2059 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:00,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:00,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:00,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:00,567 INFO L124 PetriNetUnfolderBase]: 1647/2932 cut-off events. [2024-06-14 14:09:00,568 INFO L125 PetriNetUnfolderBase]: For 93613/93613 co-relation queries the response was YES. [2024-06-14 14:09:00,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16680 conditions, 2932 events. 1647/2932 cut-off events. For 93613/93613 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18474 event pairs, 405 based on Foata normal form. 1/2927 useless extension candidates. Maximal degree in co-relation 16602. Up to 2428 conditions per place. [2024-06-14 14:09:00,591 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 141 selfloop transitions, 86 changer transitions 0/236 dead transitions. [2024-06-14 14:09:00,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 236 transitions, 2815 flow [2024-06-14 14:09:00,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:00,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:00,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-14 14:09:00,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 14:09:00,592 INFO L175 Difference]: Start difference. First operand has 186 places, 202 transitions, 2059 flow. Second operand 10 states and 245 transitions. [2024-06-14 14:09:00,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 236 transitions, 2815 flow [2024-06-14 14:09:00,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 236 transitions, 2671 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:00,725 INFO L231 Difference]: Finished difference. Result has 190 places, 208 transitions, 2159 flow [2024-06-14 14:09:00,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2159, PETRI_PLACES=190, PETRI_TRANSITIONS=208} [2024-06-14 14:09:00,726 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 145 predicate places. [2024-06-14 14:09:00,726 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 208 transitions, 2159 flow [2024-06-14 14:09:00,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:00,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:00,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:00,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 14:09:00,726 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:00,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:00,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1579574311, now seen corresponding path program 1 times [2024-06-14 14:09:00,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:00,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813413509] [2024-06-14 14:09:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:00,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:00,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:01,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:01,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813413509] [2024-06-14 14:09:01,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813413509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:01,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:01,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:01,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706420865] [2024-06-14 14:09:01,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:01,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:01,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:01,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:01,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:01,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:01,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 208 transitions, 2159 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:01,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:01,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:01,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:01,513 INFO L124 PetriNetUnfolderBase]: 1652/2940 cut-off events. [2024-06-14 14:09:01,513 INFO L125 PetriNetUnfolderBase]: For 97596/97596 co-relation queries the response was YES. [2024-06-14 14:09:01,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16834 conditions, 2940 events. 1652/2940 cut-off events. For 97596/97596 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18547 event pairs, 405 based on Foata normal form. 1/2935 useless extension candidates. Maximal degree in co-relation 16755. Up to 2514 conditions per place. [2024-06-14 14:09:01,538 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 197 selfloop transitions, 28 changer transitions 0/234 dead transitions. [2024-06-14 14:09:01,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 234 transitions, 2705 flow [2024-06-14 14:09:01,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:01,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:09:01,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-14 14:09:01,539 INFO L175 Difference]: Start difference. First operand has 190 places, 208 transitions, 2159 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:09:01,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 234 transitions, 2705 flow [2024-06-14 14:09:01,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 234 transitions, 2572 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:01,717 INFO L231 Difference]: Finished difference. Result has 191 places, 211 transitions, 2132 flow [2024-06-14 14:09:01,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2132, PETRI_PLACES=191, PETRI_TRANSITIONS=211} [2024-06-14 14:09:01,717 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 146 predicate places. [2024-06-14 14:09:01,718 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 211 transitions, 2132 flow [2024-06-14 14:09:01,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:01,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:01,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:01,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 14:09:01,718 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)] === [2024-06-14 14:09:01,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:01,719 INFO L85 PathProgramCache]: Analyzing trace with hash 832182421, now seen corresponding path program 2 times [2024-06-14 14:09:01,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:01,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416271042] [2024-06-14 14:09:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:01,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:02,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:02,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416271042] [2024-06-14 14:09:02,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416271042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:02,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:02,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:02,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048628669] [2024-06-14 14:09:02,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:02,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:02,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:02,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:02,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:02,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:02,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 211 transitions, 2132 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:02,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:02,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:02,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:02,467 INFO L124 PetriNetUnfolderBase]: 1665/2959 cut-off events. [2024-06-14 14:09:02,467 INFO L125 PetriNetUnfolderBase]: For 103013/103013 co-relation queries the response was YES. [2024-06-14 14:09:02,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17247 conditions, 2959 events. 1665/2959 cut-off events. For 103013/103013 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 18671 event pairs, 411 based on Foata normal form. 1/2951 useless extension candidates. Maximal degree in co-relation 17167. Up to 2463 conditions per place. [2024-06-14 14:09:02,492 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 179 selfloop transitions, 61 changer transitions 0/249 dead transitions. [2024-06-14 14:09:02,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 249 transitions, 3016 flow [2024-06-14 14:09:02,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:02,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 14:09:02,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-14 14:09:02,493 INFO L175 Difference]: Start difference. First operand has 191 places, 211 transitions, 2132 flow. Second operand 7 states and 183 transitions. [2024-06-14 14:09:02,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 249 transitions, 3016 flow [2024-06-14 14:09:02,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 249 transitions, 2932 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:02,645 INFO L231 Difference]: Finished difference. Result has 194 places, 227 transitions, 2386 flow [2024-06-14 14:09:02,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2048, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2386, PETRI_PLACES=194, PETRI_TRANSITIONS=227} [2024-06-14 14:09:02,646 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 149 predicate places. [2024-06-14 14:09:02,646 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 227 transitions, 2386 flow [2024-06-14 14:09:02,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:02,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:02,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:02,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 14:09:02,647 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)] === [2024-06-14 14:09:02,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:02,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1928940935, now seen corresponding path program 1 times [2024-06-14 14:09:02,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:02,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623424464] [2024-06-14 14:09:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:02,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:02,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:02,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623424464] [2024-06-14 14:09:02,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623424464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:02,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:02,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:02,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643812548] [2024-06-14 14:09:02,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:02,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:02,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:02,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:02,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:03,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:03,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 227 transitions, 2386 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:03,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:03,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:03,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:03,405 INFO L124 PetriNetUnfolderBase]: 1678/2983 cut-off events. [2024-06-14 14:09:03,406 INFO L125 PetriNetUnfolderBase]: For 109832/109832 co-relation queries the response was YES. [2024-06-14 14:09:03,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17861 conditions, 2983 events. 1678/2983 cut-off events. For 109832/109832 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 18841 event pairs, 406 based on Foata normal form. 1/2976 useless extension candidates. Maximal degree in co-relation 17779. Up to 2509 conditions per place. [2024-06-14 14:09:03,430 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 199 selfloop transitions, 56 changer transitions 0/264 dead transitions. [2024-06-14 14:09:03,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 264 transitions, 3286 flow [2024-06-14 14:09:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:03,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 14:09:03,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:09:03,432 INFO L175 Difference]: Start difference. First operand has 194 places, 227 transitions, 2386 flow. Second operand 7 states and 182 transitions. [2024-06-14 14:09:03,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 264 transitions, 3286 flow [2024-06-14 14:09:03,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 264 transitions, 3226 flow, removed 26 selfloop flow, removed 1 redundant places. [2024-06-14 14:09:03,646 INFO L231 Difference]: Finished difference. Result has 201 places, 242 transitions, 2649 flow [2024-06-14 14:09:03,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2649, PETRI_PLACES=201, PETRI_TRANSITIONS=242} [2024-06-14 14:09:03,646 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 156 predicate places. [2024-06-14 14:09:03,647 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 242 transitions, 2649 flow [2024-06-14 14:09:03,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:03,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:03,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:03,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 14:09:03,647 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)] === [2024-06-14 14:09:03,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:03,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1756457989, now seen corresponding path program 3 times [2024-06-14 14:09:03,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:03,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858732204] [2024-06-14 14:09:03,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:03,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:03,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:03,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:03,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858732204] [2024-06-14 14:09:03,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858732204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:03,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:03,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:03,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514631109] [2024-06-14 14:09:03,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:03,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:03,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:03,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:03,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:04,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:04,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 242 transitions, 2649 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:04,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:04,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:04,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:04,438 INFO L124 PetriNetUnfolderBase]: 1691/3003 cut-off events. [2024-06-14 14:09:04,439 INFO L125 PetriNetUnfolderBase]: For 116682/116682 co-relation queries the response was YES. [2024-06-14 14:09:04,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18501 conditions, 3003 events. 1691/3003 cut-off events. For 116682/116682 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 18986 event pairs, 410 based on Foata normal form. 1/2995 useless extension candidates. Maximal degree in co-relation 18415. Up to 2496 conditions per place. [2024-06-14 14:09:04,466 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 189 selfloop transitions, 69 changer transitions 0/267 dead transitions. [2024-06-14 14:09:04,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 267 transitions, 3483 flow [2024-06-14 14:09:04,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:09:04,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-14 14:09:04,467 INFO L175 Difference]: Start difference. First operand has 201 places, 242 transitions, 2649 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:09:04,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 267 transitions, 3483 flow [2024-06-14 14:09:04,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 267 transitions, 3402 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-14 14:09:04,883 INFO L231 Difference]: Finished difference. Result has 206 places, 248 transitions, 2800 flow [2024-06-14 14:09:04,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2568, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2800, PETRI_PLACES=206, PETRI_TRANSITIONS=248} [2024-06-14 14:09:04,884 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-14 14:09:04,884 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 248 transitions, 2800 flow [2024-06-14 14:09:04,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:04,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:04,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:04,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 14:09:04,885 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)] === [2024-06-14 14:09:04,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash 515789497, now seen corresponding path program 2 times [2024-06-14 14:09:04,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:04,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649723504] [2024-06-14 14:09:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:04,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:04,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:05,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:05,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649723504] [2024-06-14 14:09:05,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649723504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:05,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:05,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:05,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895838110] [2024-06-14 14:09:05,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:05,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:05,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:05,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:05,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:05,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:05,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 248 transitions, 2800 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:05,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:05,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:05,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:05,683 INFO L124 PetriNetUnfolderBase]: 1712/3040 cut-off events. [2024-06-14 14:09:05,683 INFO L125 PetriNetUnfolderBase]: For 123701/123701 co-relation queries the response was YES. [2024-06-14 14:09:05,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19003 conditions, 3040 events. 1712/3040 cut-off events. For 123701/123701 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19264 event pairs, 406 based on Foata normal form. 1/3033 useless extension candidates. Maximal degree in co-relation 18915. Up to 2551 conditions per place. [2024-06-14 14:09:05,711 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 205 selfloop transitions, 63 changer transitions 0/277 dead transitions. [2024-06-14 14:09:05,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 277 transitions, 3775 flow [2024-06-14 14:09:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:05,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:05,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:09:05,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-14 14:09:05,712 INFO L175 Difference]: Start difference. First operand has 206 places, 248 transitions, 2800 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:09:05,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 277 transitions, 3775 flow [2024-06-14 14:09:06,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 277 transitions, 3665 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 14:09:06,089 INFO L231 Difference]: Finished difference. Result has 210 places, 257 transitions, 2931 flow [2024-06-14 14:09:06,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2690, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2931, PETRI_PLACES=210, PETRI_TRANSITIONS=257} [2024-06-14 14:09:06,089 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 165 predicate places. [2024-06-14 14:09:06,089 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 257 transitions, 2931 flow [2024-06-14 14:09:06,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:06,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:06,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:06,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 14:09:06,090 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)] === [2024-06-14 14:09:06,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:06,091 INFO L85 PathProgramCache]: Analyzing trace with hash 190919289, now seen corresponding path program 3 times [2024-06-14 14:09:06,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:06,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030349515] [2024-06-14 14:09:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:06,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:06,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:06,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030349515] [2024-06-14 14:09:06,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030349515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:06,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:06,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:06,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861782956] [2024-06-14 14:09:06,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:06,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:06,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:06,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:06,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:06,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:06,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 257 transitions, 2931 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:06,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:06,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:06,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:06,988 INFO L124 PetriNetUnfolderBase]: 1709/3036 cut-off events. [2024-06-14 14:09:06,988 INFO L125 PetriNetUnfolderBase]: For 127333/127333 co-relation queries the response was YES. [2024-06-14 14:09:07,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19015 conditions, 3036 events. 1709/3036 cut-off events. For 127333/127333 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 19211 event pairs, 406 based on Foata normal form. 1/3029 useless extension candidates. Maximal degree in co-relation 18926. Up to 2548 conditions per place. [2024-06-14 14:09:07,026 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 202 selfloop transitions, 65 changer transitions 0/276 dead transitions. [2024-06-14 14:09:07,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 276 transitions, 3703 flow [2024-06-14 14:09:07,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:07,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:09:07,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-14 14:09:07,027 INFO L175 Difference]: Start difference. First operand has 210 places, 257 transitions, 2931 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:09:07,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 276 transitions, 3703 flow [2024-06-14 14:09:07,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 276 transitions, 3597 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 14:09:07,411 INFO L231 Difference]: Finished difference. Result has 215 places, 257 transitions, 2961 flow [2024-06-14 14:09:07,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2961, PETRI_PLACES=215, PETRI_TRANSITIONS=257} [2024-06-14 14:09:07,412 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-14 14:09:07,412 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 257 transitions, 2961 flow [2024-06-14 14:09:07,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:07,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:07,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:07,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 14:09:07,413 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)] === [2024-06-14 14:09:07,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:07,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1342906795, now seen corresponding path program 1 times [2024-06-14 14:09:07,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:07,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533966189] [2024-06-14 14:09:07,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:07,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:07,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:07,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:07,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:07,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533966189] [2024-06-14 14:09:07,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533966189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:07,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:07,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:07,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676132768] [2024-06-14 14:09:07,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:07,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:07,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:07,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:07,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:07,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:09:07,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 257 transitions, 2961 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:07,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:07,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:09:07,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:08,254 INFO L124 PetriNetUnfolderBase]: 1651/2973 cut-off events. [2024-06-14 14:09:08,255 INFO L125 PetriNetUnfolderBase]: For 143187/143187 co-relation queries the response was YES. [2024-06-14 14:09:08,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18893 conditions, 2973 events. 1651/2973 cut-off events. For 143187/143187 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19049 event pairs, 382 based on Foata normal form. 10/2958 useless extension candidates. Maximal degree in co-relation 18803. Up to 2392 conditions per place. [2024-06-14 14:09:08,283 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 202 selfloop transitions, 37 changer transitions 0/279 dead transitions. [2024-06-14 14:09:08,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 279 transitions, 3531 flow [2024-06-14 14:09:08,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:08,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:08,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:09:08,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-14 14:09:08,301 INFO L175 Difference]: Start difference. First operand has 215 places, 257 transitions, 2961 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:09:08,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 279 transitions, 3531 flow [2024-06-14 14:09:08,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 279 transitions, 3396 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:08,671 INFO L231 Difference]: Finished difference. Result has 217 places, 258 transitions, 2926 flow [2024-06-14 14:09:08,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2826, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2926, PETRI_PLACES=217, PETRI_TRANSITIONS=258} [2024-06-14 14:09:08,672 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-14 14:09:08,672 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 258 transitions, 2926 flow [2024-06-14 14:09:08,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:08,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:08,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:08,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 14:09:08,673 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)] === [2024-06-14 14:09:08,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:08,673 INFO L85 PathProgramCache]: Analyzing trace with hash 2055800121, now seen corresponding path program 6 times [2024-06-14 14:09:08,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:08,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172226639] [2024-06-14 14:09:08,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:08,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:09,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:09,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172226639] [2024-06-14 14:09:09,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172226639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:09,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:09,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:09,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161282983] [2024-06-14 14:09:09,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:09,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:09,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:09,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:09,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:09,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:09,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 258 transitions, 2926 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:09,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:09,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:09,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:09,640 INFO L124 PetriNetUnfolderBase]: 1750/3101 cut-off events. [2024-06-14 14:09:09,641 INFO L125 PetriNetUnfolderBase]: For 137813/137813 co-relation queries the response was YES. [2024-06-14 14:09:09,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19574 conditions, 3101 events. 1750/3101 cut-off events. For 137813/137813 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19710 event pairs, 410 based on Foata normal form. 1/3095 useless extension candidates. Maximal degree in co-relation 19483. Up to 2576 conditions per place. [2024-06-14 14:09:09,670 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 198 selfloop transitions, 87 changer transitions 0/294 dead transitions. [2024-06-14 14:09:09,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 294 transitions, 3811 flow [2024-06-14 14:09:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:09,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:09,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-14 14:09:09,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-14 14:09:09,671 INFO L175 Difference]: Start difference. First operand has 217 places, 258 transitions, 2926 flow. Second operand 9 states and 231 transitions. [2024-06-14 14:09:09,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 294 transitions, 3811 flow [2024-06-14 14:09:09,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 294 transitions, 3733 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:09,995 INFO L231 Difference]: Finished difference. Result has 221 places, 261 transitions, 3061 flow [2024-06-14 14:09:09,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2848, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3061, PETRI_PLACES=221, PETRI_TRANSITIONS=261} [2024-06-14 14:09:09,996 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 176 predicate places. [2024-06-14 14:09:09,996 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 261 transitions, 3061 flow [2024-06-14 14:09:09,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:09,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:09,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:09,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 14:09:09,997 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:09,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:09,997 INFO L85 PathProgramCache]: Analyzing trace with hash 2056186071, now seen corresponding path program 7 times [2024-06-14 14:09:09,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:09,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709882014] [2024-06-14 14:09:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:09,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:10,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:10,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:10,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709882014] [2024-06-14 14:09:10,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709882014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:10,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:10,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:10,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297952486] [2024-06-14 14:09:10,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:10,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:10,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:10,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:10,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:10,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:10,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 261 transitions, 3061 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:10,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:10,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:10,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:10,922 INFO L124 PetriNetUnfolderBase]: 1747/3097 cut-off events. [2024-06-14 14:09:10,922 INFO L125 PetriNetUnfolderBase]: For 141265/141265 co-relation queries the response was YES. [2024-06-14 14:09:10,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19657 conditions, 3097 events. 1747/3097 cut-off events. For 141265/141265 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19710 event pairs, 410 based on Foata normal form. 1/3091 useless extension candidates. Maximal degree in co-relation 19565. Up to 2573 conditions per place. [2024-06-14 14:09:10,952 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 199 selfloop transitions, 88 changer transitions 0/296 dead transitions. [2024-06-14 14:09:10,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 296 transitions, 3925 flow [2024-06-14 14:09:10,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:09:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:09:10,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2024-06-14 14:09:10,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5599173553719008 [2024-06-14 14:09:10,955 INFO L175 Difference]: Start difference. First operand has 221 places, 261 transitions, 3061 flow. Second operand 11 states and 271 transitions. [2024-06-14 14:09:10,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 296 transitions, 3925 flow [2024-06-14 14:09:11,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 296 transitions, 3670 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:11,231 INFO L231 Difference]: Finished difference. Result has 225 places, 261 transitions, 2988 flow [2024-06-14 14:09:11,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2806, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2988, PETRI_PLACES=225, PETRI_TRANSITIONS=261} [2024-06-14 14:09:11,231 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-14 14:09:11,231 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 261 transitions, 2988 flow [2024-06-14 14:09:11,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:11,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:11,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:11,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 14:09:11,232 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:11,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:11,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2103437903, now seen corresponding path program 8 times [2024-06-14 14:09:11,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:11,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210777070] [2024-06-14 14:09:11,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:11,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:11,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:11,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:11,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210777070] [2024-06-14 14:09:11,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210777070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:11,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:11,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:11,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236946104] [2024-06-14 14:09:11,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:11,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:11,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:11,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:11,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:11,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:11,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 261 transitions, 2988 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:11,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:11,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:11,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:12,159 INFO L124 PetriNetUnfolderBase]: 1752/3106 cut-off events. [2024-06-14 14:09:12,160 INFO L125 PetriNetUnfolderBase]: For 145827/145827 co-relation queries the response was YES. [2024-06-14 14:09:12,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19651 conditions, 3106 events. 1752/3106 cut-off events. For 145827/145827 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19735 event pairs, 410 based on Foata normal form. 1/3100 useless extension candidates. Maximal degree in co-relation 19559. Up to 2579 conditions per place. [2024-06-14 14:09:12,185 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 189 selfloop transitions, 93 changer transitions 0/291 dead transitions. [2024-06-14 14:09:12,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 291 transitions, 3751 flow [2024-06-14 14:09:12,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:12,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:12,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-14 14:09:12,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5522727272727272 [2024-06-14 14:09:12,187 INFO L175 Difference]: Start difference. First operand has 225 places, 261 transitions, 2988 flow. Second operand 10 states and 243 transitions. [2024-06-14 14:09:12,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 291 transitions, 3751 flow [2024-06-14 14:09:12,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 291 transitions, 3569 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 14:09:12,485 INFO L231 Difference]: Finished difference. Result has 226 places, 264 transitions, 3027 flow [2024-06-14 14:09:12,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2812, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3027, PETRI_PLACES=226, PETRI_TRANSITIONS=264} [2024-06-14 14:09:12,486 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-14 14:09:12,486 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 264 transitions, 3027 flow [2024-06-14 14:09:12,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:12,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:12,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:12,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 14:09:12,487 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:12,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:12,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1741368633, now seen corresponding path program 9 times [2024-06-14 14:09:12,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:12,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022824587] [2024-06-14 14:09:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:12,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:12,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:12,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022824587] [2024-06-14 14:09:12,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022824587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:12,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:12,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:12,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79190230] [2024-06-14 14:09:12,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:12,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:12,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:12,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:12,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:12,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:12,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 264 transitions, 3027 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:12,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:12,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:12,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:13,435 INFO L124 PetriNetUnfolderBase]: 1749/3097 cut-off events. [2024-06-14 14:09:13,435 INFO L125 PetriNetUnfolderBase]: For 149593/149593 co-relation queries the response was YES. [2024-06-14 14:09:13,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19676 conditions, 3097 events. 1749/3097 cut-off events. For 149593/149593 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19725 event pairs, 419 based on Foata normal form. 1/3089 useless extension candidates. Maximal degree in co-relation 19583. Up to 2576 conditions per place. [2024-06-14 14:09:13,467 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 186 selfloop transitions, 92 changer transitions 0/287 dead transitions. [2024-06-14 14:09:13,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 287 transitions, 3849 flow [2024-06-14 14:09:13,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:09:13,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:09:13,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 259 transitions. [2024-06-14 14:09:13,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5351239669421488 [2024-06-14 14:09:13,469 INFO L175 Difference]: Start difference. First operand has 226 places, 264 transitions, 3027 flow. Second operand 11 states and 259 transitions. [2024-06-14 14:09:13,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 287 transitions, 3849 flow [2024-06-14 14:09:13,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 287 transitions, 3687 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:13,796 INFO L231 Difference]: Finished difference. Result has 230 places, 264 transitions, 3055 flow [2024-06-14 14:09:13,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3055, PETRI_PLACES=230, PETRI_TRANSITIONS=264} [2024-06-14 14:09:13,796 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-14 14:09:13,796 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 264 transitions, 3055 flow [2024-06-14 14:09:13,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:13,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:13,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:13,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 14:09:13,797 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:13,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:13,797 INFO L85 PathProgramCache]: Analyzing trace with hash 2092727669, now seen corresponding path program 10 times [2024-06-14 14:09:13,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:13,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75654444] [2024-06-14 14:09:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:13,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:14,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:14,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75654444] [2024-06-14 14:09:14,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75654444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:14,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:14,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:14,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659050428] [2024-06-14 14:09:14,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:14,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:14,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:14,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:14,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:14,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:14,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 264 transitions, 3055 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:14,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:14,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:14,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:14,690 INFO L124 PetriNetUnfolderBase]: 1746/3095 cut-off events. [2024-06-14 14:09:14,690 INFO L125 PetriNetUnfolderBase]: For 152824/152824 co-relation queries the response was YES. [2024-06-14 14:09:14,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19709 conditions, 3095 events. 1746/3095 cut-off events. For 152824/152824 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19701 event pairs, 414 based on Foata normal form. 1/3088 useless extension candidates. Maximal degree in co-relation 19615. Up to 2679 conditions per place. [2024-06-14 14:09:14,719 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 238 selfloop transitions, 27 changer transitions 0/274 dead transitions. [2024-06-14 14:09:14,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 274 transitions, 3609 flow [2024-06-14 14:09:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:14,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:14,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 14:09:14,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643939393939394 [2024-06-14 14:09:14,720 INFO L175 Difference]: Start difference. First operand has 230 places, 264 transitions, 3055 flow. Second operand 6 states and 149 transitions. [2024-06-14 14:09:14,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 274 transitions, 3609 flow [2024-06-14 14:09:15,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 274 transitions, 3365 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-14 14:09:15,118 INFO L231 Difference]: Finished difference. Result has 226 places, 264 transitions, 2875 flow [2024-06-14 14:09:15,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2811, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2875, PETRI_PLACES=226, PETRI_TRANSITIONS=264} [2024-06-14 14:09:15,119 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 181 predicate places. [2024-06-14 14:09:15,119 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 264 transitions, 2875 flow [2024-06-14 14:09:15,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:15,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:15,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:15,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 14:09:15,120 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:15,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:15,120 INFO L85 PathProgramCache]: Analyzing trace with hash -86188683, now seen corresponding path program 11 times [2024-06-14 14:09:15,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:15,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767712622] [2024-06-14 14:09:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:15,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:15,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:15,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767712622] [2024-06-14 14:09:15,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767712622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:15,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:15,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:15,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351658785] [2024-06-14 14:09:15,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:15,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:15,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:15,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:15,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:15,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:15,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 264 transitions, 2875 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:15,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:15,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:15,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:15,997 INFO L124 PetriNetUnfolderBase]: 1743/3089 cut-off events. [2024-06-14 14:09:15,997 INFO L125 PetriNetUnfolderBase]: For 155544/155544 co-relation queries the response was YES. [2024-06-14 14:09:16,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19503 conditions, 3089 events. 1743/3089 cut-off events. For 155544/155544 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19646 event pairs, 419 based on Foata normal form. 1/3081 useless extension candidates. Maximal degree in co-relation 19409. Up to 2570 conditions per place. [2024-06-14 14:09:16,024 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 182 selfloop transitions, 93 changer transitions 0/284 dead transitions. [2024-06-14 14:09:16,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 284 transitions, 3473 flow [2024-06-14 14:09:16,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:09:16,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:09:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-14 14:09:16,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-14 14:09:16,026 INFO L175 Difference]: Start difference. First operand has 226 places, 264 transitions, 2875 flow. Second operand 10 states and 236 transitions. [2024-06-14 14:09:16,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 284 transitions, 3473 flow [2024-06-14 14:09:16,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 284 transitions, 3409 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:16,381 INFO L231 Difference]: Finished difference. Result has 230 places, 264 transitions, 3003 flow [2024-06-14 14:09:16,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2811, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3003, PETRI_PLACES=230, PETRI_TRANSITIONS=264} [2024-06-14 14:09:16,381 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-14 14:09:16,381 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 264 transitions, 3003 flow [2024-06-14 14:09:16,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:16,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:16,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:16,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 14:09:16,382 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:16,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2092724693, now seen corresponding path program 3 times [2024-06-14 14:09:16,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:16,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405144863] [2024-06-14 14:09:16,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:16,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:16,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:16,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405144863] [2024-06-14 14:09:16,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405144863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:16,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:16,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:09:16,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532467356] [2024-06-14 14:09:16,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:16,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:09:16,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:16,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:09:16,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:09:16,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:16,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 264 transitions, 3003 flow. Second operand has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:16,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:16,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:16,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:17,334 INFO L124 PetriNetUnfolderBase]: 1738/3084 cut-off events. [2024-06-14 14:09:17,335 INFO L125 PetriNetUnfolderBase]: For 154322/154322 co-relation queries the response was YES. [2024-06-14 14:09:17,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19521 conditions, 3084 events. 1738/3084 cut-off events. For 154322/154322 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 19619 event pairs, 413 based on Foata normal form. 2/3078 useless extension candidates. Maximal degree in co-relation 19427. Up to 2668 conditions per place. [2024-06-14 14:09:17,376 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 243 selfloop transitions, 23 changer transitions 0/275 dead transitions. [2024-06-14 14:09:17,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 275 transitions, 3561 flow [2024-06-14 14:09:17,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 14:09:17,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 14:09:17,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 14:09:17,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-14 14:09:17,377 INFO L175 Difference]: Start difference. First operand has 230 places, 264 transitions, 3003 flow. Second operand 6 states and 148 transitions. [2024-06-14 14:09:17,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 275 transitions, 3561 flow [2024-06-14 14:09:17,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 275 transitions, 3372 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 14:09:17,902 INFO L231 Difference]: Finished difference. Result has 228 places, 264 transitions, 2865 flow [2024-06-14 14:09:17,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2814, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2865, PETRI_PLACES=228, PETRI_TRANSITIONS=264} [2024-06-14 14:09:17,903 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 183 predicate places. [2024-06-14 14:09:17,903 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 264 transitions, 2865 flow [2024-06-14 14:09:17,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.77777777777778) internal successors, (160), 9 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:17,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:17,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:17,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 14:09:17,903 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:17,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:17,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1743050603, now seen corresponding path program 4 times [2024-06-14 14:09:17,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:17,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674894747] [2024-06-14 14:09:17,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:17,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:18,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:18,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674894747] [2024-06-14 14:09:18,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674894747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:18,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:18,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:18,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138716507] [2024-06-14 14:09:18,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:18,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:18,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:18,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:18,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:18,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:18,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 264 transitions, 2865 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:18,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:18,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:18,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:18,773 INFO L124 PetriNetUnfolderBase]: 1743/3098 cut-off events. [2024-06-14 14:09:18,773 INFO L125 PetriNetUnfolderBase]: For 157099/157099 co-relation queries the response was YES. [2024-06-14 14:09:18,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19486 conditions, 3098 events. 1743/3098 cut-off events. For 157099/157099 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19742 event pairs, 406 based on Foata normal form. 1/3094 useless extension candidates. Maximal degree in co-relation 19391. Up to 2647 conditions per place. [2024-06-14 14:09:18,801 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 250 selfloop transitions, 28 changer transitions 0/287 dead transitions. [2024-06-14 14:09:18,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 287 transitions, 3514 flow [2024-06-14 14:09:18,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:18,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:09:18,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:09:18,803 INFO L175 Difference]: Start difference. First operand has 228 places, 264 transitions, 2865 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:09:18,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 287 transitions, 3514 flow [2024-06-14 14:09:19,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 287 transitions, 3456 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:19,115 INFO L231 Difference]: Finished difference. Result has 230 places, 267 transitions, 2918 flow [2024-06-14 14:09:19,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2807, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2918, PETRI_PLACES=230, PETRI_TRANSITIONS=267} [2024-06-14 14:09:19,115 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 185 predicate places. [2024-06-14 14:09:19,115 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 267 transitions, 2918 flow [2024-06-14 14:09:19,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:19,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:19,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:19,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 14:09:19,116 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:19,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:19,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1738289003, now seen corresponding path program 5 times [2024-06-14 14:09:19,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:19,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986429882] [2024-06-14 14:09:19,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:19,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:19,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:19,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:19,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986429882] [2024-06-14 14:09:19,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986429882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:19,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:19,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:19,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276252286] [2024-06-14 14:09:19,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:19,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:19,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:19,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:19,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:19,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:19,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 267 transitions, 2918 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:19,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:19,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:19,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:19,967 INFO L124 PetriNetUnfolderBase]: 1748/3105 cut-off events. [2024-06-14 14:09:19,968 INFO L125 PetriNetUnfolderBase]: For 162528/162528 co-relation queries the response was YES. [2024-06-14 14:09:19,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19661 conditions, 3105 events. 1748/3105 cut-off events. For 162528/162528 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19812 event pairs, 409 based on Foata normal form. 1/3099 useless extension candidates. Maximal degree in co-relation 19565. Up to 2580 conditions per place. [2024-06-14 14:09:20,000 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 207 selfloop transitions, 74 changer transitions 0/290 dead transitions. [2024-06-14 14:09:20,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 290 transitions, 3919 flow [2024-06-14 14:09:20,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:20,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 14:09:20,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2024-06-14 14:09:20,005 INFO L175 Difference]: Start difference. First operand has 230 places, 267 transitions, 2918 flow. Second operand 7 states and 180 transitions. [2024-06-14 14:09:20,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 290 transitions, 3919 flow [2024-06-14 14:09:20,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 290 transitions, 3839 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:20,442 INFO L231 Difference]: Finished difference. Result has 232 places, 270 transitions, 3041 flow [2024-06-14 14:09:20,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2838, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3041, PETRI_PLACES=232, PETRI_TRANSITIONS=270} [2024-06-14 14:09:20,442 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 187 predicate places. [2024-06-14 14:09:20,442 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 270 transitions, 3041 flow [2024-06-14 14:09:20,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:20,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:20,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:20,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 14:09:20,443 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:20,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash 850006173, now seen corresponding path program 6 times [2024-06-14 14:09:20,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:20,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040066898] [2024-06-14 14:09:20,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:20,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:20,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:20,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040066898] [2024-06-14 14:09:20,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040066898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:20,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:20,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:20,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850777679] [2024-06-14 14:09:20,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:20,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:20,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:20,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:20,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:20,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:20,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 270 transitions, 3041 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:20,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:20,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:20,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:21,292 INFO L124 PetriNetUnfolderBase]: 1753/3116 cut-off events. [2024-06-14 14:09:21,292 INFO L125 PetriNetUnfolderBase]: For 167971/167971 co-relation queries the response was YES. [2024-06-14 14:09:21,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19896 conditions, 3116 events. 1753/3116 cut-off events. For 167971/167971 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19888 event pairs, 406 based on Foata normal form. 1/3112 useless extension candidates. Maximal degree in co-relation 19799. Up to 2648 conditions per place. [2024-06-14 14:09:21,321 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 247 selfloop transitions, 41 changer transitions 0/297 dead transitions. [2024-06-14 14:09:21,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 297 transitions, 3859 flow [2024-06-14 14:09:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:21,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:21,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-06-14 14:09:21,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.547979797979798 [2024-06-14 14:09:21,322 INFO L175 Difference]: Start difference. First operand has 232 places, 270 transitions, 3041 flow. Second operand 9 states and 217 transitions. [2024-06-14 14:09:21,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 297 transitions, 3859 flow [2024-06-14 14:09:21,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 297 transitions, 3642 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:21,785 INFO L231 Difference]: Finished difference. Result has 239 places, 274 transitions, 3006 flow [2024-06-14 14:09:21,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3006, PETRI_PLACES=239, PETRI_TRANSITIONS=274} [2024-06-14 14:09:21,786 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 194 predicate places. [2024-06-14 14:09:21,786 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 274 transitions, 3006 flow [2024-06-14 14:09:21,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:21,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:21,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:21,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 14:09:21,786 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:21,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:21,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1512974183, now seen corresponding path program 7 times [2024-06-14 14:09:21,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:21,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654662328] [2024-06-14 14:09:21,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:21,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:22,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:22,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654662328] [2024-06-14 14:09:22,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654662328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:22,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:22,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:22,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378276635] [2024-06-14 14:09:22,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:22,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:22,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:22,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:22,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:22,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:22,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 274 transitions, 3006 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:22,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:22,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:22,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:22,825 INFO L124 PetriNetUnfolderBase]: 1750/3112 cut-off events. [2024-06-14 14:09:22,825 INFO L125 PetriNetUnfolderBase]: For 170778/170778 co-relation queries the response was YES. [2024-06-14 14:09:22,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19788 conditions, 3112 events. 1750/3112 cut-off events. For 170778/170778 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19886 event pairs, 406 based on Foata normal form. 1/3108 useless extension candidates. Maximal degree in co-relation 19688. Up to 2645 conditions per place. [2024-06-14 14:09:22,855 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 242 selfloop transitions, 40 changer transitions 0/291 dead transitions. [2024-06-14 14:09:22,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 291 transitions, 3612 flow [2024-06-14 14:09:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:09:22,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-14 14:09:22,857 INFO L175 Difference]: Start difference. First operand has 239 places, 274 transitions, 3006 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:09:22,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 291 transitions, 3612 flow [2024-06-14 14:09:23,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 291 transitions, 3492 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:23,286 INFO L231 Difference]: Finished difference. Result has 240 places, 274 transitions, 2972 flow [2024-06-14 14:09:23,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2972, PETRI_PLACES=240, PETRI_TRANSITIONS=274} [2024-06-14 14:09:23,287 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 195 predicate places. [2024-06-14 14:09:23,287 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 274 transitions, 2972 flow [2024-06-14 14:09:23,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:23,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:23,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:23,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 14:09:23,288 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:23,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:23,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1967745865, now seen corresponding path program 8 times [2024-06-14 14:09:23,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:23,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450839779] [2024-06-14 14:09:23,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:23,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:23,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:23,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:23,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450839779] [2024-06-14 14:09:23,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450839779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:23,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:23,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:23,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768405948] [2024-06-14 14:09:23,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:23,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:23,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:23,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:23,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:23,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:23,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 274 transitions, 2972 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:23,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:23,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:23,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:24,089 INFO L124 PetriNetUnfolderBase]: 1763/3132 cut-off events. [2024-06-14 14:09:24,089 INFO L125 PetriNetUnfolderBase]: For 178070/178070 co-relation queries the response was YES. [2024-06-14 14:09:24,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20038 conditions, 3132 events. 1763/3132 cut-off events. For 178070/178070 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20067 event pairs, 409 based on Foata normal form. 1/3126 useless extension candidates. Maximal degree in co-relation 19937. Up to 2598 conditions per place. [2024-06-14 14:09:24,120 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 202 selfloop transitions, 86 changer transitions 0/297 dead transitions. [2024-06-14 14:09:24,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 297 transitions, 3940 flow [2024-06-14 14:09:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 14:09:24,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 14:09:24,121 INFO L175 Difference]: Start difference. First operand has 240 places, 274 transitions, 2972 flow. Second operand 7 states and 176 transitions. [2024-06-14 14:09:24,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 297 transitions, 3940 flow [2024-06-14 14:09:24,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 297 transitions, 3860 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:24,673 INFO L231 Difference]: Finished difference. Result has 241 places, 281 transitions, 3184 flow [2024-06-14 14:09:24,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2892, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3184, PETRI_PLACES=241, PETRI_TRANSITIONS=281} [2024-06-14 14:09:24,674 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 196 predicate places. [2024-06-14 14:09:24,674 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 281 transitions, 3184 flow [2024-06-14 14:09:24,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:24,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:24,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:24,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 14:09:24,675 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:24,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:24,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1365603593, now seen corresponding path program 9 times [2024-06-14 14:09:24,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:24,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843804937] [2024-06-14 14:09:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:24,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:25,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:25,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843804937] [2024-06-14 14:09:25,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843804937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:25,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:25,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:25,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276991501] [2024-06-14 14:09:25,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:25,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:25,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:25,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:25,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:25,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 281 transitions, 3184 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:25,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:25,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:25,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:25,496 INFO L124 PetriNetUnfolderBase]: 1760/3128 cut-off events. [2024-06-14 14:09:25,497 INFO L125 PetriNetUnfolderBase]: For 181937/181937 co-relation queries the response was YES. [2024-06-14 14:09:25,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20132 conditions, 3128 events. 1760/3128 cut-off events. For 181937/181937 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19993 event pairs, 409 based on Foata normal form. 1/3122 useless extension candidates. Maximal degree in co-relation 20030. Up to 2595 conditions per place. [2024-06-14 14:09:25,527 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 202 selfloop transitions, 85 changer transitions 0/296 dead transitions. [2024-06-14 14:09:25,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 296 transitions, 3916 flow [2024-06-14 14:09:25,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:09:25,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:09:25,528 INFO L175 Difference]: Start difference. First operand has 241 places, 281 transitions, 3184 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:09:25,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 296 transitions, 3916 flow [2024-06-14 14:09:26,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 296 transitions, 3701 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:26,269 INFO L231 Difference]: Finished difference. Result has 243 places, 281 transitions, 3145 flow [2024-06-14 14:09:26,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3145, PETRI_PLACES=243, PETRI_TRANSITIONS=281} [2024-06-14 14:09:26,270 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-14 14:09:26,270 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 281 transitions, 3145 flow [2024-06-14 14:09:26,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:26,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:26,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:26,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 14:09:26,271 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:26,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:26,271 INFO L85 PathProgramCache]: Analyzing trace with hash 311634251, now seen corresponding path program 4 times [2024-06-14 14:09:26,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:26,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682857267] [2024-06-14 14:09:26,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:26,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:26,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:26,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:26,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682857267] [2024-06-14 14:09:26,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682857267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:26,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:26,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:26,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201429793] [2024-06-14 14:09:26,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:26,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:26,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:26,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:26,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:26,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:26,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 281 transitions, 3145 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:26,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:26,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:26,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:27,100 INFO L124 PetriNetUnfolderBase]: 1757/3122 cut-off events. [2024-06-14 14:09:27,101 INFO L125 PetriNetUnfolderBase]: For 185522/185522 co-relation queries the response was YES. [2024-06-14 14:09:27,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20050 conditions, 3122 events. 1757/3122 cut-off events. For 185522/185522 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 19954 event pairs, 413 based on Foata normal form. 1/3114 useless extension candidates. Maximal degree in co-relation 19949. Up to 2623 conditions per place. [2024-06-14 14:09:27,131 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 226 selfloop transitions, 67 changer transitions 0/302 dead transitions. [2024-06-14 14:09:27,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 302 transitions, 4060 flow [2024-06-14 14:09:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:27,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:09:27,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-14 14:09:27,133 INFO L175 Difference]: Start difference. First operand has 243 places, 281 transitions, 3145 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:09:27,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 302 transitions, 4060 flow [2024-06-14 14:09:27,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 302 transitions, 3908 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:27,559 INFO L231 Difference]: Finished difference. Result has 246 places, 283 transitions, 3168 flow [2024-06-14 14:09:27,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3001, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3168, PETRI_PLACES=246, PETRI_TRANSITIONS=283} [2024-06-14 14:09:27,560 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-14 14:09:27,560 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 283 transitions, 3168 flow [2024-06-14 14:09:27,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:27,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:27,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:27,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 14:09:27,561 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:27,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:27,561 INFO L85 PathProgramCache]: Analyzing trace with hash -536065479, now seen corresponding path program 5 times [2024-06-14 14:09:27,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:27,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113063558] [2024-06-14 14:09:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:27,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:27,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:27,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:27,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113063558] [2024-06-14 14:09:27,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113063558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:27,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:27,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:27,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755895557] [2024-06-14 14:09:27,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:27,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:27,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:27,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:27,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:27,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:27,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 283 transitions, 3168 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:27,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:27,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:27,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:28,363 INFO L124 PetriNetUnfolderBase]: 1770/3144 cut-off events. [2024-06-14 14:09:28,363 INFO L125 PetriNetUnfolderBase]: For 192988/192988 co-relation queries the response was YES. [2024-06-14 14:09:28,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20309 conditions, 3144 events. 1770/3144 cut-off events. For 192988/192988 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20120 event pairs, 413 based on Foata normal form. 1/3136 useless extension candidates. Maximal degree in co-relation 20207. Up to 2638 conditions per place. [2024-06-14 14:09:28,392 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 224 selfloop transitions, 72 changer transitions 0/305 dead transitions. [2024-06-14 14:09:28,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 305 transitions, 4150 flow [2024-06-14 14:09:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:28,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:28,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:09:28,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746753246753247 [2024-06-14 14:09:28,394 INFO L175 Difference]: Start difference. First operand has 246 places, 283 transitions, 3168 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:09:28,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 305 transitions, 4150 flow [2024-06-14 14:09:28,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 305 transitions, 4032 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 14:09:28,889 INFO L231 Difference]: Finished difference. Result has 250 places, 289 transitions, 3300 flow [2024-06-14 14:09:28,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3060, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3300, PETRI_PLACES=250, PETRI_TRANSITIONS=289} [2024-06-14 14:09:28,890 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 205 predicate places. [2024-06-14 14:09:28,890 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 289 transitions, 3300 flow [2024-06-14 14:09:28,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:28,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:28,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:28,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 14:09:28,891 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:28,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:28,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1795433547, now seen corresponding path program 6 times [2024-06-14 14:09:28,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:28,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446471084] [2024-06-14 14:09:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:28,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:28,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:29,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:29,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446471084] [2024-06-14 14:09:29,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446471084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:29,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:29,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:29,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204564694] [2024-06-14 14:09:29,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:29,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:29,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:29,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:29,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:29,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:29,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 289 transitions, 3300 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:29,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:29,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:29,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:29,778 INFO L124 PetriNetUnfolderBase]: 1767/3147 cut-off events. [2024-06-14 14:09:29,778 INFO L125 PetriNetUnfolderBase]: For 196576/196576 co-relation queries the response was YES. [2024-06-14 14:09:29,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20302 conditions, 3147 events. 1767/3147 cut-off events. For 196576/196576 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20129 event pairs, 401 based on Foata normal form. 1/3144 useless extension candidates. Maximal degree in co-relation 20198. Up to 2730 conditions per place. [2024-06-14 14:09:29,806 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 269 selfloop transitions, 25 changer transitions 0/303 dead transitions. [2024-06-14 14:09:29,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 303 transitions, 3922 flow [2024-06-14 14:09:29,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:09:29,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-14 14:09:29,807 INFO L175 Difference]: Start difference. First operand has 250 places, 289 transitions, 3300 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:09:29,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 303 transitions, 3922 flow [2024-06-14 14:09:30,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 303 transitions, 3788 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 14:09:30,294 INFO L231 Difference]: Finished difference. Result has 254 places, 289 transitions, 3222 flow [2024-06-14 14:09:30,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3166, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3222, PETRI_PLACES=254, PETRI_TRANSITIONS=289} [2024-06-14 14:09:30,295 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-14 14:09:30,295 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 289 transitions, 3222 flow [2024-06-14 14:09:30,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:30,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:30,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:30,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 14:09:30,295 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:30,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:30,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1746017207, now seen corresponding path program 10 times [2024-06-14 14:09:30,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:30,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904472965] [2024-06-14 14:09:30,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:30,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:30,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:30,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904472965] [2024-06-14 14:09:30,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904472965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:30,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:30,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:30,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825496502] [2024-06-14 14:09:30,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:30,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:30,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:30,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:30,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:30,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:30,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 289 transitions, 3222 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:30,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:30,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:30,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:31,128 INFO L124 PetriNetUnfolderBase]: 1764/3127 cut-off events. [2024-06-14 14:09:31,128 INFO L125 PetriNetUnfolderBase]: For 200444/200444 co-relation queries the response was YES. [2024-06-14 14:09:31,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20164 conditions, 3127 events. 1764/3127 cut-off events. For 200444/200444 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20044 event pairs, 434 based on Foata normal form. 1/3115 useless extension candidates. Maximal degree in co-relation 20059. Up to 2602 conditions per place. [2024-06-14 14:09:31,158 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 206 selfloop transitions, 86 changer transitions 0/301 dead transitions. [2024-06-14 14:09:31,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 301 transitions, 3964 flow [2024-06-14 14:09:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:31,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:31,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:09:31,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-14 14:09:31,159 INFO L175 Difference]: Start difference. First operand has 254 places, 289 transitions, 3222 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:09:31,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 301 transitions, 3964 flow [2024-06-14 14:09:31,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 301 transitions, 3848 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 14:09:31,720 INFO L231 Difference]: Finished difference. Result has 254 places, 289 transitions, 3284 flow [2024-06-14 14:09:31,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3284, PETRI_PLACES=254, PETRI_TRANSITIONS=289} [2024-06-14 14:09:31,720 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 209 predicate places. [2024-06-14 14:09:31,721 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 289 transitions, 3284 flow [2024-06-14 14:09:31,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:31,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:31,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:31,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 14:09:31,721 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:31,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:31,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2023224797, now seen corresponding path program 11 times [2024-06-14 14:09:31,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:31,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047237411] [2024-06-14 14:09:31,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:31,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:32,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:32,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047237411] [2024-06-14 14:09:32,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047237411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:32,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:32,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:32,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149802853] [2024-06-14 14:09:32,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:32,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:32,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:32,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:32,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:32,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:32,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 289 transitions, 3284 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:32,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:32,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:32,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:32,519 INFO L124 PetriNetUnfolderBase]: 1769/3136 cut-off events. [2024-06-14 14:09:32,520 INFO L125 PetriNetUnfolderBase]: For 206495/206495 co-relation queries the response was YES. [2024-06-14 14:09:32,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20407 conditions, 3136 events. 1769/3136 cut-off events. For 206495/206495 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20112 event pairs, 434 based on Foata normal form. 1/3124 useless extension candidates. Maximal degree in co-relation 20301. Up to 2608 conditions per place. [2024-06-14 14:09:32,552 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 208 selfloop transitions, 87 changer transitions 0/304 dead transitions. [2024-06-14 14:09:32,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 304 transitions, 4088 flow [2024-06-14 14:09:32,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:32,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:09:32,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-14 14:09:32,553 INFO L175 Difference]: Start difference. First operand has 254 places, 289 transitions, 3284 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:09:32,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 304 transitions, 4088 flow [2024-06-14 14:09:33,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 304 transitions, 3898 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:33,113 INFO L231 Difference]: Finished difference. Result has 256 places, 292 transitions, 3328 flow [2024-06-14 14:09:33,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3328, PETRI_PLACES=256, PETRI_TRANSITIONS=292} [2024-06-14 14:09:33,115 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 211 predicate places. [2024-06-14 14:09:33,115 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 292 transitions, 3328 flow [2024-06-14 14:09:33,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:33,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:33,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:33,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 14:09:33,116 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:33,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:33,116 INFO L85 PathProgramCache]: Analyzing trace with hash -85942729, now seen corresponding path program 12 times [2024-06-14 14:09:33,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:33,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223383489] [2024-06-14 14:09:33,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:33,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:33,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:33,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:33,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223383489] [2024-06-14 14:09:33,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223383489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:33,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:33,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:33,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024922080] [2024-06-14 14:09:33,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:33,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:33,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:33,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:33,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:33,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:33,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 292 transitions, 3328 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:33,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:33,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:33,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:33,971 INFO L124 PetriNetUnfolderBase]: 1766/3132 cut-off events. [2024-06-14 14:09:33,971 INFO L125 PetriNetUnfolderBase]: For 209332/209332 co-relation queries the response was YES. [2024-06-14 14:09:33,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20366 conditions, 3132 events. 1766/3132 cut-off events. For 209332/209332 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20121 event pairs, 434 based on Foata normal form. 1/3120 useless extension candidates. Maximal degree in co-relation 20259. Up to 2605 conditions per place. [2024-06-14 14:09:34,002 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 205 selfloop transitions, 89 changer transitions 0/303 dead transitions. [2024-06-14 14:09:34,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 303 transitions, 3942 flow [2024-06-14 14:09:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:34,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:34,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:09:34,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5551948051948052 [2024-06-14 14:09:34,003 INFO L175 Difference]: Start difference. First operand has 256 places, 292 transitions, 3328 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:09:34,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 303 transitions, 3942 flow [2024-06-14 14:09:34,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 303 transitions, 3652 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:34,844 INFO L231 Difference]: Finished difference. Result has 257 places, 292 transitions, 3222 flow [2024-06-14 14:09:34,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3038, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3222, PETRI_PLACES=257, PETRI_TRANSITIONS=292} [2024-06-14 14:09:34,844 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 212 predicate places. [2024-06-14 14:09:34,844 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 292 transitions, 3222 flow [2024-06-14 14:09:34,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:34,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:34,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:34,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 14:09:34,845 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:34,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:34,845 INFO L85 PathProgramCache]: Analyzing trace with hash -86174795, now seen corresponding path program 7 times [2024-06-14 14:09:34,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:34,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348919211] [2024-06-14 14:09:34,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:34,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:35,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:35,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348919211] [2024-06-14 14:09:35,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348919211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:35,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:35,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:35,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965752319] [2024-06-14 14:09:35,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:35,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:35,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:35,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:35,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:35,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:35,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 292 transitions, 3222 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:35,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:35,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:35,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:35,945 INFO L124 PetriNetUnfolderBase]: 1771/3147 cut-off events. [2024-06-14 14:09:35,946 INFO L125 PetriNetUnfolderBase]: For 214160/214160 co-relation queries the response was YES. [2024-06-14 14:09:35,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20441 conditions, 3147 events. 1771/3147 cut-off events. For 214160/214160 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 20217 event pairs, 418 based on Foata normal form. 1/3139 useless extension candidates. Maximal degree in co-relation 20333. Up to 2640 conditions per place. [2024-06-14 14:09:35,995 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 224 selfloop transitions, 75 changer transitions 0/308 dead transitions. [2024-06-14 14:09:35,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 308 transitions, 4170 flow [2024-06-14 14:09:35,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:35,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:35,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:09:35,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-14 14:09:35,997 INFO L175 Difference]: Start difference. First operand has 257 places, 292 transitions, 3222 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:09:35,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 308 transitions, 4170 flow [2024-06-14 14:09:37,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 308 transitions, 3994 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:37,190 INFO L231 Difference]: Finished difference. Result has 259 places, 295 transitions, 3250 flow [2024-06-14 14:09:37,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3046, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3250, PETRI_PLACES=259, PETRI_TRANSITIONS=295} [2024-06-14 14:09:37,191 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 214 predicate places. [2024-06-14 14:09:37,191 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 295 transitions, 3250 flow [2024-06-14 14:09:37,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:37,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:37,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:37,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 14:09:37,192 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:37,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:37,192 INFO L85 PathProgramCache]: Analyzing trace with hash -70937675, now seen corresponding path program 8 times [2024-06-14 14:09:37,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:37,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777723922] [2024-06-14 14:09:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:37,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:37,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:37,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:37,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777723922] [2024-06-14 14:09:37,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777723922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:37,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:37,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:37,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841164655] [2024-06-14 14:09:37,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:37,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:37,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:37,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:37,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:37,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:37,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 295 transitions, 3250 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:37,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:37,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:37,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:38,270 INFO L124 PetriNetUnfolderBase]: 1781/3174 cut-off events. [2024-06-14 14:09:38,270 INFO L125 PetriNetUnfolderBase]: For 219716/219716 co-relation queries the response was YES. [2024-06-14 14:09:38,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20617 conditions, 3174 events. 1781/3174 cut-off events. For 219716/219716 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 20391 event pairs, 403 based on Foata normal form. 1/3171 useless extension candidates. Maximal degree in co-relation 20508. Up to 2749 conditions per place. [2024-06-14 14:09:38,302 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 275 selfloop transitions, 28 changer transitions 0/312 dead transitions. [2024-06-14 14:09:38,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 312 transitions, 3973 flow [2024-06-14 14:09:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:38,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:38,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:09:38,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-14 14:09:38,303 INFO L175 Difference]: Start difference. First operand has 259 places, 295 transitions, 3250 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:09:38,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 312 transitions, 3973 flow [2024-06-14 14:09:38,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 312 transitions, 3786 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:38,932 INFO L231 Difference]: Finished difference. Result has 262 places, 301 transitions, 3222 flow [2024-06-14 14:09:38,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3081, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3222, PETRI_PLACES=262, PETRI_TRANSITIONS=301} [2024-06-14 14:09:38,933 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-14 14:09:38,933 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 301 transitions, 3222 flow [2024-06-14 14:09:38,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:38,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:38,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:38,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 14:09:38,934 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:38,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:38,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2106074037, now seen corresponding path program 9 times [2024-06-14 14:09:38,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:38,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114707833] [2024-06-14 14:09:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:38,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:39,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:39,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114707833] [2024-06-14 14:09:39,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114707833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:39,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:39,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:39,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029713938] [2024-06-14 14:09:39,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:39,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:39,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:39,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:39,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:39,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 301 transitions, 3222 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:39,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:39,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:39,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:39,729 INFO L124 PetriNetUnfolderBase]: 1794/3187 cut-off events. [2024-06-14 14:09:39,730 INFO L125 PetriNetUnfolderBase]: For 227666/227666 co-relation queries the response was YES. [2024-06-14 14:09:39,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20712 conditions, 3187 events. 1794/3187 cut-off events. For 227666/227666 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20503 event pairs, 418 based on Foata normal form. 1/3179 useless extension candidates. Maximal degree in co-relation 20602. Up to 2665 conditions per place. [2024-06-14 14:09:39,762 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 223 selfloop transitions, 89 changer transitions 0/321 dead transitions. [2024-06-14 14:09:39,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 321 transitions, 4244 flow [2024-06-14 14:09:39,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:39,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:39,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:09:39,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-14 14:09:39,763 INFO L175 Difference]: Start difference. First operand has 262 places, 301 transitions, 3222 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:09:39,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 321 transitions, 4244 flow [2024-06-14 14:09:40,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 321 transitions, 4170 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:40,658 INFO L231 Difference]: Finished difference. Result has 265 places, 308 transitions, 3420 flow [2024-06-14 14:09:40,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3420, PETRI_PLACES=265, PETRI_TRANSITIONS=308} [2024-06-14 14:09:40,659 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 220 predicate places. [2024-06-14 14:09:40,664 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 308 transitions, 3420 flow [2024-06-14 14:09:40,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:40,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:40,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:40,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 14:09:40,665 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:40,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:40,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2097503157, now seen corresponding path program 10 times [2024-06-14 14:09:40,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:40,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605782911] [2024-06-14 14:09:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:40,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:40,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:40,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:40,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605782911] [2024-06-14 14:09:40,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605782911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:40,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:40,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:40,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301464117] [2024-06-14 14:09:40,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:40,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:40,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:40,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:40,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:41,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:41,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 308 transitions, 3420 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:41,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:41,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:41,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:41,483 INFO L124 PetriNetUnfolderBase]: 1791/3183 cut-off events. [2024-06-14 14:09:41,483 INFO L125 PetriNetUnfolderBase]: For 231584/231584 co-relation queries the response was YES. [2024-06-14 14:09:41,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20829 conditions, 3183 events. 1791/3183 cut-off events. For 231584/231584 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20529 event pairs, 418 based on Foata normal form. 1/3175 useless extension candidates. Maximal degree in co-relation 20718. Up to 2662 conditions per place. [2024-06-14 14:09:41,517 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 224 selfloop transitions, 88 changer transitions 0/321 dead transitions. [2024-06-14 14:09:41,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 321 transitions, 4358 flow [2024-06-14 14:09:41,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:41,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:41,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 14:09:41,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5616883116883117 [2024-06-14 14:09:41,518 INFO L175 Difference]: Start difference. First operand has 265 places, 308 transitions, 3420 flow. Second operand 7 states and 173 transitions. [2024-06-14 14:09:41,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 321 transitions, 4358 flow [2024-06-14 14:09:42,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 321 transitions, 4136 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:42,348 INFO L231 Difference]: Finished difference. Result has 268 places, 308 transitions, 3380 flow [2024-06-14 14:09:42,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3198, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3380, PETRI_PLACES=268, PETRI_TRANSITIONS=308} [2024-06-14 14:09:42,349 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 223 predicate places. [2024-06-14 14:09:42,349 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 308 transitions, 3380 flow [2024-06-14 14:09:42,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:42,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:42,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:42,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 14:09:42,350 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:42,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:42,350 INFO L85 PathProgramCache]: Analyzing trace with hash -424256587, now seen corresponding path program 11 times [2024-06-14 14:09:42,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:42,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550087075] [2024-06-14 14:09:42,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:42,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:42,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:42,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:42,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550087075] [2024-06-14 14:09:42,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550087075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:42,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:42,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:42,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41031003] [2024-06-14 14:09:42,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:42,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:42,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:42,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:42,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:42,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 308 transitions, 3380 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:42,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:42,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:42,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:43,234 INFO L124 PetriNetUnfolderBase]: 1788/3188 cut-off events. [2024-06-14 14:09:43,234 INFO L125 PetriNetUnfolderBase]: For 234365/234365 co-relation queries the response was YES. [2024-06-14 14:09:43,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20778 conditions, 3188 events. 1788/3188 cut-off events. For 234365/234365 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20526 event pairs, 403 based on Foata normal form. 1/3185 useless extension candidates. Maximal degree in co-relation 20666. Up to 2746 conditions per place. [2024-06-14 14:09:43,267 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 272 selfloop transitions, 41 changer transitions 0/322 dead transitions. [2024-06-14 14:09:43,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 322 transitions, 4182 flow [2024-06-14 14:09:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:09:43,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:09:43,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 14:09:43,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5252525252525253 [2024-06-14 14:09:43,268 INFO L175 Difference]: Start difference. First operand has 268 places, 308 transitions, 3380 flow. Second operand 9 states and 208 transitions. [2024-06-14 14:09:43,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 322 transitions, 4182 flow [2024-06-14 14:09:44,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 322 transitions, 3982 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:44,162 INFO L231 Difference]: Finished difference. Result has 272 places, 308 transitions, 3268 flow [2024-06-14 14:09:44,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3180, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3268, PETRI_PLACES=272, PETRI_TRANSITIONS=308} [2024-06-14 14:09:44,163 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 227 predicate places. [2024-06-14 14:09:44,163 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 308 transitions, 3268 flow [2024-06-14 14:09:44,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:44,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:44,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:44,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 14:09:44,164 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:44,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:44,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1759009129, now seen corresponding path program 12 times [2024-06-14 14:09:44,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:44,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241674826] [2024-06-14 14:09:44,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:44,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:44,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:44,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241674826] [2024-06-14 14:09:44,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241674826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:44,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:44,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:44,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687018348] [2024-06-14 14:09:44,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:44,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:44,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:44,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:44,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:44,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:44,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 308 transitions, 3268 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:44,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:44,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:44,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:45,032 INFO L124 PetriNetUnfolderBase]: 1785/3184 cut-off events. [2024-06-14 14:09:45,033 INFO L125 PetriNetUnfolderBase]: For 237303/237303 co-relation queries the response was YES. [2024-06-14 14:09:45,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20649 conditions, 3184 events. 1785/3184 cut-off events. For 237303/237303 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20499 event pairs, 403 based on Foata normal form. 1/3181 useless extension candidates. Maximal degree in co-relation 20536. Up to 2743 conditions per place. [2024-06-14 14:09:45,066 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 270 selfloop transitions, 40 changer transitions 0/319 dead transitions. [2024-06-14 14:09:45,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 319 transitions, 3914 flow [2024-06-14 14:09:45,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:09:45,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-14 14:09:45,067 INFO L175 Difference]: Start difference. First operand has 272 places, 308 transitions, 3268 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:09:45,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 319 transitions, 3914 flow [2024-06-14 14:09:46,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 319 transitions, 3720 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-14 14:09:46,045 INFO L231 Difference]: Finished difference. Result has 270 places, 308 transitions, 3160 flow [2024-06-14 14:09:46,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3074, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3160, PETRI_PLACES=270, PETRI_TRANSITIONS=308} [2024-06-14 14:09:46,046 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 225 predicate places. [2024-06-14 14:09:46,046 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 308 transitions, 3160 flow [2024-06-14 14:09:46,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:46,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:46,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:46,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 14:09:46,047 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:46,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:46,047 INFO L85 PathProgramCache]: Analyzing trace with hash 2106084949, now seen corresponding path program 2 times [2024-06-14 14:09:46,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:46,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027131703] [2024-06-14 14:09:46,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:46,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:46,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:46,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:46,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027131703] [2024-06-14 14:09:46,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027131703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:46,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:46,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:46,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572988314] [2024-06-14 14:09:46,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:46,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:46,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:46,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:46,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:46,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:09:46,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 308 transitions, 3160 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:46,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:46,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:09:46,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:46,922 INFO L124 PetriNetUnfolderBase]: 1716/3090 cut-off events. [2024-06-14 14:09:46,922 INFO L125 PetriNetUnfolderBase]: For 267062/267062 co-relation queries the response was YES. [2024-06-14 14:09:46,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20262 conditions, 3090 events. 1716/3090 cut-off events. For 267062/267062 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20158 event pairs, 392 based on Foata normal form. 10/3067 useless extension candidates. Maximal degree in co-relation 20150. Up to 2473 conditions per place. [2024-06-14 14:09:46,954 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 232 selfloop transitions, 37 changer transitions 0/324 dead transitions. [2024-06-14 14:09:46,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 324 transitions, 3776 flow [2024-06-14 14:09:46,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:46,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:46,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:09:46,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:09:46,955 INFO L175 Difference]: Start difference. First operand has 270 places, 308 transitions, 3160 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:09:46,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 324 transitions, 3776 flow [2024-06-14 14:09:47,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 324 transitions, 3696 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:47,709 INFO L231 Difference]: Finished difference. Result has 271 places, 309 transitions, 3182 flow [2024-06-14 14:09:47,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3080, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3182, PETRI_PLACES=271, PETRI_TRANSITIONS=309} [2024-06-14 14:09:47,709 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2024-06-14 14:09:47,710 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 309 transitions, 3182 flow [2024-06-14 14:09:47,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:47,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:47,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:47,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 14:09:47,710 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:47,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:47,711 INFO L85 PathProgramCache]: Analyzing trace with hash -414334665, now seen corresponding path program 3 times [2024-06-14 14:09:47,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:47,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292253637] [2024-06-14 14:09:47,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:47,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:48,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:48,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:48,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292253637] [2024-06-14 14:09:48,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292253637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:48,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:48,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:48,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826185619] [2024-06-14 14:09:48,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:48,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:48,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:48,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:48,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:48,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:09:48,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 309 transitions, 3182 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:48,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:48,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:09:48,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:48,975 INFO L124 PetriNetUnfolderBase]: 1745/3159 cut-off events. [2024-06-14 14:09:48,975 INFO L125 PetriNetUnfolderBase]: For 275014/275014 co-relation queries the response was YES. [2024-06-14 14:09:49,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20804 conditions, 3159 events. 1745/3159 cut-off events. For 275014/275014 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20713 event pairs, 391 based on Foata normal form. 9/3140 useless extension candidates. Maximal degree in co-relation 20691. Up to 2557 conditions per place. [2024-06-14 14:09:49,026 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 254 selfloop transitions, 16 changer transitions 0/325 dead transitions. [2024-06-14 14:09:49,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 325 transitions, 3802 flow [2024-06-14 14:09:49,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 14:09:49,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5551948051948052 [2024-06-14 14:09:49,028 INFO L175 Difference]: Start difference. First operand has 271 places, 309 transitions, 3182 flow. Second operand 7 states and 171 transitions. [2024-06-14 14:09:49,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 325 transitions, 3802 flow [2024-06-14 14:09:50,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 325 transitions, 3722 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:50,150 INFO L231 Difference]: Finished difference. Result has 273 places, 310 transitions, 3164 flow [2024-06-14 14:09:50,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3164, PETRI_PLACES=273, PETRI_TRANSITIONS=310} [2024-06-14 14:09:50,150 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-14 14:09:50,150 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 310 transitions, 3164 flow [2024-06-14 14:09:50,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:50,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:50,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:50,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 14:09:50,151 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:50,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:50,151 INFO L85 PathProgramCache]: Analyzing trace with hash -413770155, now seen corresponding path program 4 times [2024-06-14 14:09:50,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:50,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147611876] [2024-06-14 14:09:50,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:50,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:50,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:50,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:50,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147611876] [2024-06-14 14:09:50,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147611876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:50,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:50,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:50,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064440784] [2024-06-14 14:09:50,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:50,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:50,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:50,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:50,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:50,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:09:50,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 310 transitions, 3164 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:50,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:50,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:09:50,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:51,191 INFO L124 PetriNetUnfolderBase]: 1747/3171 cut-off events. [2024-06-14 14:09:51,191 INFO L125 PetriNetUnfolderBase]: For 264558/264558 co-relation queries the response was YES. [2024-06-14 14:09:51,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20531 conditions, 3171 events. 1747/3171 cut-off events. For 264558/264558 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20841 event pairs, 385 based on Foata normal form. 8/3154 useless extension candidates. Maximal degree in co-relation 20417. Up to 2535 conditions per place. [2024-06-14 14:09:51,242 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 256 selfloop transitions, 19 changer transitions 0/330 dead transitions. [2024-06-14 14:09:51,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 330 transitions, 3816 flow [2024-06-14 14:09:51,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:51,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:51,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 14:09:51,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-14 14:09:51,243 INFO L175 Difference]: Start difference. First operand has 273 places, 310 transitions, 3164 flow. Second operand 8 states and 194 transitions. [2024-06-14 14:09:51,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 330 transitions, 3816 flow [2024-06-14 14:09:52,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 330 transitions, 3776 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 14:09:52,048 INFO L231 Difference]: Finished difference. Result has 276 places, 311 transitions, 3192 flow [2024-06-14 14:09:52,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3124, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3192, PETRI_PLACES=276, PETRI_TRANSITIONS=311} [2024-06-14 14:09:52,048 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-14 14:09:52,049 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 311 transitions, 3192 flow [2024-06-14 14:09:52,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:52,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:52,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:52,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 14:09:52,049 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:52,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:52,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2085883083, now seen corresponding path program 1 times [2024-06-14 14:09:52,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:52,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651780563] [2024-06-14 14:09:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:52,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:52,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:52,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:52,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651780563] [2024-06-14 14:09:52,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651780563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:52,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:52,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:52,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180853795] [2024-06-14 14:09:52,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:52,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:52,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:52,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:52,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:52,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:09:52,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 311 transitions, 3192 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:52,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:52,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:09:52,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:53,139 INFO L124 PetriNetUnfolderBase]: 1874/3370 cut-off events. [2024-06-14 14:09:53,140 INFO L125 PetriNetUnfolderBase]: For 304652/304652 co-relation queries the response was YES. [2024-06-14 14:09:53,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22486 conditions, 3370 events. 1874/3370 cut-off events. For 304652/304652 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22172 event pairs, 386 based on Foata normal form. 8/3373 useless extension candidates. Maximal degree in co-relation 22371. Up to 2710 conditions per place. [2024-06-14 14:09:53,195 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 271 selfloop transitions, 19 changer transitions 0/342 dead transitions. [2024-06-14 14:09:53,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 342 transitions, 4070 flow [2024-06-14 14:09:53,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:09:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:09:53,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 14:09:53,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 14:09:53,197 INFO L175 Difference]: Start difference. First operand has 276 places, 311 transitions, 3192 flow. Second operand 8 states and 204 transitions. [2024-06-14 14:09:53,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 342 transitions, 4070 flow [2024-06-14 14:09:54,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 342 transitions, 4018 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:54,891 INFO L231 Difference]: Finished difference. Result has 278 places, 313 transitions, 3220 flow [2024-06-14 14:09:54,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3140, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3220, PETRI_PLACES=278, PETRI_TRANSITIONS=313} [2024-06-14 14:09:54,892 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 233 predicate places. [2024-06-14 14:09:54,892 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 313 transitions, 3220 flow [2024-06-14 14:09:54,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:54,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:54,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:54,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 14:09:54,893 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:54,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:54,893 INFO L85 PathProgramCache]: Analyzing trace with hash -33109813, now seen corresponding path program 2 times [2024-06-14 14:09:54,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:54,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871190335] [2024-06-14 14:09:54,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:54,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:55,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:55,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871190335] [2024-06-14 14:09:55,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871190335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:55,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:55,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:55,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165308065] [2024-06-14 14:09:55,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:55,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:55,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:55,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:55,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:55,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:09:55,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 313 transitions, 3220 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:55,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:55,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:09:55,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:55,899 INFO L124 PetriNetUnfolderBase]: 1852/3332 cut-off events. [2024-06-14 14:09:55,899 INFO L125 PetriNetUnfolderBase]: For 286977/286977 co-relation queries the response was YES. [2024-06-14 14:09:55,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21549 conditions, 3332 events. 1852/3332 cut-off events. For 286977/286977 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 21956 event pairs, 401 based on Foata normal form. 9/3337 useless extension candidates. Maximal degree in co-relation 21433. Up to 2743 conditions per place. [2024-06-14 14:09:55,934 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 266 selfloop transitions, 16 changer transitions 0/334 dead transitions. [2024-06-14 14:09:55,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 334 transitions, 3862 flow [2024-06-14 14:09:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 14:09:55,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5746753246753247 [2024-06-14 14:09:55,935 INFO L175 Difference]: Start difference. First operand has 278 places, 313 transitions, 3220 flow. Second operand 7 states and 177 transitions. [2024-06-14 14:09:55,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 334 transitions, 3862 flow [2024-06-14 14:09:57,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 334 transitions, 3832 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 14:09:57,326 INFO L231 Difference]: Finished difference. Result has 281 places, 313 transitions, 3228 flow [2024-06-14 14:09:57,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3190, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3228, PETRI_PLACES=281, PETRI_TRANSITIONS=313} [2024-06-14 14:09:57,327 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 236 predicate places. [2024-06-14 14:09:57,327 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 313 transitions, 3228 flow [2024-06-14 14:09:57,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:57,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:57,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:57,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 14:09:57,328 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:57,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:57,328 INFO L85 PathProgramCache]: Analyzing trace with hash 2112026639, now seen corresponding path program 3 times [2024-06-14 14:09:57,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:57,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310016955] [2024-06-14 14:09:57,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:57,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:57,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:57,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:57,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310016955] [2024-06-14 14:09:57,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310016955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:57,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:57,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:57,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438281694] [2024-06-14 14:09:57,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:57,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:57,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:57,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:57,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:57,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:09:57,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 313 transitions, 3228 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:57,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:57,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:09:57,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:09:58,203 INFO L124 PetriNetUnfolderBase]: 1886/3385 cut-off events. [2024-06-14 14:09:58,203 INFO L125 PetriNetUnfolderBase]: For 294659/294659 co-relation queries the response was YES. [2024-06-14 14:09:58,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21964 conditions, 3385 events. 1886/3385 cut-off events. For 294659/294659 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22300 event pairs, 410 based on Foata normal form. 10/3388 useless extension candidates. Maximal degree in co-relation 21846. Up to 2766 conditions per place. [2024-06-14 14:09:58,240 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 241 selfloop transitions, 39 changer transitions 0/332 dead transitions. [2024-06-14 14:09:58,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 332 transitions, 3878 flow [2024-06-14 14:09:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:09:58,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:09:58,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:09:58,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-14 14:09:58,242 INFO L175 Difference]: Start difference. First operand has 281 places, 313 transitions, 3228 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:09:58,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 332 transitions, 3878 flow [2024-06-14 14:09:59,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 332 transitions, 3841 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 14:09:59,268 INFO L231 Difference]: Finished difference. Result has 282 places, 314 transitions, 3297 flow [2024-06-14 14:09:59,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3191, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3297, PETRI_PLACES=282, PETRI_TRANSITIONS=314} [2024-06-14 14:09:59,269 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-14 14:09:59,269 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 314 transitions, 3297 flow [2024-06-14 14:09:59,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:09:59,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:09:59,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:09:59,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 14:09:59,270 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:09:59,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:09:59,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1795415691, now seen corresponding path program 1 times [2024-06-14 14:09:59,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:09:59,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114660920] [2024-06-14 14:09:59,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:09:59,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:09:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:09:59,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:09:59,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:09:59,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114660920] [2024-06-14 14:09:59,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114660920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:09:59,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:09:59,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:09:59,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320967067] [2024-06-14 14:09:59,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:09:59,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:09:59,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:09:59,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:09:59,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:09:59,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:09:59,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 314 transitions, 3297 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:09:59,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:09:59,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:09:59,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:00,248 INFO L124 PetriNetUnfolderBase]: 1967/3485 cut-off events. [2024-06-14 14:10:00,248 INFO L125 PetriNetUnfolderBase]: For 275559/275559 co-relation queries the response was YES. [2024-06-14 14:10:00,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22616 conditions, 3485 events. 1967/3485 cut-off events. For 275559/275559 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22678 event pairs, 429 based on Foata normal form. 2/3483 useless extension candidates. Maximal degree in co-relation 22497. Up to 3038 conditions per place. [2024-06-14 14:10:00,306 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 295 selfloop transitions, 27 changer transitions 0/331 dead transitions. [2024-06-14 14:10:00,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 331 transitions, 4013 flow [2024-06-14 14:10:00,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:00,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:00,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:10:00,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-14 14:10:00,308 INFO L175 Difference]: Start difference. First operand has 282 places, 314 transitions, 3297 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:10:00,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 331 transitions, 4013 flow [2024-06-14 14:10:01,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 331 transitions, 3931 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:01,704 INFO L231 Difference]: Finished difference. Result has 284 places, 316 transitions, 3314 flow [2024-06-14 14:10:01,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3215, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3314, PETRI_PLACES=284, PETRI_TRANSITIONS=316} [2024-06-14 14:10:01,705 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-14 14:10:01,705 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 316 transitions, 3314 flow [2024-06-14 14:10:01,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:01,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:01,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:01,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 14:10:01,707 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:01,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:01,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1127941515, now seen corresponding path program 4 times [2024-06-14 14:10:01,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:01,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328540883] [2024-06-14 14:10:01,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:01,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:02,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:02,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328540883] [2024-06-14 14:10:02,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328540883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:02,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:02,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:02,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075992760] [2024-06-14 14:10:02,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:02,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:02,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:02,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:02,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:02,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 44 [2024-06-14 14:10:02,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 316 transitions, 3314 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:10:02,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:02,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 44 [2024-06-14 14:10:02,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:02,880 INFO L124 PetriNetUnfolderBase]: 1904/3424 cut-off events. [2024-06-14 14:10:02,881 INFO L125 PetriNetUnfolderBase]: For 296032/296032 co-relation queries the response was YES. [2024-06-14 14:10:02,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22132 conditions, 3424 events. 1904/3424 cut-off events. For 296032/296032 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22639 event pairs, 417 based on Foata normal form. 10/3426 useless extension candidates. Maximal degree in co-relation 22012. Up to 2798 conditions per place. [2024-06-14 14:10:02,921 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 240 selfloop transitions, 40 changer transitions 0/332 dead transitions. [2024-06-14 14:10:02,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 332 transitions, 3960 flow [2024-06-14 14:10:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:02,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:02,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:10:02,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:10:02,922 INFO L175 Difference]: Start difference. First operand has 284 places, 316 transitions, 3314 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:10:02,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 332 transitions, 3960 flow [2024-06-14 14:10:04,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 332 transitions, 3877 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:04,162 INFO L231 Difference]: Finished difference. Result has 286 places, 317 transitions, 3343 flow [2024-06-14 14:10:04,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3231, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3343, PETRI_PLACES=286, PETRI_TRANSITIONS=317} [2024-06-14 14:10:04,162 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 241 predicate places. [2024-06-14 14:10:04,162 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 317 transitions, 3343 flow [2024-06-14 14:10:04,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 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) [2024-06-14 14:10:04,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:04,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:04,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 14:10:04,163 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:04,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:04,163 INFO L85 PathProgramCache]: Analyzing trace with hash -70919819, now seen corresponding path program 2 times [2024-06-14 14:10:04,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:04,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55556864] [2024-06-14 14:10:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:04,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:04,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:04,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55556864] [2024-06-14 14:10:04,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55556864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:04,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:04,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:04,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820255574] [2024-06-14 14:10:04,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:04,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:04,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:04,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:04,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:04,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:04,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 317 transitions, 3343 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:04,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:04,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:04,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:05,081 INFO L124 PetriNetUnfolderBase]: 1985/3516 cut-off events. [2024-06-14 14:10:05,082 INFO L125 PetriNetUnfolderBase]: For 275702/275702 co-relation queries the response was YES. [2024-06-14 14:10:05,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22715 conditions, 3516 events. 1985/3516 cut-off events. For 275702/275702 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22916 event pairs, 435 based on Foata normal form. 2/3514 useless extension candidates. Maximal degree in co-relation 22594. Up to 3068 conditions per place. [2024-06-14 14:10:05,122 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 295 selfloop transitions, 27 changer transitions 0/331 dead transitions. [2024-06-14 14:10:05,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 331 transitions, 4057 flow [2024-06-14 14:10:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:05,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:05,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:10:05,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-14 14:10:05,123 INFO L175 Difference]: Start difference. First operand has 286 places, 317 transitions, 3343 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:10:05,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 331 transitions, 4057 flow [2024-06-14 14:10:05,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 331 transitions, 3969 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:05,854 INFO L231 Difference]: Finished difference. Result has 288 places, 319 transitions, 3360 flow [2024-06-14 14:10:05,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3255, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3360, PETRI_PLACES=288, PETRI_TRANSITIONS=319} [2024-06-14 14:10:05,855 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-14 14:10:05,855 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 319 transitions, 3360 flow [2024-06-14 14:10:05,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:05,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:05,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:05,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 14:10:05,856 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:05,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:05,856 INFO L85 PathProgramCache]: Analyzing trace with hash -424238731, now seen corresponding path program 3 times [2024-06-14 14:10:05,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:05,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663255158] [2024-06-14 14:10:05,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:05,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:06,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:06,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663255158] [2024-06-14 14:10:06,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663255158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:06,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:06,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:06,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980273605] [2024-06-14 14:10:06,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:06,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:06,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:06,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:06,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:06,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:06,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 319 transitions, 3360 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:06,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:06,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:06,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:06,850 INFO L124 PetriNetUnfolderBase]: 1993/3530 cut-off events. [2024-06-14 14:10:06,851 INFO L125 PetriNetUnfolderBase]: For 282013/282013 co-relation queries the response was YES. [2024-06-14 14:10:06,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22860 conditions, 3530 events. 1993/3530 cut-off events. For 282013/282013 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22994 event pairs, 437 based on Foata normal form. 2/3528 useless extension candidates. Maximal degree in co-relation 22738. Up to 3080 conditions per place. [2024-06-14 14:10:06,885 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 296 selfloop transitions, 28 changer transitions 0/333 dead transitions. [2024-06-14 14:10:06,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 333 transitions, 4082 flow [2024-06-14 14:10:06,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:06,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:06,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 14:10:06,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-14 14:10:06,886 INFO L175 Difference]: Start difference. First operand has 288 places, 319 transitions, 3360 flow. Second operand 7 states and 166 transitions. [2024-06-14 14:10:06,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 333 transitions, 4082 flow [2024-06-14 14:10:07,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 333 transitions, 3993 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:07,861 INFO L231 Difference]: Finished difference. Result has 290 places, 321 transitions, 3382 flow [2024-06-14 14:10:07,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3271, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3382, PETRI_PLACES=290, PETRI_TRANSITIONS=321} [2024-06-14 14:10:07,861 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-14 14:10:07,862 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 321 transitions, 3382 flow [2024-06-14 14:10:07,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:07,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:07,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:07,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 14:10:07,862 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:07,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:07,863 INFO L85 PathProgramCache]: Analyzing trace with hash -413763211, now seen corresponding path program 4 times [2024-06-14 14:10:07,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:07,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938491765] [2024-06-14 14:10:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:07,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:07,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:08,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:08,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938491765] [2024-06-14 14:10:08,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938491765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:08,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:08,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 14:10:08,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185528123] [2024-06-14 14:10:08,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:08,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 14:10:08,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:08,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 14:10:08,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 14:10:08,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:08,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 321 transitions, 3382 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:08,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:08,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:08,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:08,829 INFO L124 PetriNetUnfolderBase]: 1988/3527 cut-off events. [2024-06-14 14:10:08,829 INFO L125 PetriNetUnfolderBase]: For 281656/281656 co-relation queries the response was YES. [2024-06-14 14:10:08,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22756 conditions, 3527 events. 1988/3527 cut-off events. For 281656/281656 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23011 event pairs, 417 based on Foata normal form. 2/3525 useless extension candidates. Maximal degree in co-relation 22633. Up to 3047 conditions per place. [2024-06-14 14:10:08,870 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 292 selfloop transitions, 35 changer transitions 0/336 dead transitions. [2024-06-14 14:10:08,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 336 transitions, 4116 flow [2024-06-14 14:10:08,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:08,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:08,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 14:10:08,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5422077922077922 [2024-06-14 14:10:08,871 INFO L175 Difference]: Start difference. First operand has 290 places, 321 transitions, 3382 flow. Second operand 7 states and 167 transitions. [2024-06-14 14:10:08,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 336 transitions, 4116 flow [2024-06-14 14:10:09,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 336 transitions, 4021 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:09,712 INFO L231 Difference]: Finished difference. Result has 292 places, 323 transitions, 3416 flow [2024-06-14 14:10:09,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3287, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3416, PETRI_PLACES=292, PETRI_TRANSITIONS=323} [2024-06-14 14:10:09,712 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 247 predicate places. [2024-06-14 14:10:09,712 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 323 transitions, 3416 flow [2024-06-14 14:10:09,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:09,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:09,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:09,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 14:10:09,713 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:09,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:09,713 INFO L85 PathProgramCache]: Analyzing trace with hash 613354516, now seen corresponding path program 1 times [2024-06-14 14:10:09,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:09,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482001931] [2024-06-14 14:10:09,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:09,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:10,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:10,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482001931] [2024-06-14 14:10:10,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482001931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:10,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:10,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:10,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121049052] [2024-06-14 14:10:10,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:10,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:10,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:10,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:10,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:10,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:10,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 323 transitions, 3416 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:10,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:10,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:10,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:10,940 INFO L124 PetriNetUnfolderBase]: 2022/3583 cut-off events. [2024-06-14 14:10:10,940 INFO L125 PetriNetUnfolderBase]: For 301372/301372 co-relation queries the response was YES. [2024-06-14 14:10:10,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23584 conditions, 3583 events. 2022/3583 cut-off events. For 301372/301372 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 23405 event pairs, 321 based on Foata normal form. 2/3582 useless extension candidates. Maximal degree in co-relation 23460. Up to 2941 conditions per place. [2024-06-14 14:10:10,988 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 299 selfloop transitions, 55 changer transitions 0/363 dead transitions. [2024-06-14 14:10:10,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 363 transitions, 4681 flow [2024-06-14 14:10:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:10:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:10:10,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 14:10:10,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:10:10,990 INFO L175 Difference]: Start difference. First operand has 292 places, 323 transitions, 3416 flow. Second operand 8 states and 208 transitions. [2024-06-14 14:10:10,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 363 transitions, 4681 flow [2024-06-14 14:10:11,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 363 transitions, 4568 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:11,944 INFO L231 Difference]: Finished difference. Result has 296 places, 330 transitions, 3551 flow [2024-06-14 14:10:11,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3303, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3551, PETRI_PLACES=296, PETRI_TRANSITIONS=330} [2024-06-14 14:10:11,945 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-14 14:10:11,945 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 330 transitions, 3551 flow [2024-06-14 14:10:11,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:11,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:11,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:11,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 14:10:11,946 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:11,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:11,946 INFO L85 PathProgramCache]: Analyzing trace with hash 620020756, now seen corresponding path program 2 times [2024-06-14 14:10:11,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:11,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795786665] [2024-06-14 14:10:11,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:11,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:11,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:12,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:12,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795786665] [2024-06-14 14:10:12,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795786665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:12,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:12,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:12,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265967422] [2024-06-14 14:10:12,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:12,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:12,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:12,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:12,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:12,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:12,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 330 transitions, 3551 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:12,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:12,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:12,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:13,160 INFO L124 PetriNetUnfolderBase]: 2043/3620 cut-off events. [2024-06-14 14:10:13,160 INFO L125 PetriNetUnfolderBase]: For 317102/317102 co-relation queries the response was YES. [2024-06-14 14:10:13,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24265 conditions, 3620 events. 2043/3620 cut-off events. For 317102/317102 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23714 event pairs, 325 based on Foata normal form. 2/3619 useless extension candidates. Maximal degree in co-relation 24139. Up to 2961 conditions per place. [2024-06-14 14:10:13,201 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 297 selfloop transitions, 58 changer transitions 0/364 dead transitions. [2024-06-14 14:10:13,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 364 transitions, 4776 flow [2024-06-14 14:10:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:10:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:10:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 14:10:13,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823863636363636 [2024-06-14 14:10:13,202 INFO L175 Difference]: Start difference. First operand has 296 places, 330 transitions, 3551 flow. Second operand 8 states and 205 transitions. [2024-06-14 14:10:13,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 364 transitions, 4776 flow [2024-06-14 14:10:14,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 364 transitions, 4607 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-14 14:10:14,270 INFO L231 Difference]: Finished difference. Result has 302 places, 335 transitions, 3622 flow [2024-06-14 14:10:14,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3424, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3622, PETRI_PLACES=302, PETRI_TRANSITIONS=335} [2024-06-14 14:10:14,285 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 257 predicate places. [2024-06-14 14:10:14,285 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 335 transitions, 3622 flow [2024-06-14 14:10:14,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:14,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:14,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:14,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 14:10:14,285 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:14,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:14,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2121444730, now seen corresponding path program 3 times [2024-06-14 14:10:14,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:14,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879844988] [2024-06-14 14:10:14,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:14,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:14,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:14,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:14,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879844988] [2024-06-14 14:10:14,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879844988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:14,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:14,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:14,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930580046] [2024-06-14 14:10:14,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:14,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:14,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:14,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:14,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:14,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 335 transitions, 3622 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:14,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:14,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:14,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:15,403 INFO L124 PetriNetUnfolderBase]: 2038/3608 cut-off events. [2024-06-14 14:10:15,403 INFO L125 PetriNetUnfolderBase]: For 314575/314575 co-relation queries the response was YES. [2024-06-14 14:10:15,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23980 conditions, 3608 events. 2038/3608 cut-off events. For 314575/314575 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23646 event pairs, 410 based on Foata normal form. 2/3602 useless extension candidates. Maximal degree in co-relation 23851. Up to 3061 conditions per place. [2024-06-14 14:10:15,444 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 306 selfloop transitions, 46 changer transitions 0/361 dead transitions. [2024-06-14 14:10:15,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 361 transitions, 4564 flow [2024-06-14 14:10:15,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:15,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 14:10:15,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:10:15,445 INFO L175 Difference]: Start difference. First operand has 302 places, 335 transitions, 3622 flow. Second operand 7 states and 182 transitions. [2024-06-14 14:10:15,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 361 transitions, 4564 flow [2024-06-14 14:10:16,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 361 transitions, 4448 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 14:10:16,833 INFO L231 Difference]: Finished difference. Result has 305 places, 335 transitions, 3603 flow [2024-06-14 14:10:16,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3603, PETRI_PLACES=305, PETRI_TRANSITIONS=335} [2024-06-14 14:10:16,834 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 260 predicate places. [2024-06-14 14:10:16,834 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 335 transitions, 3603 flow [2024-06-14 14:10:16,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:16,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:16,834 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, 1] [2024-06-14 14:10:16,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 14:10:16,835 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:16,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:16,835 INFO L85 PathProgramCache]: Analyzing trace with hash -82980392, now seen corresponding path program 4 times [2024-06-14 14:10:16,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:16,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901381812] [2024-06-14 14:10:16,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:16,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:16,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:17,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:17,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:17,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901381812] [2024-06-14 14:10:17,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901381812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:17,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:17,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:17,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573977823] [2024-06-14 14:10:17,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:17,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:17,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:17,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:17,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:17,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:17,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 335 transitions, 3603 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:17,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:17,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:17,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:18,012 INFO L124 PetriNetUnfolderBase]: 2046/3625 cut-off events. [2024-06-14 14:10:18,013 INFO L125 PetriNetUnfolderBase]: For 321842/321842 co-relation queries the response was YES. [2024-06-14 14:10:18,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24063 conditions, 3625 events. 2046/3625 cut-off events. For 321842/321842 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23805 event pairs, 417 based on Foata normal form. 2/3624 useless extension candidates. Maximal degree in co-relation 23933. Up to 3106 conditions per place. [2024-06-14 14:10:18,054 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 304 selfloop transitions, 45 changer transitions 0/358 dead transitions. [2024-06-14 14:10:18,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 358 transitions, 4381 flow [2024-06-14 14:10:18,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:18,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 14:10:18,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-14 14:10:18,056 INFO L175 Difference]: Start difference. First operand has 305 places, 335 transitions, 3603 flow. Second operand 7 states and 178 transitions. [2024-06-14 14:10:18,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 358 transitions, 4381 flow [2024-06-14 14:10:19,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 358 transitions, 4262 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 14:10:19,393 INFO L231 Difference]: Finished difference. Result has 306 places, 337 transitions, 3611 flow [2024-06-14 14:10:19,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3611, PETRI_PLACES=306, PETRI_TRANSITIONS=337} [2024-06-14 14:10:19,393 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-14 14:10:19,394 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 337 transitions, 3611 flow [2024-06-14 14:10:19,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:19,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:19,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:19,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 14:10:19,394 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:19,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:19,395 INFO L85 PathProgramCache]: Analyzing trace with hash 882917848, now seen corresponding path program 5 times [2024-06-14 14:10:19,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:19,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979719840] [2024-06-14 14:10:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:19,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:19,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:19,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:19,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979719840] [2024-06-14 14:10:19,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979719840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:19,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:19,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:19,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476099602] [2024-06-14 14:10:19,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:19,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:19,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:19,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:19,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:19,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:19,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 337 transitions, 3611 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:19,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:19,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:19,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:20,691 INFO L124 PetriNetUnfolderBase]: 2067/3660 cut-off events. [2024-06-14 14:10:20,691 INFO L125 PetriNetUnfolderBase]: For 336572/336572 co-relation queries the response was YES. [2024-06-14 14:10:20,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24460 conditions, 3660 events. 2067/3660 cut-off events. For 336572/336572 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24045 event pairs, 418 based on Foata normal form. 2/3659 useless extension candidates. Maximal degree in co-relation 24329. Up to 3114 conditions per place. [2024-06-14 14:10:20,727 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 304 selfloop transitions, 53 changer transitions 0/366 dead transitions. [2024-06-14 14:10:20,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 366 transitions, 4613 flow [2024-06-14 14:10:20,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:20,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-14 14:10:20,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5580808080808081 [2024-06-14 14:10:20,729 INFO L175 Difference]: Start difference. First operand has 306 places, 337 transitions, 3611 flow. Second operand 9 states and 221 transitions. [2024-06-14 14:10:20,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 366 transitions, 4613 flow [2024-06-14 14:10:22,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 366 transitions, 4516 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:22,008 INFO L231 Difference]: Finished difference. Result has 311 places, 341 transitions, 3692 flow [2024-06-14 14:10:22,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3692, PETRI_PLACES=311, PETRI_TRANSITIONS=341} [2024-06-14 14:10:22,009 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-14 14:10:22,009 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 341 transitions, 3692 flow [2024-06-14 14:10:22,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:22,010 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:22,010 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:22,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 14:10:22,010 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:22,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:22,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1503524880, now seen corresponding path program 6 times [2024-06-14 14:10:22,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:22,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636741584] [2024-06-14 14:10:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:22,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:22,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:22,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636741584] [2024-06-14 14:10:22,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636741584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:22,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:22,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:22,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187700961] [2024-06-14 14:10:22,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:22,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:22,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:22,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:22,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:22,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:22,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 341 transitions, 3692 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:22,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:22,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:22,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:23,205 INFO L124 PetriNetUnfolderBase]: 2062/3653 cut-off events. [2024-06-14 14:10:23,206 INFO L125 PetriNetUnfolderBase]: For 335885/335885 co-relation queries the response was YES. [2024-06-14 14:10:23,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24410 conditions, 3653 events. 2062/3653 cut-off events. For 335885/335885 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24040 event pairs, 419 based on Foata normal form. 2/3652 useless extension candidates. Maximal degree in co-relation 24277. Up to 3130 conditions per place. [2024-06-14 14:10:23,248 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 308 selfloop transitions, 47 changer transitions 0/364 dead transitions. [2024-06-14 14:10:23,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 364 transitions, 4458 flow [2024-06-14 14:10:23,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-14 14:10:23,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 14:10:23,250 INFO L175 Difference]: Start difference. First operand has 311 places, 341 transitions, 3692 flow. Second operand 9 states and 220 transitions. [2024-06-14 14:10:23,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 364 transitions, 4458 flow [2024-06-14 14:10:24,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 364 transitions, 4344 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 14:10:24,609 INFO L231 Difference]: Finished difference. Result has 314 places, 341 transitions, 3677 flow [2024-06-14 14:10:24,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3677, PETRI_PLACES=314, PETRI_TRANSITIONS=341} [2024-06-14 14:10:24,609 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 269 predicate places. [2024-06-14 14:10:24,609 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 341 transitions, 3677 flow [2024-06-14 14:10:24,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:24,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:24,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:24,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 14:10:24,610 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:24,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:24,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1034786064, now seen corresponding path program 1 times [2024-06-14 14:10:24,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:24,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877574990] [2024-06-14 14:10:24,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:24,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:25,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:25,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:25,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877574990] [2024-06-14 14:10:25,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877574990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:25,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:25,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:25,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028206526] [2024-06-14 14:10:25,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:25,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:25,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:25,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:25,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:25,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:25,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 341 transitions, 3677 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:25,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:25,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:25,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:25,756 INFO L124 PetriNetUnfolderBase]: 2067/3663 cut-off events. [2024-06-14 14:10:25,756 INFO L125 PetriNetUnfolderBase]: For 338612/338612 co-relation queries the response was YES. [2024-06-14 14:10:25,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24500 conditions, 3663 events. 2067/3663 cut-off events. For 338612/338612 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 24118 event pairs, 417 based on Foata normal form. 1/3662 useless extension candidates. Maximal degree in co-relation 24366. Up to 3154 conditions per place. [2024-06-14 14:10:25,800 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 331 selfloop transitions, 27 changer transitions 0/367 dead transitions. [2024-06-14 14:10:25,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 367 transitions, 4499 flow [2024-06-14 14:10:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:25,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 14:10:25,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5811688311688312 [2024-06-14 14:10:25,801 INFO L175 Difference]: Start difference. First operand has 314 places, 341 transitions, 3677 flow. Second operand 7 states and 179 transitions. [2024-06-14 14:10:25,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 367 transitions, 4499 flow [2024-06-14 14:10:27,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 367 transitions, 4395 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:27,445 INFO L231 Difference]: Finished difference. Result has 313 places, 344 transitions, 3691 flow [2024-06-14 14:10:27,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3691, PETRI_PLACES=313, PETRI_TRANSITIONS=344} [2024-06-14 14:10:27,446 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 268 predicate places. [2024-06-14 14:10:27,446 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 344 transitions, 3691 flow [2024-06-14 14:10:27,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:27,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:27,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:27,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 14:10:27,447 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:27,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:27,447 INFO L85 PathProgramCache]: Analyzing trace with hash -926546060, now seen corresponding path program 2 times [2024-06-14 14:10:27,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:27,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669921293] [2024-06-14 14:10:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:27,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:27,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:27,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669921293] [2024-06-14 14:10:27,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669921293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:27,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:27,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:27,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639347032] [2024-06-14 14:10:27,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:27,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:27,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:27,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:27,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:27,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:27,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 344 transitions, 3691 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:27,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:27,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:27,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:28,562 INFO L124 PetriNetUnfolderBase]: 2080/3684 cut-off events. [2024-06-14 14:10:28,562 INFO L125 PetriNetUnfolderBase]: For 351167/351167 co-relation queries the response was YES. [2024-06-14 14:10:28,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25135 conditions, 3684 events. 2080/3684 cut-off events. For 351167/351167 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24264 event pairs, 418 based on Foata normal form. 1/3682 useless extension candidates. Maximal degree in co-relation 25000. Up to 3119 conditions per place. [2024-06-14 14:10:28,605 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 298 selfloop transitions, 64 changer transitions 0/371 dead transitions. [2024-06-14 14:10:28,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 371 transitions, 4759 flow [2024-06-14 14:10:28,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:28,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 14:10:28,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-14 14:10:28,606 INFO L175 Difference]: Start difference. First operand has 313 places, 344 transitions, 3691 flow. Second operand 7 states and 182 transitions. [2024-06-14 14:10:28,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 371 transitions, 4759 flow [2024-06-14 14:10:30,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 371 transitions, 4679 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 14:10:30,088 INFO L231 Difference]: Finished difference. Result has 316 places, 350 transitions, 3863 flow [2024-06-14 14:10:30,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3611, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3863, PETRI_PLACES=316, PETRI_TRANSITIONS=350} [2024-06-14 14:10:30,088 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-14 14:10:30,088 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 350 transitions, 3863 flow [2024-06-14 14:10:30,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:30,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:30,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:30,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 14:10:30,089 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:30,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:30,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1503529840, now seen corresponding path program 3 times [2024-06-14 14:10:30,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:30,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993027264] [2024-06-14 14:10:30,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:30,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:30,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:30,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:30,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993027264] [2024-06-14 14:10:30,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993027264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:30,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:30,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:30,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670802329] [2024-06-14 14:10:30,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:30,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:30,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:30,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:30,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:30,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:30,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 350 transitions, 3863 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:30,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:30,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:30,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:31,159 INFO L124 PetriNetUnfolderBase]: 2085/3693 cut-off events. [2024-06-14 14:10:31,160 INFO L125 PetriNetUnfolderBase]: For 361409/361409 co-relation queries the response was YES. [2024-06-14 14:10:31,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25681 conditions, 3693 events. 2085/3693 cut-off events. For 361409/361409 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24350 event pairs, 418 based on Foata normal form. 1/3691 useless extension candidates. Maximal degree in co-relation 25545. Up to 3125 conditions per place. [2024-06-14 14:10:31,203 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 298 selfloop transitions, 69 changer transitions 0/376 dead transitions. [2024-06-14 14:10:31,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 376 transitions, 4899 flow [2024-06-14 14:10:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:31,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-14 14:10:31,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-06-14 14:10:31,204 INFO L175 Difference]: Start difference. First operand has 316 places, 350 transitions, 3863 flow. Second operand 9 states and 224 transitions. [2024-06-14 14:10:31,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 376 transitions, 4899 flow [2024-06-14 14:10:32,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 376 transitions, 4790 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 14:10:32,825 INFO L231 Difference]: Finished difference. Result has 321 places, 353 transitions, 3964 flow [2024-06-14 14:10:32,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3766, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3964, PETRI_PLACES=321, PETRI_TRANSITIONS=353} [2024-06-14 14:10:32,825 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 276 predicate places. [2024-06-14 14:10:32,826 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 353 transitions, 3964 flow [2024-06-14 14:10:32,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:32,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:32,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:32,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 14:10:32,826 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:32,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:32,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1923232694, now seen corresponding path program 1 times [2024-06-14 14:10:32,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:32,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894840661] [2024-06-14 14:10:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:32,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:33,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:33,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:33,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894840661] [2024-06-14 14:10:33,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894840661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:33,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:33,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:33,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579386643] [2024-06-14 14:10:33,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:33,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:33,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:33,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:33,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:33,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:33,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 353 transitions, 3964 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:33,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:33,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:33,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:33,924 INFO L124 PetriNetUnfolderBase]: 2098/3714 cut-off events. [2024-06-14 14:10:33,925 INFO L125 PetriNetUnfolderBase]: For 366090/366090 co-relation queries the response was YES. [2024-06-14 14:10:33,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26036 conditions, 3714 events. 2098/3714 cut-off events. For 366090/366090 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 24473 event pairs, 418 based on Foata normal form. 1/3711 useless extension candidates. Maximal degree in co-relation 25899. Up to 3128 conditions per place. [2024-06-14 14:10:33,969 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 295 selfloop transitions, 76 changer transitions 0/380 dead transitions. [2024-06-14 14:10:33,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 380 transitions, 5056 flow [2024-06-14 14:10:33,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:33,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:33,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 14:10:33,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5941558441558441 [2024-06-14 14:10:33,971 INFO L175 Difference]: Start difference. First operand has 321 places, 353 transitions, 3964 flow. Second operand 7 states and 183 transitions. [2024-06-14 14:10:33,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 380 transitions, 5056 flow [2024-06-14 14:10:36,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 380 transitions, 4872 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:36,553 INFO L231 Difference]: Finished difference. Result has 320 places, 359 transitions, 4062 flow [2024-06-14 14:10:36,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3782, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4062, PETRI_PLACES=320, PETRI_TRANSITIONS=359} [2024-06-14 14:10:36,554 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 275 predicate places. [2024-06-14 14:10:36,554 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 359 transitions, 4062 flow [2024-06-14 14:10:36,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:36,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:36,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:36,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 14:10:36,555 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:36,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:36,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1184750228, now seen corresponding path program 2 times [2024-06-14 14:10:36,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:36,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078480072] [2024-06-14 14:10:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:36,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:37,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:37,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078480072] [2024-06-14 14:10:37,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078480072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:37,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:37,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:37,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137899068] [2024-06-14 14:10:37,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:37,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:37,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:37,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:37,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:37,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:37,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 359 transitions, 4062 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:37,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:37,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:37,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:37,925 INFO L124 PetriNetUnfolderBase]: 2111/3736 cut-off events. [2024-06-14 14:10:37,926 INFO L125 PetriNetUnfolderBase]: For 372585/372585 co-relation queries the response was YES. [2024-06-14 14:10:37,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26568 conditions, 3736 events. 2111/3736 cut-off events. For 372585/372585 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24640 event pairs, 418 based on Foata normal form. 1/3733 useless extension candidates. Maximal degree in co-relation 26431. Up to 3143 conditions per place. [2024-06-14 14:10:37,973 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 296 selfloop transitions, 84 changer transitions 0/389 dead transitions. [2024-06-14 14:10:37,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 389 transitions, 5376 flow [2024-06-14 14:10:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:10:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:10:37,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-14 14:10:37,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782828282828283 [2024-06-14 14:10:37,975 INFO L175 Difference]: Start difference. First operand has 320 places, 359 transitions, 4062 flow. Second operand 9 states and 229 transitions. [2024-06-14 14:10:37,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 389 transitions, 5376 flow [2024-06-14 14:10:39,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 389 transitions, 5229 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-14 14:10:39,787 INFO L231 Difference]: Finished difference. Result has 325 places, 365 transitions, 4221 flow [2024-06-14 14:10:39,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3951, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4221, PETRI_PLACES=325, PETRI_TRANSITIONS=365} [2024-06-14 14:10:39,787 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-14 14:10:39,787 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 365 transitions, 4221 flow [2024-06-14 14:10:39,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:39,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:39,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:39,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 14:10:39,788 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:39,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:39,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1193321108, now seen corresponding path program 3 times [2024-06-14 14:10:39,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:39,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613262435] [2024-06-14 14:10:39,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:39,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:40,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:40,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:40,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613262435] [2024-06-14 14:10:40,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613262435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:40,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:40,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:40,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562835611] [2024-06-14 14:10:40,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:40,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:40,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:40,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:40,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:40,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:40,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 365 transitions, 4221 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:40,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:40,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:40,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:41,079 INFO L124 PetriNetUnfolderBase]: 2108/3732 cut-off events. [2024-06-14 14:10:41,079 INFO L125 PetriNetUnfolderBase]: For 368177/368177 co-relation queries the response was YES. [2024-06-14 14:10:41,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26530 conditions, 3732 events. 2108/3732 cut-off events. For 368177/368177 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 24684 event pairs, 418 based on Foata normal form. 1/3729 useless extension candidates. Maximal degree in co-relation 26392. Up to 3140 conditions per place. [2024-06-14 14:10:41,118 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 292 selfloop transitions, 88 changer transitions 0/389 dead transitions. [2024-06-14 14:10:41,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 389 transitions, 5225 flow [2024-06-14 14:10:41,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:41,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-14 14:10:41,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-06-14 14:10:41,120 INFO L175 Difference]: Start difference. First operand has 325 places, 365 transitions, 4221 flow. Second operand 10 states and 246 transitions. [2024-06-14 14:10:41,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 389 transitions, 5225 flow [2024-06-14 14:10:42,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 389 transitions, 5003 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-14 14:10:42,840 INFO L231 Difference]: Finished difference. Result has 328 places, 365 transitions, 4187 flow [2024-06-14 14:10:42,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4187, PETRI_PLACES=328, PETRI_TRANSITIONS=365} [2024-06-14 14:10:42,840 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-14 14:10:42,840 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 365 transitions, 4187 flow [2024-06-14 14:10:42,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:42,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:42,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:42,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 14:10:42,841 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:42,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:42,841 INFO L85 PathProgramCache]: Analyzing trace with hash 620029684, now seen corresponding path program 1 times [2024-06-14 14:10:42,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:42,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950752703] [2024-06-14 14:10:42,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:42,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:42,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:43,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:43,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950752703] [2024-06-14 14:10:43,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950752703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:43,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:43,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:43,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452103833] [2024-06-14 14:10:43,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:43,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:43,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:43,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:43,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:43,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:43,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 365 transitions, 4187 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:43,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:43,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:43,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:44,031 INFO L124 PetriNetUnfolderBase]: 2128/3766 cut-off events. [2024-06-14 14:10:44,032 INFO L125 PetriNetUnfolderBase]: For 390325/390325 co-relation queries the response was YES. [2024-06-14 14:10:44,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26736 conditions, 3766 events. 2128/3766 cut-off events. For 390325/390325 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 24842 event pairs, 342 based on Foata normal form. 6/3768 useless extension candidates. Maximal degree in co-relation 26598. Up to 3002 conditions per place. [2024-06-14 14:10:44,079 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 344 selfloop transitions, 43 changer transitions 0/396 dead transitions. [2024-06-14 14:10:44,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 396 transitions, 5307 flow [2024-06-14 14:10:44,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:44,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:44,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 14:10:44,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974025974025974 [2024-06-14 14:10:44,080 INFO L175 Difference]: Start difference. First operand has 328 places, 365 transitions, 4187 flow. Second operand 7 states and 184 transitions. [2024-06-14 14:10:44,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 396 transitions, 5307 flow [2024-06-14 14:10:45,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 396 transitions, 5105 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-14 14:10:45,727 INFO L231 Difference]: Finished difference. Result has 325 places, 366 transitions, 4103 flow [2024-06-14 14:10:45,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3987, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4103, PETRI_PLACES=325, PETRI_TRANSITIONS=366} [2024-06-14 14:10:45,728 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 280 predicate places. [2024-06-14 14:10:45,728 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 366 transitions, 4103 flow [2024-06-14 14:10:45,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:45,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:45,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:45,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 14:10:45,729 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:45,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:45,729 INFO L85 PathProgramCache]: Analyzing trace with hash 878317654, now seen corresponding path program 2 times [2024-06-14 14:10:45,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:45,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342575886] [2024-06-14 14:10:45,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:45,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:46,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:46,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342575886] [2024-06-14 14:10:46,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342575886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:46,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:46,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:46,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504412922] [2024-06-14 14:10:46,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:46,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:46,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:46,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:46,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:46,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:46,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 366 transitions, 4103 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:46,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:46,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:46,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:46,860 INFO L124 PetriNetUnfolderBase]: 2148/3802 cut-off events. [2024-06-14 14:10:46,860 INFO L125 PetriNetUnfolderBase]: For 391644/391644 co-relation queries the response was YES. [2024-06-14 14:10:46,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26973 conditions, 3802 events. 2148/3802 cut-off events. For 391644/391644 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25178 event pairs, 422 based on Foata normal form. 6/3804 useless extension candidates. Maximal degree in co-relation 26835. Up to 3203 conditions per place. [2024-06-14 14:10:46,907 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 345 selfloop transitions, 38 changer transitions 0/392 dead transitions. [2024-06-14 14:10:46,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 392 transitions, 5019 flow [2024-06-14 14:10:46,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:10:46,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:10:46,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 14:10:46,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5876623376623377 [2024-06-14 14:10:46,909 INFO L175 Difference]: Start difference. First operand has 325 places, 366 transitions, 4103 flow. Second operand 7 states and 181 transitions. [2024-06-14 14:10:46,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 392 transitions, 5019 flow [2024-06-14 14:10:48,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 392 transitions, 4934 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 14:10:48,765 INFO L231 Difference]: Finished difference. Result has 328 places, 367 transitions, 4128 flow [2024-06-14 14:10:48,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4019, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4128, PETRI_PLACES=328, PETRI_TRANSITIONS=367} [2024-06-14 14:10:48,766 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-14 14:10:48,766 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 367 transitions, 4128 flow [2024-06-14 14:10:48,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:48,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:48,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:48,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 14:10:48,766 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:48,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:48,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1394202132, now seen corresponding path program 7 times [2024-06-14 14:10:48,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:48,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328320508] [2024-06-14 14:10:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:48,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:49,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:49,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:49,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328320508] [2024-06-14 14:10:49,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328320508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:49,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:49,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:49,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220034700] [2024-06-14 14:10:49,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:49,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:49,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:49,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:49,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:49,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:49,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 367 transitions, 4128 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:49,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:49,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:49,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:50,028 INFO L124 PetriNetUnfolderBase]: 2169/3831 cut-off events. [2024-06-14 14:10:50,028 INFO L125 PetriNetUnfolderBase]: For 390860/390860 co-relation queries the response was YES. [2024-06-14 14:10:50,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27366 conditions, 3831 events. 2169/3831 cut-off events. For 390860/390860 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 25445 event pairs, 431 based on Foata normal form. 2/3822 useless extension candidates. Maximal degree in co-relation 27227. Up to 3179 conditions per place. [2024-06-14 14:10:50,078 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 310 selfloop transitions, 94 changer transitions 0/413 dead transitions. [2024-06-14 14:10:50,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 413 transitions, 5334 flow [2024-06-14 14:10:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:50,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:50,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 258 transitions. [2024-06-14 14:10:50,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863636363636363 [2024-06-14 14:10:50,080 INFO L175 Difference]: Start difference. First operand has 328 places, 367 transitions, 4128 flow. Second operand 10 states and 258 transitions. [2024-06-14 14:10:50,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 413 transitions, 5334 flow [2024-06-14 14:10:52,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 413 transitions, 5240 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 14:10:52,591 INFO L231 Difference]: Finished difference. Result has 334 places, 372 transitions, 4349 flow [2024-06-14 14:10:52,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4034, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4349, PETRI_PLACES=334, PETRI_TRANSITIONS=372} [2024-06-14 14:10:52,592 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-14 14:10:52,592 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 372 transitions, 4349 flow [2024-06-14 14:10:52,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:52,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:52,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:52,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 14:10:52,593 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:52,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:52,593 INFO L85 PathProgramCache]: Analyzing trace with hash -701152326, now seen corresponding path program 8 times [2024-06-14 14:10:52,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:52,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157622486] [2024-06-14 14:10:52,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:52,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:52,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:53,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:53,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157622486] [2024-06-14 14:10:53,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157622486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:53,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:53,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:53,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221054233] [2024-06-14 14:10:53,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:53,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:53,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:53,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:53,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:53,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:53,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 372 transitions, 4349 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:53,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:53,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:53,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:53,795 INFO L124 PetriNetUnfolderBase]: 2177/3848 cut-off events. [2024-06-14 14:10:53,796 INFO L125 PetriNetUnfolderBase]: For 400339/400339 co-relation queries the response was YES. [2024-06-14 14:10:53,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27754 conditions, 3848 events. 2177/3848 cut-off events. For 400339/400339 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 25556 event pairs, 438 based on Foata normal form. 2/3844 useless extension candidates. Maximal degree in co-relation 27613. Up to 3226 conditions per place. [2024-06-14 14:10:53,847 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 309 selfloop transitions, 92 changer transitions 0/410 dead transitions. [2024-06-14 14:10:53,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 410 transitions, 5293 flow [2024-06-14 14:10:53,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:10:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:10:53,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-14 14:10:53,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-14 14:10:53,947 INFO L175 Difference]: Start difference. First operand has 334 places, 372 transitions, 4349 flow. Second operand 10 states and 253 transitions. [2024-06-14 14:10:53,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 410 transitions, 5293 flow [2024-06-14 14:10:56,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 410 transitions, 5074 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-14 14:10:56,310 INFO L231 Difference]: Finished difference. Result has 338 places, 374 transitions, 4375 flow [2024-06-14 14:10:56,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4375, PETRI_PLACES=338, PETRI_TRANSITIONS=374} [2024-06-14 14:10:56,311 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 293 predicate places. [2024-06-14 14:10:56,311 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 374 transitions, 4375 flow [2024-06-14 14:10:56,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:56,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:56,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:56,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 14:10:56,312 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:56,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:56,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1485399656, now seen corresponding path program 9 times [2024-06-14 14:10:56,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:56,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119371250] [2024-06-14 14:10:56,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:56,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:10:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:10:56,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:10:56,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119371250] [2024-06-14 14:10:56,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119371250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:10:56,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:10:56,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:10:56,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232184189] [2024-06-14 14:10:56,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:10:56,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:10:56,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:10:56,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:10:56,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:10:56,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:10:56,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 374 transitions, 4375 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:56,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:10:56,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:10:56,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:10:57,549 INFO L124 PetriNetUnfolderBase]: 2185/3860 cut-off events. [2024-06-14 14:10:57,550 INFO L125 PetriNetUnfolderBase]: For 406021/406021 co-relation queries the response was YES. [2024-06-14 14:10:57,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27787 conditions, 3860 events. 2185/3860 cut-off events. For 406021/406021 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 25622 event pairs, 438 based on Foata normal form. 2/3856 useless extension candidates. Maximal degree in co-relation 27644. Up to 3238 conditions per place. [2024-06-14 14:10:57,600 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 307 selfloop transitions, 94 changer transitions 0/410 dead transitions. [2024-06-14 14:10:57,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 410 transitions, 5287 flow [2024-06-14 14:10:57,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:10:57,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:10:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 269 transitions. [2024-06-14 14:10:57,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5557851239669421 [2024-06-14 14:10:57,601 INFO L175 Difference]: Start difference. First operand has 338 places, 374 transitions, 4375 flow. Second operand 11 states and 269 transitions. [2024-06-14 14:10:57,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 410 transitions, 5287 flow [2024-06-14 14:10:59,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 410 transitions, 5094 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 14:10:59,810 INFO L231 Difference]: Finished difference. Result has 341 places, 376 transitions, 4405 flow [2024-06-14 14:10:59,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4182, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4405, PETRI_PLACES=341, PETRI_TRANSITIONS=376} [2024-06-14 14:10:59,811 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-14 14:10:59,811 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 376 transitions, 4405 flow [2024-06-14 14:10:59,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:10:59,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:10:59,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:10:59,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 14:10:59,812 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:10:59,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:10:59,813 INFO L85 PathProgramCache]: Analyzing trace with hash -459939432, now seen corresponding path program 10 times [2024-06-14 14:10:59,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:10:59,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010423469] [2024-06-14 14:10:59,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:10:59,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:10:59,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:00,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:00,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:00,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010423469] [2024-06-14 14:11:00,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010423469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:00,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:00,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:00,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561264349] [2024-06-14 14:11:00,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:00,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:00,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:00,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:00,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:00,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 376 transitions, 4405 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:00,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:00,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:00,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:00,997 INFO L124 PetriNetUnfolderBase]: 2193/3872 cut-off events. [2024-06-14 14:11:00,998 INFO L125 PetriNetUnfolderBase]: For 414037/414037 co-relation queries the response was YES. [2024-06-14 14:11:01,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27960 conditions, 3872 events. 2193/3872 cut-off events. For 414037/414037 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25705 event pairs, 438 based on Foata normal form. 2/3868 useless extension candidates. Maximal degree in co-relation 27816. Up to 3250 conditions per place. [2024-06-14 14:11:01,046 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 303 selfloop transitions, 94 changer transitions 0/406 dead transitions. [2024-06-14 14:11:01,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 406 transitions, 5297 flow [2024-06-14 14:11:01,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:01,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:01,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-14 14:11:01,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5433884297520661 [2024-06-14 14:11:01,048 INFO L175 Difference]: Start difference. First operand has 341 places, 376 transitions, 4405 flow. Second operand 11 states and 263 transitions. [2024-06-14 14:11:01,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 406 transitions, 5297 flow [2024-06-14 14:11:03,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 406 transitions, 5096 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-14 14:11:03,159 INFO L231 Difference]: Finished difference. Result has 343 places, 378 transitions, 4431 flow [2024-06-14 14:11:03,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4204, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4431, PETRI_PLACES=343, PETRI_TRANSITIONS=378} [2024-06-14 14:11:03,160 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-14 14:11:03,160 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 378 transitions, 4431 flow [2024-06-14 14:11:03,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:03,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:03,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:03,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 14:11:03,162 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:03,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:03,162 INFO L85 PathProgramCache]: Analyzing trace with hash -962072358, now seen corresponding path program 4 times [2024-06-14 14:11:03,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:03,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426947934] [2024-06-14 14:11:03,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:03,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:03,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:03,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:03,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426947934] [2024-06-14 14:11:03,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426947934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:03,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:03,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:03,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288724532] [2024-06-14 14:11:03,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:03,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:03,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:03,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:03,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:03,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:03,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 378 transitions, 4431 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:03,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:03,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:03,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:04,414 INFO L124 PetriNetUnfolderBase]: 2209/3901 cut-off events. [2024-06-14 14:11:04,414 INFO L125 PetriNetUnfolderBase]: For 417396/417396 co-relation queries the response was YES. [2024-06-14 14:11:04,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28191 conditions, 3901 events. 2209/3901 cut-off events. For 417396/417396 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 25955 event pairs, 439 based on Foata normal form. 1/3896 useless extension candidates. Maximal degree in co-relation 28046. Up to 3264 conditions per place. [2024-06-14 14:11:04,469 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 361 selfloop transitions, 52 changer transitions 0/422 dead transitions. [2024-06-14 14:11:04,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 422 transitions, 5443 flow [2024-06-14 14:11:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:11:04,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:11:04,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-14 14:11:04,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818181818181818 [2024-06-14 14:11:04,471 INFO L175 Difference]: Start difference. First operand has 343 places, 378 transitions, 4431 flow. Second operand 10 states and 256 transitions. [2024-06-14 14:11:04,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 422 transitions, 5443 flow [2024-06-14 14:11:07,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 422 transitions, 5238 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 14:11:07,107 INFO L231 Difference]: Finished difference. Result has 344 places, 384 transitions, 4432 flow [2024-06-14 14:11:07,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4226, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4432, PETRI_PLACES=344, PETRI_TRANSITIONS=384} [2024-06-14 14:11:07,108 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 299 predicate places. [2024-06-14 14:11:07,108 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 384 transitions, 4432 flow [2024-06-14 14:11:07,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:07,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:07,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:07,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 14:11:07,109 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:07,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:07,109 INFO L85 PathProgramCache]: Analyzing trace with hash -691892936, now seen corresponding path program 5 times [2024-06-14 14:11:07,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:07,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906747599] [2024-06-14 14:11:07,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:07,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:07,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:07,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:07,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906747599] [2024-06-14 14:11:07,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906747599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:07,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:07,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:07,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540255408] [2024-06-14 14:11:07,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:07,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:07,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:07,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:07,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:07,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:07,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 384 transitions, 4432 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:07,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:07,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:07,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:08,468 INFO L124 PetriNetUnfolderBase]: 2230/3933 cut-off events. [2024-06-14 14:11:08,468 INFO L125 PetriNetUnfolderBase]: For 437781/437781 co-relation queries the response was YES. [2024-06-14 14:11:08,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29051 conditions, 3933 events. 2230/3933 cut-off events. For 437781/437781 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 26227 event pairs, 445 based on Foata normal form. 1/3925 useless extension candidates. Maximal degree in co-relation 28905. Up to 3108 conditions per place. [2024-06-14 14:11:08,514 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 268 selfloop transitions, 158 changer transitions 0/435 dead transitions. [2024-06-14 14:11:08,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 435 transitions, 6452 flow [2024-06-14 14:11:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:11:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:11:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 264 transitions. [2024-06-14 14:11:08,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-14 14:11:08,515 INFO L175 Difference]: Start difference. First operand has 344 places, 384 transitions, 4432 flow. Second operand 10 states and 264 transitions. [2024-06-14 14:11:08,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 435 transitions, 6452 flow [2024-06-14 14:11:10,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 435 transitions, 6296 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-14 14:11:10,972 INFO L231 Difference]: Finished difference. Result has 347 places, 396 transitions, 4884 flow [2024-06-14 14:11:10,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4276, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4884, PETRI_PLACES=347, PETRI_TRANSITIONS=396} [2024-06-14 14:11:10,973 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-14 14:11:10,973 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 396 transitions, 4884 flow [2024-06-14 14:11:10,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:10,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:10,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:10,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 14:11:10,974 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:10,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:10,974 INFO L85 PathProgramCache]: Analyzing trace with hash 751114912, now seen corresponding path program 6 times [2024-06-14 14:11:10,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:10,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049616968] [2024-06-14 14:11:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:10,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:11,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:11,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049616968] [2024-06-14 14:11:11,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049616968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:11,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:11,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:11,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553996773] [2024-06-14 14:11:11,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:11,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:11,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:11,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:11,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:11,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:11,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 396 transitions, 4884 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:11,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:11,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:11,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:12,269 INFO L124 PetriNetUnfolderBase]: 2235/3945 cut-off events. [2024-06-14 14:11:12,269 INFO L125 PetriNetUnfolderBase]: For 449656/449656 co-relation queries the response was YES. [2024-06-14 14:11:12,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29729 conditions, 3945 events. 2235/3945 cut-off events. For 449656/449656 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 26361 event pairs, 439 based on Foata normal form. 1/3940 useless extension candidates. Maximal degree in co-relation 29582. Up to 3287 conditions per place. [2024-06-14 14:11:12,323 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 369 selfloop transitions, 66 changer transitions 0/444 dead transitions. [2024-06-14 14:11:12,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 444 transitions, 6142 flow [2024-06-14 14:11:12,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:11:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:11:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 318 transitions. [2024-06-14 14:11:12,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559440559440559 [2024-06-14 14:11:12,324 INFO L175 Difference]: Start difference. First operand has 347 places, 396 transitions, 4884 flow. Second operand 13 states and 318 transitions. [2024-06-14 14:11:12,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 444 transitions, 6142 flow [2024-06-14 14:11:14,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 444 transitions, 5844 flow, removed 101 selfloop flow, removed 3 redundant places. [2024-06-14 14:11:14,625 INFO L231 Difference]: Finished difference. Result has 358 places, 399 transitions, 4810 flow [2024-06-14 14:11:14,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4614, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4810, PETRI_PLACES=358, PETRI_TRANSITIONS=399} [2024-06-14 14:11:14,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-14 14:11:14,626 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 399 transitions, 4810 flow [2024-06-14 14:11:14,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:14,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:14,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:14,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 14:11:14,627 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:14,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:14,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1426062648, now seen corresponding path program 7 times [2024-06-14 14:11:14,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:14,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688383347] [2024-06-14 14:11:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:14,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:15,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:15,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688383347] [2024-06-14 14:11:15,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688383347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:15,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:15,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:15,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901163754] [2024-06-14 14:11:15,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:15,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:15,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:15,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:15,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:15,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:15,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 399 transitions, 4810 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:15,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:15,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:15,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:15,908 INFO L124 PetriNetUnfolderBase]: 2232/3941 cut-off events. [2024-06-14 14:11:15,909 INFO L125 PetriNetUnfolderBase]: For 451416/451416 co-relation queries the response was YES. [2024-06-14 14:11:15,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29662 conditions, 3941 events. 2232/3941 cut-off events. For 451416/451416 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 26371 event pairs, 439 based on Foata normal form. 1/3936 useless extension candidates. Maximal degree in co-relation 29512. Up to 3284 conditions per place. [2024-06-14 14:11:15,963 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 363 selfloop transitions, 66 changer transitions 0/438 dead transitions. [2024-06-14 14:11:15,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 438 transitions, 5766 flow [2024-06-14 14:11:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:15,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:15,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-06-14 14:11:15,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661157024793388 [2024-06-14 14:11:15,964 INFO L175 Difference]: Start difference. First operand has 358 places, 399 transitions, 4810 flow. Second operand 11 states and 274 transitions. [2024-06-14 14:11:15,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 438 transitions, 5766 flow [2024-06-14 14:11:18,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 438 transitions, 5582 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:18,729 INFO L231 Difference]: Finished difference. Result has 359 places, 399 transitions, 4764 flow [2024-06-14 14:11:18,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4626, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4764, PETRI_PLACES=359, PETRI_TRANSITIONS=399} [2024-06-14 14:11:18,730 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 314 predicate places. [2024-06-14 14:11:18,730 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 399 transitions, 4764 flow [2024-06-14 14:11:18,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:18,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:18,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:18,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 14:11:18,731 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:18,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:18,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1706992952, now seen corresponding path program 8 times [2024-06-14 14:11:18,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:18,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947765383] [2024-06-14 14:11:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:18,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:19,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:19,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947765383] [2024-06-14 14:11:19,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947765383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:19,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:19,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:19,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169729235] [2024-06-14 14:11:19,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:19,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:19,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:19,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:19,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:19,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:19,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 399 transitions, 4764 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:19,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:19,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:19,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:20,083 INFO L124 PetriNetUnfolderBase]: 2245/3960 cut-off events. [2024-06-14 14:11:20,084 INFO L125 PetriNetUnfolderBase]: For 465237/465237 co-relation queries the response was YES. [2024-06-14 14:11:20,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29959 conditions, 3960 events. 2245/3960 cut-off events. For 465237/465237 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26459 event pairs, 445 based on Foata normal form. 1/3952 useless extension candidates. Maximal degree in co-relation 29808. Up to 3126 conditions per place. [2024-06-14 14:11:20,135 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 259 selfloop transitions, 174 changer transitions 0/442 dead transitions. [2024-06-14 14:11:20,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 442 transitions, 6440 flow [2024-06-14 14:11:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:20,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:20,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 299 transitions. [2024-06-14 14:11:20,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5662878787878788 [2024-06-14 14:11:20,136 INFO L175 Difference]: Start difference. First operand has 359 places, 399 transitions, 4764 flow. Second operand 12 states and 299 transitions. [2024-06-14 14:11:20,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 442 transitions, 6440 flow [2024-06-14 14:11:23,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 442 transitions, 6308 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:23,519 INFO L231 Difference]: Finished difference. Result has 361 places, 405 transitions, 5094 flow [2024-06-14 14:11:23,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4632, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5094, PETRI_PLACES=361, PETRI_TRANSITIONS=405} [2024-06-14 14:11:23,519 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 316 predicate places. [2024-06-14 14:11:23,519 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 405 transitions, 5094 flow [2024-06-14 14:11:23,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:23,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:23,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:23,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 14:11:23,520 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:23,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:23,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1700326712, now seen corresponding path program 9 times [2024-06-14 14:11:23,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:23,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97163614] [2024-06-14 14:11:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:23,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:23,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:23,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:23,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97163614] [2024-06-14 14:11:23,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97163614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:23,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:23,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:23,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486889490] [2024-06-14 14:11:23,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:23,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:23,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:23,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:23,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:23,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:23,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 405 transitions, 5094 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:23,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:23,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:23,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:24,856 INFO L124 PetriNetUnfolderBase]: 2242/3956 cut-off events. [2024-06-14 14:11:24,856 INFO L125 PetriNetUnfolderBase]: For 469285/469285 co-relation queries the response was YES. [2024-06-14 14:11:24,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30129 conditions, 3956 events. 2242/3956 cut-off events. For 469285/469285 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26476 event pairs, 445 based on Foata normal form. 1/3948 useless extension candidates. Maximal degree in co-relation 29977. Up to 3123 conditions per place. [2024-06-14 14:11:24,903 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 260 selfloop transitions, 171 changer transitions 0/440 dead transitions. [2024-06-14 14:11:24,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 440 transitions, 6454 flow [2024-06-14 14:11:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:24,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 279 transitions. [2024-06-14 14:11:24,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5764462809917356 [2024-06-14 14:11:24,905 INFO L175 Difference]: Start difference. First operand has 361 places, 405 transitions, 5094 flow. Second operand 11 states and 279 transitions. [2024-06-14 14:11:24,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 440 transitions, 6454 flow [2024-06-14 14:11:28,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 440 transitions, 6091 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-14 14:11:28,625 INFO L231 Difference]: Finished difference. Result has 364 places, 405 transitions, 5079 flow [2024-06-14 14:11:28,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4731, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5079, PETRI_PLACES=364, PETRI_TRANSITIONS=405} [2024-06-14 14:11:28,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 319 predicate places. [2024-06-14 14:11:28,626 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 405 transitions, 5079 flow [2024-06-14 14:11:28,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:28,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:28,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:28,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 14:11:28,627 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:28,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:28,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1394540466, now seen corresponding path program 4 times [2024-06-14 14:11:28,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:28,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795374257] [2024-06-14 14:11:28,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:28,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:29,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:29,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795374257] [2024-06-14 14:11:29,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795374257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:29,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:29,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:29,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54509429] [2024-06-14 14:11:29,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:29,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:29,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:29,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:29,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:29,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:29,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 405 transitions, 5079 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:29,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:29,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:29,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:29,827 INFO L124 PetriNetUnfolderBase]: 2255/3980 cut-off events. [2024-06-14 14:11:29,828 INFO L125 PetriNetUnfolderBase]: For 483816/483816 co-relation queries the response was YES. [2024-06-14 14:11:29,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30457 conditions, 3980 events. 2255/3980 cut-off events. For 483816/483816 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 26611 event pairs, 442 based on Foata normal form. 1/3973 useless extension candidates. Maximal degree in co-relation 30305. Up to 3211 conditions per place. [2024-06-14 14:11:29,882 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 290 selfloop transitions, 153 changer transitions 0/452 dead transitions. [2024-06-14 14:11:29,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 452 transitions, 6887 flow [2024-06-14 14:11:29,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:11:29,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:11:29,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-06-14 14:11:29,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5954545454545455 [2024-06-14 14:11:29,883 INFO L175 Difference]: Start difference. First operand has 364 places, 405 transitions, 5079 flow. Second operand 10 states and 262 transitions. [2024-06-14 14:11:29,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 452 transitions, 6887 flow [2024-06-14 14:11:32,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 452 transitions, 6573 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 14:11:32,816 INFO L231 Difference]: Finished difference. Result has 366 places, 414 transitions, 5287 flow [2024-06-14 14:11:32,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4765, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5287, PETRI_PLACES=366, PETRI_TRANSITIONS=414} [2024-06-14 14:11:32,816 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 321 predicate places. [2024-06-14 14:11:32,816 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 414 transitions, 5287 flow [2024-06-14 14:11:32,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:32,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:32,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:32,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 14:11:32,817 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:32,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:32,817 INFO L85 PathProgramCache]: Analyzing trace with hash -814859146, now seen corresponding path program 5 times [2024-06-14 14:11:32,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:32,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39325920] [2024-06-14 14:11:32,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:32,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:33,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:33,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:33,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39325920] [2024-06-14 14:11:33,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39325920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:33,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:33,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:33,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267940522] [2024-06-14 14:11:33,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:33,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:33,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:33,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:33,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:33,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:33,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 414 transitions, 5287 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:33,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:33,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:33,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:34,051 INFO L124 PetriNetUnfolderBase]: 2268/4002 cut-off events. [2024-06-14 14:11:34,052 INFO L125 PetriNetUnfolderBase]: For 500625/500625 co-relation queries the response was YES. [2024-06-14 14:11:34,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31066 conditions, 4002 events. 2268/4002 cut-off events. For 500625/500625 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 26821 event pairs, 442 based on Foata normal form. 1/3995 useless extension candidates. Maximal degree in co-relation 30913. Up to 3226 conditions per place. [2024-06-14 14:11:34,111 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 286 selfloop transitions, 161 changer transitions 0/456 dead transitions. [2024-06-14 14:11:34,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 456 transitions, 7047 flow [2024-06-14 14:11:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 280 transitions. [2024-06-14 14:11:34,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785123966942148 [2024-06-14 14:11:34,112 INFO L175 Difference]: Start difference. First operand has 366 places, 414 transitions, 5287 flow. Second operand 11 states and 280 transitions. [2024-06-14 14:11:34,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 456 transitions, 7047 flow [2024-06-14 14:11:37,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 456 transitions, 6689 flow, removed 101 selfloop flow, removed 5 redundant places. [2024-06-14 14:11:37,952 INFO L231 Difference]: Finished difference. Result has 372 places, 420 transitions, 5405 flow [2024-06-14 14:11:37,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4993, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5405, PETRI_PLACES=372, PETRI_TRANSITIONS=420} [2024-06-14 14:11:37,952 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 327 predicate places. [2024-06-14 14:11:37,952 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 420 transitions, 5405 flow [2024-06-14 14:11:37,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:37,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:37,953 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, 1] [2024-06-14 14:11:37,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 14:11:37,953 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:37,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:37,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1713666136, now seen corresponding path program 6 times [2024-06-14 14:11:37,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:37,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452303969] [2024-06-14 14:11:37,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:37,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:38,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:38,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452303969] [2024-06-14 14:11:38,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452303969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:38,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:38,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:38,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321664889] [2024-06-14 14:11:38,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:38,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:38,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:38,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:38,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:38,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:38,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 420 transitions, 5405 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:38,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:38,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:38,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:39,233 INFO L124 PetriNetUnfolderBase]: 2265/3998 cut-off events. [2024-06-14 14:11:39,233 INFO L125 PetriNetUnfolderBase]: For 502822/502822 co-relation queries the response was YES. [2024-06-14 14:11:39,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31028 conditions, 3998 events. 2265/3998 cut-off events. For 502822/502822 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 26796 event pairs, 442 based on Foata normal form. 1/3991 useless extension candidates. Maximal degree in co-relation 30874. Up to 3223 conditions per place. [2024-06-14 14:11:39,282 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 283 selfloop transitions, 164 changer transitions 0/456 dead transitions. [2024-06-14 14:11:39,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 456 transitions, 6811 flow [2024-06-14 14:11:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:39,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:39,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 296 transitions. [2024-06-14 14:11:39,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-06-14 14:11:39,284 INFO L175 Difference]: Start difference. First operand has 372 places, 420 transitions, 5405 flow. Second operand 12 states and 296 transitions. [2024-06-14 14:11:39,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 456 transitions, 6811 flow [2024-06-14 14:11:42,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 456 transitions, 6501 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 14:11:42,742 INFO L231 Difference]: Finished difference. Result has 378 places, 420 transitions, 5429 flow [2024-06-14 14:11:42,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5095, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5429, PETRI_PLACES=378, PETRI_TRANSITIONS=420} [2024-06-14 14:11:42,743 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-14 14:11:42,743 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 420 transitions, 5429 flow [2024-06-14 14:11:42,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:42,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:42,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:42,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 14:11:42,744 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:42,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:42,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1879354474, now seen corresponding path program 10 times [2024-06-14 14:11:42,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:42,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132230391] [2024-06-14 14:11:42,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:42,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:43,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:43,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:43,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132230391] [2024-06-14 14:11:43,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132230391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:43,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:43,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:43,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693113739] [2024-06-14 14:11:43,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:43,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:43,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:43,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:43,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:43,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:43,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 420 transitions, 5429 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:43,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:43,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:43,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:43,897 INFO L124 PetriNetUnfolderBase]: 2286/4031 cut-off events. [2024-06-14 14:11:43,897 INFO L125 PetriNetUnfolderBase]: For 523831/523831 co-relation queries the response was YES. [2024-06-14 14:11:43,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31586 conditions, 4031 events. 2286/4031 cut-off events. For 523831/523831 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 27077 event pairs, 445 based on Foata normal form. 1/4023 useless extension candidates. Maximal degree in co-relation 31431. Up to 3179 conditions per place. [2024-06-14 14:11:43,951 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 266 selfloop transitions, 184 changer transitions 0/459 dead transitions. [2024-06-14 14:11:43,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 459 transitions, 7211 flow [2024-06-14 14:11:43,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:43,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-06-14 14:11:43,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661157024793388 [2024-06-14 14:11:43,953 INFO L175 Difference]: Start difference. First operand has 378 places, 420 transitions, 5429 flow. Second operand 11 states and 274 transitions. [2024-06-14 14:11:43,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 459 transitions, 7211 flow [2024-06-14 14:11:47,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 459 transitions, 6883 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-14 14:11:47,174 INFO L231 Difference]: Finished difference. Result has 379 places, 429 transitions, 5643 flow [2024-06-14 14:11:47,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5101, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5643, PETRI_PLACES=379, PETRI_TRANSITIONS=429} [2024-06-14 14:11:47,174 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-14 14:11:47,175 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 429 transitions, 5643 flow [2024-06-14 14:11:47,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:47,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:47,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:47,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 14:11:47,175 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:47,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:47,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1707049100, now seen corresponding path program 11 times [2024-06-14 14:11:47,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:47,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307375521] [2024-06-14 14:11:47,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:47,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:47,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:47,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307375521] [2024-06-14 14:11:47,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307375521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:47,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:47,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:47,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751580276] [2024-06-14 14:11:47,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:47,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:47,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:47,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:47,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:47,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:47,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 429 transitions, 5643 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:47,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:47,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:47,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:48,533 INFO L124 PetriNetUnfolderBase]: 2283/4027 cut-off events. [2024-06-14 14:11:48,534 INFO L125 PetriNetUnfolderBase]: For 527531/527531 co-relation queries the response was YES. [2024-06-14 14:11:48,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31609 conditions, 4027 events. 2283/4027 cut-off events. For 527531/527531 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 27058 event pairs, 445 based on Foata normal form. 1/4019 useless extension candidates. Maximal degree in co-relation 31453. Up to 3176 conditions per place. [2024-06-14 14:11:48,600 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 264 selfloop transitions, 186 changer transitions 0/459 dead transitions. [2024-06-14 14:11:48,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 459 transitions, 7047 flow [2024-06-14 14:11:48,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:48,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:48,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 290 transitions. [2024-06-14 14:11:48,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5492424242424242 [2024-06-14 14:11:48,601 INFO L175 Difference]: Start difference. First operand has 379 places, 429 transitions, 5643 flow. Second operand 12 states and 290 transitions. [2024-06-14 14:11:48,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 459 transitions, 7047 flow [2024-06-14 14:11:53,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 459 transitions, 6742 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 14:11:53,141 INFO L231 Difference]: Finished difference. Result has 386 places, 429 transitions, 5716 flow [2024-06-14 14:11:53,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5338, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5716, PETRI_PLACES=386, PETRI_TRANSITIONS=429} [2024-06-14 14:11:53,141 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-14 14:11:53,142 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 429 transitions, 5716 flow [2024-06-14 14:11:53,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:53,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:53,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:53,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 14:11:53,142 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:53,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:53,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1700375916, now seen corresponding path program 7 times [2024-06-14 14:11:53,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:53,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693877266] [2024-06-14 14:11:53,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:53,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:53,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:53,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:53,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693877266] [2024-06-14 14:11:53,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693877266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:53,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:53,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:53,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648105097] [2024-06-14 14:11:53,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:53,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:53,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:53,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:53,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:53,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:53,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 429 transitions, 5716 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:53,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:53,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:53,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:54,511 INFO L124 PetriNetUnfolderBase]: 2312/4077 cut-off events. [2024-06-14 14:11:54,511 INFO L125 PetriNetUnfolderBase]: For 555661/555661 co-relation queries the response was YES. [2024-06-14 14:11:54,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32368 conditions, 4077 events. 2312/4077 cut-off events. For 555661/555661 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27444 event pairs, 442 based on Foata normal form. 1/4070 useless extension candidates. Maximal degree in co-relation 32211. Up to 3281 conditions per place. [2024-06-14 14:11:54,567 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 293 selfloop transitions, 171 changer transitions 0/473 dead transitions. [2024-06-14 14:11:54,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 473 transitions, 7787 flow [2024-06-14 14:11:54,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:11:54,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:11:54,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 294 transitions. [2024-06-14 14:11:54,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 14:11:54,568 INFO L175 Difference]: Start difference. First operand has 386 places, 429 transitions, 5716 flow. Second operand 12 states and 294 transitions. [2024-06-14 14:11:54,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 473 transitions, 7787 flow [2024-06-14 14:11:58,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 473 transitions, 7471 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-14 14:11:58,443 INFO L231 Difference]: Finished difference. Result has 389 places, 441 transitions, 5943 flow [2024-06-14 14:11:58,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5400, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5943, PETRI_PLACES=389, PETRI_TRANSITIONS=441} [2024-06-14 14:11:58,443 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 344 predicate places. [2024-06-14 14:11:58,443 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 441 transitions, 5943 flow [2024-06-14 14:11:58,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:58,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:11:58,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:11:58,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 14:11:58,444 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:11:58,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:11:58,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1713708396, now seen corresponding path program 8 times [2024-06-14 14:11:58,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:11:58,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195749210] [2024-06-14 14:11:58,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:11:58,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:11:58,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:11:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:11:58,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:11:58,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195749210] [2024-06-14 14:11:58,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195749210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:11:58,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:11:58,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:11:58,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023755118] [2024-06-14 14:11:58,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:11:58,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:11:58,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:11:58,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:11:58,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:11:58,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:11:58,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 441 transitions, 5943 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:11:58,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:11:58,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:11:58,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:11:59,722 INFO L124 PetriNetUnfolderBase]: 2309/4073 cut-off events. [2024-06-14 14:11:59,723 INFO L125 PetriNetUnfolderBase]: For 559399/559399 co-relation queries the response was YES. [2024-06-14 14:11:59,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32311 conditions, 4073 events. 2309/4073 cut-off events. For 559399/559399 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27437 event pairs, 442 based on Foata normal form. 1/4066 useless extension candidates. Maximal degree in co-relation 32153. Up to 3278 conditions per place. [2024-06-14 14:11:59,783 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 293 selfloop transitions, 169 changer transitions 0/471 dead transitions. [2024-06-14 14:11:59,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 471 transitions, 7599 flow [2024-06-14 14:11:59,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:11:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:11:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-06-14 14:11:59,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661157024793388 [2024-06-14 14:11:59,785 INFO L175 Difference]: Start difference. First operand has 389 places, 441 transitions, 5943 flow. Second operand 11 states and 274 transitions. [2024-06-14 14:11:59,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 471 transitions, 7599 flow [2024-06-14 14:12:03,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 471 transitions, 7309 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 14:12:03,111 INFO L231 Difference]: Finished difference. Result has 394 places, 441 transitions, 5997 flow [2024-06-14 14:12:03,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5653, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5997, PETRI_PLACES=394, PETRI_TRANSITIONS=441} [2024-06-14 14:12:03,111 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-14 14:12:03,111 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 441 transitions, 5997 flow [2024-06-14 14:12:03,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:03,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:03,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:03,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 14:12:03,112 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:03,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:03,112 INFO L85 PathProgramCache]: Analyzing trace with hash -2058336458, now seen corresponding path program 9 times [2024-06-14 14:12:03,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:03,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062460875] [2024-06-14 14:12:03,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:03,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:03,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:03,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062460875] [2024-06-14 14:12:03,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062460875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:03,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:03,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:12:03,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286750021] [2024-06-14 14:12:03,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:03,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:12:03,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:03,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:12:03,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:12:03,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:03,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 441 transitions, 5997 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:03,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:03,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:03,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:04,390 INFO L124 PetriNetUnfolderBase]: 2306/4069 cut-off events. [2024-06-14 14:12:04,391 INFO L125 PetriNetUnfolderBase]: For 563240/563240 co-relation queries the response was YES. [2024-06-14 14:12:04,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32271 conditions, 4069 events. 2306/4069 cut-off events. For 563240/563240 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27446 event pairs, 442 based on Foata normal form. 1/4062 useless extension candidates. Maximal degree in co-relation 32112. Up to 3275 conditions per place. [2024-06-14 14:12:04,452 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 284 selfloop transitions, 178 changer transitions 0/471 dead transitions. [2024-06-14 14:12:04,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 471 transitions, 7437 flow [2024-06-14 14:12:04,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:12:04,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:12:04,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 290 transitions. [2024-06-14 14:12:04,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5492424242424242 [2024-06-14 14:12:04,453 INFO L175 Difference]: Start difference. First operand has 394 places, 441 transitions, 5997 flow. Second operand 12 states and 290 transitions. [2024-06-14 14:12:04,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 471 transitions, 7437 flow [2024-06-14 14:12:07,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 471 transitions, 7145 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 14:12:07,996 INFO L231 Difference]: Finished difference. Result has 400 places, 441 transitions, 6067 flow [2024-06-14 14:12:07,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5705, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6067, PETRI_PLACES=400, PETRI_TRANSITIONS=441} [2024-06-14 14:12:07,996 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 355 predicate places. [2024-06-14 14:12:07,996 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 441 transitions, 6067 flow [2024-06-14 14:12:07,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:07,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:07,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:07,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 14:12:07,997 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:07,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:07,997 INFO L85 PathProgramCache]: Analyzing trace with hash 692610712, now seen corresponding path program 1 times [2024-06-14 14:12:07,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:07,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001804109] [2024-06-14 14:12:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:07,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:08,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:08,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:08,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001804109] [2024-06-14 14:12:08,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001804109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:08,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:08,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:08,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775216480] [2024-06-14 14:12:08,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:08,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:08,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:08,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:08,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:08,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:08,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 441 transitions, 6067 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:08,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:08,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:08,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:09,253 INFO L124 PetriNetUnfolderBase]: 2327/4094 cut-off events. [2024-06-14 14:12:09,254 INFO L125 PetriNetUnfolderBase]: For 593063/593063 co-relation queries the response was YES. [2024-06-14 14:12:09,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32882 conditions, 4094 events. 2327/4094 cut-off events. For 593063/593063 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27582 event pairs, 429 based on Foata normal form. 2/4088 useless extension candidates. Maximal degree in co-relation 32722. Up to 3487 conditions per place. [2024-06-14 14:12:09,312 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 433 selfloop transitions, 34 changer transitions 0/476 dead transitions. [2024-06-14 14:12:09,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 476 transitions, 7393 flow [2024-06-14 14:12:09,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:12:09,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:12:09,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-14 14:12:09,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-06-14 14:12:09,314 INFO L175 Difference]: Start difference. First operand has 400 places, 441 transitions, 6067 flow. Second operand 9 states and 224 transitions. [2024-06-14 14:12:09,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 476 transitions, 7393 flow [2024-06-14 14:12:12,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 476 transitions, 7026 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-14 14:12:12,920 INFO L231 Difference]: Finished difference. Result has 398 places, 445 transitions, 5869 flow [2024-06-14 14:12:12,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5700, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5869, PETRI_PLACES=398, PETRI_TRANSITIONS=445} [2024-06-14 14:12:12,920 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 353 predicate places. [2024-06-14 14:12:12,920 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 445 transitions, 5869 flow [2024-06-14 14:12:12,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:12,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:12,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:12,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 14:12:12,921 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:12,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:12,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1091917736, now seen corresponding path program 2 times [2024-06-14 14:12:12,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:12,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143759704] [2024-06-14 14:12:12,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:12,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:13,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:13,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143759704] [2024-06-14 14:12:13,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143759704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:13,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:13,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:13,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757092355] [2024-06-14 14:12:13,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:13,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:13,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:13,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:13,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:13,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:13,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 445 transitions, 5869 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:13,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:13,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:13,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:14,182 INFO L124 PetriNetUnfolderBase]: 2322/4094 cut-off events. [2024-06-14 14:12:14,183 INFO L125 PetriNetUnfolderBase]: For 589134/589134 co-relation queries the response was YES. [2024-06-14 14:12:14,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32505 conditions, 4094 events. 2322/4094 cut-off events. For 589134/589134 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27608 event pairs, 437 based on Foata normal form. 2/4090 useless extension candidates. Maximal degree in co-relation 32344. Up to 3509 conditions per place. [2024-06-14 14:12:14,241 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 431 selfloop transitions, 30 changer transitions 0/470 dead transitions. [2024-06-14 14:12:14,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 470 transitions, 6853 flow [2024-06-14 14:12:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:14,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 14:12:14,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 14:12:14,243 INFO L175 Difference]: Start difference. First operand has 398 places, 445 transitions, 5869 flow. Second operand 8 states and 199 transitions. [2024-06-14 14:12:14,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 470 transitions, 6853 flow [2024-06-14 14:12:17,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 470 transitions, 6697 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 14:12:17,826 INFO L231 Difference]: Finished difference. Result has 400 places, 445 transitions, 5778 flow [2024-06-14 14:12:17,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5713, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5778, PETRI_PLACES=400, PETRI_TRANSITIONS=445} [2024-06-14 14:12:17,826 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 355 predicate places. [2024-06-14 14:12:17,826 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 445 transitions, 5778 flow [2024-06-14 14:12:17,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:17,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:17,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:17,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 14:12:17,827 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:17,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:17,827 INFO L85 PathProgramCache]: Analyzing trace with hash -808190922, now seen corresponding path program 3 times [2024-06-14 14:12:17,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:17,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378569300] [2024-06-14 14:12:17,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:17,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:18,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:18,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:18,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378569300] [2024-06-14 14:12:18,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378569300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:18,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:18,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:18,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360227834] [2024-06-14 14:12:18,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:18,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:18,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:18,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:18,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:18,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:18,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 445 transitions, 5778 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:18,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:18,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:18,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:19,021 INFO L124 PetriNetUnfolderBase]: 2330/4103 cut-off events. [2024-06-14 14:12:19,021 INFO L125 PetriNetUnfolderBase]: For 599165/599165 co-relation queries the response was YES. [2024-06-14 14:12:19,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32611 conditions, 4103 events. 2330/4103 cut-off events. For 599165/599165 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 27706 event pairs, 443 based on Foata normal form. 2/4096 useless extension candidates. Maximal degree in co-relation 32448. Up to 3446 conditions per place. [2024-06-14 14:12:19,081 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 371 selfloop transitions, 89 changer transitions 0/469 dead transitions. [2024-06-14 14:12:19,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 469 transitions, 6802 flow [2024-06-14 14:12:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 14:12:19,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5710227272727273 [2024-06-14 14:12:19,083 INFO L175 Difference]: Start difference. First operand has 400 places, 445 transitions, 5778 flow. Second operand 8 states and 201 transitions. [2024-06-14 14:12:19,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 469 transitions, 6802 flow [2024-06-14 14:12:23,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 469 transitions, 6743 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 14:12:23,084 INFO L231 Difference]: Finished difference. Result has 402 places, 447 transitions, 5956 flow [2024-06-14 14:12:23,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5719, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5956, PETRI_PLACES=402, PETRI_TRANSITIONS=447} [2024-06-14 14:12:23,084 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-14 14:12:23,084 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 447 transitions, 5956 flow [2024-06-14 14:12:23,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:23,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:23,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:23,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 14:12:23,085 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:23,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:23,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1426076536, now seen corresponding path program 1 times [2024-06-14 14:12:23,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:23,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173429496] [2024-06-14 14:12:23,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:23,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:23,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:23,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173429496] [2024-06-14 14:12:23,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173429496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:23,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:23,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:23,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552465022] [2024-06-14 14:12:23,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:23,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:23,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:23,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:23,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:23,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:23,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 447 transitions, 5956 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:23,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:23,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:23,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:24,683 INFO L124 PetriNetUnfolderBase]: 2335/4115 cut-off events. [2024-06-14 14:12:24,683 INFO L125 PetriNetUnfolderBase]: For 603656/603656 co-relation queries the response was YES. [2024-06-14 14:12:24,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33005 conditions, 4115 events. 2335/4115 cut-off events. For 603656/603656 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 27762 event pairs, 436 based on Foata normal form. 1/4110 useless extension candidates. Maximal degree in co-relation 32841. Up to 3531 conditions per place. [2024-06-14 14:12:24,774 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 434 selfloop transitions, 31 changer transitions 0/474 dead transitions. [2024-06-14 14:12:24,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 474 transitions, 7014 flow [2024-06-14 14:12:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:24,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 14:12:24,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 14:12:24,776 INFO L175 Difference]: Start difference. First operand has 402 places, 447 transitions, 5956 flow. Second operand 8 states and 199 transitions. [2024-06-14 14:12:24,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 474 transitions, 7014 flow [2024-06-14 14:12:29,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 474 transitions, 6793 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 14:12:29,437 INFO L231 Difference]: Finished difference. Result has 404 places, 450 transitions, 5877 flow [2024-06-14 14:12:29,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5735, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5877, PETRI_PLACES=404, PETRI_TRANSITIONS=450} [2024-06-14 14:12:29,438 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 359 predicate places. [2024-06-14 14:12:29,438 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 450 transitions, 5877 flow [2024-06-14 14:12:29,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:29,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:29,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:29,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 14:12:29,438 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:29,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:29,439 INFO L85 PathProgramCache]: Analyzing trace with hash -808185962, now seen corresponding path program 2 times [2024-06-14 14:12:29,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:29,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007660479] [2024-06-14 14:12:29,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:29,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:29,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:29,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:29,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007660479] [2024-06-14 14:12:29,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007660479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:29,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:29,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:29,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404172059] [2024-06-14 14:12:29,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:29,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:29,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:29,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:29,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:29,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:29,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 450 transitions, 5877 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:29,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:29,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:29,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:30,668 INFO L124 PetriNetUnfolderBase]: 2356/4144 cut-off events. [2024-06-14 14:12:30,668 INFO L125 PetriNetUnfolderBase]: For 627834/627834 co-relation queries the response was YES. [2024-06-14 14:12:30,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33730 conditions, 4144 events. 2356/4144 cut-off events. For 627834/627834 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28026 event pairs, 449 based on Foata normal form. 1/4133 useless extension candidates. Maximal degree in co-relation 33565. Up to 3354 conditions per place. [2024-06-14 14:12:30,722 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 349 selfloop transitions, 128 changer transitions 0/486 dead transitions. [2024-06-14 14:12:30,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 486 transitions, 7881 flow [2024-06-14 14:12:30,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:30,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:30,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-14 14:12:30,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-14 14:12:30,723 INFO L175 Difference]: Start difference. First operand has 404 places, 450 transitions, 5877 flow. Second operand 8 states and 209 transitions. [2024-06-14 14:12:30,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 486 transitions, 7881 flow [2024-06-14 14:12:35,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 486 transitions, 7761 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 14:12:35,168 INFO L231 Difference]: Finished difference. Result has 406 places, 462 transitions, 6321 flow [2024-06-14 14:12:35,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5757, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6321, PETRI_PLACES=406, PETRI_TRANSITIONS=462} [2024-06-14 14:12:35,169 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 361 predicate places. [2024-06-14 14:12:35,169 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 462 transitions, 6321 flow [2024-06-14 14:12:35,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:35,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:35,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:35,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 14:12:35,169 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:35,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:35,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1713673080, now seen corresponding path program 3 times [2024-06-14 14:12:35,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:35,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801600056] [2024-06-14 14:12:35,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:35,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:35,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:35,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801600056] [2024-06-14 14:12:35,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801600056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:35,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:35,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:35,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682707234] [2024-06-14 14:12:35,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:35,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:35,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:35,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:35,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 462 transitions, 6321 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:35,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:35,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:35,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:36,427 INFO L124 PetriNetUnfolderBase]: 2353/4140 cut-off events. [2024-06-14 14:12:36,428 INFO L125 PetriNetUnfolderBase]: For 634563/634563 co-relation queries the response was YES. [2024-06-14 14:12:36,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34071 conditions, 4140 events. 2353/4140 cut-off events. For 634563/634563 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 27955 event pairs, 449 based on Foata normal form. 1/4129 useless extension candidates. Maximal degree in co-relation 33905. Up to 3351 conditions per place. [2024-06-14 14:12:36,490 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 347 selfloop transitions, 129 changer transitions 0/485 dead transitions. [2024-06-14 14:12:36,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 485 transitions, 7797 flow [2024-06-14 14:12:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:36,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:36,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 14:12:36,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-14 14:12:36,492 INFO L175 Difference]: Start difference. First operand has 406 places, 462 transitions, 6321 flow. Second operand 8 states and 207 transitions. [2024-06-14 14:12:36,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 485 transitions, 7797 flow [2024-06-14 14:12:41,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 485 transitions, 7608 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-06-14 14:12:41,533 INFO L231 Difference]: Finished difference. Result has 412 places, 462 transitions, 6396 flow [2024-06-14 14:12:41,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6132, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6396, PETRI_PLACES=412, PETRI_TRANSITIONS=462} [2024-06-14 14:12:41,534 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-14 14:12:41,534 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 462 transitions, 6396 flow [2024-06-14 14:12:41,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:41,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:41,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:41,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 14:12:41,535 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:41,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:41,535 INFO L85 PathProgramCache]: Analyzing trace with hash -801510794, now seen corresponding path program 1 times [2024-06-14 14:12:41,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:41,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890649612] [2024-06-14 14:12:41,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:41,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:41,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:41,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:41,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890649612] [2024-06-14 14:12:41,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890649612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:41,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:41,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:41,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799505808] [2024-06-14 14:12:41,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:41,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:41,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:41,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:41,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:41,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:41,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 462 transitions, 6396 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:41,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:41,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:41,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:42,746 INFO L124 PetriNetUnfolderBase]: 2361/4157 cut-off events. [2024-06-14 14:12:42,746 INFO L125 PetriNetUnfolderBase]: For 652167/652167 co-relation queries the response was YES. [2024-06-14 14:12:42,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34452 conditions, 4157 events. 2361/4157 cut-off events. For 652167/652167 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 28077 event pairs, 439 based on Foata normal form. 2/4151 useless extension candidates. Maximal degree in co-relation 34284. Up to 3514 conditions per place. [2024-06-14 14:12:42,809 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 386 selfloop transitions, 91 changer transitions 0/486 dead transitions. [2024-06-14 14:12:42,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 486 transitions, 7462 flow [2024-06-14 14:12:42,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:42,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-14 14:12:42,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:12:42,811 INFO L175 Difference]: Start difference. First operand has 412 places, 462 transitions, 6396 flow. Second operand 8 states and 200 transitions. [2024-06-14 14:12:42,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 486 transitions, 7462 flow [2024-06-14 14:12:47,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 486 transitions, 7192 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:12:47,575 INFO L231 Difference]: Finished difference. Result has 413 places, 464 transitions, 6375 flow [2024-06-14 14:12:47,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6375, PETRI_PLACES=413, PETRI_TRANSITIONS=464} [2024-06-14 14:12:47,576 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 368 predicate places. [2024-06-14 14:12:47,576 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 464 transitions, 6375 flow [2024-06-14 14:12:47,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:47,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:47,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:47,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 14:12:47,577 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:47,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash -863469544, now seen corresponding path program 4 times [2024-06-14 14:12:47,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:47,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610680849] [2024-06-14 14:12:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:47,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:47,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:47,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610680849] [2024-06-14 14:12:47,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610680849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:47,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:47,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:47,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567596518] [2024-06-14 14:12:47,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:47,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:47,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:47,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:47,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:47,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:47,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 464 transitions, 6375 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:47,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:47,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:47,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:48,792 INFO L124 PetriNetUnfolderBase]: 2369/4171 cut-off events. [2024-06-14 14:12:48,792 INFO L125 PetriNetUnfolderBase]: For 663083/663083 co-relation queries the response was YES. [2024-06-14 14:12:48,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34679 conditions, 4171 events. 2369/4171 cut-off events. For 663083/663083 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 28194 event pairs, 444 based on Foata normal form. 2/4164 useless extension candidates. Maximal degree in co-relation 34510. Up to 3502 conditions per place. [2024-06-14 14:12:48,859 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 385 selfloop transitions, 91 changer transitions 0/485 dead transitions. [2024-06-14 14:12:48,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 485 transitions, 7433 flow [2024-06-14 14:12:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:48,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:48,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 14:12:48,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-14 14:12:48,860 INFO L175 Difference]: Start difference. First operand has 413 places, 464 transitions, 6375 flow. Second operand 8 states and 197 transitions. [2024-06-14 14:12:48,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 485 transitions, 7433 flow [2024-06-14 14:12:54,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 485 transitions, 7200 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-14 14:12:54,298 INFO L231 Difference]: Finished difference. Result has 415 places, 466 transitions, 6393 flow [2024-06-14 14:12:54,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6142, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6393, PETRI_PLACES=415, PETRI_TRANSITIONS=466} [2024-06-14 14:12:54,299 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 370 predicate places. [2024-06-14 14:12:54,299 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 466 transitions, 6393 flow [2024-06-14 14:12:54,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:54,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:12:54,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:12:54,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 14:12:54,299 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:12:54,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:12:54,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1700368972, now seen corresponding path program 4 times [2024-06-14 14:12:54,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:12:54,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891057495] [2024-06-14 14:12:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:12:54,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:12:54,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:12:54,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:12:54,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:12:54,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891057495] [2024-06-14 14:12:54,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891057495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:12:54,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:12:54,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:12:54,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461492848] [2024-06-14 14:12:54,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:12:54,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:12:54,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:12:54,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:12:54,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:12:54,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:12:54,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 466 transitions, 6393 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:12:54,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:12:54,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:12:54,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:12:55,675 INFO L124 PetriNetUnfolderBase]: 2398/4216 cut-off events. [2024-06-14 14:12:55,676 INFO L125 PetriNetUnfolderBase]: For 689433/689433 co-relation queries the response was YES. [2024-06-14 14:12:55,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35583 conditions, 4216 events. 2398/4216 cut-off events. For 689433/689433 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 28587 event pairs, 451 based on Foata normal form. 1/4205 useless extension candidates. Maximal degree in co-relation 35413. Up to 3408 conditions per place. [2024-06-14 14:12:55,731 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 351 selfloop transitions, 140 changer transitions 0/500 dead transitions. [2024-06-14 14:12:55,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 500 transitions, 8669 flow [2024-06-14 14:12:55,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:12:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:12:55,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-14 14:12:55,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880681818181818 [2024-06-14 14:12:55,733 INFO L175 Difference]: Start difference. First operand has 415 places, 466 transitions, 6393 flow. Second operand 8 states and 207 transitions. [2024-06-14 14:12:55,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 500 transitions, 8669 flow [2024-06-14 14:13:00,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 500 transitions, 8434 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 14:13:00,702 INFO L231 Difference]: Finished difference. Result has 417 places, 478 transitions, 6726 flow [2024-06-14 14:13:00,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6158, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6726, PETRI_PLACES=417, PETRI_TRANSITIONS=478} [2024-06-14 14:13:00,703 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 372 predicate places. [2024-06-14 14:13:00,703 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 478 transitions, 6726 flow [2024-06-14 14:13:00,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:00,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:00,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 14:13:00,704 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:00,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:00,704 INFO L85 PathProgramCache]: Analyzing trace with hash -863464584, now seen corresponding path program 5 times [2024-06-14 14:13:00,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:00,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939731302] [2024-06-14 14:13:00,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:01,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:01,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:01,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939731302] [2024-06-14 14:13:01,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939731302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:01,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:01,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:13:01,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997583889] [2024-06-14 14:13:01,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:01,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:13:01,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:01,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:13:01,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:13:01,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:01,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 478 transitions, 6726 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:01,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:01,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:01,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:01,902 INFO L124 PetriNetUnfolderBase]: 2395/4212 cut-off events. [2024-06-14 14:13:01,903 INFO L125 PetriNetUnfolderBase]: For 692535/692535 co-relation queries the response was YES. [2024-06-14 14:13:01,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35513 conditions, 4212 events. 2395/4212 cut-off events. For 692535/692535 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 28577 event pairs, 451 based on Foata normal form. 1/4201 useless extension candidates. Maximal degree in co-relation 35342. Up to 3405 conditions per place. [2024-06-14 14:13:01,967 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 349 selfloop transitions, 141 changer transitions 0/499 dead transitions. [2024-06-14 14:13:01,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 499 transitions, 8482 flow [2024-06-14 14:13:01,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:13:01,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:13:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-14 14:13:01,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823863636363636 [2024-06-14 14:13:01,969 INFO L175 Difference]: Start difference. First operand has 417 places, 478 transitions, 6726 flow. Second operand 8 states and 205 transitions. [2024-06-14 14:13:01,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 499 transitions, 8482 flow [2024-06-14 14:13:06,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 499 transitions, 8216 flow, removed 61 selfloop flow, removed 2 redundant places. [2024-06-14 14:13:06,905 INFO L231 Difference]: Finished difference. Result has 423 places, 478 transitions, 6748 flow [2024-06-14 14:13:06,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6460, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6748, PETRI_PLACES=423, PETRI_TRANSITIONS=478} [2024-06-14 14:13:06,905 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 378 predicate places. [2024-06-14 14:13:06,906 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 478 transitions, 6748 flow [2024-06-14 14:13:06,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:06,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:06,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:06,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 14:13:06,906 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:06,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:06,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1982195930, now seen corresponding path program 6 times [2024-06-14 14:13:06,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:06,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514369909] [2024-06-14 14:13:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:06,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:06,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:07,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:07,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514369909] [2024-06-14 14:13:07,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514369909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:07,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:07,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:13:07,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659842172] [2024-06-14 14:13:07,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:07,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:13:07,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:07,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:13:07,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:13:07,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:07,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 478 transitions, 6748 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:07,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:07,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:07,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:08,183 INFO L124 PetriNetUnfolderBase]: 2392/4208 cut-off events. [2024-06-14 14:13:08,183 INFO L125 PetriNetUnfolderBase]: For 696080/696080 co-relation queries the response was YES. [2024-06-14 14:13:08,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35385 conditions, 4208 events. 2392/4208 cut-off events. For 696080/696080 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 28520 event pairs, 451 based on Foata normal form. 1/4197 useless extension candidates. Maximal degree in co-relation 35213. Up to 3402 conditions per place. [2024-06-14 14:13:08,248 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 342 selfloop transitions, 147 changer transitions 0/498 dead transitions. [2024-06-14 14:13:08,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 498 transitions, 8262 flow [2024-06-14 14:13:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:13:08,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:13:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-14 14:13:08,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767045454545454 [2024-06-14 14:13:08,249 INFO L175 Difference]: Start difference. First operand has 423 places, 478 transitions, 6748 flow. Second operand 8 states and 203 transitions. [2024-06-14 14:13:08,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 498 transitions, 8262 flow [2024-06-14 14:13:12,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 498 transitions, 7938 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 14:13:12,213 INFO L231 Difference]: Finished difference. Result has 425 places, 478 transitions, 6724 flow [2024-06-14 14:13:12,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6424, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6724, PETRI_PLACES=425, PETRI_TRANSITIONS=478} [2024-06-14 14:13:12,213 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-14 14:13:12,213 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 478 transitions, 6724 flow [2024-06-14 14:13:12,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:12,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:12,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:12,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 14:13:12,214 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:12,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1700360044, now seen corresponding path program 2 times [2024-06-14 14:13:12,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:12,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378487993] [2024-06-14 14:13:12,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:12,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:12,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:12,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:12,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378487993] [2024-06-14 14:13:12,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378487993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:12,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:12,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:13:12,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128392268] [2024-06-14 14:13:12,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:12,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:13:12,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:12,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:13:12,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:13:12,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:12,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 478 transitions, 6724 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:12,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:12,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:12,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:13,462 INFO L124 PetriNetUnfolderBase]: 2400/4225 cut-off events. [2024-06-14 14:13:13,462 INFO L125 PetriNetUnfolderBase]: For 714731/714731 co-relation queries the response was YES. [2024-06-14 14:13:13,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35593 conditions, 4225 events. 2400/4225 cut-off events. For 714731/714731 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 28672 event pairs, 441 based on Foata normal form. 2/4219 useless extension candidates. Maximal degree in co-relation 35420. Up to 3570 conditions per place. [2024-06-14 14:13:13,542 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 401 selfloop transitions, 89 changer transitions 0/499 dead transitions. [2024-06-14 14:13:13,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 499 transitions, 7814 flow [2024-06-14 14:13:13,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:13:13,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:13:13,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:13:13,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-14 14:13:13,543 INFO L175 Difference]: Start difference. First operand has 425 places, 478 transitions, 6724 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:13:13,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 499 transitions, 7814 flow [2024-06-14 14:13:16,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 499 transitions, 7517 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 14:13:16,717 INFO L231 Difference]: Finished difference. Result has 426 places, 480 transitions, 6678 flow [2024-06-14 14:13:16,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6427, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6678, PETRI_PLACES=426, PETRI_TRANSITIONS=480} [2024-06-14 14:13:16,717 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-14 14:13:16,717 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 480 transitions, 6678 flow [2024-06-14 14:13:16,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:16,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:16,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:16,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 14:13:16,718 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:16,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1470671434, now seen corresponding path program 3 times [2024-06-14 14:13:16,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:16,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469628528] [2024-06-14 14:13:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:16,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:17,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:17,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469628528] [2024-06-14 14:13:17,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469628528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:17,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:17,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:13:17,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926564394] [2024-06-14 14:13:17,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:17,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:13:17,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:17,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:13:17,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:13:17,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:17,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 480 transitions, 6678 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:17,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:17,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:17,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:18,049 INFO L124 PetriNetUnfolderBase]: 2408/4241 cut-off events. [2024-06-14 14:13:18,050 INFO L125 PetriNetUnfolderBase]: For 725835/725835 co-relation queries the response was YES. [2024-06-14 14:13:18,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35792 conditions, 4241 events. 2408/4241 cut-off events. For 725835/725835 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 28827 event pairs, 443 based on Foata normal form. 2/4235 useless extension candidates. Maximal degree in co-relation 35618. Up to 3582 conditions per place. [2024-06-14 14:13:18,105 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 401 selfloop transitions, 91 changer transitions 0/501 dead transitions. [2024-06-14 14:13:18,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 501 transitions, 7776 flow [2024-06-14 14:13:18,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:13:18,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:13:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 14:13:18,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-14 14:13:18,106 INFO L175 Difference]: Start difference. First operand has 426 places, 480 transitions, 6678 flow. Second operand 8 states and 197 transitions. [2024-06-14 14:13:18,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 501 transitions, 7776 flow [2024-06-14 14:13:22,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 501 transitions, 7541 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 14:13:22,254 INFO L231 Difference]: Finished difference. Result has 428 places, 482 transitions, 6702 flow [2024-06-14 14:13:22,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6443, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6702, PETRI_PLACES=428, PETRI_TRANSITIONS=482} [2024-06-14 14:13:22,254 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-14 14:13:22,254 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 482 transitions, 6702 flow [2024-06-14 14:13:22,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:22,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:22,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:22,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 14:13:22,255 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:22,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:22,255 INFO L85 PathProgramCache]: Analyzing trace with hash -2043203436, now seen corresponding path program 4 times [2024-06-14 14:13:22,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:22,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545034112] [2024-06-14 14:13:22,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:22,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:22,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:22,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:22,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545034112] [2024-06-14 14:13:22,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545034112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:22,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:22,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:13:22,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816460912] [2024-06-14 14:13:22,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:22,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:13:22,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:22,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:13:22,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:13:22,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:22,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 482 transitions, 6702 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:22,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:22,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:22,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:23,547 INFO L124 PetriNetUnfolderBase]: 2429/4272 cut-off events. [2024-06-14 14:13:23,548 INFO L125 PetriNetUnfolderBase]: For 754526/754526 co-relation queries the response was YES. [2024-06-14 14:13:23,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36523 conditions, 4272 events. 2429/4272 cut-off events. For 754526/754526 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 28996 event pairs, 442 based on Foata normal form. 2/4266 useless extension candidates. Maximal degree in co-relation 36348. Up to 3578 conditions per place. [2024-06-14 14:13:23,614 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 400 selfloop transitions, 99 changer transitions 0/508 dead transitions. [2024-06-14 14:13:23,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 508 transitions, 8157 flow [2024-06-14 14:13:23,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:13:23,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:13:23,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 14:13:23,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653409090909091 [2024-06-14 14:13:23,616 INFO L175 Difference]: Start difference. First operand has 428 places, 482 transitions, 6702 flow. Second operand 8 states and 199 transitions. [2024-06-14 14:13:23,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 508 transitions, 8157 flow [2024-06-14 14:13:27,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 508 transitions, 7914 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 14:13:27,744 INFO L231 Difference]: Finished difference. Result has 431 places, 487 transitions, 6839 flow [2024-06-14 14:13:27,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6459, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6839, PETRI_PLACES=431, PETRI_TRANSITIONS=487} [2024-06-14 14:13:27,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 386 predicate places. [2024-06-14 14:13:27,745 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 487 transitions, 6839 flow [2024-06-14 14:13:27,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:27,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:27,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:27,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 14:13:27,745 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:27,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:27,745 INFO L85 PathProgramCache]: Analyzing trace with hash -473431596, now seen corresponding path program 11 times [2024-06-14 14:13:27,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:27,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332635163] [2024-06-14 14:13:27,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:27,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:27,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:28,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:28,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332635163] [2024-06-14 14:13:28,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332635163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:28,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:28,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:13:28,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017136213] [2024-06-14 14:13:28,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:28,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:13:28,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:28,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:13:28,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:13:28,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:28,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 487 transitions, 6839 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:28,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:28,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:28,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:29,196 INFO L124 PetriNetUnfolderBase]: 2437/4283 cut-off events. [2024-06-14 14:13:29,196 INFO L125 PetriNetUnfolderBase]: For 768931/768931 co-relation queries the response was YES. [2024-06-14 14:13:29,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36846 conditions, 4283 events. 2437/4283 cut-off events. For 768931/768931 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 29088 event pairs, 436 based on Foata normal form. 2/4273 useless extension candidates. Maximal degree in co-relation 36669. Up to 3605 conditions per place. [2024-06-14 14:13:29,262 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 439 selfloop transitions, 75 changer transitions 0/523 dead transitions. [2024-06-14 14:13:29,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 523 transitions, 8353 flow [2024-06-14 14:13:29,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:13:29,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:13:29,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-14 14:13:29,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5732323232323232 [2024-06-14 14:13:29,263 INFO L175 Difference]: Start difference. First operand has 431 places, 487 transitions, 6839 flow. Second operand 9 states and 227 transitions. [2024-06-14 14:13:29,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 523 transitions, 8353 flow [2024-06-14 14:13:33,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 523 transitions, 8143 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-14 14:13:33,177 INFO L231 Difference]: Finished difference. Result has 437 places, 492 transitions, 6956 flow [2024-06-14 14:13:33,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6629, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6956, PETRI_PLACES=437, PETRI_TRANSITIONS=492} [2024-06-14 14:13:33,177 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 392 predicate places. [2024-06-14 14:13:33,177 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 492 transitions, 6956 flow [2024-06-14 14:13:33,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:33,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:33,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:33,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 14:13:33,178 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:33,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:33,178 INFO L85 PathProgramCache]: Analyzing trace with hash 458192822, now seen corresponding path program 12 times [2024-06-14 14:13:33,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:33,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296080036] [2024-06-14 14:13:33,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:33,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:33,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:33,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:33,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296080036] [2024-06-14 14:13:33,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296080036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:33,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:33,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:13:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842508482] [2024-06-14 14:13:33,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:33,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:13:33,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:33,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:13:33,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:13:33,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:33,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 492 transitions, 6956 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:33,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:33,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:33,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:34,610 INFO L124 PetriNetUnfolderBase]: 2445/4300 cut-off events. [2024-06-14 14:13:34,610 INFO L125 PetriNetUnfolderBase]: For 781038/781038 co-relation queries the response was YES. [2024-06-14 14:13:34,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37135 conditions, 4300 events. 2445/4300 cut-off events. For 781038/781038 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 29238 event pairs, 443 based on Foata normal form. 2/4295 useless extension candidates. Maximal degree in co-relation 36955. Up to 3611 conditions per place. [2024-06-14 14:13:34,685 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 426 selfloop transitions, 92 changer transitions 0/527 dead transitions. [2024-06-14 14:13:34,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 527 transitions, 8150 flow [2024-06-14 14:13:34,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:13:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:13:34,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 249 transitions. [2024-06-14 14:13:34,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5659090909090909 [2024-06-14 14:13:34,687 INFO L175 Difference]: Start difference. First operand has 437 places, 492 transitions, 6956 flow. Second operand 10 states and 249 transitions. [2024-06-14 14:13:34,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 527 transitions, 8150 flow [2024-06-14 14:13:39,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 527 transitions, 7906 flow, removed 79 selfloop flow, removed 5 redundant places. [2024-06-14 14:13:39,678 INFO L231 Difference]: Finished difference. Result has 442 places, 494 transitions, 6981 flow [2024-06-14 14:13:39,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6754, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6981, PETRI_PLACES=442, PETRI_TRANSITIONS=494} [2024-06-14 14:13:39,678 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 397 predicate places. [2024-06-14 14:13:39,679 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 494 transitions, 6981 flow [2024-06-14 14:13:39,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:39,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:39,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:39,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 14:13:39,679 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:39,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:39,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1836825098, now seen corresponding path program 13 times [2024-06-14 14:13:39,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:39,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529298806] [2024-06-14 14:13:39,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:39,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:39,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:40,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:40,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529298806] [2024-06-14 14:13:40,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529298806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:40,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:40,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:13:40,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892560768] [2024-06-14 14:13:40,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:40,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:13:40,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:40,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:13:40,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:13:40,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:40,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 494 transitions, 6981 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:40,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:40,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:40,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:41,148 INFO L124 PetriNetUnfolderBase]: 2453/4312 cut-off events. [2024-06-14 14:13:41,148 INFO L125 PetriNetUnfolderBase]: For 788640/788640 co-relation queries the response was YES. [2024-06-14 14:13:41,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37079 conditions, 4312 events. 2453/4312 cut-off events. For 788640/788640 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 29270 event pairs, 443 based on Foata normal form. 2/4307 useless extension candidates. Maximal degree in co-relation 36897. Up to 3623 conditions per place. [2024-06-14 14:13:41,216 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 429 selfloop transitions, 93 changer transitions 0/531 dead transitions. [2024-06-14 14:13:41,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 531 transitions, 8149 flow [2024-06-14 14:13:41,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:13:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:13:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 289 transitions. [2024-06-14 14:13:41,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473484848484849 [2024-06-14 14:13:41,217 INFO L175 Difference]: Start difference. First operand has 442 places, 494 transitions, 6981 flow. Second operand 12 states and 289 transitions. [2024-06-14 14:13:41,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 531 transitions, 8149 flow [2024-06-14 14:13:46,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 531 transitions, 7956 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 14:13:46,606 INFO L231 Difference]: Finished difference. Result has 447 places, 496 transitions, 7021 flow [2024-06-14 14:13:46,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6788, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7021, PETRI_PLACES=447, PETRI_TRANSITIONS=496} [2024-06-14 14:13:46,607 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 402 predicate places. [2024-06-14 14:13:46,607 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 496 transitions, 7021 flow [2024-06-14 14:13:46,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:46,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:46,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:46,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 14:13:46,608 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:46,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:46,608 INFO L85 PathProgramCache]: Analyzing trace with hash -606067692, now seen corresponding path program 14 times [2024-06-14 14:13:46,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:46,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550429147] [2024-06-14 14:13:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:46,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:46,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:47,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:47,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550429147] [2024-06-14 14:13:47,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550429147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:47,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:47,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:13:47,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41443212] [2024-06-14 14:13:47,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:47,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:13:47,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:47,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:13:47,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:13:47,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:47,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 496 transitions, 7021 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:47,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:47,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:47,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:48,151 INFO L124 PetriNetUnfolderBase]: 2461/4324 cut-off events. [2024-06-14 14:13:48,151 INFO L125 PetriNetUnfolderBase]: For 800686/800686 co-relation queries the response was YES. [2024-06-14 14:13:48,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37259 conditions, 4324 events. 2461/4324 cut-off events. For 800686/800686 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29371 event pairs, 443 based on Foata normal form. 2/4319 useless extension candidates. Maximal degree in co-relation 37075. Up to 3635 conditions per place. [2024-06-14 14:13:48,213 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 422 selfloop transitions, 95 changer transitions 0/526 dead transitions. [2024-06-14 14:13:48,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 526 transitions, 8165 flow [2024-06-14 14:13:48,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:13:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:13:48,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 262 transitions. [2024-06-14 14:13:48,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5413223140495868 [2024-06-14 14:13:48,215 INFO L175 Difference]: Start difference. First operand has 447 places, 496 transitions, 7021 flow. Second operand 11 states and 262 transitions. [2024-06-14 14:13:48,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 526 transitions, 8165 flow [2024-06-14 14:13:53,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 526 transitions, 7958 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 14:13:53,423 INFO L231 Difference]: Finished difference. Result has 449 places, 498 transitions, 7055 flow [2024-06-14 14:13:53,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6814, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7055, PETRI_PLACES=449, PETRI_TRANSITIONS=498} [2024-06-14 14:13:53,424 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-14 14:13:53,424 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 498 transitions, 7055 flow [2024-06-14 14:13:53,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:53,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:13:53,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:13:53,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 14:13:53,425 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:13:53,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:13:53,425 INFO L85 PathProgramCache]: Analyzing trace with hash 308180662, now seen corresponding path program 15 times [2024-06-14 14:13:53,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:13:53,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927046267] [2024-06-14 14:13:53,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:13:53,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:13:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:13:53,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:13:53,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:13:53,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927046267] [2024-06-14 14:13:53,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927046267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:13:53,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:13:53,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:13:53,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913473028] [2024-06-14 14:13:53,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:13:53,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:13:53,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:13:53,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:13:53,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:13:53,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:13:53,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 498 transitions, 7055 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:13:53,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:13:53,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:13:53,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:13:54,853 INFO L124 PetriNetUnfolderBase]: 2456/4312 cut-off events. [2024-06-14 14:13:54,853 INFO L125 PetriNetUnfolderBase]: For 795488/795488 co-relation queries the response was YES. [2024-06-14 14:13:54,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37004 conditions, 4312 events. 2456/4312 cut-off events. For 795488/795488 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29283 event pairs, 451 based on Foata normal form. 2/4305 useless extension candidates. Maximal degree in co-relation 36819. Up to 3628 conditions per place. [2024-06-14 14:13:54,924 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 417 selfloop transitions, 95 changer transitions 0/521 dead transitions. [2024-06-14 14:13:54,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 521 transitions, 8156 flow [2024-06-14 14:13:54,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:13:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:13:54,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 256 transitions. [2024-06-14 14:13:54,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5289256198347108 [2024-06-14 14:13:54,925 INFO L175 Difference]: Start difference. First operand has 449 places, 498 transitions, 7055 flow. Second operand 11 states and 256 transitions. [2024-06-14 14:13:54,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 521 transitions, 8156 flow [2024-06-14 14:14:00,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 521 transitions, 7893 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-14 14:14:00,282 INFO L231 Difference]: Finished difference. Result has 451 places, 499 transitions, 7014 flow [2024-06-14 14:14:00,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7014, PETRI_PLACES=451, PETRI_TRANSITIONS=499} [2024-06-14 14:14:00,282 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 406 predicate places. [2024-06-14 14:14:00,282 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 499 transitions, 7014 flow [2024-06-14 14:14:00,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:00,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:00,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:00,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 14:14:00,283 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:00,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:00,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1347560468, now seen corresponding path program 16 times [2024-06-14 14:14:00,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:00,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641501010] [2024-06-14 14:14:00,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:00,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:00,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:00,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641501010] [2024-06-14 14:14:00,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641501010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:00,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:00,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:00,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326713898] [2024-06-14 14:14:00,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:00,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:00,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:00,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:00,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:00,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:00,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 499 transitions, 7014 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:00,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:00,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:00,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:01,710 INFO L124 PetriNetUnfolderBase]: 2451/4305 cut-off events. [2024-06-14 14:14:01,711 INFO L125 PetriNetUnfolderBase]: For 788442/788442 co-relation queries the response was YES. [2024-06-14 14:14:01,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36600 conditions, 4305 events. 2451/4305 cut-off events. For 788442/788442 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29241 event pairs, 450 based on Foata normal form. 2/4298 useless extension candidates. Maximal degree in co-relation 36414. Up to 3621 conditions per place. [2024-06-14 14:14:01,783 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 420 selfloop transitions, 94 changer transitions 0/523 dead transitions. [2024-06-14 14:14:01,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 523 transitions, 8115 flow [2024-06-14 14:14:01,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:14:01,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:14:01,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 277 transitions. [2024-06-14 14:14:01,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5246212121212122 [2024-06-14 14:14:01,785 INFO L175 Difference]: Start difference. First operand has 451 places, 499 transitions, 7014 flow. Second operand 12 states and 277 transitions. [2024-06-14 14:14:01,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 523 transitions, 8115 flow [2024-06-14 14:14:08,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 523 transitions, 7914 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-14 14:14:08,079 INFO L231 Difference]: Finished difference. Result has 455 places, 500 transitions, 7027 flow [2024-06-14 14:14:08,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6821, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7027, PETRI_PLACES=455, PETRI_TRANSITIONS=500} [2024-06-14 14:14:08,080 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-14 14:14:08,080 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 500 transitions, 7027 flow [2024-06-14 14:14:08,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:08,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:08,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:08,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 14:14:08,080 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:08,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:08,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1066630164, now seen corresponding path program 17 times [2024-06-14 14:14:08,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:08,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212892489] [2024-06-14 14:14:08,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:08,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:08,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:08,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212892489] [2024-06-14 14:14:08,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212892489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:08,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:08,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:08,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593413870] [2024-06-14 14:14:08,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:08,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:08,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:08,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:08,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:08,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:08,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 500 transitions, 7027 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:08,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:08,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:08,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:09,489 INFO L124 PetriNetUnfolderBase]: 2446/4300 cut-off events. [2024-06-14 14:14:09,490 INFO L125 PetriNetUnfolderBase]: For 781727/781727 co-relation queries the response was YES. [2024-06-14 14:14:09,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36311 conditions, 4300 events. 2446/4300 cut-off events. For 781727/781727 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29236 event pairs, 444 based on Foata normal form. 2/4294 useless extension candidates. Maximal degree in co-relation 36124. Up to 3719 conditions per place. [2024-06-14 14:14:09,559 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 475 selfloop transitions, 29 changer transitions 0/513 dead transitions. [2024-06-14 14:14:09,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 513 transitions, 8081 flow [2024-06-14 14:14:09,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:14:09,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:14:09,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 14:14:09,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487012987012987 [2024-06-14 14:14:09,560 INFO L175 Difference]: Start difference. First operand has 455 places, 500 transitions, 7027 flow. Second operand 7 states and 169 transitions. [2024-06-14 14:14:09,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 513 transitions, 8081 flow [2024-06-14 14:14:14,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 513 transitions, 7860 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-14 14:14:14,864 INFO L231 Difference]: Finished difference. Result has 452 places, 501 transitions, 6889 flow [2024-06-14 14:14:14,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6814, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6889, PETRI_PLACES=452, PETRI_TRANSITIONS=501} [2024-06-14 14:14:14,864 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 407 predicate places. [2024-06-14 14:14:14,864 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 501 transitions, 6889 flow [2024-06-14 14:14:14,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:14,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:14,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:14,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 14:14:14,865 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:14,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:14,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1063773204, now seen corresponding path program 18 times [2024-06-14 14:14:14,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:14,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942167072] [2024-06-14 14:14:14,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:14,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:15,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:15,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942167072] [2024-06-14 14:14:15,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942167072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:15,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:15,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:15,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274194866] [2024-06-14 14:14:15,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:15,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:15,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:15,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:15,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:15,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:15,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 501 transitions, 6889 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:15,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:15,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:15,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:16,261 INFO L124 PetriNetUnfolderBase]: 2441/4291 cut-off events. [2024-06-14 14:14:16,261 INFO L125 PetriNetUnfolderBase]: For 774594/774594 co-relation queries the response was YES. [2024-06-14 14:14:16,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35850 conditions, 4291 events. 2441/4291 cut-off events. For 774594/774594 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 29177 event pairs, 439 based on Foata normal form. 2/4283 useless extension candidates. Maximal degree in co-relation 35662. Up to 3698 conditions per place. [2024-06-14 14:14:16,332 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 474 selfloop transitions, 33 changer transitions 0/516 dead transitions. [2024-06-14 14:14:16,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 516 transitions, 7952 flow [2024-06-14 14:14:16,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:14:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:14:16,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 14:14:16,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5397727272727273 [2024-06-14 14:14:16,333 INFO L175 Difference]: Start difference. First operand has 452 places, 501 transitions, 6889 flow. Second operand 8 states and 190 transitions. [2024-06-14 14:14:16,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 516 transitions, 7952 flow [2024-06-14 14:14:22,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 516 transitions, 7869 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 14:14:22,163 INFO L231 Difference]: Finished difference. Result has 455 places, 502 transitions, 6896 flow [2024-06-14 14:14:22,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6814, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6896, PETRI_PLACES=455, PETRI_TRANSITIONS=502} [2024-06-14 14:14:22,163 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 410 predicate places. [2024-06-14 14:14:22,164 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 502 transitions, 6896 flow [2024-06-14 14:14:22,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:22,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:22,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:22,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 14:14:22,164 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:22,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:22,165 INFO L85 PathProgramCache]: Analyzing trace with hash -45779084, now seen corresponding path program 12 times [2024-06-14 14:14:22,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:22,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840824639] [2024-06-14 14:14:22,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:22,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:22,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:22,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840824639] [2024-06-14 14:14:22,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840824639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:22,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:22,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:22,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779395057] [2024-06-14 14:14:22,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:22,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:22,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:22,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:22,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:22,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:22,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 502 transitions, 6896 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:22,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:22,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:22,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:23,668 INFO L124 PetriNetUnfolderBase]: 2473/4354 cut-off events. [2024-06-14 14:14:23,668 INFO L125 PetriNetUnfolderBase]: For 794539/794539 co-relation queries the response was YES. [2024-06-14 14:14:23,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36541 conditions, 4354 events. 2473/4354 cut-off events. For 794539/794539 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 29696 event pairs, 436 based on Foata normal form. 1/4350 useless extension candidates. Maximal degree in co-relation 36352. Up to 3628 conditions per place. [2024-06-14 14:14:23,740 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 487 selfloop transitions, 65 changer transitions 0/561 dead transitions. [2024-06-14 14:14:23,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 561 transitions, 8881 flow [2024-06-14 14:14:23,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:14:23,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:14:23,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 339 transitions. [2024-06-14 14:14:23,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5503246753246753 [2024-06-14 14:14:23,742 INFO L175 Difference]: Start difference. First operand has 455 places, 502 transitions, 6896 flow. Second operand 14 states and 339 transitions. [2024-06-14 14:14:23,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 561 transitions, 8881 flow [2024-06-14 14:14:29,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 561 transitions, 8814 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 14:14:29,509 INFO L231 Difference]: Finished difference. Result has 463 places, 514 transitions, 7200 flow [2024-06-14 14:14:29,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6829, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7200, PETRI_PLACES=463, PETRI_TRANSITIONS=514} [2024-06-14 14:14:29,510 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 418 predicate places. [2024-06-14 14:14:29,510 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 514 transitions, 7200 flow [2024-06-14 14:14:29,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:29,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:29,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:29,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 14:14:29,510 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:29,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:29,511 INFO L85 PathProgramCache]: Analyzing trace with hash -34351244, now seen corresponding path program 13 times [2024-06-14 14:14:29,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:29,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629630959] [2024-06-14 14:14:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:29,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:29,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:29,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629630959] [2024-06-14 14:14:29,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629630959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:29,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:29,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:29,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16019989] [2024-06-14 14:14:29,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:29,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:29,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:29,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:29,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:29,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:29,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 514 transitions, 7200 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:29,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:29,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:29,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:31,036 INFO L124 PetriNetUnfolderBase]: 2470/4350 cut-off events. [2024-06-14 14:14:31,036 INFO L125 PetriNetUnfolderBase]: For 797317/797317 co-relation queries the response was YES. [2024-06-14 14:14:31,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36609 conditions, 4350 events. 2470/4350 cut-off events. For 797317/797317 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 29673 event pairs, 436 based on Foata normal form. 1/4346 useless extension candidates. Maximal degree in co-relation 36419. Up to 3625 conditions per place. [2024-06-14 14:14:31,101 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 481 selfloop transitions, 65 changer transitions 0/555 dead transitions. [2024-06-14 14:14:31,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 555 transitions, 8664 flow [2024-06-14 14:14:31,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:14:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:14:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 295 transitions. [2024-06-14 14:14:31,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587121212121212 [2024-06-14 14:14:31,103 INFO L175 Difference]: Start difference. First operand has 463 places, 514 transitions, 7200 flow. Second operand 12 states and 295 transitions. [2024-06-14 14:14:31,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 555 transitions, 8664 flow [2024-06-14 14:14:36,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 555 transitions, 8474 flow, removed 62 selfloop flow, removed 8 redundant places. [2024-06-14 14:14:36,505 INFO L231 Difference]: Finished difference. Result has 467 places, 514 transitions, 7146 flow [2024-06-14 14:14:36,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7010, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7146, PETRI_PLACES=467, PETRI_TRANSITIONS=514} [2024-06-14 14:14:36,506 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 422 predicate places. [2024-06-14 14:14:36,506 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 514 transitions, 7146 flow [2024-06-14 14:14:36,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:36,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:36,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:36,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 14:14:36,507 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:36,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash 717483914, now seen corresponding path program 14 times [2024-06-14 14:14:36,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:36,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858246229] [2024-06-14 14:14:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:36,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:36,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:36,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:36,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:36,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858246229] [2024-06-14 14:14:36,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858246229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:36,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:36,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:36,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138687518] [2024-06-14 14:14:36,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:36,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:36,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:36,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:36,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:37,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:37,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 514 transitions, 7146 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:37,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:37,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:37,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:38,140 INFO L124 PetriNetUnfolderBase]: 2467/4346 cut-off events. [2024-06-14 14:14:38,141 INFO L125 PetriNetUnfolderBase]: For 798269/798269 co-relation queries the response was YES. [2024-06-14 14:14:38,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36564 conditions, 4346 events. 2467/4346 cut-off events. For 798269/798269 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 29625 event pairs, 436 based on Foata normal form. 1/4342 useless extension candidates. Maximal degree in co-relation 36372. Up to 3631 conditions per place. [2024-06-14 14:14:38,206 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 485 selfloop transitions, 55 changer transitions 0/549 dead transitions. [2024-06-14 14:14:38,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 549 transitions, 8314 flow [2024-06-14 14:14:38,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:14:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:14:38,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 250 transitions. [2024-06-14 14:14:38,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:14:38,207 INFO L175 Difference]: Start difference. First operand has 467 places, 514 transitions, 7146 flow. Second operand 10 states and 250 transitions. [2024-06-14 14:14:38,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 549 transitions, 8314 flow [2024-06-14 14:14:43,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 549 transitions, 8158 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-14 14:14:43,885 INFO L231 Difference]: Finished difference. Result has 466 places, 514 transitions, 7106 flow [2024-06-14 14:14:43,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6990, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7106, PETRI_PLACES=466, PETRI_TRANSITIONS=514} [2024-06-14 14:14:43,886 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 421 predicate places. [2024-06-14 14:14:43,886 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 514 transitions, 7106 flow [2024-06-14 14:14:43,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:43,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:43,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:43,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 14:14:43,886 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:43,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:43,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2142660468, now seen corresponding path program 15 times [2024-06-14 14:14:43,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:43,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720313013] [2024-06-14 14:14:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:43,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:44,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:44,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720313013] [2024-06-14 14:14:44,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720313013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:44,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:44,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:44,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195898473] [2024-06-14 14:14:44,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:44,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:44,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:44,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:44,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:44,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:44,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 514 transitions, 7106 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:44,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:44,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:44,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:45,299 INFO L124 PetriNetUnfolderBase]: 2480/4366 cut-off events. [2024-06-14 14:14:45,300 INFO L125 PetriNetUnfolderBase]: For 819382/819382 co-relation queries the response was YES. [2024-06-14 14:14:45,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36932 conditions, 4366 events. 2480/4366 cut-off events. For 819382/819382 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 29771 event pairs, 439 based on Foata normal form. 1/4360 useless extension candidates. Maximal degree in co-relation 36739. Up to 3450 conditions per place. [2024-06-14 14:14:45,371 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 352 selfloop transitions, 194 changer transitions 0/555 dead transitions. [2024-06-14 14:14:45,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 555 transitions, 9248 flow [2024-06-14 14:14:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:14:45,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:14:45,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-14 14:14:45,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5840909090909091 [2024-06-14 14:14:45,373 INFO L175 Difference]: Start difference. First operand has 466 places, 514 transitions, 7106 flow. Second operand 10 states and 257 transitions. [2024-06-14 14:14:45,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 555 transitions, 9248 flow [2024-06-14 14:14:51,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 555 transitions, 9134 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 14:14:51,822 INFO L231 Difference]: Finished difference. Result has 467 places, 520 transitions, 7528 flow [2024-06-14 14:14:51,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6992, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7528, PETRI_PLACES=467, PETRI_TRANSITIONS=520} [2024-06-14 14:14:51,823 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 422 predicate places. [2024-06-14 14:14:51,823 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 520 transitions, 7528 flow [2024-06-14 14:14:51,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:51,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:51,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:51,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 14:14:51,823 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:51,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:51,824 INFO L85 PathProgramCache]: Analyzing trace with hash 239912820, now seen corresponding path program 16 times [2024-06-14 14:14:51,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:51,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592784838] [2024-06-14 14:14:51,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:51,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:52,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:52,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:52,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592784838] [2024-06-14 14:14:52,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592784838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:52,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:52,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:52,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223165117] [2024-06-14 14:14:52,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:52,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:52,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:52,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:52,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:52,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:52,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 520 transitions, 7528 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:52,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:52,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:52,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:14:53,427 INFO L124 PetriNetUnfolderBase]: 2485/4375 cut-off events. [2024-06-14 14:14:53,427 INFO L125 PetriNetUnfolderBase]: For 832392/832392 co-relation queries the response was YES. [2024-06-14 14:14:53,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37392 conditions, 4375 events. 2485/4375 cut-off events. For 832392/832392 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 29901 event pairs, 439 based on Foata normal form. 1/4369 useless extension candidates. Maximal degree in co-relation 37198. Up to 3456 conditions per place. [2024-06-14 14:14:53,503 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 352 selfloop transitions, 200 changer transitions 0/561 dead transitions. [2024-06-14 14:14:53,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 561 transitions, 9905 flow [2024-06-14 14:14:53,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:14:53,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:14:53,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 300 transitions. [2024-06-14 14:14:53,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:14:53,504 INFO L175 Difference]: Start difference. First operand has 467 places, 520 transitions, 7528 flow. Second operand 12 states and 300 transitions. [2024-06-14 14:14:53,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 561 transitions, 9905 flow [2024-06-14 14:14:59,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 561 transitions, 9382 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-14 14:14:59,531 INFO L231 Difference]: Finished difference. Result has 472 places, 523 transitions, 7488 flow [2024-06-14 14:14:59,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7029, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7488, PETRI_PLACES=472, PETRI_TRANSITIONS=523} [2024-06-14 14:14:59,532 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 427 predicate places. [2024-06-14 14:14:59,532 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 523 transitions, 7488 flow [2024-06-14 14:14:59,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:59,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:14:59,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:14:59,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 14:14:59,533 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:14:59,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:14:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash 246579060, now seen corresponding path program 17 times [2024-06-14 14:14:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:14:59,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246445895] [2024-06-14 14:14:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:14:59,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:14:59,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:14:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:14:59,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:14:59,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246445895] [2024-06-14 14:14:59,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246445895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:14:59,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:14:59,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:14:59,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52119548] [2024-06-14 14:14:59,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:14:59,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:14:59,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:14:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:14:59,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:14:59,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:14:59,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 523 transitions, 7488 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:14:59,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:14:59,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:14:59,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:00,907 INFO L124 PetriNetUnfolderBase]: 2490/4384 cut-off events. [2024-06-14 14:15:00,908 INFO L125 PetriNetUnfolderBase]: For 842317/842317 co-relation queries the response was YES. [2024-06-14 14:15:00,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37395 conditions, 4384 events. 2490/4384 cut-off events. For 842317/842317 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 29974 event pairs, 439 based on Foata normal form. 1/4378 useless extension candidates. Maximal degree in co-relation 37200. Up to 3462 conditions per place. [2024-06-14 14:15:00,983 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 350 selfloop transitions, 205 changer transitions 0/564 dead transitions. [2024-06-14 14:15:00,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 564 transitions, 9583 flow [2024-06-14 14:15:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:15:00,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:15:00,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 318 transitions. [2024-06-14 14:15:00,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559440559440559 [2024-06-14 14:15:00,985 INFO L175 Difference]: Start difference. First operand has 472 places, 523 transitions, 7488 flow. Second operand 13 states and 318 transitions. [2024-06-14 14:15:00,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 564 transitions, 9583 flow [2024-06-14 14:15:06,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 564 transitions, 9050 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-14 14:15:06,097 INFO L231 Difference]: Finished difference. Result has 475 places, 526 transitions, 7430 flow [2024-06-14 14:15:06,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6964, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7430, PETRI_PLACES=475, PETRI_TRANSITIONS=526} [2024-06-14 14:15:06,097 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 430 predicate places. [2024-06-14 14:15:06,098 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 526 transitions, 7430 flow [2024-06-14 14:15:06,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:06,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:06,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:06,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 14:15:06,098 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:06,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:06,099 INFO L85 PathProgramCache]: Analyzing trace with hash -42819656, now seen corresponding path program 18 times [2024-06-14 14:15:06,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:06,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141678588] [2024-06-14 14:15:06,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:06,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:06,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:06,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:06,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141678588] [2024-06-14 14:15:06,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141678588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:06,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:06,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:15:06,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311811943] [2024-06-14 14:15:06,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:06,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:15:06,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:06,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:15:06,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:15:06,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:15:06,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 526 transitions, 7430 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:06,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:06,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:15:06,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:07,699 INFO L124 PetriNetUnfolderBase]: 2495/4395 cut-off events. [2024-06-14 14:15:07,699 INFO L125 PetriNetUnfolderBase]: For 850636/850636 co-relation queries the response was YES. [2024-06-14 14:15:07,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37225 conditions, 4395 events. 2495/4395 cut-off events. For 850636/850636 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30032 event pairs, 436 based on Foata normal form. 1/4391 useless extension candidates. Maximal degree in co-relation 37029. Up to 3626 conditions per place. [2024-06-14 14:15:07,790 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 464 selfloop transitions, 99 changer transitions 0/572 dead transitions. [2024-06-14 14:15:07,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 572 transitions, 9002 flow [2024-06-14 14:15:07,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:15:07,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:15:07,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 333 transitions. [2024-06-14 14:15:07,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5405844155844156 [2024-06-14 14:15:07,791 INFO L175 Difference]: Start difference. First operand has 475 places, 526 transitions, 7430 flow. Second operand 14 states and 333 transitions. [2024-06-14 14:15:07,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 572 transitions, 9002 flow [2024-06-14 14:15:13,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 572 transitions, 8554 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-06-14 14:15:13,834 INFO L231 Difference]: Finished difference. Result has 480 places, 529 transitions, 7260 flow [2024-06-14 14:15:13,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6988, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7260, PETRI_PLACES=480, PETRI_TRANSITIONS=529} [2024-06-14 14:15:13,835 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 435 predicate places. [2024-06-14 14:15:13,835 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 529 transitions, 7260 flow [2024-06-14 14:15:13,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:13,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:13,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:13,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 14:15:13,836 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:13,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash -31391816, now seen corresponding path program 19 times [2024-06-14 14:15:13,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:13,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590286914] [2024-06-14 14:15:13,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:13,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:14,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:14,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:14,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590286914] [2024-06-14 14:15:14,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590286914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:14,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:14,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:15:14,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101901940] [2024-06-14 14:15:14,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:14,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:15:14,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:14,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:15:14,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:15:14,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:15:14,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 529 transitions, 7260 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:14,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:14,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:15:14,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:15,306 INFO L124 PetriNetUnfolderBase]: 2492/4391 cut-off events. [2024-06-14 14:15:15,307 INFO L125 PetriNetUnfolderBase]: For 850822/850822 co-relation queries the response was YES. [2024-06-14 14:15:15,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36904 conditions, 4391 events. 2492/4391 cut-off events. For 850822/850822 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30033 event pairs, 436 based on Foata normal form. 1/4387 useless extension candidates. Maximal degree in co-relation 36706. Up to 3623 conditions per place. [2024-06-14 14:15:15,380 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 465 selfloop transitions, 98 changer transitions 0/572 dead transitions. [2024-06-14 14:15:15,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 572 transitions, 8774 flow [2024-06-14 14:15:15,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:15:15,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:15:15,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 335 transitions. [2024-06-14 14:15:15,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5438311688311688 [2024-06-14 14:15:15,382 INFO L175 Difference]: Start difference. First operand has 480 places, 529 transitions, 7260 flow. Second operand 14 states and 335 transitions. [2024-06-14 14:15:15,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 572 transitions, 8774 flow [2024-06-14 14:15:22,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 572 transitions, 8464 flow, removed 30 selfloop flow, removed 13 redundant places. [2024-06-14 14:15:22,161 INFO L231 Difference]: Finished difference. Result has 481 places, 529 transitions, 7152 flow [2024-06-14 14:15:22,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6950, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7152, PETRI_PLACES=481, PETRI_TRANSITIONS=529} [2024-06-14 14:15:22,161 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 436 predicate places. [2024-06-14 14:15:22,161 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 529 transitions, 7152 flow [2024-06-14 14:15:22,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:22,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:22,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:22,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 14:15:22,162 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:22,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:22,162 INFO L85 PathProgramCache]: Analyzing trace with hash -343797900, now seen corresponding path program 20 times [2024-06-14 14:15:22,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:22,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390531981] [2024-06-14 14:15:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:22,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:22,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:22,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390531981] [2024-06-14 14:15:22,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390531981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:22,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:22,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:15:22,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583534910] [2024-06-14 14:15:22,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:22,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:15:22,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:22,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:15:22,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:15:22,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:15:22,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 529 transitions, 7152 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:22,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:22,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:15:22,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:23,593 INFO L124 PetriNetUnfolderBase]: 2489/4387 cut-off events. [2024-06-14 14:15:23,594 INFO L125 PetriNetUnfolderBase]: For 851844/851844 co-relation queries the response was YES. [2024-06-14 14:15:23,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36592 conditions, 4387 events. 2489/4387 cut-off events. For 851844/851844 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 30006 event pairs, 436 based on Foata normal form. 1/4383 useless extension candidates. Maximal degree in co-relation 36394. Up to 3620 conditions per place. [2024-06-14 14:15:23,664 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 456 selfloop transitions, 97 changer transitions 0/562 dead transitions. [2024-06-14 14:15:23,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 562 transitions, 8340 flow [2024-06-14 14:15:23,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:15:23,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:15:23,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-14 14:15:23,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495867768595041 [2024-06-14 14:15:23,666 INFO L175 Difference]: Start difference. First operand has 481 places, 529 transitions, 7152 flow. Second operand 11 states and 266 transitions. [2024-06-14 14:15:23,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 562 transitions, 8340 flow [2024-06-14 14:15:31,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 562 transitions, 8084 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-14 14:15:31,315 INFO L231 Difference]: Finished difference. Result has 479 places, 529 transitions, 7096 flow [2024-06-14 14:15:31,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6896, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7096, PETRI_PLACES=479, PETRI_TRANSITIONS=529} [2024-06-14 14:15:31,316 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 434 predicate places. [2024-06-14 14:15:31,316 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 529 transitions, 7096 flow [2024-06-14 14:15:31,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:31,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:31,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:31,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 14:15:31,317 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:31,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:31,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1804832662, now seen corresponding path program 21 times [2024-06-14 14:15:31,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:31,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045015783] [2024-06-14 14:15:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:31,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:31,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:31,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045015783] [2024-06-14 14:15:31,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045015783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:31,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:31,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:15:31,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212319635] [2024-06-14 14:15:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:31,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:15:31,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:31,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:15:31,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:15:31,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:15:31,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 529 transitions, 7096 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:31,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:31,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:15:31,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:33,135 INFO L124 PetriNetUnfolderBase]: 2502/4407 cut-off events. [2024-06-14 14:15:33,136 INFO L125 PetriNetUnfolderBase]: For 873820/873820 co-relation queries the response was YES. [2024-06-14 14:15:33,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36930 conditions, 4407 events. 2502/4407 cut-off events. For 873820/873820 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 30181 event pairs, 439 based on Foata normal form. 1/4401 useless extension candidates. Maximal degree in co-relation 36731. Up to 3477 conditions per place. [2024-06-14 14:15:33,224 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 332 selfloop transitions, 224 changer transitions 0/565 dead transitions. [2024-06-14 14:15:33,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 565 transitions, 8972 flow [2024-06-14 14:15:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:15:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:15:33,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 289 transitions. [2024-06-14 14:15:33,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473484848484849 [2024-06-14 14:15:33,225 INFO L175 Difference]: Start difference. First operand has 479 places, 529 transitions, 7096 flow. Second operand 12 states and 289 transitions. [2024-06-14 14:15:33,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 565 transitions, 8972 flow [2024-06-14 14:15:40,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 565 transitions, 8768 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 14:15:40,506 INFO L231 Difference]: Finished difference. Result has 480 places, 535 transitions, 7466 flow [2024-06-14 14:15:40,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6892, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7466, PETRI_PLACES=480, PETRI_TRANSITIONS=535} [2024-06-14 14:15:40,506 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 435 predicate places. [2024-06-14 14:15:40,506 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 535 transitions, 7466 flow [2024-06-14 14:15:40,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:40,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:40,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:40,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 14:15:40,507 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:40,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:40,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1503233096, now seen corresponding path program 22 times [2024-06-14 14:15:40,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:40,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520907292] [2024-06-14 14:15:40,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:40,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:41,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:41,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520907292] [2024-06-14 14:15:41,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520907292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:41,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:41,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:15:41,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614716532] [2024-06-14 14:15:41,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:41,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:15:41,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:41,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:15:41,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:15:41,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:15:41,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 535 transitions, 7466 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:41,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:41,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:15:41,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:42,308 INFO L124 PetriNetUnfolderBase]: 2507/4416 cut-off events. [2024-06-14 14:15:42,308 INFO L125 PetriNetUnfolderBase]: For 886797/886797 co-relation queries the response was YES. [2024-06-14 14:15:42,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37331 conditions, 4416 events. 2507/4416 cut-off events. For 886797/886797 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 30258 event pairs, 439 based on Foata normal form. 1/4410 useless extension candidates. Maximal degree in co-relation 37131. Up to 3483 conditions per place. [2024-06-14 14:15:42,376 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 339 selfloop transitions, 221 changer transitions 0/569 dead transitions. [2024-06-14 14:15:42,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 569 transitions, 9302 flow [2024-06-14 14:15:42,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:15:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:15:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 310 transitions. [2024-06-14 14:15:42,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541958041958042 [2024-06-14 14:15:42,378 INFO L175 Difference]: Start difference. First operand has 480 places, 535 transitions, 7466 flow. Second operand 13 states and 310 transitions. [2024-06-14 14:15:42,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 569 transitions, 9302 flow [2024-06-14 14:15:48,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 569 transitions, 8867 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-14 14:15:48,244 INFO L231 Difference]: Finished difference. Result has 484 places, 538 transitions, 7545 flow [2024-06-14 14:15:48,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7050, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7545, PETRI_PLACES=484, PETRI_TRANSITIONS=538} [2024-06-14 14:15:48,244 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 439 predicate places. [2024-06-14 14:15:48,245 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 538 transitions, 7545 flow [2024-06-14 14:15:48,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:48,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:48,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:48,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 14:15:48,245 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:48,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:48,246 INFO L85 PathProgramCache]: Analyzing trace with hash -606062732, now seen corresponding path program 23 times [2024-06-14 14:15:48,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:48,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75967363] [2024-06-14 14:15:48,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:48,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:48,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:48,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75967363] [2024-06-14 14:15:48,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75967363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:48,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:48,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:15:48,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281716290] [2024-06-14 14:15:48,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:48,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:15:48,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:48,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:15:48,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:15:48,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:15:48,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 538 transitions, 7545 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:48,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:48,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:15:48,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:49,838 INFO L124 PetriNetUnfolderBase]: 2504/4412 cut-off events. [2024-06-14 14:15:49,838 INFO L125 PetriNetUnfolderBase]: For 888497/888497 co-relation queries the response was YES. [2024-06-14 14:15:49,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37198 conditions, 4412 events. 2504/4412 cut-off events. For 888497/888497 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 30249 event pairs, 439 based on Foata normal form. 1/4406 useless extension candidates. Maximal degree in co-relation 36998. Up to 3480 conditions per place. [2024-06-14 14:15:49,905 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 337 selfloop transitions, 220 changer transitions 0/566 dead transitions. [2024-06-14 14:15:49,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 566 transitions, 9017 flow [2024-06-14 14:15:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:15:49,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:15:49,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 269 transitions. [2024-06-14 14:15:49,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5557851239669421 [2024-06-14 14:15:49,907 INFO L175 Difference]: Start difference. First operand has 484 places, 538 transitions, 7545 flow. Second operand 11 states and 269 transitions. [2024-06-14 14:15:49,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 566 transitions, 9017 flow [2024-06-14 14:15:57,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 566 transitions, 8506 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-14 14:15:57,185 INFO L231 Difference]: Finished difference. Result has 485 places, 538 transitions, 7480 flow [2024-06-14 14:15:57,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7034, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7480, PETRI_PLACES=485, PETRI_TRANSITIONS=538} [2024-06-14 14:15:57,197 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 440 predicate places. [2024-06-14 14:15:57,198 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 538 transitions, 7480 flow [2024-06-14 14:15:57,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:57,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:15:57,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:15:57,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 14:15:57,198 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:15:57,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:15:57,199 INFO L85 PathProgramCache]: Analyzing trace with hash 2142667412, now seen corresponding path program 10 times [2024-06-14 14:15:57,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:15:57,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194718673] [2024-06-14 14:15:57,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:15:57,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:15:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:15:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:15:57,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:15:57,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194718673] [2024-06-14 14:15:57,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194718673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:15:57,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:15:57,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:15:57,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615195036] [2024-06-14 14:15:57,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:15:57,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:15:57,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:15:57,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:15:57,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:15:57,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:15:57,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 538 transitions, 7480 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:15:57,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:15:57,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:15:57,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:15:58,670 INFO L124 PetriNetUnfolderBase]: 2509/4419 cut-off events. [2024-06-14 14:15:58,670 INFO L125 PetriNetUnfolderBase]: For 900074/900074 co-relation queries the response was YES. [2024-06-14 14:15:58,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37278 conditions, 4419 events. 2509/4419 cut-off events. For 900074/900074 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 30239 event pairs, 443 based on Foata normal form. 1/4411 useless extension candidates. Maximal degree in co-relation 37077. Up to 3569 conditions per place. [2024-06-14 14:15:58,764 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 392 selfloop transitions, 174 changer transitions 0/575 dead transitions. [2024-06-14 14:15:58,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 575 transitions, 9328 flow [2024-06-14 14:15:58,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:15:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:15:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 257 transitions. [2024-06-14 14:15:58,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5840909090909091 [2024-06-14 14:15:58,765 INFO L175 Difference]: Start difference. First operand has 485 places, 538 transitions, 7480 flow. Second operand 10 states and 257 transitions. [2024-06-14 14:15:58,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 575 transitions, 9328 flow [2024-06-14 14:16:07,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 575 transitions, 8877 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 14:16:07,693 INFO L231 Difference]: Finished difference. Result has 484 places, 541 transitions, 7431 flow [2024-06-14 14:16:07,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7029, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7431, PETRI_PLACES=484, PETRI_TRANSITIONS=541} [2024-06-14 14:16:07,694 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 439 predicate places. [2024-06-14 14:16:07,694 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 541 transitions, 7431 flow [2024-06-14 14:16:07,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:07,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:07,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:07,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 14:16:07,694 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:07,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:07,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1836813194, now seen corresponding path program 11 times [2024-06-14 14:16:07,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:07,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758273847] [2024-06-14 14:16:07,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:07,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:08,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:08,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758273847] [2024-06-14 14:16:08,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758273847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:08,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:08,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:16:08,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622210392] [2024-06-14 14:16:08,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:08,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:16:08,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:08,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:16:08,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:16:08,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:16:08,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 541 transitions, 7431 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:08,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:08,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:16:08,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:09,068 INFO L124 PetriNetUnfolderBase]: 2514/4428 cut-off events. [2024-06-14 14:16:09,068 INFO L125 PetriNetUnfolderBase]: For 911125/911125 co-relation queries the response was YES. [2024-06-14 14:16:09,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37285 conditions, 4428 events. 2514/4428 cut-off events. For 911125/911125 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 30329 event pairs, 443 based on Foata normal form. 1/4420 useless extension candidates. Maximal degree in co-relation 37083. Up to 3575 conditions per place. [2024-06-14 14:16:09,142 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 394 selfloop transitions, 178 changer transitions 0/581 dead transitions. [2024-06-14 14:16:09,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 581 transitions, 9601 flow [2024-06-14 14:16:09,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:16:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:16:09,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 301 transitions. [2024-06-14 14:16:09,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5700757575757576 [2024-06-14 14:16:09,143 INFO L175 Difference]: Start difference. First operand has 484 places, 541 transitions, 7431 flow. Second operand 12 states and 301 transitions. [2024-06-14 14:16:09,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 581 transitions, 9601 flow [2024-06-14 14:16:16,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 581 transitions, 9138 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 14:16:16,264 INFO L231 Difference]: Finished difference. Result has 489 places, 544 transitions, 7384 flow [2024-06-14 14:16:16,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6984, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7384, PETRI_PLACES=489, PETRI_TRANSITIONS=544} [2024-06-14 14:16:16,265 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 444 predicate places. [2024-06-14 14:16:16,265 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 544 transitions, 7384 flow [2024-06-14 14:16:16,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:16,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:16,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:16,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 14:16:16,266 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:16,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:16,266 INFO L85 PathProgramCache]: Analyzing trace with hash 253252244, now seen corresponding path program 12 times [2024-06-14 14:16:16,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:16,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851638705] [2024-06-14 14:16:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:16,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:16,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:16,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:16,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851638705] [2024-06-14 14:16:16,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851638705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:16,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:16,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:16:16,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880466983] [2024-06-14 14:16:16,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:16,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:16:16,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:16,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:16:16,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:16:16,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:16:16,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 544 transitions, 7384 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:16,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:16,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:16:16,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:17,763 INFO L124 PetriNetUnfolderBase]: 2511/4424 cut-off events. [2024-06-14 14:16:17,763 INFO L125 PetriNetUnfolderBase]: For 911754/911754 co-relation queries the response was YES. [2024-06-14 14:16:17,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36976 conditions, 4424 events. 2511/4424 cut-off events. For 911754/911754 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 30347 event pairs, 443 based on Foata normal form. 1/4416 useless extension candidates. Maximal degree in co-relation 36773. Up to 3572 conditions per place. [2024-06-14 14:16:17,839 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 392 selfloop transitions, 180 changer transitions 0/581 dead transitions. [2024-06-14 14:16:17,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 581 transitions, 9210 flow [2024-06-14 14:16:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:16:17,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:16:17,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 317 transitions. [2024-06-14 14:16:17,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541958041958042 [2024-06-14 14:16:17,841 INFO L175 Difference]: Start difference. First operand has 489 places, 544 transitions, 7384 flow. Second operand 13 states and 317 transitions. [2024-06-14 14:16:17,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 581 transitions, 9210 flow [2024-06-14 14:16:24,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 581 transitions, 8816 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-14 14:16:24,959 INFO L231 Difference]: Finished difference. Result has 493 places, 544 transitions, 7356 flow [2024-06-14 14:16:24,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6990, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7356, PETRI_PLACES=493, PETRI_TRANSITIONS=544} [2024-06-14 14:16:24,959 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 448 predicate places. [2024-06-14 14:16:24,960 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 544 transitions, 7356 flow [2024-06-14 14:16:24,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:24,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:24,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:24,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 14:16:24,960 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:24,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:24,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2130142538, now seen corresponding path program 13 times [2024-06-14 14:16:24,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:24,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604443583] [2024-06-14 14:16:24,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:24,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:24,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:25,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:25,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:25,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604443583] [2024-06-14 14:16:25,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604443583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:25,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:25,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:16:25,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140955768] [2024-06-14 14:16:25,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:25,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:16:25,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:25,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:16:25,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:16:25,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:16:25,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 544 transitions, 7356 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:25,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:25,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:16:25,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:26,457 INFO L124 PetriNetUnfolderBase]: 2532/4459 cut-off events. [2024-06-14 14:16:26,457 INFO L125 PetriNetUnfolderBase]: For 945873/945873 co-relation queries the response was YES. [2024-06-14 14:16:26,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37565 conditions, 4459 events. 2532/4459 cut-off events. For 945873/945873 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 30666 event pairs, 443 based on Foata normal form. 1/4451 useless extension candidates. Maximal degree in co-relation 37361. Up to 3596 conditions per place. [2024-06-14 14:16:26,532 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 388 selfloop transitions, 188 changer transitions 0/585 dead transitions. [2024-06-14 14:16:26,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 585 transitions, 9637 flow [2024-06-14 14:16:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:16:26,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:16:26,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 313 transitions. [2024-06-14 14:16:26,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472027972027972 [2024-06-14 14:16:26,534 INFO L175 Difference]: Start difference. First operand has 493 places, 544 transitions, 7356 flow. Second operand 13 states and 313 transitions. [2024-06-14 14:16:26,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 585 transitions, 9637 flow [2024-06-14 14:16:33,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 585 transitions, 9235 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-14 14:16:33,967 INFO L231 Difference]: Finished difference. Result has 493 places, 553 transitions, 7495 flow [2024-06-14 14:16:33,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6972, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7495, PETRI_PLACES=493, PETRI_TRANSITIONS=553} [2024-06-14 14:16:33,967 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 448 predicate places. [2024-06-14 14:16:33,967 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 553 transitions, 7495 flow [2024-06-14 14:16:33,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:33,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:33,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:33,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 14:16:33,968 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:33,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:33,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2143475018, now seen corresponding path program 14 times [2024-06-14 14:16:33,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:33,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820521744] [2024-06-14 14:16:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:33,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:34,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:34,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820521744] [2024-06-14 14:16:34,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820521744] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:34,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:34,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:16:34,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363737336] [2024-06-14 14:16:34,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:34,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:16:34,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:34,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:16:34,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:16:34,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:16:34,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 553 transitions, 7495 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:34,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:34,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:16:34,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:35,464 INFO L124 PetriNetUnfolderBase]: 2529/4455 cut-off events. [2024-06-14 14:16:35,464 INFO L125 PetriNetUnfolderBase]: For 946117/946117 co-relation queries the response was YES. [2024-06-14 14:16:35,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37464 conditions, 4455 events. 2529/4455 cut-off events. For 946117/946117 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 30601 event pairs, 443 based on Foata normal form. 1/4447 useless extension candidates. Maximal degree in co-relation 37260. Up to 3593 conditions per place. [2024-06-14 14:16:35,538 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 386 selfloop transitions, 187 changer transitions 0/582 dead transitions. [2024-06-14 14:16:35,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 582 transitions, 9311 flow [2024-06-14 14:16:35,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:16:35,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:16:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 272 transitions. [2024-06-14 14:16:35,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5619834710743802 [2024-06-14 14:16:35,540 INFO L175 Difference]: Start difference. First operand has 493 places, 553 transitions, 7495 flow. Second operand 11 states and 272 transitions. [2024-06-14 14:16:35,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 582 transitions, 9311 flow [2024-06-14 14:16:42,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 582 transitions, 8965 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 14:16:42,736 INFO L231 Difference]: Finished difference. Result has 497 places, 553 transitions, 7529 flow [2024-06-14 14:16:42,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7149, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7529, PETRI_PLACES=497, PETRI_TRANSITIONS=553} [2024-06-14 14:16:42,737 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 452 predicate places. [2024-06-14 14:16:42,737 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 553 transitions, 7529 flow [2024-06-14 14:16:42,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:42,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:42,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:42,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 14:16:42,738 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:42,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:42,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1077520456, now seen corresponding path program 15 times [2024-06-14 14:16:42,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:42,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332807253] [2024-06-14 14:16:42,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:42,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:43,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:43,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332807253] [2024-06-14 14:16:43,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332807253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:43,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:43,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:16:43,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765913719] [2024-06-14 14:16:43,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:43,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:16:43,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:43,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:16:43,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:16:43,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:16:43,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 553 transitions, 7529 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:43,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:43,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:16:43,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:44,277 INFO L124 PetriNetUnfolderBase]: 2526/4458 cut-off events. [2024-06-14 14:16:44,278 INFO L125 PetriNetUnfolderBase]: For 947029/947029 co-relation queries the response was YES. [2024-06-14 14:16:44,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37362 conditions, 4458 events. 2526/4458 cut-off events. For 947029/947029 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 30631 event pairs, 431 based on Foata normal form. 1/4455 useless extension candidates. Maximal degree in co-relation 37156. Up to 3855 conditions per place. [2024-06-14 14:16:44,358 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 528 selfloop transitions, 31 changer transitions 0/568 dead transitions. [2024-06-14 14:16:44,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 568 transitions, 8683 flow [2024-06-14 14:16:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:16:44,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:16:44,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 14:16:44,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5397727272727273 [2024-06-14 14:16:44,359 INFO L175 Difference]: Start difference. First operand has 497 places, 553 transitions, 7529 flow. Second operand 8 states and 190 transitions. [2024-06-14 14:16:44,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 568 transitions, 8683 flow [2024-06-14 14:16:51,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 568 transitions, 8289 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 14:16:51,631 INFO L231 Difference]: Finished difference. Result has 495 places, 553 transitions, 7203 flow [2024-06-14 14:16:51,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7135, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7203, PETRI_PLACES=495, PETRI_TRANSITIONS=553} [2024-06-14 14:16:51,632 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 450 predicate places. [2024-06-14 14:16:51,632 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 553 transitions, 7203 flow [2024-06-14 14:16:51,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:51,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:16:51,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:16:51,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 14:16:51,633 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:16:51,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:16:51,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1962902602, now seen corresponding path program 24 times [2024-06-14 14:16:51,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:16:51,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356579606] [2024-06-14 14:16:51,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:16:51,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:16:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:16:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:16:52,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:16:52,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356579606] [2024-06-14 14:16:52,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356579606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:16:52,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:16:52,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:16:52,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53167215] [2024-06-14 14:16:52,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:16:52,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:16:52,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:16:52,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:16:52,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:16:52,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:16:52,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 553 transitions, 7203 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:16:52,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:16:52,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:16:52,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:16:53,240 INFO L124 PetriNetUnfolderBase]: 2539/4464 cut-off events. [2024-06-14 14:16:53,240 INFO L125 PetriNetUnfolderBase]: For 969739/969739 co-relation queries the response was YES. [2024-06-14 14:16:53,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37348 conditions, 4464 events. 2539/4464 cut-off events. For 969739/969739 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 30762 event pairs, 464 based on Foata normal form. 1/4452 useless extension candidates. Maximal degree in co-relation 37141. Up to 3526 conditions per place. [2024-06-14 14:16:53,319 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 350 selfloop transitions, 226 changer transitions 0/585 dead transitions. [2024-06-14 14:16:53,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 585 transitions, 9441 flow [2024-06-14 14:16:53,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:16:53,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:16:53,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 307 transitions. [2024-06-14 14:16:53,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5367132867132867 [2024-06-14 14:16:53,320 INFO L175 Difference]: Start difference. First operand has 495 places, 553 transitions, 7203 flow. Second operand 13 states and 307 transitions. [2024-06-14 14:16:53,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 585 transitions, 9441 flow [2024-06-14 14:17:00,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 585 transitions, 9367 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:17:00,253 INFO L231 Difference]: Finished difference. Result has 501 places, 559 transitions, 7701 flow [2024-06-14 14:17:00,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7129, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7701, PETRI_PLACES=501, PETRI_TRANSITIONS=559} [2024-06-14 14:17:00,253 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 456 predicate places. [2024-06-14 14:17:00,254 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 559 transitions, 7701 flow [2024-06-14 14:17:00,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:00,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:00,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:00,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 14:17:00,254 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:00,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:00,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1347565428, now seen corresponding path program 25 times [2024-06-14 14:17:00,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:00,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820073423] [2024-06-14 14:17:00,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:00,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:00,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:00,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:00,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820073423] [2024-06-14 14:17:00,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820073423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:00,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:00,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:17:00,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443790755] [2024-06-14 14:17:00,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:00,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:17:00,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:00,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:17:00,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:17:00,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:17:00,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 559 transitions, 7701 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:00,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:00,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:17:00,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:01,770 INFO L124 PetriNetUnfolderBase]: 2544/4473 cut-off events. [2024-06-14 14:17:01,770 INFO L125 PetriNetUnfolderBase]: For 984324/984324 co-relation queries the response was YES. [2024-06-14 14:17:01,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37959 conditions, 4473 events. 2544/4473 cut-off events. For 984324/984324 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 30835 event pairs, 464 based on Foata normal form. 1/4461 useless extension candidates. Maximal degree in co-relation 37751. Up to 3532 conditions per place. [2024-06-14 14:17:01,849 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 349 selfloop transitions, 229 changer transitions 0/587 dead transitions. [2024-06-14 14:17:01,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 587 transitions, 9899 flow [2024-06-14 14:17:01,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:17:01,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:17:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 289 transitions. [2024-06-14 14:17:01,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5473484848484849 [2024-06-14 14:17:01,851 INFO L175 Difference]: Start difference. First operand has 501 places, 559 transitions, 7701 flow. Second operand 12 states and 289 transitions. [2024-06-14 14:17:01,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 587 transitions, 9899 flow [2024-06-14 14:17:12,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 587 transitions, 9257 flow, removed 31 selfloop flow, removed 11 redundant places. [2024-06-14 14:17:12,322 INFO L231 Difference]: Finished difference. Result has 502 places, 562 transitions, 7589 flow [2024-06-14 14:17:12,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7072, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7589, PETRI_PLACES=502, PETRI_TRANSITIONS=562} [2024-06-14 14:17:12,323 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 457 predicate places. [2024-06-14 14:17:12,323 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 562 transitions, 7589 flow [2024-06-14 14:17:12,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:12,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:12,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:12,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 14:17:12,324 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:12,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:12,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1307788612, now seen corresponding path program 26 times [2024-06-14 14:17:12,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:12,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718875891] [2024-06-14 14:17:12,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:12,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:12,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:12,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718875891] [2024-06-14 14:17:12,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718875891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:12,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:12,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:17:12,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657205279] [2024-06-14 14:17:12,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:12,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:17:12,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:12,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:17:12,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:17:12,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:17:12,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 562 transitions, 7589 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:12,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:12,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:17:12,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:14,020 INFO L124 PetriNetUnfolderBase]: 2541/4469 cut-off events. [2024-06-14 14:17:14,021 INFO L125 PetriNetUnfolderBase]: For 982504/982504 co-relation queries the response was YES. [2024-06-14 14:17:14,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37707 conditions, 4469 events. 2541/4469 cut-off events. For 982504/982504 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 30755 event pairs, 464 based on Foata normal form. 1/4457 useless extension candidates. Maximal degree in co-relation 37498. Up to 3529 conditions per place. [2024-06-14 14:17:14,096 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 348 selfloop transitions, 228 changer transitions 0/585 dead transitions. [2024-06-14 14:17:14,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 585 transitions, 9411 flow [2024-06-14 14:17:14,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:17:14,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:17:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-14 14:17:14,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5495867768595041 [2024-06-14 14:17:14,097 INFO L175 Difference]: Start difference. First operand has 502 places, 562 transitions, 7589 flow. Second operand 11 states and 266 transitions. [2024-06-14 14:17:14,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 585 transitions, 9411 flow [2024-06-14 14:17:21,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 585 transitions, 8649 flow, removed 29 selfloop flow, removed 13 redundant places. [2024-06-14 14:17:21,534 INFO L231 Difference]: Finished difference. Result has 500 places, 562 transitions, 7289 flow [2024-06-14 14:17:21,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6827, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7289, PETRI_PLACES=500, PETRI_TRANSITIONS=562} [2024-06-14 14:17:21,535 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 455 predicate places. [2024-06-14 14:17:21,535 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 562 transitions, 7289 flow [2024-06-14 14:17:21,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:21,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:21,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:21,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 14:17:21,535 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:21,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:21,536 INFO L85 PathProgramCache]: Analyzing trace with hash -986551146, now seen corresponding path program 27 times [2024-06-14 14:17:21,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:21,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783238599] [2024-06-14 14:17:21,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:21,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:21,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:21,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:21,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783238599] [2024-06-14 14:17:21,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783238599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:21,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:21,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:17:21,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170387820] [2024-06-14 14:17:21,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:21,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:17:21,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:21,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:17:21,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:17:21,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:17:21,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 562 transitions, 7289 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:21,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:21,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:17:21,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:23,107 INFO L124 PetriNetUnfolderBase]: 2538/4465 cut-off events. [2024-06-14 14:17:23,107 INFO L125 PetriNetUnfolderBase]: For 979728/979728 co-relation queries the response was YES. [2024-06-14 14:17:23,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37399 conditions, 4465 events. 2538/4465 cut-off events. For 979728/979728 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 30776 event pairs, 464 based on Foata normal form. 1/4453 useless extension candidates. Maximal degree in co-relation 37189. Up to 3526 conditions per place. [2024-06-14 14:17:23,220 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 341 selfloop transitions, 235 changer transitions 0/585 dead transitions. [2024-06-14 14:17:23,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 585 transitions, 8805 flow [2024-06-14 14:17:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:17:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:17:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2024-06-14 14:17:23,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-06-14 14:17:23,222 INFO L175 Difference]: Start difference. First operand has 500 places, 562 transitions, 7289 flow. Second operand 12 states and 282 transitions. [2024-06-14 14:17:23,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 585 transitions, 8805 flow [2024-06-14 14:17:29,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 585 transitions, 8323 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 14:17:29,456 INFO L231 Difference]: Finished difference. Result has 502 places, 562 transitions, 7283 flow [2024-06-14 14:17:29,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6807, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7283, PETRI_PLACES=502, PETRI_TRANSITIONS=562} [2024-06-14 14:17:29,457 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 457 predicate places. [2024-06-14 14:17:29,457 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 562 transitions, 7283 flow [2024-06-14 14:17:29,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:29,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:29,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:29,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 14:17:29,458 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:29,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:29,458 INFO L85 PathProgramCache]: Analyzing trace with hash -403752746, now seen corresponding path program 28 times [2024-06-14 14:17:29,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:29,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688429762] [2024-06-14 14:17:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:29,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:29,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:29,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:29,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688429762] [2024-06-14 14:17:29,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688429762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:29,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:29,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:17:29,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741126154] [2024-06-14 14:17:29,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:29,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:17:29,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:29,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:17:29,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:17:29,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:17:29,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 562 transitions, 7283 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:29,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:29,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:17:29,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:30,937 INFO L124 PetriNetUnfolderBase]: 2535/4461 cut-off events. [2024-06-14 14:17:30,937 INFO L125 PetriNetUnfolderBase]: For 979518/979518 co-relation queries the response was YES. [2024-06-14 14:17:31,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37285 conditions, 4461 events. 2535/4461 cut-off events. For 979518/979518 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 30718 event pairs, 464 based on Foata normal form. 1/4449 useless extension candidates. Maximal degree in co-relation 37074. Up to 3523 conditions per place. [2024-06-14 14:17:31,143 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 346 selfloop transitions, 231 changer transitions 0/586 dead transitions. [2024-06-14 14:17:31,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 586 transitions, 8805 flow [2024-06-14 14:17:31,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:17:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:17:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 304 transitions. [2024-06-14 14:17:31,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5314685314685315 [2024-06-14 14:17:31,144 INFO L175 Difference]: Start difference. First operand has 502 places, 562 transitions, 7283 flow. Second operand 13 states and 304 transitions. [2024-06-14 14:17:31,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 586 transitions, 8805 flow [2024-06-14 14:17:37,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 586 transitions, 8319 flow, removed 22 selfloop flow, removed 10 redundant places. [2024-06-14 14:17:37,933 INFO L231 Difference]: Finished difference. Result has 505 places, 562 transitions, 7265 flow [2024-06-14 14:17:37,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6797, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7265, PETRI_PLACES=505, PETRI_TRANSITIONS=562} [2024-06-14 14:17:37,933 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 460 predicate places. [2024-06-14 14:17:37,933 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 562 transitions, 7265 flow [2024-06-14 14:17:37,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:37,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:37,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:37,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 14:17:37,934 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:37,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:37,934 INFO L85 PathProgramCache]: Analyzing trace with hash -581121416, now seen corresponding path program 29 times [2024-06-14 14:17:37,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:37,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179999072] [2024-06-14 14:17:37,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:37,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:38,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:38,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179999072] [2024-06-14 14:17:38,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179999072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:38,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:38,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:17:38,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250037788] [2024-06-14 14:17:38,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:38,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:17:38,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:38,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:17:38,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:17:38,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:17:38,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 562 transitions, 7265 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:38,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:38,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:17:38,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:39,534 INFO L124 PetriNetUnfolderBase]: 2532/4465 cut-off events. [2024-06-14 14:17:39,534 INFO L125 PetriNetUnfolderBase]: For 978810/978810 co-relation queries the response was YES. [2024-06-14 14:17:39,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37151 conditions, 4465 events. 2532/4465 cut-off events. For 978810/978810 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 30779 event pairs, 443 based on Foata normal form. 1/4458 useless extension candidates. Maximal degree in co-relation 36939. Up to 3841 conditions per place. [2024-06-14 14:17:39,600 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 531 selfloop transitions, 33 changer transitions 0/573 dead transitions. [2024-06-14 14:17:39,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 573 transitions, 8419 flow [2024-06-14 14:17:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:17:39,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:17:39,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 14:17:39,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-14 14:17:39,601 INFO L175 Difference]: Start difference. First operand has 505 places, 562 transitions, 7265 flow. Second operand 7 states and 170 transitions. [2024-06-14 14:17:39,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 573 transitions, 8419 flow [2024-06-14 14:17:46,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 573 transitions, 7909 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-14 14:17:46,743 INFO L231 Difference]: Finished difference. Result has 500 places, 562 transitions, 6831 flow [2024-06-14 14:17:46,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6755, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6831, PETRI_PLACES=500, PETRI_TRANSITIONS=562} [2024-06-14 14:17:46,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 455 predicate places. [2024-06-14 14:17:46,744 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 562 transitions, 6831 flow [2024-06-14 14:17:46,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:46,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:46,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:46,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 14:17:46,745 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:46,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:46,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1347572372, now seen corresponding path program 16 times [2024-06-14 14:17:46,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:46,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964470150] [2024-06-14 14:17:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:46,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:46,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:47,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:47,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964470150] [2024-06-14 14:17:47,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964470150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:47,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:47,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:17:47,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327471475] [2024-06-14 14:17:47,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:47,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:17:47,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:47,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:17:47,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:17:47,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:17:47,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 562 transitions, 6831 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:47,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:47,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:17:47,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:48,396 INFO L124 PetriNetUnfolderBase]: 2537/4472 cut-off events. [2024-06-14 14:17:48,396 INFO L125 PetriNetUnfolderBase]: For 989423/989423 co-relation queries the response was YES. [2024-06-14 14:17:48,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36790 conditions, 4472 events. 2537/4472 cut-off events. For 989423/989423 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 30790 event pairs, 448 based on Foata normal form. 1/4464 useless extension candidates. Maximal degree in co-relation 36577. Up to 3605 conditions per place. [2024-06-14 14:17:48,465 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 392 selfloop transitions, 189 changer transitions 0/590 dead transitions. [2024-06-14 14:17:48,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 590 transitions, 9050 flow [2024-06-14 14:17:48,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:17:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:17:48,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 287 transitions. [2024-06-14 14:17:48,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435606060606061 [2024-06-14 14:17:48,466 INFO L175 Difference]: Start difference. First operand has 500 places, 562 transitions, 6831 flow. Second operand 12 states and 287 transitions. [2024-06-14 14:17:48,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 590 transitions, 9050 flow [2024-06-14 14:17:55,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 590 transitions, 8980 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 14:17:55,699 INFO L231 Difference]: Finished difference. Result has 506 places, 565 transitions, 7202 flow [2024-06-14 14:17:55,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6767, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7202, PETRI_PLACES=506, PETRI_TRANSITIONS=565} [2024-06-14 14:17:55,699 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 461 predicate places. [2024-06-14 14:17:55,699 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 565 transitions, 7202 flow [2024-06-14 14:17:55,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:55,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:17:55,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:17:55,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 14:17:55,700 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:17:55,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:17:55,701 INFO L85 PathProgramCache]: Analyzing trace with hash -380035402, now seen corresponding path program 17 times [2024-06-14 14:17:55,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:17:55,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956899081] [2024-06-14 14:17:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:17:55,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:17:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:17:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:17:56,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:17:56,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956899081] [2024-06-14 14:17:56,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956899081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:17:56,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:17:56,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:17:56,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975724984] [2024-06-14 14:17:56,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:17:56,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:17:56,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:17:56,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:17:56,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:17:56,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:17:56,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 565 transitions, 7202 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:17:56,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:17:56,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:17:56,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:17:57,411 INFO L124 PetriNetUnfolderBase]: 2550/4494 cut-off events. [2024-06-14 14:17:57,412 INFO L125 PetriNetUnfolderBase]: For 1003707/1003707 co-relation queries the response was YES. [2024-06-14 14:17:57,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37453 conditions, 4494 events. 2550/4494 cut-off events. For 1003707/1003707 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 31033 event pairs, 448 based on Foata normal form. 1/4486 useless extension candidates. Maximal degree in co-relation 37240. Up to 3620 conditions per place. [2024-06-14 14:17:57,484 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 390 selfloop transitions, 198 changer transitions 0/597 dead transitions. [2024-06-14 14:17:57,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 597 transitions, 9498 flow [2024-06-14 14:17:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:17:57,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:17:57,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 305 transitions. [2024-06-14 14:17:57,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5332167832167832 [2024-06-14 14:17:57,486 INFO L175 Difference]: Start difference. First operand has 506 places, 565 transitions, 7202 flow. Second operand 13 states and 305 transitions. [2024-06-14 14:17:57,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 597 transitions, 9498 flow [2024-06-14 14:18:04,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 597 transitions, 8934 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-14 14:18:04,289 INFO L231 Difference]: Finished difference. Result has 508 places, 571 transitions, 7152 flow [2024-06-14 14:18:04,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6658, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7152, PETRI_PLACES=508, PETRI_TRANSITIONS=571} [2024-06-14 14:18:04,289 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 463 predicate places. [2024-06-14 14:18:04,289 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 571 transitions, 7152 flow [2024-06-14 14:18:04,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:04,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:04,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:04,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 14:18:04,293 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:04,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:04,293 INFO L85 PathProgramCache]: Analyzing trace with hash -393367882, now seen corresponding path program 18 times [2024-06-14 14:18:04,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:04,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92898909] [2024-06-14 14:18:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:04,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:04,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:04,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92898909] [2024-06-14 14:18:04,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92898909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:04,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:04,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:18:04,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878282556] [2024-06-14 14:18:04,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:04,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:18:04,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:04,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:18:04,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:18:04,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:18:04,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 571 transitions, 7152 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:04,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:04,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:18:04,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:05,918 INFO L124 PetriNetUnfolderBase]: 2547/4490 cut-off events. [2024-06-14 14:18:05,918 INFO L125 PetriNetUnfolderBase]: For 1001758/1001758 co-relation queries the response was YES. [2024-06-14 14:18:05,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37214 conditions, 4490 events. 2547/4490 cut-off events. For 1001758/1001758 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 30940 event pairs, 448 based on Foata normal form. 1/4482 useless extension candidates. Maximal degree in co-relation 37000. Up to 3617 conditions per place. [2024-06-14 14:18:05,992 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 388 selfloop transitions, 197 changer transitions 0/594 dead transitions. [2024-06-14 14:18:05,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 594 transitions, 9012 flow [2024-06-14 14:18:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:18:05,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:18:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 264 transitions. [2024-06-14 14:18:05,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-14 14:18:05,994 INFO L175 Difference]: Start difference. First operand has 508 places, 571 transitions, 7152 flow. Second operand 11 states and 264 transitions. [2024-06-14 14:18:05,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 594 transitions, 9012 flow [2024-06-14 14:18:13,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 594 transitions, 8544 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-14 14:18:13,815 INFO L231 Difference]: Finished difference. Result has 509 places, 571 transitions, 7084 flow [2024-06-14 14:18:13,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6684, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7084, PETRI_PLACES=509, PETRI_TRANSITIONS=571} [2024-06-14 14:18:13,815 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 464 predicate places. [2024-06-14 14:18:13,816 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 571 transitions, 7084 flow [2024-06-14 14:18:13,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:13,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:13,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:13,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 14:18:13,816 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:13,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:13,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1208277686, now seen corresponding path program 19 times [2024-06-14 14:18:13,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:13,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974245670] [2024-06-14 14:18:13,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:13,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:14,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:14,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974245670] [2024-06-14 14:18:14,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974245670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:14,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:14,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:18:14,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649420967] [2024-06-14 14:18:14,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:14,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:18:14,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:14,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:18:14,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:18:14,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:18:14,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 571 transitions, 7084 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:14,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:14,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:18:14,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:15,473 INFO L124 PetriNetUnfolderBase]: 2552/4508 cut-off events. [2024-06-14 14:18:15,473 INFO L125 PetriNetUnfolderBase]: For 1013143/1013143 co-relation queries the response was YES. [2024-06-14 14:18:15,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37279 conditions, 4508 events. 2552/4508 cut-off events. For 1013143/1013143 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 31098 event pairs, 433 based on Foata normal form. 1/4505 useless extension candidates. Maximal degree in co-relation 37064. Up to 3892 conditions per place. [2024-06-14 14:18:15,546 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 546 selfloop transitions, 31 changer transitions 0/586 dead transitions. [2024-06-14 14:18:15,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 586 transitions, 8315 flow [2024-06-14 14:18:15,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:18:15,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:18:15,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 14:18:15,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-14 14:18:15,547 INFO L175 Difference]: Start difference. First operand has 509 places, 571 transitions, 7084 flow. Second operand 8 states and 187 transitions. [2024-06-14 14:18:15,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 586 transitions, 8315 flow [2024-06-14 14:18:23,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 586 transitions, 7915 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-14 14:18:23,175 INFO L231 Difference]: Finished difference. Result has 507 places, 574 transitions, 6807 flow [2024-06-14 14:18:23,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6690, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6807, PETRI_PLACES=507, PETRI_TRANSITIONS=574} [2024-06-14 14:18:23,176 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 462 predicate places. [2024-06-14 14:18:23,176 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 574 transitions, 6807 flow [2024-06-14 14:18:23,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:23,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:23,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:23,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 14:18:23,177 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:23,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:23,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1360904852, now seen corresponding path program 20 times [2024-06-14 14:18:23,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:23,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800972389] [2024-06-14 14:18:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:23,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:23,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:23,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:23,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800972389] [2024-06-14 14:18:23,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800972389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:23,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:23,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:18:23,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224876535] [2024-06-14 14:18:23,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:23,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:18:23,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:23,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:18:23,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:18:23,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:18:23,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 574 transitions, 6807 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:23,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:23,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:18:23,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:24,818 INFO L124 PetriNetUnfolderBase]: 2565/4521 cut-off events. [2024-06-14 14:18:24,818 INFO L125 PetriNetUnfolderBase]: For 1037337/1037337 co-relation queries the response was YES. [2024-06-14 14:18:24,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37264 conditions, 4521 events. 2565/4521 cut-off events. For 1037337/1037337 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 31250 event pairs, 448 based on Foata normal form. 1/4513 useless extension candidates. Maximal degree in co-relation 37048. Up to 3638 conditions per place. [2024-06-14 14:18:24,891 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 391 selfloop transitions, 206 changer transitions 0/606 dead transitions. [2024-06-14 14:18:24,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 606 transitions, 9108 flow [2024-06-14 14:18:24,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:18:24,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:18:24,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 306 transitions. [2024-06-14 14:18:24,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.534965034965035 [2024-06-14 14:18:24,893 INFO L175 Difference]: Start difference. First operand has 507 places, 574 transitions, 6807 flow. Second operand 13 states and 306 transitions. [2024-06-14 14:18:24,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 606 transitions, 9108 flow [2024-06-14 14:18:34,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 606 transitions, 9022 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 14:18:34,906 INFO L231 Difference]: Finished difference. Result has 514 places, 580 transitions, 7220 flow [2024-06-14 14:18:34,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6721, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7220, PETRI_PLACES=514, PETRI_TRANSITIONS=580} [2024-06-14 14:18:34,907 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 469 predicate places. [2024-06-14 14:18:34,907 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 580 transitions, 7220 flow [2024-06-14 14:18:34,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:34,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:34,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:18:34,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 14:18:34,907 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:34,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:34,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1002824340, now seen corresponding path program 21 times [2024-06-14 14:18:34,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:34,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772517185] [2024-06-14 14:18:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:34,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:34,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:35,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:35,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:35,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772517185] [2024-06-14 14:18:35,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772517185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:35,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:35,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:18:35,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825905907] [2024-06-14 14:18:35,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:35,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:18:35,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:35,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:18:35,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:18:35,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:18:35,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 580 transitions, 7220 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:35,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:35,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:18:35,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:36,817 INFO L124 PetriNetUnfolderBase]: 2570/4532 cut-off events. [2024-06-14 14:18:36,817 INFO L125 PetriNetUnfolderBase]: For 1050891/1050891 co-relation queries the response was YES. [2024-06-14 14:18:36,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37772 conditions, 4532 events. 2570/4532 cut-off events. For 1050891/1050891 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 31343 event pairs, 443 based on Foata normal form. 1/4525 useless extension candidates. Maximal degree in co-relation 37555. Up to 3875 conditions per place. [2024-06-14 14:18:36,892 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 543 selfloop transitions, 42 changer transitions 0/594 dead transitions. [2024-06-14 14:18:36,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 594 transitions, 8463 flow [2024-06-14 14:18:36,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:18:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:18:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 14:18:36,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-14 14:18:36,893 INFO L175 Difference]: Start difference. First operand has 514 places, 580 transitions, 7220 flow. Second operand 7 states and 172 transitions. [2024-06-14 14:18:36,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 594 transitions, 8463 flow [2024-06-14 14:18:45,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 594 transitions, 8042 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-14 14:18:45,543 INFO L231 Difference]: Finished difference. Result has 512 places, 583 transitions, 6946 flow [2024-06-14 14:18:45,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6802, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6946, PETRI_PLACES=512, PETRI_TRANSITIONS=583} [2024-06-14 14:18:45,544 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 467 predicate places. [2024-06-14 14:18:45,544 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 583 transitions, 6946 flow [2024-06-14 14:18:45,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:45,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:45,545 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, 1, 1] [2024-06-14 14:18:45,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 14:18:45,545 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:45,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:45,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1007585940, now seen corresponding path program 22 times [2024-06-14 14:18:45,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:45,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108691012] [2024-06-14 14:18:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:45,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:46,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:46,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:46,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108691012] [2024-06-14 14:18:46,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108691012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:46,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:46,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:18:46,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399035174] [2024-06-14 14:18:46,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:46,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:18:46,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:46,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:18:46,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:18:46,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:18:46,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 583 transitions, 6946 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:46,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:46,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:18:46,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:47,373 INFO L124 PetriNetUnfolderBase]: 2575/4539 cut-off events. [2024-06-14 14:18:47,373 INFO L125 PetriNetUnfolderBase]: For 1062310/1062310 co-relation queries the response was YES. [2024-06-14 14:18:47,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37520 conditions, 4539 events. 2575/4539 cut-off events. For 1062310/1062310 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31380 event pairs, 448 based on Foata normal form. 1/4531 useless extension candidates. Maximal degree in co-relation 37302. Up to 3650 conditions per place. [2024-06-14 14:18:47,450 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 388 selfloop transitions, 214 changer transitions 0/611 dead transitions. [2024-06-14 14:18:47,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 611 transitions, 8903 flow [2024-06-14 14:18:47,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:18:47,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:18:47,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 305 transitions. [2024-06-14 14:18:47,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5332167832167832 [2024-06-14 14:18:47,464 INFO L175 Difference]: Start difference. First operand has 512 places, 583 transitions, 6946 flow. Second operand 13 states and 305 transitions. [2024-06-14 14:18:47,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 611 transitions, 8903 flow [2024-06-14 14:18:56,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 611 transitions, 8791 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 14:18:56,668 INFO L231 Difference]: Finished difference. Result has 519 places, 586 transitions, 7315 flow [2024-06-14 14:18:56,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6838, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7315, PETRI_PLACES=519, PETRI_TRANSITIONS=586} [2024-06-14 14:18:56,669 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 474 predicate places. [2024-06-14 14:18:56,669 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 586 transitions, 7315 flow [2024-06-14 14:18:56,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:56,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:18:56,669 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] [2024-06-14 14:18:56,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 14:18:56,669 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:18:56,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:18:56,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1066642068, now seen corresponding path program 23 times [2024-06-14 14:18:56,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:18:56,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287811207] [2024-06-14 14:18:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:18:56,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:18:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:18:57,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:18:57,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:18:57,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287811207] [2024-06-14 14:18:57,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287811207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:18:57,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:18:57,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:18:57,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034257662] [2024-06-14 14:18:57,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:18:57,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:18:57,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:18:57,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:18:57,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:18:57,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:18:57,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 586 transitions, 7315 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:18:57,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:18:57,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:18:57,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:18:58,262 INFO L124 PetriNetUnfolderBase]: 2572/4537 cut-off events. [2024-06-14 14:18:58,262 INFO L125 PetriNetUnfolderBase]: For 1050112/1050112 co-relation queries the response was YES. [2024-06-14 14:18:58,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37700 conditions, 4537 events. 2572/4537 cut-off events. For 1050112/1050112 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31388 event pairs, 443 based on Foata normal form. 1/4530 useless extension candidates. Maximal degree in co-relation 37482. Up to 3859 conditions per place. [2024-06-14 14:18:58,339 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 531 selfloop transitions, 58 changer transitions 0/598 dead transitions. [2024-06-14 14:18:58,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 598 transitions, 8847 flow [2024-06-14 14:18:58,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:18:58,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:18:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 14:18:58,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-14 14:18:58,341 INFO L175 Difference]: Start difference. First operand has 519 places, 586 transitions, 7315 flow. Second operand 7 states and 174 transitions. [2024-06-14 14:18:58,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 598 transitions, 8847 flow [2024-06-14 14:19:06,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 598 transitions, 8446 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-14 14:19:06,707 INFO L231 Difference]: Finished difference. Result has 517 places, 586 transitions, 7040 flow [2024-06-14 14:19:06,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6914, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7040, PETRI_PLACES=517, PETRI_TRANSITIONS=586} [2024-06-14 14:19:06,707 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 472 predicate places. [2024-06-14 14:19:06,708 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 586 transitions, 7040 flow [2024-06-14 14:19:06,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:06,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:06,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:06,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 14:19:06,708 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:06,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:06,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2059141322, now seen corresponding path program 24 times [2024-06-14 14:19:06,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:06,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697689171] [2024-06-14 14:19:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:06,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:06,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:07,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:07,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:07,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697689171] [2024-06-14 14:19:07,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697689171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:07,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:07,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:19:07,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023487464] [2024-06-14 14:19:07,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:07,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:19:07,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:07,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:19:07,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:19:07,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:19:07,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 586 transitions, 7040 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:07,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:07,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:19:07,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:08,302 INFO L124 PetriNetUnfolderBase]: 2569/4540 cut-off events. [2024-06-14 14:19:08,303 INFO L125 PetriNetUnfolderBase]: For 1047760/1047760 co-relation queries the response was YES. [2024-06-14 14:19:08,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37245 conditions, 4540 events. 2569/4540 cut-off events. For 1047760/1047760 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31416 event pairs, 433 based on Foata normal form. 1/4537 useless extension candidates. Maximal degree in co-relation 37026. Up to 3887 conditions per place. [2024-06-14 14:19:08,377 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 537 selfloop transitions, 55 changer transitions 0/601 dead transitions. [2024-06-14 14:19:08,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 601 transitions, 8586 flow [2024-06-14 14:19:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:19:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:19:08,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-14 14:19:08,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-14 14:19:08,378 INFO L175 Difference]: Start difference. First operand has 517 places, 586 transitions, 7040 flow. Second operand 10 states and 230 transitions. [2024-06-14 14:19:08,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 601 transitions, 8586 flow [2024-06-14 14:19:15,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 601 transitions, 8474 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 14:19:15,905 INFO L231 Difference]: Finished difference. Result has 522 places, 586 transitions, 7046 flow [2024-06-14 14:19:15,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6930, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7046, PETRI_PLACES=522, PETRI_TRANSITIONS=586} [2024-06-14 14:19:15,908 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 477 predicate places. [2024-06-14 14:19:15,908 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 586 transitions, 7046 flow [2024-06-14 14:19:15,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:15,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:15,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:15,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 14:19:15,909 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:15,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:15,909 INFO L85 PathProgramCache]: Analyzing trace with hash -1799943532, now seen corresponding path program 25 times [2024-06-14 14:19:15,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:15,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369648249] [2024-06-14 14:19:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:15,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:16,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:16,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:16,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369648249] [2024-06-14 14:19:16,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369648249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:16,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:16,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:19:16,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711652844] [2024-06-14 14:19:16,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:16,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:19:16,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:16,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:19:16,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:19:16,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:19:16,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 586 transitions, 7046 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:16,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:16,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:19:16,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:17,453 INFO L124 PetriNetUnfolderBase]: 2566/4536 cut-off events. [2024-06-14 14:19:17,453 INFO L125 PetriNetUnfolderBase]: For 1034399/1034399 co-relation queries the response was YES. [2024-06-14 14:19:17,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37043 conditions, 4536 events. 2566/4536 cut-off events. For 1034399/1034399 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31446 event pairs, 433 based on Foata normal form. 1/4533 useless extension candidates. Maximal degree in co-relation 36824. Up to 3884 conditions per place. [2024-06-14 14:19:17,537 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 536 selfloop transitions, 54 changer transitions 0/599 dead transitions. [2024-06-14 14:19:17,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 599 transitions, 8584 flow [2024-06-14 14:19:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:19:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:19:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 14:19:17,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5397727272727273 [2024-06-14 14:19:17,538 INFO L175 Difference]: Start difference. First operand has 522 places, 586 transitions, 7046 flow. Second operand 8 states and 190 transitions. [2024-06-14 14:19:17,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 599 transitions, 8584 flow [2024-06-14 14:19:24,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 599 transitions, 8426 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 14:19:24,434 INFO L231 Difference]: Finished difference. Result has 522 places, 586 transitions, 7002 flow [2024-06-14 14:19:24,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6888, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7002, PETRI_PLACES=522, PETRI_TRANSITIONS=586} [2024-06-14 14:19:24,435 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 477 predicate places. [2024-06-14 14:19:24,435 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 586 transitions, 7002 flow [2024-06-14 14:19:24,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:24,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:24,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:24,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 14:19:24,436 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:24,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1416648954, now seen corresponding path program 26 times [2024-06-14 14:19:24,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:24,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781157244] [2024-06-14 14:19:24,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:24,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:24,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:24,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:24,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781157244] [2024-06-14 14:19:24,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781157244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:24,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:24,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:19:24,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306118042] [2024-06-14 14:19:24,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:24,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:19:24,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:24,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:19:24,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:19:24,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:19:24,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 586 transitions, 7002 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:24,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:24,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:19:24,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:26,064 INFO L124 PetriNetUnfolderBase]: 2563/4535 cut-off events. [2024-06-14 14:19:26,064 INFO L125 PetriNetUnfolderBase]: For 1032521/1032521 co-relation queries the response was YES. [2024-06-14 14:19:26,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36879 conditions, 4535 events. 2563/4535 cut-off events. For 1032521/1032521 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31395 event pairs, 429 based on Foata normal form. 1/4534 useless extension candidates. Maximal degree in co-relation 36659. Up to 3926 conditions per place. [2024-06-14 14:19:26,144 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 567 selfloop transitions, 21 changer transitions 0/597 dead transitions. [2024-06-14 14:19:26,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 597 transitions, 8204 flow [2024-06-14 14:19:26,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:19:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:19:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 14:19:26,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-14 14:19:26,146 INFO L175 Difference]: Start difference. First operand has 522 places, 586 transitions, 7002 flow. Second operand 7 states and 165 transitions. [2024-06-14 14:19:26,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 597 transitions, 8204 flow [2024-06-14 14:19:33,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 597 transitions, 7971 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-14 14:19:33,038 INFO L231 Difference]: Finished difference. Result has 520 places, 586 transitions, 6821 flow [2024-06-14 14:19:33,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6769, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=565, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6821, PETRI_PLACES=520, PETRI_TRANSITIONS=586} [2024-06-14 14:19:33,038 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 475 predicate places. [2024-06-14 14:19:33,039 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 586 transitions, 6821 flow [2024-06-14 14:19:33,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:33,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:33,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:33,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 14:19:33,039 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:33,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:33,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1063782132, now seen corresponding path program 3 times [2024-06-14 14:19:33,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:33,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427057509] [2024-06-14 14:19:33,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:33,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:33,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:33,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427057509] [2024-06-14 14:19:33,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427057509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:33,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:33,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 14:19:33,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438823293] [2024-06-14 14:19:33,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:33,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 14:19:33,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:33,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 14:19:33,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 14:19:33,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:19:33,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 586 transitions, 6821 flow. Second operand has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:33,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:33,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:19:33,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:34,592 INFO L124 PetriNetUnfolderBase]: 2550/4502 cut-off events. [2024-06-14 14:19:34,592 INFO L125 PetriNetUnfolderBase]: For 1027032/1027032 co-relation queries the response was YES. [2024-06-14 14:19:34,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35253 conditions, 4502 events. 2550/4502 cut-off events. For 1027032/1027032 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 31130 event pairs, 428 based on Foata normal form. 6/4500 useless extension candidates. Maximal degree in co-relation 35033. Up to 3739 conditions per place. [2024-06-14 14:19:34,688 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 557 selfloop transitions, 39 changer transitions 0/605 dead transitions. [2024-06-14 14:19:34,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 605 transitions, 8147 flow [2024-06-14 14:19:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:19:34,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:19:34,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 14:19:34,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2024-06-14 14:19:34,705 INFO L175 Difference]: Start difference. First operand has 520 places, 586 transitions, 6821 flow. Second operand 7 states and 175 transitions. [2024-06-14 14:19:34,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 605 transitions, 8147 flow [2024-06-14 14:19:42,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 605 transitions, 8093 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:19:42,581 INFO L231 Difference]: Finished difference. Result has 520 places, 586 transitions, 6849 flow [2024-06-14 14:19:42,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6767, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6849, PETRI_PLACES=520, PETRI_TRANSITIONS=586} [2024-06-14 14:19:42,582 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 475 predicate places. [2024-06-14 14:19:42,582 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 586 transitions, 6849 flow [2024-06-14 14:19:42,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:42,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:42,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:42,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 14:19:42,582 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:42,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:42,583 INFO L85 PathProgramCache]: Analyzing trace with hash -37199276, now seen corresponding path program 5 times [2024-06-14 14:19:42,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:42,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015303925] [2024-06-14 14:19:42,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:42,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:42,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:42,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:42,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015303925] [2024-06-14 14:19:42,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015303925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:42,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:42,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:19:42,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896299454] [2024-06-14 14:19:42,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:42,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:19:42,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:43,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:19:43,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:19:43,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:19:43,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 586 transitions, 6849 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:43,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:43,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:19:43,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:44,205 INFO L124 PetriNetUnfolderBase]: 2571/4537 cut-off events. [2024-06-14 14:19:44,205 INFO L125 PetriNetUnfolderBase]: For 1002597/1002597 co-relation queries the response was YES. [2024-06-14 14:19:44,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36043 conditions, 4537 events. 2571/4537 cut-off events. For 1002597/1002597 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 31336 event pairs, 423 based on Foata normal form. 2/4534 useless extension candidates. Maximal degree in co-relation 35823. Up to 3840 conditions per place. [2024-06-14 14:19:44,285 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 575 selfloop transitions, 34 changer transitions 0/618 dead transitions. [2024-06-14 14:19:44,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 618 transitions, 8607 flow [2024-06-14 14:19:44,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:19:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:19:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2024-06-14 14:19:44,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5580808080808081 [2024-06-14 14:19:44,287 INFO L175 Difference]: Start difference. First operand has 520 places, 586 transitions, 6849 flow. Second operand 9 states and 221 transitions. [2024-06-14 14:19:44,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 618 transitions, 8607 flow [2024-06-14 14:19:51,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 618 transitions, 8493 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 14:19:51,918 INFO L231 Difference]: Finished difference. Result has 523 places, 590 transitions, 6952 flow [2024-06-14 14:19:51,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6735, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6952, PETRI_PLACES=523, PETRI_TRANSITIONS=590} [2024-06-14 14:19:51,919 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 478 predicate places. [2024-06-14 14:19:51,919 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 590 transitions, 6952 flow [2024-06-14 14:19:51,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:51,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:19:51,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:19:51,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 14:19:51,920 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:19:51,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:19:51,920 INFO L85 PathProgramCache]: Analyzing trace with hash -34342316, now seen corresponding path program 6 times [2024-06-14 14:19:51,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:19:51,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458975652] [2024-06-14 14:19:51,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:19:51,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:19:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:19:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:19:52,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:19:52,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458975652] [2024-06-14 14:19:52,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458975652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:19:52,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:19:52,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:19:52,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283996218] [2024-06-14 14:19:52,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:19:52,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:19:52,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:19:52,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:19:52,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:19:52,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:19:52,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 590 transitions, 6952 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:19:52,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:19:52,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:19:52,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:19:53,580 INFO L124 PetriNetUnfolderBase]: 2566/4535 cut-off events. [2024-06-14 14:19:53,580 INFO L125 PetriNetUnfolderBase]: For 986641/986641 co-relation queries the response was YES. [2024-06-14 14:19:53,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35674 conditions, 4535 events. 2566/4535 cut-off events. For 986641/986641 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 31471 event pairs, 429 based on Foata normal form. 2/4532 useless extension candidates. Maximal degree in co-relation 35453. Up to 3862 conditions per place. [2024-06-14 14:19:53,659 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 573 selfloop transitions, 30 changer transitions 0/612 dead transitions. [2024-06-14 14:19:53,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 612 transitions, 8212 flow [2024-06-14 14:19:53,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:19:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:19:53,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 14:19:53,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 14:19:53,661 INFO L175 Difference]: Start difference. First operand has 523 places, 590 transitions, 6952 flow. Second operand 8 states and 196 transitions. [2024-06-14 14:19:53,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 612 transitions, 8212 flow [2024-06-14 14:20:02,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 612 transitions, 8025 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-14 14:20:02,133 INFO L231 Difference]: Finished difference. Result has 525 places, 590 transitions, 6830 flow [2024-06-14 14:20:02,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6765, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6830, PETRI_PLACES=525, PETRI_TRANSITIONS=590} [2024-06-14 14:20:02,133 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 480 predicate places. [2024-06-14 14:20:02,133 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 590 transitions, 6830 flow [2024-06-14 14:20:02,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:02,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:20:02,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:20:02,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 14:20:02,134 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:20:02,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:20:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash -34337356, now seen corresponding path program 7 times [2024-06-14 14:20:02,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:20:02,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309417374] [2024-06-14 14:20:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:20:02,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:20:02,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:20:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:20:02,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:20:02,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309417374] [2024-06-14 14:20:02,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309417374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:20:02,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:20:02,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:20:02,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401972703] [2024-06-14 14:20:02,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:20:02,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:20:02,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:20:02,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:20:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:20:02,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:20:02,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 590 transitions, 6830 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:02,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:20:02,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:20:02,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:20:03,693 INFO L124 PetriNetUnfolderBase]: 2571/4544 cut-off events. [2024-06-14 14:20:03,694 INFO L125 PetriNetUnfolderBase]: For 981100/981100 co-relation queries the response was YES. [2024-06-14 14:20:03,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35519 conditions, 4544 events. 2571/4544 cut-off events. For 981100/981100 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 31495 event pairs, 429 based on Foata normal form. 1/4540 useless extension candidates. Maximal degree in co-relation 35297. Up to 3872 conditions per place. [2024-06-14 14:20:03,772 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 574 selfloop transitions, 31 changer transitions 0/614 dead transitions. [2024-06-14 14:20:03,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 614 transitions, 8150 flow [2024-06-14 14:20:03,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:20:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:20:03,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 14:20:03,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 14:20:03,773 INFO L175 Difference]: Start difference. First operand has 525 places, 590 transitions, 6830 flow. Second operand 8 states and 196 transitions. [2024-06-14 14:20:03,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 614 transitions, 8150 flow [2024-06-14 14:20:11,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 614 transitions, 8085 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 14:20:11,940 INFO L231 Difference]: Finished difference. Result has 526 places, 593 transitions, 6897 flow [2024-06-14 14:20:11,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6765, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6897, PETRI_PLACES=526, PETRI_TRANSITIONS=593} [2024-06-14 14:20:11,941 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 481 predicate places. [2024-06-14 14:20:11,941 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 593 transitions, 6897 flow [2024-06-14 14:20:11,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:11,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:20:11,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:20:11,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 14:20:11,942 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:20:11,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:20:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash 246587988, now seen corresponding path program 7 times [2024-06-14 14:20:11,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:20:11,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863348446] [2024-06-14 14:20:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:20:11,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:20:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:20:12,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:20:12,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:20:12,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863348446] [2024-06-14 14:20:12,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863348446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:20:12,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:20:12,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:20:12,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999046472] [2024-06-14 14:20:12,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:20:12,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:20:12,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:20:12,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:20:12,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:20:12,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:20:12,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 593 transitions, 6897 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:12,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:20:12,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:20:12,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:20:13,436 INFO L124 PetriNetUnfolderBase]: 2579/4558 cut-off events. [2024-06-14 14:20:13,436 INFO L125 PetriNetUnfolderBase]: For 1007892/1007892 co-relation queries the response was YES. [2024-06-14 14:20:13,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35752 conditions, 4558 events. 2579/4558 cut-off events. For 1007892/1007892 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 31626 event pairs, 434 based on Foata normal form. 2/4553 useless extension candidates. Maximal degree in co-relation 35529. Up to 3806 conditions per place. [2024-06-14 14:20:13,522 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 515 selfloop transitions, 90 changer transitions 0/614 dead transitions. [2024-06-14 14:20:13,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 614 transitions, 8225 flow [2024-06-14 14:20:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:20:13,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:20:13,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 14:20:13,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-14 14:20:13,523 INFO L175 Difference]: Start difference. First operand has 526 places, 593 transitions, 6897 flow. Second operand 8 states and 197 transitions. [2024-06-14 14:20:13,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 614 transitions, 8225 flow [2024-06-14 14:20:21,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 614 transitions, 8127 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 14:20:21,822 INFO L231 Difference]: Finished difference. Result has 528 places, 595 transitions, 7060 flow [2024-06-14 14:20:21,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6799, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7060, PETRI_PLACES=528, PETRI_TRANSITIONS=595} [2024-06-14 14:20:21,823 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 483 predicate places. [2024-06-14 14:20:21,823 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 595 transitions, 7060 flow [2024-06-14 14:20:21,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:21,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:20:21,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:20:21,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 14:20:21,824 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:20:21,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:20:21,824 INFO L85 PathProgramCache]: Analyzing trace with hash 246592948, now seen corresponding path program 8 times [2024-06-14 14:20:21,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:20:21,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184827201] [2024-06-14 14:20:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:20:21,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:20:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:20:22,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:20:22,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:20:22,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184827201] [2024-06-14 14:20:22,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184827201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:20:22,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:20:22,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:20:22,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679134103] [2024-06-14 14:20:22,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:20:22,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:20:22,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:20:22,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:20:22,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:20:22,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:20:22,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 595 transitions, 7060 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:22,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:20:22,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:20:22,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:20:23,364 INFO L124 PetriNetUnfolderBase]: 2592/4578 cut-off events. [2024-06-14 14:20:23,364 INFO L125 PetriNetUnfolderBase]: For 1020245/1020245 co-relation queries the response was YES. [2024-06-14 14:20:23,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36340 conditions, 4578 events. 2592/4578 cut-off events. For 1020245/1020245 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 31786 event pairs, 438 based on Foata normal form. 1/4570 useless extension candidates. Maximal degree in co-relation 36116. Up to 3688 conditions per place. [2024-06-14 14:20:23,441 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 464 selfloop transitions, 150 changer transitions 0/623 dead transitions. [2024-06-14 14:20:23,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 623 transitions, 9828 flow [2024-06-14 14:20:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:20:23,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:20:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 14:20:23,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5852272727272727 [2024-06-14 14:20:23,442 INFO L175 Difference]: Start difference. First operand has 528 places, 595 transitions, 7060 flow. Second operand 8 states and 206 transitions. [2024-06-14 14:20:23,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 623 transitions, 9828 flow [2024-06-14 14:20:32,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 623 transitions, 9583 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 14:20:32,094 INFO L231 Difference]: Finished difference. Result has 530 places, 601 transitions, 7249 flow [2024-06-14 14:20:32,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6815, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7249, PETRI_PLACES=530, PETRI_TRANSITIONS=601} [2024-06-14 14:20:32,095 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 485 predicate places. [2024-06-14 14:20:32,095 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 601 transitions, 7249 flow [2024-06-14 14:20:32,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:32,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:20:32,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:20:32,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 14:20:32,096 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:20:32,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:20:32,096 INFO L85 PathProgramCache]: Analyzing trace with hash 253259188, now seen corresponding path program 9 times [2024-06-14 14:20:32,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:20:32,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703372605] [2024-06-14 14:20:32,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:20:32,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:20:32,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:20:32,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:20:32,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:20:32,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703372605] [2024-06-14 14:20:32,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703372605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:20:32,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:20:32,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:20:32,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571225612] [2024-06-14 14:20:32,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:20:32,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:20:32,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:20:32,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:20:32,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:20:32,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:20:32,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 601 transitions, 7249 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:32,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:20:32,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:20:32,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:20:33,513 INFO L124 PetriNetUnfolderBase]: 2589/4574 cut-off events. [2024-06-14 14:20:33,513 INFO L125 PetriNetUnfolderBase]: For 1016677/1016677 co-relation queries the response was YES. [2024-06-14 14:20:33,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36200 conditions, 4574 events. 2589/4574 cut-off events. For 1016677/1016677 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 31752 event pairs, 438 based on Foata normal form. 1/4566 useless extension candidates. Maximal degree in co-relation 35975. Up to 3685 conditions per place. [2024-06-14 14:20:33,594 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 461 selfloop transitions, 152 changer transitions 0/622 dead transitions. [2024-06-14 14:20:33,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 622 transitions, 9551 flow [2024-06-14 14:20:33,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:20:33,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:20:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-14 14:20:33,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5795454545454546 [2024-06-14 14:20:33,595 INFO L175 Difference]: Start difference. First operand has 530 places, 601 transitions, 7249 flow. Second operand 8 states and 204 transitions. [2024-06-14 14:20:33,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 622 transitions, 9551 flow [2024-06-14 14:20:41,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 622 transitions, 9089 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 14:20:41,547 INFO L231 Difference]: Finished difference. Result has 532 places, 601 transitions, 7097 flow [2024-06-14 14:20:41,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6787, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7097, PETRI_PLACES=532, PETRI_TRANSITIONS=601} [2024-06-14 14:20:41,547 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 487 predicate places. [2024-06-14 14:20:41,547 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 601 transitions, 7097 flow [2024-06-14 14:20:41,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:41,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:20:41,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:20:41,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 14:20:41,548 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:20:41,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:20:41,548 INFO L85 PathProgramCache]: Analyzing trace with hash 253268116, now seen corresponding path program 5 times [2024-06-14 14:20:41,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:20:41,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227879790] [2024-06-14 14:20:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:20:41,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:20:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:20:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:20:41,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:20:41,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227879790] [2024-06-14 14:20:41,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227879790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:20:41,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:20:41,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:20:41,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520090768] [2024-06-14 14:20:41,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:20:41,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:20:41,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:20:41,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:20:41,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:20:41,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:20:41,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 601 transitions, 7097 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:41,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:20:41,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:20:41,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:20:43,034 INFO L124 PetriNetUnfolderBase]: 2584/4567 cut-off events. [2024-06-14 14:20:43,034 INFO L125 PetriNetUnfolderBase]: For 1011612/1011612 co-relation queries the response was YES. [2024-06-14 14:20:43,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35766 conditions, 4567 events. 2584/4567 cut-off events. For 1011612/1011612 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 31665 event pairs, 437 based on Foata normal form. 2/4560 useless extension candidates. Maximal degree in co-relation 35541. Up to 3837 conditions per place. [2024-06-14 14:20:43,115 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 521 selfloop transitions, 91 changer transitions 0/621 dead transitions. [2024-06-14 14:20:43,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 621 transitions, 8392 flow [2024-06-14 14:20:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:20:43,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:20:43,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 14:20:43,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5596590909090909 [2024-06-14 14:20:43,117 INFO L175 Difference]: Start difference. First operand has 532 places, 601 transitions, 7097 flow. Second operand 8 states and 197 transitions. [2024-06-14 14:20:43,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 621 transitions, 8392 flow [2024-06-14 14:20:51,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 621 transitions, 8040 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 14:20:51,052 INFO L231 Difference]: Finished difference. Result has 533 places, 602 transitions, 6959 flow [2024-06-14 14:20:51,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6959, PETRI_PLACES=533, PETRI_TRANSITIONS=602} [2024-06-14 14:20:51,053 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 488 predicate places. [2024-06-14 14:20:51,053 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 602 transitions, 6959 flow [2024-06-14 14:20:51,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:51,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:20:51,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:20:51,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 14:20:51,054 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:20:51,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:20:51,054 INFO L85 PathProgramCache]: Analyzing trace with hash -274257324, now seen corresponding path program 8 times [2024-06-14 14:20:51,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:20:51,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865651597] [2024-06-14 14:20:51,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:20:51,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:20:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:20:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:20:51,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:20:51,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865651597] [2024-06-14 14:20:51,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865651597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:20:51,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:20:51,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:20:51,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240638332] [2024-06-14 14:20:51,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:20:51,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:20:51,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:20:51,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:20:51,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:20:51,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:20:51,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 602 transitions, 6959 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:20:51,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:20:51,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:20:51,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:20:52,741 INFO L124 PetriNetUnfolderBase]: 2605/4601 cut-off events. [2024-06-14 14:20:52,742 INFO L125 PetriNetUnfolderBase]: For 1053983/1053983 co-relation queries the response was YES. [2024-06-14 14:20:52,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36409 conditions, 4601 events. 2605/4601 cut-off events. For 1053983/1053983 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 31983 event pairs, 426 based on Foata normal form. 2/4598 useless extension candidates. Maximal degree in co-relation 36184. Up to 3876 conditions per place. [2024-06-14 14:20:52,856 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 579 selfloop transitions, 47 changer transitions 0/635 dead transitions. [2024-06-14 14:20:52,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 635 transitions, 8779 flow [2024-06-14 14:20:52,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:20:52,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:20:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-14 14:20:52,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477272727272727 [2024-06-14 14:20:52,857 INFO L175 Difference]: Start difference. First operand has 533 places, 602 transitions, 6959 flow. Second operand 10 states and 241 transitions. [2024-06-14 14:20:52,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 635 transitions, 8779 flow [2024-06-14 14:21:01,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 635 transitions, 8588 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 14:21:02,006 INFO L231 Difference]: Finished difference. Result has 537 places, 606 transitions, 7023 flow [2024-06-14 14:21:02,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6768, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7023, PETRI_PLACES=537, PETRI_TRANSITIONS=606} [2024-06-14 14:21:02,007 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 492 predicate places. [2024-06-14 14:21:02,007 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 606 transitions, 7023 flow [2024-06-14 14:21:02,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:02,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:02,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:02,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 14:21:02,008 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:21:02,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:02,008 INFO L85 PathProgramCache]: Analyzing trace with hash -31382888, now seen corresponding path program 9 times [2024-06-14 14:21:02,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:02,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195368601] [2024-06-14 14:21:02,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:02,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:02,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:02,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195368601] [2024-06-14 14:21:02,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195368601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:02,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:02,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:21:02,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217333561] [2024-06-14 14:21:02,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:02,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:21:02,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:02,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:21:02,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:21:02,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:21:02,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 606 transitions, 7023 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:02,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:02,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:21:02,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:03,627 INFO L124 PetriNetUnfolderBase]: 2613/4618 cut-off events. [2024-06-14 14:21:03,627 INFO L125 PetriNetUnfolderBase]: For 1068463/1068463 co-relation queries the response was YES. [2024-06-14 14:21:03,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36688 conditions, 4618 events. 2613/4618 cut-off events. For 1068463/1068463 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 32108 event pairs, 433 based on Foata normal form. 2/4615 useless extension candidates. Maximal degree in co-relation 36462. Up to 3919 conditions per place. [2024-06-14 14:21:03,715 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 580 selfloop transitions, 43 changer transitions 0/632 dead transitions. [2024-06-14 14:21:03,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 632 transitions, 8407 flow [2024-06-14 14:21:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:21:03,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:21:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-14 14:21:03,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5363636363636364 [2024-06-14 14:21:03,716 INFO L175 Difference]: Start difference. First operand has 537 places, 606 transitions, 7023 flow. Second operand 10 states and 236 transitions. [2024-06-14 14:21:03,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 632 transitions, 8407 flow [2024-06-14 14:21:13,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 632 transitions, 8207 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-14 14:21:13,063 INFO L231 Difference]: Finished difference. Result has 541 places, 608 transitions, 6998 flow [2024-06-14 14:21:13,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6861, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6998, PETRI_PLACES=541, PETRI_TRANSITIONS=608} [2024-06-14 14:21:13,064 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 496 predicate places. [2024-06-14 14:21:13,064 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 608 transitions, 6998 flow [2024-06-14 14:21:13,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:13,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:13,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:13,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 14:21:13,064 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:21:13,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:13,065 INFO L85 PathProgramCache]: Analyzing trace with hash -31377928, now seen corresponding path program 10 times [2024-06-14 14:21:13,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:13,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901720219] [2024-06-14 14:21:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:13,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:13,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:13,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901720219] [2024-06-14 14:21:13,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901720219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:13,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:13,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:21:13,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370630353] [2024-06-14 14:21:13,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:13,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:21:13,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:13,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:21:13,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:21:13,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:21:13,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 608 transitions, 6998 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:13,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:13,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:21:13,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:14,668 INFO L124 PetriNetUnfolderBase]: 2618/4627 cut-off events. [2024-06-14 14:21:14,668 INFO L125 PetriNetUnfolderBase]: For 1061901/1061901 co-relation queries the response was YES. [2024-06-14 14:21:14,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36622 conditions, 4627 events. 2618/4627 cut-off events. For 1061901/1061901 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 32192 event pairs, 433 based on Foata normal form. 1/4623 useless extension candidates. Maximal degree in co-relation 36394. Up to 3914 conditions per place. [2024-06-14 14:21:14,750 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 574 selfloop transitions, 52 changer transitions 0/635 dead transitions. [2024-06-14 14:21:14,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 635 transitions, 8730 flow [2024-06-14 14:21:14,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:21:14,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:21:14,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-14 14:21:14,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5431818181818182 [2024-06-14 14:21:14,751 INFO L175 Difference]: Start difference. First operand has 541 places, 608 transitions, 6998 flow. Second operand 10 states and 239 transitions. [2024-06-14 14:21:14,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 635 transitions, 8730 flow [2024-06-14 14:21:23,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 635 transitions, 8581 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-14 14:21:23,905 INFO L231 Difference]: Finished difference. Result has 544 places, 611 transitions, 7044 flow [2024-06-14 14:21:23,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6849, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7044, PETRI_PLACES=544, PETRI_TRANSITIONS=611} [2024-06-14 14:21:23,906 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 499 predicate places. [2024-06-14 14:21:23,906 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 611 transitions, 7044 flow [2024-06-14 14:21:23,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:23,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:23,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:23,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 14:21:23,907 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:21:23,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:23,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1215669814, now seen corresponding path program 10 times [2024-06-14 14:21:23,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:23,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901740514] [2024-06-14 14:21:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:23,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:23,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:24,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:24,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901740514] [2024-06-14 14:21:24,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901740514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:24,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:24,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:21:24,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324472828] [2024-06-14 14:21:24,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:24,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:21:24,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:24,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:21:24,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:21:24,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:21:24,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 611 transitions, 7044 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:24,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:24,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:21:24,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:25,627 INFO L124 PetriNetUnfolderBase]: 2639/4662 cut-off events. [2024-06-14 14:21:25,627 INFO L125 PetriNetUnfolderBase]: For 1121993/1121993 co-relation queries the response was YES. [2024-06-14 14:21:25,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37435 conditions, 4662 events. 2639/4662 cut-off events. For 1121993/1121993 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 32467 event pairs, 345 based on Foata normal form. 2/4659 useless extension candidates. Maximal degree in co-relation 37205. Up to 3780 conditions per place. [2024-06-14 14:21:25,727 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 573 selfloop transitions, 66 changer transitions 0/648 dead transitions. [2024-06-14 14:21:25,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 648 transitions, 9322 flow [2024-06-14 14:21:25,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:21:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:21:25,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-14 14:21:25,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-06-14 14:21:25,728 INFO L175 Difference]: Start difference. First operand has 544 places, 611 transitions, 7044 flow. Second operand 9 states and 224 transitions. [2024-06-14 14:21:25,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 648 transitions, 9322 flow [2024-06-14 14:21:35,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 648 transitions, 9167 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-14 14:21:35,778 INFO L231 Difference]: Finished difference. Result has 545 places, 618 transitions, 7288 flow [2024-06-14 14:21:35,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6889, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7288, PETRI_PLACES=545, PETRI_TRANSITIONS=618} [2024-06-14 14:21:35,779 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 500 predicate places. [2024-06-14 14:21:35,779 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 618 transitions, 7288 flow [2024-06-14 14:21:35,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:35,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:35,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:35,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-14 14:21:35,780 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:21:35,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:35,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1216115284, now seen corresponding path program 11 times [2024-06-14 14:21:35,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:35,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202225882] [2024-06-14 14:21:35,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:35,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:36,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:36,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202225882] [2024-06-14 14:21:36,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202225882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:36,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:36,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:21:36,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874276001] [2024-06-14 14:21:36,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:36,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:21:36,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:36,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:21:36,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:21:36,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:21:36,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 618 transitions, 7288 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:36,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:36,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:21:36,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:37,420 INFO L124 PetriNetUnfolderBase]: 2647/4678 cut-off events. [2024-06-14 14:21:37,421 INFO L125 PetriNetUnfolderBase]: For 1136776/1136776 co-relation queries the response was YES. [2024-06-14 14:21:37,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38005 conditions, 4678 events. 2647/4678 cut-off events. For 1136776/1136776 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 32640 event pairs, 345 based on Foata normal form. 2/4675 useless extension candidates. Maximal degree in co-relation 37773. Up to 3788 conditions per place. [2024-06-14 14:21:37,517 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 567 selfloop transitions, 71 changer transitions 0/647 dead transitions. [2024-06-14 14:21:37,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 553 places, 647 transitions, 9103 flow [2024-06-14 14:21:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:21:37,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:21:37,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-14 14:21:37,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-14 14:21:37,518 INFO L175 Difference]: Start difference. First operand has 545 places, 618 transitions, 7288 flow. Second operand 9 states and 220 transitions. [2024-06-14 14:21:37,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 553 places, 647 transitions, 9103 flow [2024-06-14 14:21:46,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 647 transitions, 8847 flow, removed 104 selfloop flow, removed 4 redundant places. [2024-06-14 14:21:46,914 INFO L231 Difference]: Finished difference. Result has 550 places, 621 transitions, 7302 flow [2024-06-14 14:21:46,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7090, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7302, PETRI_PLACES=550, PETRI_TRANSITIONS=621} [2024-06-14 14:21:46,915 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 505 predicate places. [2024-06-14 14:21:46,915 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 621 transitions, 7302 flow [2024-06-14 14:21:46,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:46,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:46,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:21:46,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-14 14:21:46,917 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:21:46,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:46,917 INFO L85 PathProgramCache]: Analyzing trace with hash -343788972, now seen corresponding path program 12 times [2024-06-14 14:21:46,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:46,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737751187] [2024-06-14 14:21:46,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:46,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:47,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:47,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:47,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737751187] [2024-06-14 14:21:47,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737751187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:47,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:47,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:21:47,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558434187] [2024-06-14 14:21:47,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:47,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:21:47,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:47,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:21:47,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:21:47,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:21:47,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 621 transitions, 7302 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:47,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:47,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:21:47,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:48,492 INFO L124 PetriNetUnfolderBase]: 2642/4671 cut-off events. [2024-06-14 14:21:48,492 INFO L125 PetriNetUnfolderBase]: For 1110762/1110762 co-relation queries the response was YES. [2024-06-14 14:21:48,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37296 conditions, 4671 events. 2642/4671 cut-off events. For 1110762/1110762 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 32590 event pairs, 437 based on Foata normal form. 2/4668 useless extension candidates. Maximal degree in co-relation 37062. Up to 3962 conditions per place. [2024-06-14 14:21:48,608 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 589 selfloop transitions, 42 changer transitions 0/640 dead transitions. [2024-06-14 14:21:48,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 640 transitions, 8610 flow [2024-06-14 14:21:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:21:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:21:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 14:21:48,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5482954545454546 [2024-06-14 14:21:48,610 INFO L175 Difference]: Start difference. First operand has 550 places, 621 transitions, 7302 flow. Second operand 8 states and 193 transitions. [2024-06-14 14:21:48,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 640 transitions, 8610 flow [2024-06-14 14:21:57,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 640 transitions, 8415 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 14:21:57,751 INFO L231 Difference]: Finished difference. Result has 553 places, 621 transitions, 7196 flow [2024-06-14 14:21:57,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7107, PETRI_DIFFERENCE_MINUEND_PLACES=545, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7196, PETRI_PLACES=553, PETRI_TRANSITIONS=621} [2024-06-14 14:21:57,752 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 508 predicate places. [2024-06-14 14:21:57,752 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 621 transitions, 7196 flow [2024-06-14 14:21:57,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:57,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:21:57,753 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, 1, 1] [2024-06-14 14:21:57,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-14 14:21:57,754 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:21:57,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:21:57,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1274207734, now seen corresponding path program 13 times [2024-06-14 14:21:57,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:21:57,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202116513] [2024-06-14 14:21:57,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:21:57,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:21:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:21:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:21:58,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:21:58,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202116513] [2024-06-14 14:21:58,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202116513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:21:58,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:21:58,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:21:58,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088305978] [2024-06-14 14:21:58,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:21:58,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:21:58,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:21:58,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:21:58,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:21:58,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:21:58,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 621 transitions, 7196 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:21:58,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:21:58,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:21:58,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:21:59,256 INFO L124 PetriNetUnfolderBase]: 2637/4662 cut-off events. [2024-06-14 14:21:59,256 INFO L125 PetriNetUnfolderBase]: For 1090501/1090501 co-relation queries the response was YES. [2024-06-14 14:21:59,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36667 conditions, 4662 events. 2637/4662 cut-off events. For 1090501/1090501 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 32521 event pairs, 432 based on Foata normal form. 2/4657 useless extension candidates. Maximal degree in co-relation 36432. Up to 3923 conditions per place. [2024-06-14 14:21:59,346 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 581 selfloop transitions, 51 changer transitions 0/641 dead transitions. [2024-06-14 14:21:59,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 641 transitions, 8508 flow [2024-06-14 14:21:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:21:59,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:21:59,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 14:21:59,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-14 14:21:59,347 INFO L175 Difference]: Start difference. First operand has 553 places, 621 transitions, 7196 flow. Second operand 8 states and 194 transitions. [2024-06-14 14:21:59,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 641 transitions, 8508 flow [2024-06-14 14:22:08,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 641 transitions, 8380 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 14:22:08,422 INFO L231 Difference]: Finished difference. Result has 554 places, 621 transitions, 7175 flow [2024-06-14 14:22:08,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7068, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7175, PETRI_PLACES=554, PETRI_TRANSITIONS=621} [2024-06-14 14:22:08,423 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 509 predicate places. [2024-06-14 14:22:08,423 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 621 transitions, 7175 flow [2024-06-14 14:22:08,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:22:08,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:22:08,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:22:08,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-14 14:22:08,424 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:22:08,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:22:08,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1586318640, now seen corresponding path program 11 times [2024-06-14 14:22:08,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:22:08,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692298443] [2024-06-14 14:22:08,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:22:08,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:22:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:22:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:22:08,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:22:08,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692298443] [2024-06-14 14:22:08,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692298443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:22:08,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:22:08,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:22:08,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328860599] [2024-06-14 14:22:08,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:22:08,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:22:08,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:22:08,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:22:08,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:22:08,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:22:08,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 621 transitions, 7175 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:22:08,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:22:08,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:22:08,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:22:09,905 INFO L124 PetriNetUnfolderBase]: 2642/4673 cut-off events. [2024-06-14 14:22:09,905 INFO L125 PetriNetUnfolderBase]: For 1085833/1085833 co-relation queries the response was YES. [2024-06-14 14:22:09,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36763 conditions, 4673 events. 2642/4673 cut-off events. For 1085833/1085833 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 32646 event pairs, 436 based on Foata normal form. 1/4669 useless extension candidates. Maximal degree in co-relation 36527. Up to 3949 conditions per place. [2024-06-14 14:22:09,988 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 580 selfloop transitions, 54 changer transitions 0/643 dead transitions. [2024-06-14 14:22:09,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 643 transitions, 8911 flow [2024-06-14 14:22:09,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:22:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:22:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 14:22:09,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5568181818181818 [2024-06-14 14:22:09,989 INFO L175 Difference]: Start difference. First operand has 554 places, 621 transitions, 7175 flow. Second operand 8 states and 196 transitions. [2024-06-14 14:22:09,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 643 transitions, 8911 flow [2024-06-14 14:22:19,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 554 places, 643 transitions, 8787 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 14:22:19,109 INFO L231 Difference]: Finished difference. Result has 555 places, 624 transitions, 7227 flow [2024-06-14 14:22:19,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7051, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7227, PETRI_PLACES=555, PETRI_TRANSITIONS=624} [2024-06-14 14:22:19,109 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 510 predicate places. [2024-06-14 14:22:19,109 INFO L495 AbstractCegarLoop]: Abstraction has has 555 places, 624 transitions, 7227 flow [2024-06-14 14:22:19,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:22:19,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:22:19,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:22:19,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-14 14:22:19,110 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:22:19,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:22:19,110 INFO L85 PathProgramCache]: Analyzing trace with hash -328546892, now seen corresponding path program 12 times [2024-06-14 14:22:19,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:22:19,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169300341] [2024-06-14 14:22:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:22:19,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:22:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:22:19,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:22:19,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:22:19,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169300341] [2024-06-14 14:22:19,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169300341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:22:19,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:22:19,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:22:19,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301023978] [2024-06-14 14:22:19,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:22:19,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:22:19,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:22:19,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:22:19,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:22:19,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:22:19,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 555 places, 624 transitions, 7227 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:22:19,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:22:19,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:22:19,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:22:20,651 INFO L124 PetriNetUnfolderBase]: 2639/4674 cut-off events. [2024-06-14 14:22:20,651 INFO L125 PetriNetUnfolderBase]: For 1080701/1080701 co-relation queries the response was YES. [2024-06-14 14:22:20,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36569 conditions, 4674 events. 2639/4674 cut-off events. For 1080701/1080701 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 32630 event pairs, 429 based on Foata normal form. 1/4673 useless extension candidates. Maximal degree in co-relation 36332. Up to 4030 conditions per place. [2024-06-14 14:22:20,743 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 614 selfloop transitions, 19 changer transitions 0/642 dead transitions. [2024-06-14 14:22:20,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 642 transitions, 8537 flow [2024-06-14 14:22:20,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:22:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:22:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 14:22:20,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5369318181818182 [2024-06-14 14:22:20,745 INFO L175 Difference]: Start difference. First operand has 555 places, 624 transitions, 7227 flow. Second operand 8 states and 189 transitions. [2024-06-14 14:22:20,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 642 transitions, 8537 flow [2024-06-14 14:22:29,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 642 transitions, 8361 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 14:22:29,635 INFO L231 Difference]: Finished difference. Result has 557 places, 624 transitions, 7095 flow [2024-06-14 14:22:29,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7051, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7095, PETRI_PLACES=557, PETRI_TRANSITIONS=624} [2024-06-14 14:22:29,636 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 512 predicate places. [2024-06-14 14:22:29,636 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 624 transitions, 7095 flow [2024-06-14 14:22:29,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:22:29,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:22:29,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:22:29,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-14 14:22:29,637 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 14:22:29,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:22:29,637 INFO L85 PathProgramCache]: Analyzing trace with hash -952706476, now seen corresponding path program 14 times [2024-06-14 14:22:29,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:22:29,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80607637] [2024-06-14 14:22:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:22:29,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:22:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:22:30,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:22:30,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:22:30,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80607637] [2024-06-14 14:22:30,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80607637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:22:30,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:22:30,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:22:30,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991518986] [2024-06-14 14:22:30,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:22:30,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:22:30,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:22:30,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:22:30,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:22:30,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-14 14:22:30,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 624 transitions, 7095 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:22:30,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:22:30,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-14 14:22:30,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:22:31,145 INFO L124 PetriNetUnfolderBase]: 2647/4683 cut-off events. [2024-06-14 14:22:31,146 INFO L125 PetriNetUnfolderBase]: For 1108402/1108402 co-relation queries the response was YES. [2024-06-14 14:22:31,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36639 conditions, 4683 events. 2647/4683 cut-off events. For 1108402/1108402 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 32754 event pairs, 441 based on Foata normal form. 2/4678 useless extension candidates. Maximal degree in co-relation 36401. Up to 3907 conditions per place. [2024-06-14 14:22:31,234 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 542 selfloop transitions, 91 changer transitions 0/642 dead transitions. [2024-06-14 14:22:31,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 642 transitions, 8475 flow [2024-06-14 14:22:31,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:22:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:22:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 14:22:31,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5511363636363636 [2024-06-14 14:22:31,235 INFO L175 Difference]: Start difference. First operand has 557 places, 624 transitions, 7095 flow. Second operand 8 states and 194 transitions. [2024-06-14 14:22:31,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 642 transitions, 8475 flow Killed by 15