./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe013_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe013_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-04 16:02:51,792 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-04 16:02:51,853 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-04 16:02:51,857 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-04 16:02:51,857 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-04 16:02:51,879 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-04 16:02:51,879 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-04 16:02:51,879 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-04 16:02:51,880 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-04 16:02:51,883 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-04 16:02:51,883 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-04 16:02:51,883 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-04 16:02:51,884 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-04 16:02:51,885 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-04 16:02:51,885 INFO L153 SettingsManager]: * Use SBE=true [2024-06-04 16:02:51,885 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-04 16:02:51,886 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-04 16:02:51,886 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-04 16:02:51,886 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-04 16:02:51,886 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-04 16:02:51,886 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-04 16:02:51,887 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-04 16:02:51,887 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-04 16:02:51,887 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-04 16:02:51,887 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-04 16:02:51,888 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-04 16:02:51,888 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-04 16:02:51,888 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-04 16:02:51,888 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-04 16:02:51,889 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-04 16:02:51,890 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-04 16:02:51,890 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-04 16:02:51,890 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:02:51,890 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-04 16:02:51,890 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-04 16:02:51,890 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-04 16:02:51,891 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-04 16:02:51,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-04 16:02:51,891 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-04 16:02:51,891 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-04 16:02:51,891 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-04 16:02:51,891 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-04 16:02:51,892 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-04 16:02:51,892 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-04 16:02:52,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-04 16:02:52,058 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-04 16:02:52,060 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-04 16:02:52,060 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-04 16:02:52,061 INFO L274 PluginConnector]: CDTParser initialized [2024-06-04 16:02:52,061 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2024-06-04 16:02:53,016 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-04 16:02:53,207 INFO L384 CDTParser]: Found 1 translation units. [2024-06-04 16:02:53,208 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2024-06-04 16:02:53,224 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3620ed9/3bf2ecbbbb44473084faa33e4aef4f2d/FLAGe6e67d7d8 [2024-06-04 16:02:53,233 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db3620ed9/3bf2ecbbbb44473084faa33e4aef4f2d [2024-06-04 16:02:53,235 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-04 16:02:53,236 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-04 16:02:53,236 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe013_tso.yml/witness.yml [2024-06-04 16:02:53,335 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-04 16:02:53,336 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-04 16:02:53,337 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-04 16:02:53,337 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-04 16:02:53,343 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-04 16:02:53,344 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:02:53" (1/2) ... [2024-06-04 16:02:53,344 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c6011d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:02:53, skipping insertion in model container [2024-06-04 16:02:53,345 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.06 04:02:53" (1/2) ... [2024-06-04 16:02:53,346 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7946ca4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.06 04:02:53, skipping insertion in model container [2024-06-04 16:02:53,347 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:02:53" (2/2) ... [2024-06-04 16:02:53,347 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c6011d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53, skipping insertion in model container [2024-06-04 16:02:53,347 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:02:53" (2/2) ... [2024-06-04 16:02:53,347 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-04 16:02:53,411 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-04 16:02:53,412 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-04 16:02:53,412 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$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_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )z >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-04 16:02:53,412 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((((((((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )z >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )z >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )z >= 0LL) && (long long )x + (long long )y >= 0LL) && (long long )x + (long long )z >= 0LL) && (long long )y + (long long )z >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p0_EAX) - (long long )z >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )z >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )z >= 0LL) && (2LL + (long long )x) - (long long )z >= 0LL) && (2LL + (long long )y) - (long long )z >= 0LL))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && 0 <= z) && __unbuffered_p0_EAX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && z <= 2) && z <= 127) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) [2024-06-04 16:02:53,412 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-04 16:02:53,413 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-04 16:02:53,449 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-04 16:02:53,730 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:02:53,742 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-04 16:02:53,860 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-04 16:02:53,896 INFO L206 MainTranslator]: Completed translation [2024-06-04 16:02:53,897 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53 WrapperNode [2024-06-04 16:02:53,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-04 16:02:53,898 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-04 16:02:53,898 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-04 16:02:53,898 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-04 16:02:53,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53" (1/1) ... [2024-06-04 16:02:53,918 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53" (1/1) ... [2024-06-04 16:02:53,978 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-04 16:02:53,980 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-04 16:02:53,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-04 16:02:53,981 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-04 16:02:53,981 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-04 16:02:54,001 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53" (1/1) ... [2024-06-04 16:02:54,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53" (1/1) ... [2024-06-04 16:02:54,015 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53" (1/1) ... [2024-06-04 16:02:54,036 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-04 16:02:54,041 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53" (1/1) ... [2024-06-04 16:02:54,041 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53" (1/1) ... [2024-06-04 16:02:54,076 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53" (1/1) ... [2024-06-04 16:02:54,078 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53" (1/1) ... [2024-06-04 16:02:54,085 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53" (1/1) ... [2024-06-04 16:02:54,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53" (1/1) ... [2024-06-04 16:02:54,088 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-04 16:02:54,096 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-04 16:02:54,097 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-04 16:02:54,097 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-04 16:02:54,097 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53" (1/1) ... [2024-06-04 16:02:54,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-04 16:02:54,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-04 16:02:54,141 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-04 16:02:54,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-04 16:02:54,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-04 16:02:54,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-04 16:02:54,175 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-04 16:02:54,175 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-04 16:02:54,175 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-04 16:02:54,176 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-04 16:02:54,176 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-04 16:02:54,177 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-04 16:02:54,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-04 16:02:54,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-04 16:02:54,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-04 16:02:54,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-04 16:02:54,178 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-04 16:02:54,312 INFO L244 CfgBuilder]: Building ICFG [2024-06-04 16:02:54,314 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-04 16:02:54,580 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-04 16:02:54,581 INFO L293 CfgBuilder]: Performing block encoding [2024-06-04 16:02:54,684 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-04 16:02:54,684 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-04 16:02:54,685 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:02:54 BoogieIcfgContainer [2024-06-04 16:02:54,685 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-04 16:02:54,686 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-04 16:02:54,686 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-04 16:02:54,689 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-04 16:02:54,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.06 04:02:53" (1/4) ... [2024-06-04 16:02:54,689 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5584ee83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.06 04:02:54, skipping insertion in model container [2024-06-04 16:02:54,689 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 04.06 04:02:53" (2/4) ... [2024-06-04 16:02:54,690 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5584ee83 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:02:54, skipping insertion in model container [2024-06-04 16:02:54,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 04.06 04:02:53" (3/4) ... [2024-06-04 16:02:54,690 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5584ee83 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 04.06 04:02:54, skipping insertion in model container [2024-06-04 16:02:54,690 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.06 04:02:54" (4/4) ... [2024-06-04 16:02:54,691 INFO L112 eAbstractionObserver]: Analyzing ICFG safe013_tso.i [2024-06-04 16:02:54,704 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-04 16:02:54,705 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-04 16:02:54,705 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-04 16:02:54,751 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-04 16:02:54,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 16:02:54,809 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-04 16:02:54,810 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:02:54,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-04 16:02:54,811 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-04 16:02:54,854 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-04 16:02:54,866 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-04 16:02:54,890 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;@6021a4fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-04 16:02:54,890 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-04 16:02:54,903 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-04 16:02:54,904 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-04 16:02:54,904 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-04 16:02:54,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:54,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-04 16:02:54,905 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:54,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:54,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1787024188, now seen corresponding path program 1 times [2024-06-04 16:02:54,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:54,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524915769] [2024-06-04 16:02:54,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:54,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:55,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:55,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524915769] [2024-06-04 16:02:55,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524915769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:55,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:55,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-04 16:02:55,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643701071] [2024-06-04 16:02:55,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:55,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-04 16:02:55,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-04 16:02:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-04 16:02:55,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-04 16:02:55,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:55,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:55,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-04 16:02:55,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:55,659 INFO L124 PetriNetUnfolderBase]: 603/1013 cut-off events. [2024-06-04 16:02:55,659 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-04 16:02:55,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2007 conditions, 1013 events. 603/1013 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5102 event pairs, 376 based on Foata normal form. 1/954 useless extension candidates. Maximal degree in co-relation 1992. Up to 929 conditions per place. [2024-06-04 16:02:55,671 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 30 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-04 16:02:55,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 169 flow [2024-06-04 16:02:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-04 16:02:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-04 16:02:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-06-04 16:02:55,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6746031746031746 [2024-06-04 16:02:55,682 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 85 transitions. [2024-06-04 16:02:55,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 169 flow [2024-06-04 16:02:55,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:55,686 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-04 16:02:55,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-04 16:02:55,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-04 16:02:55,691 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-04 16:02:55,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:55,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:55,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:55,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-04 16:02:55,692 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:55,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:55,693 INFO L85 PathProgramCache]: Analyzing trace with hash 656708195, now seen corresponding path program 1 times [2024-06-04 16:02:55,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:55,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753474887] [2024-06-04 16:02:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:55,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:55,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:55,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:55,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753474887] [2024-06-04 16:02:55,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753474887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:55,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:55,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:02:55,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003854810] [2024-06-04 16:02:55,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:55,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:02:55,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:55,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:02:55,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:02:56,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-04 16:02:56,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:56,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:56,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-04 16:02:56,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:56,160 INFO L124 PetriNetUnfolderBase]: 604/1022 cut-off events. [2024-06-04 16:02:56,160 INFO L125 PetriNetUnfolderBase]: For 206/214 co-relation queries the response was YES. [2024-06-04 16:02:56,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2332 conditions, 1022 events. 604/1022 cut-off events. For 206/214 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5190 event pairs, 320 based on Foata normal form. 7/999 useless extension candidates. Maximal degree in co-relation 2317. Up to 903 conditions per place. [2024-06-04 16:02:56,166 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 39 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-04 16:02:56,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-04 16:02:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:02:56,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:02:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-06-04 16:02:56,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2024-06-04 16:02:56,170 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 115 transitions. [2024-06-04 16:02:56,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-04 16:02:56,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-04 16:02:56,173 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 174 flow [2024-06-04 16:02:56,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=174, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-06-04 16:02:56,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-04 16:02:56,174 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 174 flow [2024-06-04 16:02:56,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:56,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:56,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:56,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-04 16:02:56,177 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)] === [2024-06-04 16:02:56,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:56,178 INFO L85 PathProgramCache]: Analyzing trace with hash -365005390, now seen corresponding path program 1 times [2024-06-04 16:02:56,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:56,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811723179] [2024-06-04 16:02:56,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:56,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:56,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:56,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:56,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:56,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811723179] [2024-06-04 16:02:56,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811723179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:56,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:56,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-04 16:02:56,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953261819] [2024-06-04 16:02:56,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:56,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-04 16:02:56,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:56,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-04 16:02:56,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-04 16:02:56,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:02:56,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:56,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:56,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:02:56,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:56,767 INFO L124 PetriNetUnfolderBase]: 773/1282 cut-off events. [2024-06-04 16:02:56,767 INFO L125 PetriNetUnfolderBase]: For 880/898 co-relation queries the response was YES. [2024-06-04 16:02:56,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3478 conditions, 1282 events. 773/1282 cut-off events. For 880/898 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6365 event pairs, 428 based on Foata normal form. 8/1287 useless extension candidates. Maximal degree in co-relation 3460. Up to 1172 conditions per place. [2024-06-04 16:02:56,774 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 43 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-04 16:02:56,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 316 flow [2024-06-04 16:02:56,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:02:56,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:02:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-06-04 16:02:56,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:02:56,779 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 174 flow. Second operand 4 states and 104 transitions. [2024-06-04 16:02:56,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 316 flow [2024-06-04 16:02:56,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 58 transitions, 312 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-04 16:02:56,783 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 212 flow [2024-06-04 16:02:56,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-06-04 16:02:56,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-04 16:02:56,784 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 212 flow [2024-06-04 16:02:56,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:56,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:56,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:56,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-04 16:02:56,785 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:56,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:56,786 INFO L85 PathProgramCache]: Analyzing trace with hash 102085025, now seen corresponding path program 1 times [2024-06-04 16:02:56,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:56,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118310140] [2024-06-04 16:02:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:56,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:57,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:57,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118310140] [2024-06-04 16:02:57,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118310140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:57,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:57,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:02:57,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590444345] [2024-06-04 16:02:57,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:57,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:02:57,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:57,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:02:57,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:02:57,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:02:57,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 212 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:02:57,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:57,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:02:57,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:57,301 INFO L124 PetriNetUnfolderBase]: 802/1336 cut-off events. [2024-06-04 16:02:57,301 INFO L125 PetriNetUnfolderBase]: For 1487/1508 co-relation queries the response was YES. [2024-06-04 16:02:57,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3947 conditions, 1336 events. 802/1336 cut-off events. For 1487/1508 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6717 event pairs, 229 based on Foata normal form. 23/1353 useless extension candidates. Maximal degree in co-relation 3926. Up to 1101 conditions per place. [2024-06-04 16:02:57,308 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 17 changer transitions 0/83 dead transitions. [2024-06-04 16:02:57,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 83 transitions, 474 flow [2024-06-04 16:02:57,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:57,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:57,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-04 16:02:57,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468253968253969 [2024-06-04 16:02:57,309 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 212 flow. Second operand 6 states and 163 transitions. [2024-06-04 16:02:57,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 83 transitions, 474 flow [2024-06-04 16:02:57,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 83 transitions, 456 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:57,312 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 274 flow [2024-06-04 16:02:57,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-06-04 16:02:57,313 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-04 16:02:57,313 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 274 flow [2024-06-04 16:02:57,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:02:57,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:57,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:57,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-04 16:02:57,314 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:57,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:57,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1547392333, now seen corresponding path program 1 times [2024-06-04 16:02:57,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:57,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755294034] [2024-06-04 16:02:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:57,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:57,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:57,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:57,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755294034] [2024-06-04 16:02:57,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755294034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:57,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:57,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:02:57,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91405996] [2024-06-04 16:02:57,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:57,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:02:57,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:57,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:02:57,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:02:57,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:57,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 274 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:57,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:57,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:57,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:57,774 INFO L124 PetriNetUnfolderBase]: 950/1576 cut-off events. [2024-06-04 16:02:57,774 INFO L125 PetriNetUnfolderBase]: For 2550/2550 co-relation queries the response was YES. [2024-06-04 16:02:57,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5019 conditions, 1576 events. 950/1576 cut-off events. For 2550/2550 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8120 event pairs, 374 based on Foata normal form. 2/1575 useless extension candidates. Maximal degree in co-relation 4996. Up to 1425 conditions per place. [2024-06-04 16:02:57,782 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 59 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2024-06-04 16:02:57,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 76 transitions, 496 flow [2024-06-04 16:02:57,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:57,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:57,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-04 16:02:57,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-06-04 16:02:57,783 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 274 flow. Second operand 5 states and 121 transitions. [2024-06-04 16:02:57,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 76 transitions, 496 flow [2024-06-04 16:02:57,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 456 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:57,787 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 330 flow [2024-06-04 16:02:57,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=330, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2024-06-04 16:02:57,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-04 16:02:57,788 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 330 flow [2024-06-04 16:02:57,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:57,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:57,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:57,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-04 16:02:57,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:57,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:57,789 INFO L85 PathProgramCache]: Analyzing trace with hash 717847715, now seen corresponding path program 1 times [2024-06-04 16:02:57,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:57,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365721695] [2024-06-04 16:02:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:57,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:58,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:58,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365721695] [2024-06-04 16:02:58,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365721695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:58,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:58,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:02:58,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574134816] [2024-06-04 16:02:58,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:58,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:02:58,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:58,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:02:58,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:02:58,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:02:58,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:58,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:58,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:02:58,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:58,250 INFO L124 PetriNetUnfolderBase]: 918/1520 cut-off events. [2024-06-04 16:02:58,250 INFO L125 PetriNetUnfolderBase]: For 3420/3452 co-relation queries the response was YES. [2024-06-04 16:02:58,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5235 conditions, 1520 events. 918/1520 cut-off events. For 3420/3452 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7799 event pairs, 311 based on Foata normal form. 15/1517 useless extension candidates. Maximal degree in co-relation 5209. Up to 1303 conditions per place. [2024-06-04 16:02:58,260 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 25 changer transitions 0/96 dead transitions. [2024-06-04 16:02:58,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 96 transitions, 660 flow [2024-06-04 16:02:58,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:58,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:58,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-04 16:02:58,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6523809523809524 [2024-06-04 16:02:58,262 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 330 flow. Second operand 5 states and 137 transitions. [2024-06-04 16:02:58,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 96 transitions, 660 flow [2024-06-04 16:02:58,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 96 transitions, 654 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-04 16:02:58,266 INFO L231 Difference]: Finished difference. Result has 65 places, 74 transitions, 482 flow [2024-06-04 16:02:58,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=482, PETRI_PLACES=65, PETRI_TRANSITIONS=74} [2024-06-04 16:02:58,267 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-04 16:02:58,267 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 74 transitions, 482 flow [2024-06-04 16:02:58,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:58,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:58,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:58,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-04 16:02:58,268 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:58,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:58,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1440391685, now seen corresponding path program 2 times [2024-06-04 16:02:58,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:58,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472978582] [2024-06-04 16:02:58,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:58,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:58,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:58,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472978582] [2024-06-04 16:02:58,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472978582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:58,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:58,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:02:58,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268294588] [2024-06-04 16:02:58,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:58,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:02:58,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:58,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:02:58,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:02:58,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:02:58,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 74 transitions, 482 flow. Second operand has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:58,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:58,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:02:58,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:58,714 INFO L124 PetriNetUnfolderBase]: 932/1542 cut-off events. [2024-06-04 16:02:58,714 INFO L125 PetriNetUnfolderBase]: For 5056/5084 co-relation queries the response was YES. [2024-06-04 16:02:58,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6004 conditions, 1542 events. 932/1542 cut-off events. For 5056/5084 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7964 event pairs, 311 based on Foata normal form. 15/1542 useless extension candidates. Maximal degree in co-relation 5974. Up to 1328 conditions per place. [2024-06-04 16:02:58,724 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 58 selfloop transitions, 24 changer transitions 0/93 dead transitions. [2024-06-04 16:02:58,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 93 transitions, 726 flow [2024-06-04 16:02:58,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:02:58,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:02:58,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-04 16:02:58,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-04 16:02:58,726 INFO L175 Difference]: Start difference. First operand has 65 places, 74 transitions, 482 flow. Second operand 5 states and 132 transitions. [2024-06-04 16:02:58,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 93 transitions, 726 flow [2024-06-04 16:02:58,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 93 transitions, 698 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-06-04 16:02:58,733 INFO L231 Difference]: Finished difference. Result has 71 places, 76 transitions, 538 flow [2024-06-04 16:02:58,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=538, PETRI_PLACES=71, PETRI_TRANSITIONS=76} [2024-06-04 16:02:58,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-04 16:02:58,734 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 76 transitions, 538 flow [2024-06-04 16:02:58,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:58,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:58,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:58,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-04 16:02:58,734 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:58,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash 376205262, now seen corresponding path program 1 times [2024-06-04 16:02:58,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:58,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846123477] [2024-06-04 16:02:58,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:58,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:58,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:58,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:58,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846123477] [2024-06-04 16:02:58,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846123477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:58,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:58,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:02:58,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495076584] [2024-06-04 16:02:58,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:58,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:02:58,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:58,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:02:58,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:02:59,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:59,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 76 transitions, 538 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:59,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:59,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:59,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:59,194 INFO L124 PetriNetUnfolderBase]: 983/1632 cut-off events. [2024-06-04 16:02:59,194 INFO L125 PetriNetUnfolderBase]: For 5761/5764 co-relation queries the response was YES. [2024-06-04 16:02:59,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6292 conditions, 1632 events. 983/1632 cut-off events. For 5761/5764 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8390 event pairs, 347 based on Foata normal form. 2/1629 useless extension candidates. Maximal degree in co-relation 6258. Up to 1415 conditions per place. [2024-06-04 16:02:59,204 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 86 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-04 16:02:59,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 113 transitions, 918 flow [2024-06-04 16:02:59,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:59,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 16:02:59,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-04 16:02:59,206 INFO L175 Difference]: Start difference. First operand has 71 places, 76 transitions, 538 flow. Second operand 6 states and 151 transitions. [2024-06-04 16:02:59,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 113 transitions, 918 flow [2024-06-04 16:02:59,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 858 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-04 16:02:59,214 INFO L231 Difference]: Finished difference. Result has 76 places, 88 transitions, 630 flow [2024-06-04 16:02:59,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=630, PETRI_PLACES=76, PETRI_TRANSITIONS=88} [2024-06-04 16:02:59,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-04 16:02:59,215 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 88 transitions, 630 flow [2024-06-04 16:02:59,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:59,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:59,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:59,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-04 16:02:59,215 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:59,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:59,216 INFO L85 PathProgramCache]: Analyzing trace with hash -761795358, now seen corresponding path program 2 times [2024-06-04 16:02:59,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:59,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104071164] [2024-06-04 16:02:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:59,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:59,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:59,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:59,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104071164] [2024-06-04 16:02:59,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104071164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:59,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:59,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:02:59,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058843231] [2024-06-04 16:02:59,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:59,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:02:59,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:59,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:02:59,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:02:59,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:59,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 88 transitions, 630 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:59,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:59,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:59,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:02:59,671 INFO L124 PetriNetUnfolderBase]: 994/1648 cut-off events. [2024-06-04 16:02:59,671 INFO L125 PetriNetUnfolderBase]: For 6980/6980 co-relation queries the response was YES. [2024-06-04 16:02:59,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6701 conditions, 1648 events. 994/1648 cut-off events. For 6980/6980 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8490 event pairs, 346 based on Foata normal form. 2/1644 useless extension candidates. Maximal degree in co-relation 6664. Up to 1427 conditions per place. [2024-06-04 16:02:59,682 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 83 selfloop transitions, 24 changer transitions 0/114 dead transitions. [2024-06-04 16:02:59,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 114 transitions, 961 flow [2024-06-04 16:02:59,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:02:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:02:59,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:02:59,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:02:59,684 INFO L175 Difference]: Start difference. First operand has 76 places, 88 transitions, 630 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:02:59,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 114 transitions, 961 flow [2024-06-04 16:02:59,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 114 transitions, 929 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-04 16:02:59,726 INFO L231 Difference]: Finished difference. Result has 81 places, 93 transitions, 696 flow [2024-06-04 16:02:59,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=696, PETRI_PLACES=81, PETRI_TRANSITIONS=93} [2024-06-04 16:02:59,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-04 16:02:59,726 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 93 transitions, 696 flow [2024-06-04 16:02:59,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:59,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:02:59,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:02:59,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-04 16:02:59,727 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:02:59,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:02:59,728 INFO L85 PathProgramCache]: Analyzing trace with hash 982390590, now seen corresponding path program 3 times [2024-06-04 16:02:59,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:02:59,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015111368] [2024-06-04 16:02:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:02:59,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:02:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:02:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:02:59,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:02:59,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015111368] [2024-06-04 16:02:59,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015111368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:02:59,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:02:59,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:02:59,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31718925] [2024-06-04 16:02:59,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:02:59,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:02:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:02:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:02:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:02:59,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:02:59,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 93 transitions, 696 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:02:59,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:02:59,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:02:59,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:00,202 INFO L124 PetriNetUnfolderBase]: 989/1641 cut-off events. [2024-06-04 16:03:00,202 INFO L125 PetriNetUnfolderBase]: For 7977/7977 co-relation queries the response was YES. [2024-06-04 16:03:00,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6815 conditions, 1641 events. 989/1641 cut-off events. For 7977/7977 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8419 event pairs, 346 based on Foata normal form. 2/1637 useless extension candidates. Maximal degree in co-relation 6776. Up to 1422 conditions per place. [2024-06-04 16:03:00,213 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 80 selfloop transitions, 26 changer transitions 0/113 dead transitions. [2024-06-04 16:03:00,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 113 transitions, 964 flow [2024-06-04 16:03:00,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:00,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:03:00,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-04 16:03:00,215 INFO L175 Difference]: Start difference. First operand has 81 places, 93 transitions, 696 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:03:00,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 113 transitions, 964 flow [2024-06-04 16:03:00,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 113 transitions, 926 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-04 16:03:00,226 INFO L231 Difference]: Finished difference. Result has 85 places, 94 transitions, 726 flow [2024-06-04 16:03:00,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=726, PETRI_PLACES=85, PETRI_TRANSITIONS=94} [2024-06-04 16:03:00,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-04 16:03:00,227 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 94 transitions, 726 flow [2024-06-04 16:03:00,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:00,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:00,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:00,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-04 16:03:00,228 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:00,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:00,228 INFO L85 PathProgramCache]: Analyzing trace with hash 985373740, now seen corresponding path program 1 times [2024-06-04 16:03:00,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:00,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500576121] [2024-06-04 16:03:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:00,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:00,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:00,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:00,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500576121] [2024-06-04 16:03:00,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500576121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:00,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:00,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:03:00,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979002209] [2024-06-04 16:03:00,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:00,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:03:00,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:00,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:03:00,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:03:00,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:00,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 94 transitions, 726 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:00,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:00,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:00,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:00,739 INFO L124 PetriNetUnfolderBase]: 981/1634 cut-off events. [2024-06-04 16:03:00,740 INFO L125 PetriNetUnfolderBase]: For 9181/9181 co-relation queries the response was YES. [2024-06-04 16:03:00,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6878 conditions, 1634 events. 981/1634 cut-off events. For 9181/9181 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8407 event pairs, 323 based on Foata normal form. 4/1635 useless extension candidates. Maximal degree in co-relation 6837. Up to 1452 conditions per place. [2024-06-04 16:03:00,785 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 97 selfloop transitions, 12 changer transitions 0/116 dead transitions. [2024-06-04 16:03:00,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 116 transitions, 1010 flow [2024-06-04 16:03:00,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:00,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:00,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 16:03:00,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:03:00,787 INFO L175 Difference]: Start difference. First operand has 85 places, 94 transitions, 726 flow. Second operand 6 states and 142 transitions. [2024-06-04 16:03:00,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 116 transitions, 1010 flow [2024-06-04 16:03:00,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 116 transitions, 970 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:00,797 INFO L231 Difference]: Finished difference. Result has 88 places, 96 transitions, 737 flow [2024-06-04 16:03:00,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=737, PETRI_PLACES=88, PETRI_TRANSITIONS=96} [2024-06-04 16:03:00,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 45 predicate places. [2024-06-04 16:03:00,798 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 96 transitions, 737 flow [2024-06-04 16:03:00,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:00,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:00,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:00,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-04 16:03:00,799 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:00,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:00,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1642823934, now seen corresponding path program 1 times [2024-06-04 16:03:00,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:00,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932404680] [2024-06-04 16:03:00,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:00,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:01,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:01,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932404680] [2024-06-04 16:03:01,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932404680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:01,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:01,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:01,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925081416] [2024-06-04 16:03:01,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:01,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:01,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:01,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:01,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:01,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:03:01,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 96 transitions, 737 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 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) [2024-06-04 16:03:01,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:01,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:03:01,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:01,330 INFO L124 PetriNetUnfolderBase]: 954/1593 cut-off events. [2024-06-04 16:03:01,330 INFO L125 PetriNetUnfolderBase]: For 11646/11666 co-relation queries the response was YES. [2024-06-04 16:03:01,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7068 conditions, 1593 events. 954/1593 cut-off events. For 11646/11666 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8291 event pairs, 280 based on Foata normal form. 18/1563 useless extension candidates. Maximal degree in co-relation 7026. Up to 1328 conditions per place. [2024-06-04 16:03:01,339 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2024-06-04 16:03:01,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 119 transitions, 1037 flow [2024-06-04 16:03:01,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:03:01,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:03:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-04 16:03:01,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2024-06-04 16:03:01,341 INFO L175 Difference]: Start difference. First operand has 88 places, 96 transitions, 737 flow. Second operand 5 states and 136 transitions. [2024-06-04 16:03:01,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 119 transitions, 1037 flow [2024-06-04 16:03:01,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 119 transitions, 1004 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:01,353 INFO L231 Difference]: Finished difference. Result has 89 places, 100 transitions, 815 flow [2024-06-04 16:03:01,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=815, PETRI_PLACES=89, PETRI_TRANSITIONS=100} [2024-06-04 16:03:01,354 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-04 16:03:01,354 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 100 transitions, 815 flow [2024-06-04 16:03:01,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 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) [2024-06-04 16:03:01,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:01,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:01,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-04 16:03:01,355 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:01,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:01,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1638062334, now seen corresponding path program 2 times [2024-06-04 16:03:01,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:01,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707998275] [2024-06-04 16:03:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:01,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:01,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:01,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:01,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707998275] [2024-06-04 16:03:01,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707998275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:01,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:01,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:01,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868066851] [2024-06-04 16:03:01,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:01,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:01,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:01,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:01,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:01,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:03:01,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 100 transitions, 815 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 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) [2024-06-04 16:03:01,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:01,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:03:01,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:01,899 INFO L124 PetriNetUnfolderBase]: 982/1647 cut-off events. [2024-06-04 16:03:01,899 INFO L125 PetriNetUnfolderBase]: For 13820/13846 co-relation queries the response was YES. [2024-06-04 16:03:01,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7753 conditions, 1647 events. 982/1647 cut-off events. For 13820/13846 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8700 event pairs, 281 based on Foata normal form. 25/1620 useless extension candidates. Maximal degree in co-relation 7710. Up to 1275 conditions per place. [2024-06-04 16:03:01,909 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 53 changer transitions 0/149 dead transitions. [2024-06-04 16:03:01,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 149 transitions, 1361 flow [2024-06-04 16:03:01,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:01,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 231 transitions. [2024-06-04 16:03:01,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-04 16:03:01,911 INFO L175 Difference]: Start difference. First operand has 89 places, 100 transitions, 815 flow. Second operand 9 states and 231 transitions. [2024-06-04 16:03:01,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 149 transitions, 1361 flow [2024-06-04 16:03:01,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 149 transitions, 1282 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:01,928 INFO L231 Difference]: Finished difference. Result has 94 places, 111 transitions, 962 flow [2024-06-04 16:03:01,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=744, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=962, PETRI_PLACES=94, PETRI_TRANSITIONS=111} [2024-06-04 16:03:01,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-04 16:03:01,929 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 111 transitions, 962 flow [2024-06-04 16:03:01,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 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) [2024-06-04 16:03:01,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:01,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:01,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-04 16:03:01,929 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:01,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:01,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1236958180, now seen corresponding path program 3 times [2024-06-04 16:03:01,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:01,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409494732] [2024-06-04 16:03:01,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:01,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:02,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:02,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409494732] [2024-06-04 16:03:02,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409494732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:02,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:02,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:02,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665409294] [2024-06-04 16:03:02,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:02,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:02,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:02,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:02,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:02,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:03:02,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 111 transitions, 962 flow. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 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) [2024-06-04 16:03:02,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:02,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:03:02,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:02,444 INFO L124 PetriNetUnfolderBase]: 973/1632 cut-off events. [2024-06-04 16:03:02,444 INFO L125 PetriNetUnfolderBase]: For 14544/14574 co-relation queries the response was YES. [2024-06-04 16:03:02,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8008 conditions, 1632 events. 973/1632 cut-off events. For 14544/14574 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8638 event pairs, 284 based on Foata normal form. 31/1611 useless extension candidates. Maximal degree in co-relation 7965. Up to 1268 conditions per place. [2024-06-04 16:03:02,454 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 78 selfloop transitions, 49 changer transitions 0/145 dead transitions. [2024-06-04 16:03:02,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 145 transitions, 1396 flow [2024-06-04 16:03:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-04 16:03:02,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-04 16:03:02,456 INFO L175 Difference]: Start difference. First operand has 94 places, 111 transitions, 962 flow. Second operand 8 states and 206 transitions. [2024-06-04 16:03:02,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 145 transitions, 1396 flow [2024-06-04 16:03:02,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 145 transitions, 1278 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:02,469 INFO L231 Difference]: Finished difference. Result has 98 places, 111 transitions, 952 flow [2024-06-04 16:03:02,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=844, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=952, PETRI_PLACES=98, PETRI_TRANSITIONS=111} [2024-06-04 16:03:02,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-04 16:03:02,470 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 111 transitions, 952 flow [2024-06-04 16:03:02,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 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) [2024-06-04 16:03:02,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:02,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:02,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-04 16:03:02,471 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)] === [2024-06-04 16:03:02,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:02,471 INFO L85 PathProgramCache]: Analyzing trace with hash -371459253, now seen corresponding path program 1 times [2024-06-04 16:03:02,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:02,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612065843] [2024-06-04 16:03:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:02,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:02,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:02,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612065843] [2024-06-04 16:03:02,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612065843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:02,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:02,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-04 16:03:02,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014057493] [2024-06-04 16:03:02,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:02,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-04 16:03:02,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:02,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-04 16:03:02,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-04 16:03:02,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:03:02,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 111 transitions, 952 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:02,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:02,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:03:02,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:02,973 INFO L124 PetriNetUnfolderBase]: 942/1583 cut-off events. [2024-06-04 16:03:02,973 INFO L125 PetriNetUnfolderBase]: For 13496/13501 co-relation queries the response was YES. [2024-06-04 16:03:02,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7694 conditions, 1583 events. 942/1583 cut-off events. For 13496/13501 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8345 event pairs, 288 based on Foata normal form. 7/1580 useless extension candidates. Maximal degree in co-relation 7649. Up to 1339 conditions per place. [2024-06-04 16:03:02,984 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 83 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-06-04 16:03:02,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 1180 flow [2024-06-04 16:03:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-04 16:03:02,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-04 16:03:02,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-06-04 16:03:02,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-04 16:03:02,986 INFO L175 Difference]: Start difference. First operand has 98 places, 111 transitions, 952 flow. Second operand 4 states and 103 transitions. [2024-06-04 16:03:02,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 1180 flow [2024-06-04 16:03:03,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 120 transitions, 1075 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:03,002 INFO L231 Difference]: Finished difference. Result has 96 places, 111 transitions, 894 flow [2024-06-04 16:03:03,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=894, PETRI_PLACES=96, PETRI_TRANSITIONS=111} [2024-06-04 16:03:03,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-04 16:03:03,004 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 111 transitions, 894 flow [2024-06-04 16:03:03,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:03,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:03,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:03,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-04 16:03:03,005 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)] === [2024-06-04 16:03:03,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:03,005 INFO L85 PathProgramCache]: Analyzing trace with hash 433892943, now seen corresponding path program 1 times [2024-06-04 16:03:03,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:03,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800986690] [2024-06-04 16:03:03,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:03,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:03,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:03,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:03,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:03,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800986690] [2024-06-04 16:03:03,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800986690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:03,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:03,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:03,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746145239] [2024-06-04 16:03:03,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:03,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:03,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:03,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:03,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:03,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:03,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 111 transitions, 894 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-04 16:03:03,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:03,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:03,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:03,548 INFO L124 PetriNetUnfolderBase]: 1008/1672 cut-off events. [2024-06-04 16:03:03,549 INFO L125 PetriNetUnfolderBase]: For 14546/14546 co-relation queries the response was YES. [2024-06-04 16:03:03,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8021 conditions, 1672 events. 1008/1672 cut-off events. For 14546/14546 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8595 event pairs, 295 based on Foata normal form. 2/1671 useless extension candidates. Maximal degree in co-relation 7976. Up to 1476 conditions per place. [2024-06-04 16:03:03,559 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 126 selfloop transitions, 16 changer transitions 0/149 dead transitions. [2024-06-04 16:03:03,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 149 transitions, 1318 flow [2024-06-04 16:03:03,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:03:03,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-04 16:03:03,560 INFO L175 Difference]: Start difference. First operand has 96 places, 111 transitions, 894 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:03:03,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 149 transitions, 1318 flow [2024-06-04 16:03:03,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 149 transitions, 1270 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:03,576 INFO L231 Difference]: Finished difference. Result has 102 places, 120 transitions, 974 flow [2024-06-04 16:03:03,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=850, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=974, PETRI_PLACES=102, PETRI_TRANSITIONS=120} [2024-06-04 16:03:03,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-04 16:03:03,577 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 120 transitions, 974 flow [2024-06-04 16:03:03,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-04 16:03:03,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:03,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:03,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-04 16:03:03,578 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:03,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash 759675983, now seen corresponding path program 2 times [2024-06-04 16:03:03,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:03,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985610316] [2024-06-04 16:03:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:03,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:03,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:03,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985610316] [2024-06-04 16:03:03,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985610316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:03,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:03,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:03,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377068813] [2024-06-04 16:03:03,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:03,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:03,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:03,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:03,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:03,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:03,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 120 transitions, 974 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:03,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:03,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:03,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:04,152 INFO L124 PetriNetUnfolderBase]: 1035/1719 cut-off events. [2024-06-04 16:03:04,152 INFO L125 PetriNetUnfolderBase]: For 16863/16866 co-relation queries the response was YES. [2024-06-04 16:03:04,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8614 conditions, 1719 events. 1035/1719 cut-off events. For 16863/16866 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8850 event pairs, 303 based on Foata normal form. 2/1716 useless extension candidates. Maximal degree in co-relation 8567. Up to 1393 conditions per place. [2024-06-04 16:03:04,165 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 123 selfloop transitions, 44 changer transitions 0/174 dead transitions. [2024-06-04 16:03:04,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 174 transitions, 1626 flow [2024-06-04 16:03:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-04 16:03:04,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-04 16:03:04,167 INFO L175 Difference]: Start difference. First operand has 102 places, 120 transitions, 974 flow. Second operand 9 states and 224 transitions. [2024-06-04 16:03:04,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 174 transitions, 1626 flow [2024-06-04 16:03:04,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 174 transitions, 1580 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:04,192 INFO L231 Difference]: Finished difference. Result has 110 places, 132 transitions, 1149 flow [2024-06-04 16:03:04,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1149, PETRI_PLACES=110, PETRI_TRANSITIONS=132} [2024-06-04 16:03:04,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-04 16:03:04,193 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 132 transitions, 1149 flow [2024-06-04 16:03:04,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:04,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:04,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:04,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-04 16:03:04,194 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:04,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:04,194 INFO L85 PathProgramCache]: Analyzing trace with hash 538136321, now seen corresponding path program 3 times [2024-06-04 16:03:04,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:04,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715582079] [2024-06-04 16:03:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:04,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:04,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:04,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:04,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715582079] [2024-06-04 16:03:04,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715582079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:04,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:04,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:04,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286887859] [2024-06-04 16:03:04,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:04,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:04,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:04,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:04,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:04,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:04,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 132 transitions, 1149 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:04,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:04,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:04,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:04,747 INFO L124 PetriNetUnfolderBase]: 1030/1712 cut-off events. [2024-06-04 16:03:04,747 INFO L125 PetriNetUnfolderBase]: For 19141/19144 co-relation queries the response was YES. [2024-06-04 16:03:04,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9073 conditions, 1712 events. 1030/1712 cut-off events. For 19141/19144 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8869 event pairs, 303 based on Foata normal form. 2/1709 useless extension candidates. Maximal degree in co-relation 9023. Up to 1388 conditions per place. [2024-06-04 16:03:04,759 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 123 selfloop transitions, 47 changer transitions 0/177 dead transitions. [2024-06-04 16:03:04,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 177 transitions, 1675 flow [2024-06-04 16:03:04,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-04 16:03:04,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:03:04,761 INFO L175 Difference]: Start difference. First operand has 110 places, 132 transitions, 1149 flow. Second operand 10 states and 240 transitions. [2024-06-04 16:03:04,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 177 transitions, 1675 flow [2024-06-04 16:03:04,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 177 transitions, 1591 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:04,783 INFO L231 Difference]: Finished difference. Result has 116 places, 133 transitions, 1178 flow [2024-06-04 16:03:04,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1178, PETRI_PLACES=116, PETRI_TRANSITIONS=133} [2024-06-04 16:03:04,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-04 16:03:04,784 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 133 transitions, 1178 flow [2024-06-04 16:03:04,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:04,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:04,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:04,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-04 16:03:04,784 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:04,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash 538144257, now seen corresponding path program 1 times [2024-06-04 16:03:04,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:04,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376390030] [2024-06-04 16:03:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:04,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:05,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:05,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:05,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376390030] [2024-06-04 16:03:05,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376390030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:05,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:05,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:05,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913180036] [2024-06-04 16:03:05,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:05,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:05,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:05,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:05,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:05,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:05,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 133 transitions, 1178 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-04 16:03:05,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:05,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:05,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:05,277 INFO L124 PetriNetUnfolderBase]: 1047/1739 cut-off events. [2024-06-04 16:03:05,277 INFO L125 PetriNetUnfolderBase]: For 21159/21162 co-relation queries the response was YES. [2024-06-04 16:03:05,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9327 conditions, 1739 events. 1047/1739 cut-off events. For 21159/21162 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8978 event pairs, 299 based on Foata normal form. 4/1738 useless extension candidates. Maximal degree in co-relation 9275. Up to 1487 conditions per place. [2024-06-04 16:03:05,289 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 128 selfloop transitions, 27 changer transitions 0/162 dead transitions. [2024-06-04 16:03:05,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 162 transitions, 1570 flow [2024-06-04 16:03:05,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:05,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:03:05,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 16:03:05,291 INFO L175 Difference]: Start difference. First operand has 116 places, 133 transitions, 1178 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:03:05,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 162 transitions, 1570 flow [2024-06-04 16:03:05,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 162 transitions, 1486 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:05,357 INFO L231 Difference]: Finished difference. Result has 116 places, 135 transitions, 1173 flow [2024-06-04 16:03:05,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1173, PETRI_PLACES=116, PETRI_TRANSITIONS=135} [2024-06-04 16:03:05,358 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-04 16:03:05,358 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 135 transitions, 1173 flow [2024-06-04 16:03:05,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-04 16:03:05,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:05,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:05,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-04 16:03:05,359 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:05,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:05,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1933730671, now seen corresponding path program 4 times [2024-06-04 16:03:05,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:05,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431882548] [2024-06-04 16:03:05,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:05,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:05,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:05,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431882548] [2024-06-04 16:03:05,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431882548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:05,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:05,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:05,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948521612] [2024-06-04 16:03:05,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:05,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:05,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:05,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:05,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:05,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:05,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 135 transitions, 1173 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:05,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:05,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:05,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:05,900 INFO L124 PetriNetUnfolderBase]: 1058/1755 cut-off events. [2024-06-04 16:03:05,900 INFO L125 PetriNetUnfolderBase]: For 22641/22641 co-relation queries the response was YES. [2024-06-04 16:03:05,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9576 conditions, 1755 events. 1058/1755 cut-off events. For 22641/22641 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9090 event pairs, 300 based on Foata normal form. 2/1751 useless extension candidates. Maximal degree in co-relation 9523. Up to 1427 conditions per place. [2024-06-04 16:03:05,914 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 120 selfloop transitions, 53 changer transitions 0/180 dead transitions. [2024-06-04 16:03:05,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 180 transitions, 1734 flow [2024-06-04 16:03:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:05,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 234 transitions. [2024-06-04 16:03:05,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-04 16:03:05,917 INFO L175 Difference]: Start difference. First operand has 116 places, 135 transitions, 1173 flow. Second operand 10 states and 234 transitions. [2024-06-04 16:03:05,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 180 transitions, 1734 flow [2024-06-04 16:03:05,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 180 transitions, 1673 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:05,940 INFO L231 Difference]: Finished difference. Result has 122 places, 140 transitions, 1285 flow [2024-06-04 16:03:05,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1285, PETRI_PLACES=122, PETRI_TRANSITIONS=140} [2024-06-04 16:03:05,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 79 predicate places. [2024-06-04 16:03:05,941 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 140 transitions, 1285 flow [2024-06-04 16:03:05,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:05,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:05,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:05,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-04 16:03:05,941 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:05,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:05,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1071930433, now seen corresponding path program 5 times [2024-06-04 16:03:05,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:05,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404996356] [2024-06-04 16:03:05,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:05,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:05,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:06,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:06,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404996356] [2024-06-04 16:03:06,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404996356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:06,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:06,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:06,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474547149] [2024-06-04 16:03:06,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:06,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:06,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:06,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:06,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:06,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:06,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 140 transitions, 1285 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:06,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:06,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:06,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:06,506 INFO L124 PetriNetUnfolderBase]: 1069/1776 cut-off events. [2024-06-04 16:03:06,509 INFO L125 PetriNetUnfolderBase]: For 25017/25017 co-relation queries the response was YES. [2024-06-04 16:03:06,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9932 conditions, 1776 events. 1069/1776 cut-off events. For 25017/25017 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9231 event pairs, 300 based on Foata normal form. 2/1772 useless extension candidates. Maximal degree in co-relation 9877. Up to 1439 conditions per place. [2024-06-04 16:03:06,531 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 127 selfloop transitions, 53 changer transitions 0/187 dead transitions. [2024-06-04 16:03:06,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 187 transitions, 1866 flow [2024-06-04 16:03:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-04 16:03:06,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-04 16:03:06,542 INFO L175 Difference]: Start difference. First operand has 122 places, 140 transitions, 1285 flow. Second operand 11 states and 258 transitions. [2024-06-04 16:03:06,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 187 transitions, 1866 flow [2024-06-04 16:03:06,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 187 transitions, 1764 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:06,606 INFO L231 Difference]: Finished difference. Result has 127 places, 143 transitions, 1334 flow [2024-06-04 16:03:06,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1334, PETRI_PLACES=127, PETRI_TRANSITIONS=143} [2024-06-04 16:03:06,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-04 16:03:06,621 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 143 transitions, 1334 flow [2024-06-04 16:03:06,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:06,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:06,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:06,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-04 16:03:06,623 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:06,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:06,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1785136207, now seen corresponding path program 6 times [2024-06-04 16:03:06,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:06,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354788234] [2024-06-04 16:03:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:06,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:06,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:06,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:06,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:06,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354788234] [2024-06-04 16:03:06,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354788234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:06,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:06,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:06,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116658334] [2024-06-04 16:03:06,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:06,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:06,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:06,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:06,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:06,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:06,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 143 transitions, 1334 flow. Second operand has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:06,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:06,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:06,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:07,214 INFO L124 PetriNetUnfolderBase]: 1064/1769 cut-off events. [2024-06-04 16:03:07,214 INFO L125 PetriNetUnfolderBase]: For 26801/26801 co-relation queries the response was YES. [2024-06-04 16:03:07,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9952 conditions, 1769 events. 1064/1769 cut-off events. For 26801/26801 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9190 event pairs, 300 based on Foata normal form. 2/1765 useless extension candidates. Maximal degree in co-relation 9896. Up to 1434 conditions per place. [2024-06-04 16:03:07,226 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 118 selfloop transitions, 52 changer transitions 0/177 dead transitions. [2024-06-04 16:03:07,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 177 transitions, 1760 flow [2024-06-04 16:03:07,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:07,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-04 16:03:07,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5661375661375662 [2024-06-04 16:03:07,228 INFO L175 Difference]: Start difference. First operand has 127 places, 143 transitions, 1334 flow. Second operand 9 states and 214 transitions. [2024-06-04 16:03:07,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 177 transitions, 1760 flow [2024-06-04 16:03:07,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 177 transitions, 1594 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:07,291 INFO L231 Difference]: Finished difference. Result has 126 places, 143 transitions, 1280 flow [2024-06-04 16:03:07,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1280, PETRI_PLACES=126, PETRI_TRANSITIONS=143} [2024-06-04 16:03:07,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-04 16:03:07,291 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 143 transitions, 1280 flow [2024-06-04 16:03:07,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.625) internal successors, (125), 8 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:07,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:07,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:07,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-04 16:03:07,292 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:07,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:07,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1785351533, now seen corresponding path program 2 times [2024-06-04 16:03:07,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:07,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533760862] [2024-06-04 16:03:07,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:07,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:07,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:07,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:07,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533760862] [2024-06-04 16:03:07,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533760862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:07,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:07,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:07,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129075676] [2024-06-04 16:03:07,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:07,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:07,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:07,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:07,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:07,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:07,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 143 transitions, 1280 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-04 16:03:07,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:07,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:07,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:07,788 INFO L124 PetriNetUnfolderBase]: 1081/1796 cut-off events. [2024-06-04 16:03:07,791 INFO L125 PetriNetUnfolderBase]: For 29288/29288 co-relation queries the response was YES. [2024-06-04 16:03:07,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10055 conditions, 1796 events. 1081/1796 cut-off events. For 29288/29288 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9347 event pairs, 300 based on Foata normal form. 4/1794 useless extension candidates. Maximal degree in co-relation 9999. Up to 1539 conditions per place. [2024-06-04 16:03:07,805 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 135 selfloop transitions, 27 changer transitions 0/169 dead transitions. [2024-06-04 16:03:07,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 169 transitions, 1682 flow [2024-06-04 16:03:07,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:07,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:07,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:03:07,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-04 16:03:07,807 INFO L175 Difference]: Start difference. First operand has 126 places, 143 transitions, 1280 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:03:07,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 169 transitions, 1682 flow [2024-06-04 16:03:07,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 169 transitions, 1578 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:07,841 INFO L231 Difference]: Finished difference. Result has 125 places, 145 transitions, 1259 flow [2024-06-04 16:03:07,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1259, PETRI_PLACES=125, PETRI_TRANSITIONS=145} [2024-06-04 16:03:07,841 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-04 16:03:07,841 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 145 transitions, 1259 flow [2024-06-04 16:03:07,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-04 16:03:07,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:07,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:07,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-04 16:03:07,842 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:07,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:07,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2041852043, now seen corresponding path program 3 times [2024-06-04 16:03:07,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:07,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020628277] [2024-06-04 16:03:07,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:07,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:08,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:08,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020628277] [2024-06-04 16:03:08,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020628277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:08,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:08,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:08,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304037338] [2024-06-04 16:03:08,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:08,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:08,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:08,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:08,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:08,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:08,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 145 transitions, 1259 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-04 16:03:08,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:08,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:08,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:08,398 INFO L124 PetriNetUnfolderBase]: 1098/1828 cut-off events. [2024-06-04 16:03:08,398 INFO L125 PetriNetUnfolderBase]: For 31751/31751 co-relation queries the response was YES. [2024-06-04 16:03:08,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10314 conditions, 1828 events. 1098/1828 cut-off events. For 31751/31751 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9575 event pairs, 305 based on Foata normal form. 4/1826 useless extension candidates. Maximal degree in co-relation 10257. Up to 1566 conditions per place. [2024-06-04 16:03:08,413 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 136 selfloop transitions, 28 changer transitions 0/171 dead transitions. [2024-06-04 16:03:08,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 171 transitions, 1669 flow [2024-06-04 16:03:08,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:08,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:08,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:03:08,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-04 16:03:08,414 INFO L175 Difference]: Start difference. First operand has 125 places, 145 transitions, 1259 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:03:08,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 171 transitions, 1669 flow [2024-06-04 16:03:08,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 171 transitions, 1604 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:08,445 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1283 flow [2024-06-04 16:03:08,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1283, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-04 16:03:08,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-04 16:03:08,445 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1283 flow [2024-06-04 16:03:08,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-04 16:03:08,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:08,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:08,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-04 16:03:08,446 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:08,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:08,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1597782161, now seen corresponding path program 4 times [2024-06-04 16:03:08,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:08,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624671391] [2024-06-04 16:03:08,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:08,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:08,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:08,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624671391] [2024-06-04 16:03:08,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624671391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:08,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:08,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:08,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998790257] [2024-06-04 16:03:08,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:08,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:08,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:08,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:08,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:08,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:08,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1283 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-04 16:03:08,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:08,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:08,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:09,071 INFO L124 PetriNetUnfolderBase]: 1090/1815 cut-off events. [2024-06-04 16:03:09,071 INFO L125 PetriNetUnfolderBase]: For 33979/33979 co-relation queries the response was YES. [2024-06-04 16:03:09,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10361 conditions, 1815 events. 1090/1815 cut-off events. For 33979/33979 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9504 event pairs, 274 based on Foata normal form. 4/1813 useless extension candidates. Maximal degree in co-relation 10303. Up to 1477 conditions per place. [2024-06-04 16:03:09,083 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 132 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2024-06-04 16:03:09,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 174 transitions, 1705 flow [2024-06-04 16:03:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:09,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:09,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:03:09,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-04 16:03:09,086 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1283 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:03:09,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 174 transitions, 1705 flow [2024-06-04 16:03:09,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 174 transitions, 1634 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:09,134 INFO L231 Difference]: Finished difference. Result has 129 places, 149 transitions, 1319 flow [2024-06-04 16:03:09,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1319, PETRI_PLACES=129, PETRI_TRANSITIONS=149} [2024-06-04 16:03:09,135 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-04 16:03:09,136 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 149 transitions, 1319 flow [2024-06-04 16:03:09,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-04 16:03:09,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:09,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:09,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-04 16:03:09,136 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:09,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:09,137 INFO L85 PathProgramCache]: Analyzing trace with hash -794940339, now seen corresponding path program 1 times [2024-06-04 16:03:09,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:09,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206575404] [2024-06-04 16:03:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:09,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:09,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:09,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206575404] [2024-06-04 16:03:09,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206575404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:09,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:09,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:09,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097400254] [2024-06-04 16:03:09,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:09,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:09,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:09,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:09,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:09,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:03:09,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 149 transitions, 1319 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:09,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:09,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:03:09,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:09,842 INFO L124 PetriNetUnfolderBase]: 1206/2012 cut-off events. [2024-06-04 16:03:09,843 INFO L125 PetriNetUnfolderBase]: For 48934/48974 co-relation queries the response was YES. [2024-06-04 16:03:09,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12048 conditions, 2012 events. 1206/2012 cut-off events. For 48934/48974 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10827 event pairs, 190 based on Foata normal form. 20/1979 useless extension candidates. Maximal degree in co-relation 11989. Up to 1456 conditions per place. [2024-06-04 16:03:09,858 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 118 selfloop transitions, 42 changer transitions 0/192 dead transitions. [2024-06-04 16:03:09,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 192 transitions, 1943 flow [2024-06-04 16:03:09,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:09,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-06-04 16:03:09,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6462585034013606 [2024-06-04 16:03:09,861 INFO L175 Difference]: Start difference. First operand has 129 places, 149 transitions, 1319 flow. Second operand 7 states and 190 transitions. [2024-06-04 16:03:09,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 192 transitions, 1943 flow [2024-06-04 16:03:09,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 192 transitions, 1854 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:09,901 INFO L231 Difference]: Finished difference. Result has 132 places, 156 transitions, 1433 flow [2024-06-04 16:03:09,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1433, PETRI_PLACES=132, PETRI_TRANSITIONS=156} [2024-06-04 16:03:09,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-04 16:03:09,902 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 156 transitions, 1433 flow [2024-06-04 16:03:09,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:09,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:09,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:09,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-04 16:03:09,903 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:09,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:09,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1794184545, now seen corresponding path program 2 times [2024-06-04 16:03:09,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:09,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50569425] [2024-06-04 16:03:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:09,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:09,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:10,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:10,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50569425] [2024-06-04 16:03:10,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50569425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:10,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:10,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:10,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098176556] [2024-06-04 16:03:10,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:10,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:10,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:10,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:10,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:10,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:03:10,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 156 transitions, 1433 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:10,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:10,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:03:10,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:10,497 INFO L124 PetriNetUnfolderBase]: 1171/1959 cut-off events. [2024-06-04 16:03:10,497 INFO L125 PetriNetUnfolderBase]: For 48841/48880 co-relation queries the response was YES. [2024-06-04 16:03:10,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11917 conditions, 1959 events. 1171/1959 cut-off events. For 48841/48880 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 10599 event pairs, 267 based on Foata normal form. 18/1923 useless extension candidates. Maximal degree in co-relation 11856. Up to 1588 conditions per place. [2024-06-04 16:03:10,511 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 115 selfloop transitions, 36 changer transitions 0/183 dead transitions. [2024-06-04 16:03:10,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 183 transitions, 1834 flow [2024-06-04 16:03:10,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-04 16:03:10,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-04 16:03:10,512 INFO L175 Difference]: Start difference. First operand has 132 places, 156 transitions, 1433 flow. Second operand 6 states and 161 transitions. [2024-06-04 16:03:10,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 183 transitions, 1834 flow [2024-06-04 16:03:10,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 183 transitions, 1782 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:10,554 INFO L231 Difference]: Finished difference. Result has 135 places, 157 transitions, 1483 flow [2024-06-04 16:03:10,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1381, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1483, PETRI_PLACES=135, PETRI_TRANSITIONS=157} [2024-06-04 16:03:10,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-04 16:03:10,555 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 157 transitions, 1483 flow [2024-06-04 16:03:10,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:10,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:10,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:10,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-04 16:03:10,556 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:10,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:10,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2075114849, now seen corresponding path program 3 times [2024-06-04 16:03:10,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:10,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204060137] [2024-06-04 16:03:10,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:10,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:10,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:10,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204060137] [2024-06-04 16:03:10,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204060137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:10,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:10,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:10,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947192349] [2024-06-04 16:03:10,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:10,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:10,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:10,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:10,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:10,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:03:10,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 157 transitions, 1483 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:10,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:10,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:03:10,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:11,282 INFO L124 PetriNetUnfolderBase]: 1218/2034 cut-off events. [2024-06-04 16:03:11,282 INFO L125 PetriNetUnfolderBase]: For 52579/52612 co-relation queries the response was YES. [2024-06-04 16:03:11,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12523 conditions, 2034 events. 1218/2034 cut-off events. For 52579/52612 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11033 event pairs, 273 based on Foata normal form. 14/1988 useless extension candidates. Maximal degree in co-relation 12460. Up to 1584 conditions per place. [2024-06-04 16:03:11,298 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 108 selfloop transitions, 63 changer transitions 0/203 dead transitions. [2024-06-04 16:03:11,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 203 transitions, 2085 flow [2024-06-04 16:03:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-04 16:03:11,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-04 16:03:11,308 INFO L175 Difference]: Start difference. First operand has 135 places, 157 transitions, 1483 flow. Second operand 10 states and 254 transitions. [2024-06-04 16:03:11,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 203 transitions, 2085 flow [2024-06-04 16:03:11,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 203 transitions, 2010 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:11,349 INFO L231 Difference]: Finished difference. Result has 141 places, 159 transitions, 1577 flow [2024-06-04 16:03:11,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1408, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1577, PETRI_PLACES=141, PETRI_TRANSITIONS=159} [2024-06-04 16:03:11,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-04 16:03:11,349 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 159 transitions, 1577 flow [2024-06-04 16:03:11,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:11,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:11,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:11,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-04 16:03:11,350 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:11,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:11,350 INFO L85 PathProgramCache]: Analyzing trace with hash -44186931, now seen corresponding path program 4 times [2024-06-04 16:03:11,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:11,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460943850] [2024-06-04 16:03:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:11,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:11,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:11,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:11,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460943850] [2024-06-04 16:03:11,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460943850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:11,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:11,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:03:11,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018157344] [2024-06-04 16:03:11,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:11,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:03:11,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:11,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:03:11,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:03:11,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:03:11,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 159 transitions, 1577 flow. Second operand has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:11,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:11,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:03:11,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:12,014 INFO L124 PetriNetUnfolderBase]: 1244/2075 cut-off events. [2024-06-04 16:03:12,014 INFO L125 PetriNetUnfolderBase]: For 54946/54979 co-relation queries the response was YES. [2024-06-04 16:03:12,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12926 conditions, 2075 events. 1244/2075 cut-off events. For 54946/54979 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11329 event pairs, 276 based on Foata normal form. 14/2030 useless extension candidates. Maximal degree in co-relation 12862. Up to 1617 conditions per place. [2024-06-04 16:03:12,030 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 110 selfloop transitions, 59 changer transitions 0/201 dead transitions. [2024-06-04 16:03:12,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 201 transitions, 2173 flow [2024-06-04 16:03:12,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:12,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-04 16:03:12,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6058201058201058 [2024-06-04 16:03:12,031 INFO L175 Difference]: Start difference. First operand has 141 places, 159 transitions, 1577 flow. Second operand 9 states and 229 transitions. [2024-06-04 16:03:12,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 201 transitions, 2173 flow [2024-06-04 16:03:12,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 201 transitions, 2038 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:12,099 INFO L231 Difference]: Finished difference. Result has 142 places, 161 transitions, 1607 flow [2024-06-04 16:03:12,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1607, PETRI_PLACES=142, PETRI_TRANSITIONS=161} [2024-06-04 16:03:12,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-04 16:03:12,100 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 161 transitions, 1607 flow [2024-06-04 16:03:12,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.625) internal successors, (133), 8 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:12,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:12,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:12,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-04 16:03:12,100 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)] === [2024-06-04 16:03:12,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:12,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1233437084, now seen corresponding path program 1 times [2024-06-04 16:03:12,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:12,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010599568] [2024-06-04 16:03:12,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:12,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:12,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:12,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:12,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:12,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010599568] [2024-06-04 16:03:12,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010599568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:12,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:12,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:03:12,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797269467] [2024-06-04 16:03:12,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:12,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:03:12,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:12,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:03:12,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:03:12,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:12,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 161 transitions, 1607 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:03:12,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:12,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:12,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:12,613 INFO L124 PetriNetUnfolderBase]: 1311/2184 cut-off events. [2024-06-04 16:03:12,613 INFO L125 PetriNetUnfolderBase]: For 49019/49019 co-relation queries the response was YES. [2024-06-04 16:03:12,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13343 conditions, 2184 events. 1311/2184 cut-off events. For 49019/49019 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11807 event pairs, 305 based on Foata normal form. 1/2182 useless extension candidates. Maximal degree in co-relation 13278. Up to 1964 conditions per place. [2024-06-04 16:03:12,631 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 157 selfloop transitions, 20 changer transitions 0/184 dead transitions. [2024-06-04 16:03:12,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 184 transitions, 2151 flow [2024-06-04 16:03:12,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:12,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 16:03:12,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:03:12,632 INFO L175 Difference]: Start difference. First operand has 142 places, 161 transitions, 1607 flow. Second operand 6 states and 142 transitions. [2024-06-04 16:03:12,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 184 transitions, 2151 flow [2024-06-04 16:03:12,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 184 transitions, 2020 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:03:12,708 INFO L231 Difference]: Finished difference. Result has 141 places, 167 transitions, 1620 flow [2024-06-04 16:03:12,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1620, PETRI_PLACES=141, PETRI_TRANSITIONS=167} [2024-06-04 16:03:12,709 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-04 16:03:12,709 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 167 transitions, 1620 flow [2024-06-04 16:03:12,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:03:12,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:12,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:12,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-04 16:03:12,710 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)] === [2024-06-04 16:03:12,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:12,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432434, now seen corresponding path program 2 times [2024-06-04 16:03:12,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:12,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054853446] [2024-06-04 16:03:12,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:12,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:12,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:12,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054853446] [2024-06-04 16:03:12,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054853446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:12,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:12,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:03:12,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922792406] [2024-06-04 16:03:12,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:12,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:03:12,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:12,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:03:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:03:12,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:12,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 167 transitions, 1620 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:03:12,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:12,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:12,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:13,242 INFO L124 PetriNetUnfolderBase]: 1321/2200 cut-off events. [2024-06-04 16:03:13,242 INFO L125 PetriNetUnfolderBase]: For 51413/51413 co-relation queries the response was YES. [2024-06-04 16:03:13,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13382 conditions, 2200 events. 1321/2200 cut-off events. For 51413/51413 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 11913 event pairs, 305 based on Foata normal form. 1/2198 useless extension candidates. Maximal degree in co-relation 13316. Up to 1990 conditions per place. [2024-06-04 16:03:13,259 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 161 selfloop transitions, 18 changer transitions 0/186 dead transitions. [2024-06-04 16:03:13,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 186 transitions, 2094 flow [2024-06-04 16:03:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:13,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:13,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-04 16:03:13,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5436507936507936 [2024-06-04 16:03:13,261 INFO L175 Difference]: Start difference. First operand has 141 places, 167 transitions, 1620 flow. Second operand 6 states and 137 transitions. [2024-06-04 16:03:13,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 186 transitions, 2094 flow [2024-06-04 16:03:13,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 186 transitions, 2018 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-04 16:03:13,331 INFO L231 Difference]: Finished difference. Result has 145 places, 173 transitions, 1676 flow [2024-06-04 16:03:13,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1557, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1676, PETRI_PLACES=145, PETRI_TRANSITIONS=173} [2024-06-04 16:03:13,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-04 16:03:13,331 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 173 transitions, 1676 flow [2024-06-04 16:03:13,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:03:13,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:13,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:13,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-04 16:03:13,332 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:13,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:13,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432248, now seen corresponding path program 1 times [2024-06-04 16:03:13,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:13,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633362917] [2024-06-04 16:03:13,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:13,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:13,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:13,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:13,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633362917] [2024-06-04 16:03:13,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633362917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:13,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:13,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:03:13,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065311247] [2024-06-04 16:03:13,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:13,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:03:13,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:13,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:03:13,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:03:13,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:13,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 173 transitions, 1676 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:03:13,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:13,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:13,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:13,868 INFO L124 PetriNetUnfolderBase]: 1346/2234 cut-off events. [2024-06-04 16:03:13,869 INFO L125 PetriNetUnfolderBase]: For 54784/54784 co-relation queries the response was YES. [2024-06-04 16:03:13,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13660 conditions, 2234 events. 1346/2234 cut-off events. For 54784/54784 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12093 event pairs, 314 based on Foata normal form. 2/2230 useless extension candidates. Maximal degree in co-relation 13592. Up to 1935 conditions per place. [2024-06-04 16:03:13,887 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 149 selfloop transitions, 42 changer transitions 0/198 dead transitions. [2024-06-04 16:03:13,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 198 transitions, 2248 flow [2024-06-04 16:03:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:03:13,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-04 16:03:13,888 INFO L175 Difference]: Start difference. First operand has 145 places, 173 transitions, 1676 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:03:13,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 198 transitions, 2248 flow [2024-06-04 16:03:13,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 198 transitions, 2184 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:13,954 INFO L231 Difference]: Finished difference. Result has 149 places, 184 transitions, 1820 flow [2024-06-04 16:03:13,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1612, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1820, PETRI_PLACES=149, PETRI_TRANSITIONS=184} [2024-06-04 16:03:13,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-04 16:03:13,955 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 184 transitions, 1820 flow [2024-06-04 16:03:13,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:03:13,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:13,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:13,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-04 16:03:13,956 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:13,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:13,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1739189820, now seen corresponding path program 2 times [2024-06-04 16:03:13,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:13,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30703225] [2024-06-04 16:03:13,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:13,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:14,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:14,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:14,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30703225] [2024-06-04 16:03:14,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30703225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:14,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:14,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:03:14,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668980031] [2024-06-04 16:03:14,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:14,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:03:14,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:14,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:03:14,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:03:14,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:14,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 184 transitions, 1820 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:03:14,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:14,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:14,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:14,445 INFO L124 PetriNetUnfolderBase]: 1356/2253 cut-off events. [2024-06-04 16:03:14,445 INFO L125 PetriNetUnfolderBase]: For 58321/58324 co-relation queries the response was YES. [2024-06-04 16:03:14,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13957 conditions, 2253 events. 1356/2253 cut-off events. For 58321/58324 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12276 event pairs, 333 based on Foata normal form. 4/2249 useless extension candidates. Maximal degree in co-relation 13887. Up to 1945 conditions per place. [2024-06-04 16:03:14,494 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 46 changer transitions 0/198 dead transitions. [2024-06-04 16:03:14,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 198 transitions, 2333 flow [2024-06-04 16:03:14,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:03:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:03:14,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-04 16:03:14,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-04 16:03:14,495 INFO L175 Difference]: Start difference. First operand has 149 places, 184 transitions, 1820 flow. Second operand 5 states and 122 transitions. [2024-06-04 16:03:14,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 198 transitions, 2333 flow [2024-06-04 16:03:14,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 198 transitions, 2273 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-04 16:03:14,548 INFO L231 Difference]: Finished difference. Result has 152 places, 188 transitions, 1904 flow [2024-06-04 16:03:14,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1904, PETRI_PLACES=152, PETRI_TRANSITIONS=188} [2024-06-04 16:03:14,549 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-04 16:03:14,549 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 188 transitions, 1904 flow [2024-06-04 16:03:14,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:03:14,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:14,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:14,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-04 16:03:14,549 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:14,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:14,550 INFO L85 PathProgramCache]: Analyzing trace with hash -535840404, now seen corresponding path program 3 times [2024-06-04 16:03:14,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:14,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805422888] [2024-06-04 16:03:14,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:14,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:14,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:14,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:14,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805422888] [2024-06-04 16:03:14,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805422888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:14,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:14,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:03:14,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493234895] [2024-06-04 16:03:14,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:14,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:03:14,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:14,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:03:14,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:03:14,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:14,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 188 transitions, 1904 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:03:14,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:14,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:14,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:15,098 INFO L124 PetriNetUnfolderBase]: 1353/2253 cut-off events. [2024-06-04 16:03:15,099 INFO L125 PetriNetUnfolderBase]: For 59906/59906 co-relation queries the response was YES. [2024-06-04 16:03:15,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14017 conditions, 2253 events. 1353/2253 cut-off events. For 59906/59906 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12249 event pairs, 303 based on Foata normal form. 1/2251 useless extension candidates. Maximal degree in co-relation 13946. Up to 2023 conditions per place. [2024-06-04 16:03:15,118 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 173 selfloop transitions, 23 changer transitions 0/203 dead transitions. [2024-06-04 16:03:15,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 203 transitions, 2334 flow [2024-06-04 16:03:15,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:03:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:03:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-06-04 16:03:15,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-04 16:03:15,120 INFO L175 Difference]: Start difference. First operand has 152 places, 188 transitions, 1904 flow. Second operand 5 states and 123 transitions. [2024-06-04 16:03:15,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 203 transitions, 2334 flow [2024-06-04 16:03:15,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 203 transitions, 2206 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:15,186 INFO L231 Difference]: Finished difference. Result has 154 places, 188 transitions, 1836 flow [2024-06-04 16:03:15,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1836, PETRI_PLACES=154, PETRI_TRANSITIONS=188} [2024-06-04 16:03:15,187 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-04 16:03:15,187 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 188 transitions, 1836 flow [2024-06-04 16:03:15,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:03:15,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:15,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:15,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-04 16:03:15,187 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:15,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:15,188 INFO L85 PathProgramCache]: Analyzing trace with hash -535840218, now seen corresponding path program 3 times [2024-06-04 16:03:15,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:15,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544038475] [2024-06-04 16:03:15,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:15,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:15,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:15,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544038475] [2024-06-04 16:03:15,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544038475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:15,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:15,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:03:15,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2515226] [2024-06-04 16:03:15,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:15,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:03:15,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:15,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:03:15,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:03:15,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:15,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 188 transitions, 1836 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:03:15,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:15,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:15,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:15,705 INFO L124 PetriNetUnfolderBase]: 1333/2214 cut-off events. [2024-06-04 16:03:15,705 INFO L125 PetriNetUnfolderBase]: For 61839/61839 co-relation queries the response was YES. [2024-06-04 16:03:15,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13796 conditions, 2214 events. 1333/2214 cut-off events. For 61839/61839 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12013 event pairs, 312 based on Foata normal form. 2/2210 useless extension candidates. Maximal degree in co-relation 13725. Up to 1912 conditions per place. [2024-06-04 16:03:15,724 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 147 selfloop transitions, 46 changer transitions 0/200 dead transitions. [2024-06-04 16:03:15,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 200 transitions, 2252 flow [2024-06-04 16:03:15,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:03:15,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:03:15,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-04 16:03:15,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5904761904761905 [2024-06-04 16:03:15,725 INFO L175 Difference]: Start difference. First operand has 154 places, 188 transitions, 1836 flow. Second operand 5 states and 124 transitions. [2024-06-04 16:03:15,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 200 transitions, 2252 flow [2024-06-04 16:03:15,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 200 transitions, 2196 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:15,789 INFO L231 Difference]: Finished difference. Result has 155 places, 188 transitions, 1888 flow [2024-06-04 16:03:15,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1780, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1888, PETRI_PLACES=155, PETRI_TRANSITIONS=188} [2024-06-04 16:03:15,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-04 16:03:15,790 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 188 transitions, 1888 flow [2024-06-04 16:03:15,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 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) [2024-06-04 16:03:15,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:15,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:15,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-04 16:03:15,790 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:15,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:15,790 INFO L85 PathProgramCache]: Analyzing trace with hash -535594140, now seen corresponding path program 1 times [2024-06-04 16:03:15,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:15,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303489391] [2024-06-04 16:03:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:15,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:15,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:16,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:16,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:16,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303489391] [2024-06-04 16:03:16,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303489391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:16,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:16,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:03:16,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662666907] [2024-06-04 16:03:16,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:16,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:03:16,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:16,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:03:16,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:03:16,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:03:16,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 188 transitions, 1888 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:16,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:16,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:03:16,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:16,320 INFO L124 PetriNetUnfolderBase]: 1298/2178 cut-off events. [2024-06-04 16:03:16,320 INFO L125 PetriNetUnfolderBase]: For 65944/65958 co-relation queries the response was YES. [2024-06-04 16:03:16,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13615 conditions, 2178 events. 1298/2178 cut-off events. For 65944/65958 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12030 event pairs, 315 based on Foata normal form. 24/2187 useless extension candidates. Maximal degree in co-relation 13543. Up to 1793 conditions per place. [2024-06-04 16:03:16,339 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 151 selfloop transitions, 22 changer transitions 0/203 dead transitions. [2024-06-04 16:03:16,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 203 transitions, 2308 flow [2024-06-04 16:03:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:03:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:03:16,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-04 16:03:16,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:03:16,341 INFO L175 Difference]: Start difference. First operand has 155 places, 188 transitions, 1888 flow. Second operand 5 states and 125 transitions. [2024-06-04 16:03:16,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 203 transitions, 2308 flow [2024-06-04 16:03:16,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 203 transitions, 2196 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:16,425 INFO L231 Difference]: Finished difference. Result has 156 places, 190 transitions, 1857 flow [2024-06-04 16:03:16,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1857, PETRI_PLACES=156, PETRI_TRANSITIONS=190} [2024-06-04 16:03:16,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-04 16:03:16,426 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 190 transitions, 1857 flow [2024-06-04 16:03:16,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:16,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:16,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:16,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-04 16:03:16,426 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)] === [2024-06-04 16:03:16,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:16,427 INFO L85 PathProgramCache]: Analyzing trace with hash 280889040, now seen corresponding path program 1 times [2024-06-04 16:03:16,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:16,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14835306] [2024-06-04 16:03:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:16,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:16,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:16,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14835306] [2024-06-04 16:03:16,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14835306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:16,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:16,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:16,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905653373] [2024-06-04 16:03:16,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:16,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:16,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:16,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:16,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:16,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:16,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 190 transitions, 1857 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:16,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:16,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:16,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:17,142 INFO L124 PetriNetUnfolderBase]: 1491/2485 cut-off events. [2024-06-04 16:03:17,142 INFO L125 PetriNetUnfolderBase]: For 73594/73594 co-relation queries the response was YES. [2024-06-04 16:03:17,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15462 conditions, 2485 events. 1491/2485 cut-off events. For 73594/73594 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 13831 event pairs, 242 based on Foata normal form. 12/2494 useless extension candidates. Maximal degree in co-relation 15389. Up to 1924 conditions per place. [2024-06-04 16:03:17,163 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 26 changer transitions 0/236 dead transitions. [2024-06-04 16:03:17,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 236 transitions, 2643 flow [2024-06-04 16:03:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-04 16:03:17,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-04 16:03:17,165 INFO L175 Difference]: Start difference. First operand has 156 places, 190 transitions, 1857 flow. Second operand 8 states and 198 transitions. [2024-06-04 16:03:17,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 236 transitions, 2643 flow [2024-06-04 16:03:17,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 236 transitions, 2584 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:17,269 INFO L231 Difference]: Finished difference. Result has 163 places, 195 transitions, 1943 flow [2024-06-04 16:03:17,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1798, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1943, PETRI_PLACES=163, PETRI_TRANSITIONS=195} [2024-06-04 16:03:17,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-04 16:03:17,270 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 195 transitions, 1943 flow [2024-06-04 16:03:17,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:17,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:17,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:17,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-04 16:03:17,270 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)] === [2024-06-04 16:03:17,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:17,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1434594660, now seen corresponding path program 2 times [2024-06-04 16:03:17,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:17,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647925599] [2024-06-04 16:03:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:17,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:17,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:17,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:17,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:17,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647925599] [2024-06-04 16:03:17,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647925599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:17,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:17,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:17,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724893706] [2024-06-04 16:03:17,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:17,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:17,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:17,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:17,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:17,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:17,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 195 transitions, 1943 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:17,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:17,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:17,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:17,955 INFO L124 PetriNetUnfolderBase]: 1532/2554 cut-off events. [2024-06-04 16:03:17,955 INFO L125 PetriNetUnfolderBase]: For 78234/78234 co-relation queries the response was YES. [2024-06-04 16:03:17,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16025 conditions, 2554 events. 1532/2554 cut-off events. For 78234/78234 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 14322 event pairs, 323 based on Foata normal form. 12/2563 useless extension candidates. Maximal degree in co-relation 15949. Up to 2058 conditions per place. [2024-06-04 16:03:17,976 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 202 selfloop transitions, 24 changer transitions 0/233 dead transitions. [2024-06-04 16:03:17,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 233 transitions, 2684 flow [2024-06-04 16:03:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:17,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:17,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:03:17,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 16:03:17,977 INFO L175 Difference]: Start difference. First operand has 163 places, 195 transitions, 1943 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:03:17,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 233 transitions, 2684 flow [2024-06-04 16:03:18,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 233 transitions, 2632 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:18,138 INFO L231 Difference]: Finished difference. Result has 168 places, 198 transitions, 2008 flow [2024-06-04 16:03:18,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1891, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2008, PETRI_PLACES=168, PETRI_TRANSITIONS=198} [2024-06-04 16:03:18,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-04 16:03:18,139 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 198 transitions, 2008 flow [2024-06-04 16:03:18,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:18,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:18,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:18,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-04 16:03:18,140 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)] === [2024-06-04 16:03:18,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash -214705298, now seen corresponding path program 3 times [2024-06-04 16:03:18,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:18,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763209487] [2024-06-04 16:03:18,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:18,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:18,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:18,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763209487] [2024-06-04 16:03:18,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763209487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:18,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:18,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:18,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759187812] [2024-06-04 16:03:18,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:18,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:18,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:18,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:18,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:18,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:18,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 198 transitions, 2008 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:18,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:18,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:18,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:18,830 INFO L124 PetriNetUnfolderBase]: 1504/2510 cut-off events. [2024-06-04 16:03:18,830 INFO L125 PetriNetUnfolderBase]: For 77474/77474 co-relation queries the response was YES. [2024-06-04 16:03:18,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15511 conditions, 2510 events. 1504/2510 cut-off events. For 77474/77474 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13974 event pairs, 324 based on Foata normal form. 16/2523 useless extension candidates. Maximal degree in co-relation 15432. Up to 2137 conditions per place. [2024-06-04 16:03:18,853 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 24 changer transitions 0/229 dead transitions. [2024-06-04 16:03:18,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 229 transitions, 2568 flow [2024-06-04 16:03:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:18,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:18,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-04 16:03:18,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-04 16:03:18,854 INFO L175 Difference]: Start difference. First operand has 168 places, 198 transitions, 2008 flow. Second operand 7 states and 172 transitions. [2024-06-04 16:03:18,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 229 transitions, 2568 flow [2024-06-04 16:03:18,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 229 transitions, 2500 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:18,973 INFO L231 Difference]: Finished difference. Result has 172 places, 199 transitions, 2022 flow [2024-06-04 16:03:18,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2022, PETRI_PLACES=172, PETRI_TRANSITIONS=199} [2024-06-04 16:03:18,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-04 16:03:18,974 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 199 transitions, 2022 flow [2024-06-04 16:03:18,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:18,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:18,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:18,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-04 16:03:18,975 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:18,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:18,975 INFO L85 PathProgramCache]: Analyzing trace with hash -935646324, now seen corresponding path program 4 times [2024-06-04 16:03:18,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:18,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976348208] [2024-06-04 16:03:18,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:18,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:18,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:19,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:19,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976348208] [2024-06-04 16:03:19,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976348208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:19,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:19,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:19,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209924345] [2024-06-04 16:03:19,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:19,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:19,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:19,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:19,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:19,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:19,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 199 transitions, 2022 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:19,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:19,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:19,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:19,692 INFO L124 PetriNetUnfolderBase]: 1562/2608 cut-off events. [2024-06-04 16:03:19,693 INFO L125 PetriNetUnfolderBase]: For 81182/81185 co-relation queries the response was YES. [2024-06-04 16:03:19,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15988 conditions, 2608 events. 1562/2608 cut-off events. For 81182/81185 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 14774 event pairs, 346 based on Foata normal form. 16/2619 useless extension candidates. Maximal degree in co-relation 15907. Up to 2145 conditions per place. [2024-06-04 16:03:19,719 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 53 changer transitions 0/245 dead transitions. [2024-06-04 16:03:19,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 245 transitions, 2648 flow [2024-06-04 16:03:19,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:19,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:19,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 243 transitions. [2024-06-04 16:03:19,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-04 16:03:19,720 INFO L175 Difference]: Start difference. First operand has 172 places, 199 transitions, 2022 flow. Second operand 10 states and 243 transitions. [2024-06-04 16:03:19,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 245 transitions, 2648 flow [2024-06-04 16:03:19,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 245 transitions, 2600 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:19,855 INFO L231 Difference]: Finished difference. Result has 177 places, 200 transitions, 2107 flow [2024-06-04 16:03:19,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2107, PETRI_PLACES=177, PETRI_TRANSITIONS=200} [2024-06-04 16:03:19,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-04 16:03:19,856 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 200 transitions, 2107 flow [2024-06-04 16:03:19,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:19,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:19,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:19,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-04 16:03:19,857 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:19,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:19,857 INFO L85 PathProgramCache]: Analyzing trace with hash 539326616, now seen corresponding path program 5 times [2024-06-04 16:03:19,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:19,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128763742] [2024-06-04 16:03:19,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:19,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:20,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:20,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128763742] [2024-06-04 16:03:20,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128763742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:20,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:20,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:20,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676964506] [2024-06-04 16:03:20,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:20,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:20,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:20,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:20,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:20,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:20,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 200 transitions, 2107 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:20,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:20,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:20,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:20,621 INFO L124 PetriNetUnfolderBase]: 1620/2726 cut-off events. [2024-06-04 16:03:20,621 INFO L125 PetriNetUnfolderBase]: For 86279/86282 co-relation queries the response was YES. [2024-06-04 16:03:20,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16724 conditions, 2726 events. 1620/2726 cut-off events. For 86279/86282 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 15722 event pairs, 366 based on Foata normal form. 16/2737 useless extension candidates. Maximal degree in co-relation 16642. Up to 2243 conditions per place. [2024-06-04 16:03:20,645 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 55 changer transitions 0/250 dead transitions. [2024-06-04 16:03:20,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 250 transitions, 2755 flow [2024-06-04 16:03:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:20,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-04 16:03:20,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-04 16:03:20,647 INFO L175 Difference]: Start difference. First operand has 177 places, 200 transitions, 2107 flow. Second operand 11 states and 261 transitions. [2024-06-04 16:03:20,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 250 transitions, 2755 flow [2024-06-04 16:03:20,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 250 transitions, 2640 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:20,834 INFO L231 Difference]: Finished difference. Result has 180 places, 201 transitions, 2131 flow [2024-06-04 16:03:20,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2131, PETRI_PLACES=180, PETRI_TRANSITIONS=201} [2024-06-04 16:03:20,835 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-04 16:03:20,835 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 201 transitions, 2131 flow [2024-06-04 16:03:20,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:20,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:20,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:20,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-04 16:03:20,836 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:20,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:20,837 INFO L85 PathProgramCache]: Analyzing trace with hash -95948336, now seen corresponding path program 6 times [2024-06-04 16:03:20,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:20,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451341785] [2024-06-04 16:03:20,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:20,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:20,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:21,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:21,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451341785] [2024-06-04 16:03:21,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451341785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:21,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:21,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:21,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171030313] [2024-06-04 16:03:21,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:21,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:21,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:21,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:21,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:21,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:21,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 201 transitions, 2131 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:21,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:21,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:21,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:21,627 INFO L124 PetriNetUnfolderBase]: 1661/2797 cut-off events. [2024-06-04 16:03:21,627 INFO L125 PetriNetUnfolderBase]: For 88324/88327 co-relation queries the response was YES. [2024-06-04 16:03:21,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17121 conditions, 2797 events. 1661/2797 cut-off events. For 88324/88327 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16283 event pairs, 359 based on Foata normal form. 12/2804 useless extension candidates. Maximal degree in co-relation 17038. Up to 2135 conditions per place. [2024-06-04 16:03:21,651 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 56 changer transitions 0/252 dead transitions. [2024-06-04 16:03:21,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 252 transitions, 2823 flow [2024-06-04 16:03:21,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:21,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:21,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-04 16:03:21,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:03:21,653 INFO L175 Difference]: Start difference. First operand has 180 places, 201 transitions, 2131 flow. Second operand 10 states and 245 transitions. [2024-06-04 16:03:21,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 252 transitions, 2823 flow [2024-06-04 16:03:21,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 252 transitions, 2702 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:21,815 INFO L231 Difference]: Finished difference. Result has 182 places, 204 transitions, 2195 flow [2024-06-04 16:03:21,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2195, PETRI_PLACES=182, PETRI_TRANSITIONS=204} [2024-06-04 16:03:21,816 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-04 16:03:21,816 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 204 transitions, 2195 flow [2024-06-04 16:03:21,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:21,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:21,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:21,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-04 16:03:21,817 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:21,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:21,817 INFO L85 PathProgramCache]: Analyzing trace with hash 111125836, now seen corresponding path program 1 times [2024-06-04 16:03:21,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:21,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070489066] [2024-06-04 16:03:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:21,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:22,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:22,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070489066] [2024-06-04 16:03:22,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070489066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:22,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:22,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:22,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643865897] [2024-06-04 16:03:22,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:22,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:22,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:22,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:22,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:22,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:22,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 204 transitions, 2195 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:22,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:22,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:22,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:22,661 INFO L124 PetriNetUnfolderBase]: 1702/2868 cut-off events. [2024-06-04 16:03:22,661 INFO L125 PetriNetUnfolderBase]: For 93666/93669 co-relation queries the response was YES. [2024-06-04 16:03:22,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17590 conditions, 2868 events. 1702/2868 cut-off events. For 93666/93669 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 16885 event pairs, 367 based on Foata normal form. 12/2875 useless extension candidates. Maximal degree in co-relation 17505. Up to 2114 conditions per place. [2024-06-04 16:03:22,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 60 changer transitions 0/257 dead transitions. [2024-06-04 16:03:22,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 257 transitions, 2877 flow [2024-06-04 16:03:22,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:22,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:22,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 263 transitions. [2024-06-04 16:03:22,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5692640692640693 [2024-06-04 16:03:22,688 INFO L175 Difference]: Start difference. First operand has 182 places, 204 transitions, 2195 flow. Second operand 11 states and 263 transitions. [2024-06-04 16:03:22,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 257 transitions, 2877 flow [2024-06-04 16:03:22,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 257 transitions, 2785 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:22,860 INFO L231 Difference]: Finished difference. Result has 187 places, 205 transitions, 2255 flow [2024-06-04 16:03:22,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2103, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2255, PETRI_PLACES=187, PETRI_TRANSITIONS=205} [2024-06-04 16:03:22,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-04 16:03:22,860 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 205 transitions, 2255 flow [2024-06-04 16:03:22,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:22,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:22,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:22,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-04 16:03:22,861 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:22,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:22,861 INFO L85 PathProgramCache]: Analyzing trace with hash -592122344, now seen corresponding path program 7 times [2024-06-04 16:03:22,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:22,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363715879] [2024-06-04 16:03:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:22,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:23,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:23,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363715879] [2024-06-04 16:03:23,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363715879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:23,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:23,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:23,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931825182] [2024-06-04 16:03:23,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:23,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:23,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:23,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:23,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:23,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:23,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 205 transitions, 2255 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:23,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:23,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:23,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:23,589 INFO L124 PetriNetUnfolderBase]: 1760/2971 cut-off events. [2024-06-04 16:03:23,589 INFO L125 PetriNetUnfolderBase]: For 101630/101630 co-relation queries the response was YES. [2024-06-04 16:03:23,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18341 conditions, 2971 events. 1760/2971 cut-off events. For 101630/101630 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 17734 event pairs, 400 based on Foata normal form. 16/2981 useless extension candidates. Maximal degree in co-relation 18254. Up to 2483 conditions per place. [2024-06-04 16:03:23,617 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 195 selfloop transitions, 54 changer transitions 0/256 dead transitions. [2024-06-04 16:03:23,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 256 transitions, 2923 flow [2024-06-04 16:03:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 279 transitions. [2024-06-04 16:03:23,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 16:03:23,619 INFO L175 Difference]: Start difference. First operand has 187 places, 205 transitions, 2255 flow. Second operand 12 states and 279 transitions. [2024-06-04 16:03:23,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 256 transitions, 2923 flow [2024-06-04 16:03:23,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 256 transitions, 2785 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:23,802 INFO L231 Difference]: Finished difference. Result has 190 places, 206 transitions, 2260 flow [2024-06-04 16:03:23,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2117, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2260, PETRI_PLACES=190, PETRI_TRANSITIONS=206} [2024-06-04 16:03:23,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-04 16:03:23,803 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 206 transitions, 2260 flow [2024-06-04 16:03:23,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:23,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:23,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:23,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-04 16:03:23,804 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:23,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:23,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1823964014, now seen corresponding path program 8 times [2024-06-04 16:03:23,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:23,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189048021] [2024-06-04 16:03:23,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:23,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:24,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:24,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189048021] [2024-06-04 16:03:24,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189048021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:24,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:24,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:24,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870458447] [2024-06-04 16:03:24,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:24,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:24,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:24,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:24,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:24,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:24,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 206 transitions, 2260 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:24,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:24,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:24,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:24,550 INFO L124 PetriNetUnfolderBase]: 1818/3069 cut-off events. [2024-06-04 16:03:24,550 INFO L125 PetriNetUnfolderBase]: For 107096/107096 co-relation queries the response was YES. [2024-06-04 16:03:24,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18830 conditions, 3069 events. 1818/3069 cut-off events. For 107096/107096 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 18442 event pairs, 410 based on Foata normal form. 16/3079 useless extension candidates. Maximal degree in co-relation 18742. Up to 2581 conditions per place. [2024-06-04 16:03:24,578 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 53 changer transitions 0/249 dead transitions. [2024-06-04 16:03:24,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 249 transitions, 2896 flow [2024-06-04 16:03:24,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-04 16:03:24,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5642857142857143 [2024-06-04 16:03:24,583 INFO L175 Difference]: Start difference. First operand has 190 places, 206 transitions, 2260 flow. Second operand 10 states and 237 transitions. [2024-06-04 16:03:24,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 249 transitions, 2896 flow [2024-06-04 16:03:24,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 249 transitions, 2771 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:24,779 INFO L231 Difference]: Finished difference. Result has 190 places, 207 transitions, 2278 flow [2024-06-04 16:03:24,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2135, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2278, PETRI_PLACES=190, PETRI_TRANSITIONS=207} [2024-06-04 16:03:24,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-04 16:03:24,780 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 207 transitions, 2278 flow [2024-06-04 16:03:24,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:24,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:24,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:24,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-04 16:03:24,781 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:24,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:24,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1899437774, now seen corresponding path program 9 times [2024-06-04 16:03:24,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:24,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351090048] [2024-06-04 16:03:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:24,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:25,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:25,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351090048] [2024-06-04 16:03:25,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351090048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:25,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:25,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:25,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198656240] [2024-06-04 16:03:25,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:25,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:25,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:25,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:25,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:25,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:25,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 207 transitions, 2278 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:25,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:25,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:25,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:25,565 INFO L124 PetriNetUnfolderBase]: 1876/3177 cut-off events. [2024-06-04 16:03:25,565 INFO L125 PetriNetUnfolderBase]: For 112550/112550 co-relation queries the response was YES. [2024-06-04 16:03:25,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19366 conditions, 3177 events. 1876/3177 cut-off events. For 112550/112550 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 19310 event pairs, 425 based on Foata normal form. 16/3187 useless extension candidates. Maximal degree in co-relation 19277. Up to 2679 conditions per place. [2024-06-04 16:03:25,596 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 57 changer transitions 0/254 dead transitions. [2024-06-04 16:03:25,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 254 transitions, 2936 flow [2024-06-04 16:03:25,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:25,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:25,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-04 16:03:25,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-04 16:03:25,598 INFO L175 Difference]: Start difference. First operand has 190 places, 207 transitions, 2278 flow. Second operand 11 states and 255 transitions. [2024-06-04 16:03:25,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 254 transitions, 2936 flow [2024-06-04 16:03:25,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 254 transitions, 2811 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:25,846 INFO L231 Difference]: Finished difference. Result has 193 places, 208 transitions, 2306 flow [2024-06-04 16:03:25,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2306, PETRI_PLACES=193, PETRI_TRANSITIONS=208} [2024-06-04 16:03:25,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 150 predicate places. [2024-06-04 16:03:25,847 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 208 transitions, 2306 flow [2024-06-04 16:03:25,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:25,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:25,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:25,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-04 16:03:25,847 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:25,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:25,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1823816144, now seen corresponding path program 10 times [2024-06-04 16:03:25,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:25,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131793933] [2024-06-04 16:03:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:25,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:25,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:26,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:26,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:26,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131793933] [2024-06-04 16:03:26,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131793933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:26,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:26,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:26,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389217637] [2024-06-04 16:03:26,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:26,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:26,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:26,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:26,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:26,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:26,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 208 transitions, 2306 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:26,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:26,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:26,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:26,650 INFO L124 PetriNetUnfolderBase]: 1892/3209 cut-off events. [2024-06-04 16:03:26,650 INFO L125 PetriNetUnfolderBase]: For 110538/110538 co-relation queries the response was YES. [2024-06-04 16:03:26,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19347 conditions, 3209 events. 1892/3209 cut-off events. For 110538/110538 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 19565 event pairs, 416 based on Foata normal form. 12/3215 useless extension candidates. Maximal degree in co-relation 19257. Up to 2440 conditions per place. [2024-06-04 16:03:26,681 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 57 changer transitions 0/256 dead transitions. [2024-06-04 16:03:26,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 256 transitions, 3018 flow [2024-06-04 16:03:26,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:03:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:03:26,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-04 16:03:26,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-06-04 16:03:26,683 INFO L175 Difference]: Start difference. First operand has 193 places, 208 transitions, 2306 flow. Second operand 10 states and 239 transitions. [2024-06-04 16:03:26,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 256 transitions, 3018 flow [2024-06-04 16:03:26,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 256 transitions, 2883 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:26,862 INFO L231 Difference]: Finished difference. Result has 195 places, 211 transitions, 2381 flow [2024-06-04 16:03:26,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2171, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2381, PETRI_PLACES=195, PETRI_TRANSITIONS=211} [2024-06-04 16:03:26,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-04 16:03:26,863 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 211 transitions, 2381 flow [2024-06-04 16:03:26,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:26,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:26,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:26,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-04 16:03:26,863 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:26,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:26,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2030890316, now seen corresponding path program 2 times [2024-06-04 16:03:26,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:26,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164954957] [2024-06-04 16:03:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:26,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:26,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:27,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:27,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:27,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164954957] [2024-06-04 16:03:27,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164954957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:27,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:27,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:27,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313132575] [2024-06-04 16:03:27,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:27,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:27,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:27,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:27,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:27,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:27,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 211 transitions, 2381 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:27,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:27,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:27,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:27,723 INFO L124 PetriNetUnfolderBase]: 1933/3290 cut-off events. [2024-06-04 16:03:27,723 INFO L125 PetriNetUnfolderBase]: For 116027/116027 co-relation queries the response was YES. [2024-06-04 16:03:27,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19814 conditions, 3290 events. 1933/3290 cut-off events. For 116027/116027 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 20288 event pairs, 433 based on Foata normal form. 12/3296 useless extension candidates. Maximal degree in co-relation 19722. Up to 2603 conditions per place. [2024-06-04 16:03:27,755 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 200 selfloop transitions, 58 changer transitions 0/265 dead transitions. [2024-06-04 16:03:27,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 265 transitions, 3091 flow [2024-06-04 16:03:27,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:27,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:27,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 281 transitions. [2024-06-04 16:03:27,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5575396825396826 [2024-06-04 16:03:27,757 INFO L175 Difference]: Start difference. First operand has 195 places, 211 transitions, 2381 flow. Second operand 12 states and 281 transitions. [2024-06-04 16:03:27,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 265 transitions, 3091 flow [2024-06-04 16:03:27,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 265 transitions, 2981 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:27,973 INFO L231 Difference]: Finished difference. Result has 201 places, 212 transitions, 2429 flow [2024-06-04 16:03:27,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2271, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2429, PETRI_PLACES=201, PETRI_TRANSITIONS=212} [2024-06-04 16:03:27,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-04 16:03:27,974 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 212 transitions, 2429 flow [2024-06-04 16:03:27,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:27,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:27,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:27,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-04 16:03:27,974 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:27,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:27,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1936463428, now seen corresponding path program 3 times [2024-06-04 16:03:27,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:27,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962791494] [2024-06-04 16:03:27,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:27,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:28,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:28,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962791494] [2024-06-04 16:03:28,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962791494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:28,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:28,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:28,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651114600] [2024-06-04 16:03:28,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:28,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:28,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:28,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:28,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:28,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:28,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 212 transitions, 2429 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:28,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:28,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:28,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:28,793 INFO L124 PetriNetUnfolderBase]: 1974/3366 cut-off events. [2024-06-04 16:03:28,793 INFO L125 PetriNetUnfolderBase]: For 121382/121382 co-relation queries the response was YES. [2024-06-04 16:03:28,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20358 conditions, 3366 events. 1974/3366 cut-off events. For 121382/121382 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20895 event pairs, 448 based on Foata normal form. 12/3372 useless extension candidates. Maximal degree in co-relation 20264. Up to 2766 conditions per place. [2024-06-04 16:03:28,827 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 199 selfloop transitions, 60 changer transitions 0/266 dead transitions. [2024-06-04 16:03:28,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 266 transitions, 3143 flow [2024-06-04 16:03:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:03:28,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:03:28,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 278 transitions. [2024-06-04 16:03:28,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-04 16:03:28,829 INFO L175 Difference]: Start difference. First operand has 201 places, 212 transitions, 2429 flow. Second operand 12 states and 278 transitions. [2024-06-04 16:03:28,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 266 transitions, 3143 flow [2024-06-04 16:03:29,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 266 transitions, 2999 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:29,028 INFO L231 Difference]: Finished difference. Result has 203 places, 213 transitions, 2449 flow [2024-06-04 16:03:29,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2285, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2449, PETRI_PLACES=203, PETRI_TRANSITIONS=213} [2024-06-04 16:03:29,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-04 16:03:29,029 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 213 transitions, 2449 flow [2024-06-04 16:03:29,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:29,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:29,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:29,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-04 16:03:29,029 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:29,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:29,030 INFO L85 PathProgramCache]: Analyzing trace with hash -18362134, now seen corresponding path program 4 times [2024-06-04 16:03:29,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:29,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203223540] [2024-06-04 16:03:29,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:29,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:29,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:29,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:29,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:29,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203223540] [2024-06-04 16:03:29,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203223540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:29,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:29,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:03:29,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005424396] [2024-06-04 16:03:29,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:29,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:03:29,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:29,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:03:29,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:03:29,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:29,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 213 transitions, 2449 flow. Second operand has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:29,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:29,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:29,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:29,860 INFO L124 PetriNetUnfolderBase]: 1954/3344 cut-off events. [2024-06-04 16:03:29,860 INFO L125 PetriNetUnfolderBase]: For 113421/113421 co-relation queries the response was YES. [2024-06-04 16:03:29,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19616 conditions, 3344 events. 1954/3344 cut-off events. For 113421/113421 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 20744 event pairs, 393 based on Foata normal form. 12/3350 useless extension candidates. Maximal degree in co-relation 19521. Up to 1990 conditions per place. [2024-06-04 16:03:29,890 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 72 changer transitions 0/262 dead transitions. [2024-06-04 16:03:29,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 262 transitions, 3029 flow [2024-06-04 16:03:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:03:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:03:29,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 257 transitions. [2024-06-04 16:03:29,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5562770562770563 [2024-06-04 16:03:29,897 INFO L175 Difference]: Start difference. First operand has 203 places, 213 transitions, 2449 flow. Second operand 11 states and 257 transitions. [2024-06-04 16:03:29,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 262 transitions, 3029 flow [2024-06-04 16:03:30,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 262 transitions, 2879 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:30,166 INFO L231 Difference]: Finished difference. Result has 203 places, 212 transitions, 2365 flow [2024-06-04 16:03:30,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2217, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2365, PETRI_PLACES=203, PETRI_TRANSITIONS=212} [2024-06-04 16:03:30,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-04 16:03:30,167 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 212 transitions, 2365 flow [2024-06-04 16:03:30,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:30,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:30,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:30,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-04 16:03:30,168 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:30,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:30,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1707000483, now seen corresponding path program 1 times [2024-06-04 16:03:30,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:30,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640109033] [2024-06-04 16:03:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:30,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:30,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:30,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:30,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640109033] [2024-06-04 16:03:30,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640109033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:30,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:30,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:30,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105810395] [2024-06-04 16:03:30,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:30,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:30,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:30,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:30,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:30,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:30,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 212 transitions, 2365 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:30,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:30,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:30,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:30,900 INFO L124 PetriNetUnfolderBase]: 1982/3382 cut-off events. [2024-06-04 16:03:30,900 INFO L125 PetriNetUnfolderBase]: For 109903/109903 co-relation queries the response was YES. [2024-06-04 16:03:30,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20038 conditions, 3382 events. 1982/3382 cut-off events. For 109903/109903 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21062 event pairs, 450 based on Foata normal form. 2/3378 useless extension candidates. Maximal degree in co-relation 19942. Up to 2902 conditions per place. [2024-06-04 16:03:30,930 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 64 changer transitions 0/244 dead transitions. [2024-06-04 16:03:30,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 244 transitions, 3271 flow [2024-06-04 16:03:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:30,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:03:30,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-04 16:03:30,932 INFO L175 Difference]: Start difference. First operand has 203 places, 212 transitions, 2365 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:03:30,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 244 transitions, 3271 flow [2024-06-04 16:03:31,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 244 transitions, 2999 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-06-04 16:03:31,197 INFO L231 Difference]: Finished difference. Result has 199 places, 223 transitions, 2406 flow [2024-06-04 16:03:31,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2406, PETRI_PLACES=199, PETRI_TRANSITIONS=223} [2024-06-04 16:03:31,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-04 16:03:31,197 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 223 transitions, 2406 flow [2024-06-04 16:03:31,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:31,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:31,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:31,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-04 16:03:31,198 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:31,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:31,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1710725133, now seen corresponding path program 2 times [2024-06-04 16:03:31,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:31,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036920592] [2024-06-04 16:03:31,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:31,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:31,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:31,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:31,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036920592] [2024-06-04 16:03:31,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036920592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:31,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:31,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:31,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950189421] [2024-06-04 16:03:31,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:31,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:31,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:31,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:31,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:31,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:31,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 223 transitions, 2406 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:31,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:31,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:31,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:31,928 INFO L124 PetriNetUnfolderBase]: 2024/3452 cut-off events. [2024-06-04 16:03:31,928 INFO L125 PetriNetUnfolderBase]: For 118225/118225 co-relation queries the response was YES. [2024-06-04 16:03:31,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20372 conditions, 3452 events. 2024/3452 cut-off events. For 118225/118225 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21583 event pairs, 452 based on Foata normal form. 2/3448 useless extension candidates. Maximal degree in co-relation 20277. Up to 3037 conditions per place. [2024-06-04 16:03:31,961 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 187 selfloop transitions, 59 changer transitions 0/253 dead transitions. [2024-06-04 16:03:31,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 253 transitions, 3330 flow [2024-06-04 16:03:31,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-04 16:03:31,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-04 16:03:31,962 INFO L175 Difference]: Start difference. First operand has 199 places, 223 transitions, 2406 flow. Second operand 9 states and 203 transitions. [2024-06-04 16:03:31,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 253 transitions, 3330 flow [2024-06-04 16:03:32,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 253 transitions, 3209 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-04 16:03:32,225 INFO L231 Difference]: Finished difference. Result has 207 places, 235 transitions, 2629 flow [2024-06-04 16:03:32,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2629, PETRI_PLACES=207, PETRI_TRANSITIONS=235} [2024-06-04 16:03:32,226 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-04 16:03:32,226 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 235 transitions, 2629 flow [2024-06-04 16:03:32,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:32,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:32,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:32,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-04 16:03:32,226 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:32,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:32,227 INFO L85 PathProgramCache]: Analyzing trace with hash 375462631, now seen corresponding path program 3 times [2024-06-04 16:03:32,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:32,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174368757] [2024-06-04 16:03:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:32,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:32,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:32,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:32,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174368757] [2024-06-04 16:03:32,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174368757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:32,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:32,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:32,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951066985] [2024-06-04 16:03:32,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:32,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:32,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:32,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:32,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 235 transitions, 2629 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:32,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:32,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:32,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:33,030 INFO L124 PetriNetUnfolderBase]: 2020/3448 cut-off events. [2024-06-04 16:03:33,031 INFO L125 PetriNetUnfolderBase]: For 120924/120924 co-relation queries the response was YES. [2024-06-04 16:03:33,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20502 conditions, 3448 events. 2020/3448 cut-off events. For 120924/120924 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 21550 event pairs, 452 based on Foata normal form. 2/3444 useless extension candidates. Maximal degree in co-relation 20404. Up to 3035 conditions per place. [2024-06-04 16:03:33,063 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 54 changer transitions 0/250 dead transitions. [2024-06-04 16:03:33,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 250 transitions, 3249 flow [2024-06-04 16:03:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:33,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:33,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:03:33,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-04 16:03:33,065 INFO L175 Difference]: Start difference. First operand has 207 places, 235 transitions, 2629 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:03:33,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 250 transitions, 3249 flow [2024-06-04 16:03:33,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 250 transitions, 3043 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:33,352 INFO L231 Difference]: Finished difference. Result has 209 places, 235 transitions, 2539 flow [2024-06-04 16:03:33,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2423, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2539, PETRI_PLACES=209, PETRI_TRANSITIONS=235} [2024-06-04 16:03:33,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-04 16:03:33,353 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 235 transitions, 2539 flow [2024-06-04 16:03:33,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:33,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:33,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:33,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-04 16:03:33,353 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:33,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:33,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1760160051, now seen corresponding path program 4 times [2024-06-04 16:03:33,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:33,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660415165] [2024-06-04 16:03:33,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:33,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:33,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:33,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660415165] [2024-06-04 16:03:33,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660415165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:33,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:33,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080301674] [2024-06-04 16:03:33,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:33,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:33,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:33,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:33,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:33,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:33,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 235 transitions, 2539 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:33,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:33,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:33,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:34,122 INFO L124 PetriNetUnfolderBase]: 2032/3470 cut-off events. [2024-06-04 16:03:34,122 INFO L125 PetriNetUnfolderBase]: For 124980/124980 co-relation queries the response was YES. [2024-06-04 16:03:34,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20600 conditions, 3470 events. 2032/3470 cut-off events. For 124980/124980 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 21750 event pairs, 452 based on Foata normal form. 2/3466 useless extension candidates. Maximal degree in co-relation 20501. Up to 2977 conditions per place. [2024-06-04 16:03:34,150 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 179 selfloop transitions, 72 changer transitions 0/258 dead transitions. [2024-06-04 16:03:34,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 258 transitions, 3299 flow [2024-06-04 16:03:34,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:34,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:03:34,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:03:34,152 INFO L175 Difference]: Start difference. First operand has 209 places, 235 transitions, 2539 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:03:34,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 258 transitions, 3299 flow [2024-06-04 16:03:34,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 258 transitions, 3191 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:34,416 INFO L231 Difference]: Finished difference. Result has 210 places, 240 transitions, 2729 flow [2024-06-04 16:03:34,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2431, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2729, PETRI_PLACES=210, PETRI_TRANSITIONS=240} [2024-06-04 16:03:34,416 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-04 16:03:34,417 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 240 transitions, 2729 flow [2024-06-04 16:03:34,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:34,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:34,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:34,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-04 16:03:34,417 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:34,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:34,417 INFO L85 PathProgramCache]: Analyzing trace with hash 576175191, now seen corresponding path program 5 times [2024-06-04 16:03:34,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:34,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2229544] [2024-06-04 16:03:34,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:34,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:34,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:34,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2229544] [2024-06-04 16:03:34,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2229544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:34,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:34,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:34,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903670629] [2024-06-04 16:03:34,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:34,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:34,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:34,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:34,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:34,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:34,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 240 transitions, 2729 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:34,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:34,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:34,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:35,210 INFO L124 PetriNetUnfolderBase]: 2050/3502 cut-off events. [2024-06-04 16:03:35,216 INFO L125 PetriNetUnfolderBase]: For 133085/133088 co-relation queries the response was YES. [2024-06-04 16:03:35,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21276 conditions, 3502 events. 2050/3502 cut-off events. For 133085/133088 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22009 event pairs, 471 based on Foata normal form. 4/3498 useless extension candidates. Maximal degree in co-relation 21175. Up to 2996 conditions per place. [2024-06-04 16:03:35,253 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 169 selfloop transitions, 89 changer transitions 0/265 dead transitions. [2024-06-04 16:03:35,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 265 transitions, 3647 flow [2024-06-04 16:03:35,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:35,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:35,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 16:03:35,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:03:35,254 INFO L175 Difference]: Start difference. First operand has 210 places, 240 transitions, 2729 flow. Second operand 8 states and 184 transitions. [2024-06-04 16:03:35,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 265 transitions, 3647 flow [2024-06-04 16:03:35,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 265 transitions, 3411 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:35,610 INFO L231 Difference]: Finished difference. Result has 213 places, 248 transitions, 2842 flow [2024-06-04 16:03:35,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2525, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2842, PETRI_PLACES=213, PETRI_TRANSITIONS=248} [2024-06-04 16:03:35,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-04 16:03:35,611 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 248 transitions, 2842 flow [2024-06-04 16:03:35,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:35,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:35,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:35,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-04 16:03:35,612 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:35,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:35,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1760165631, now seen corresponding path program 6 times [2024-06-04 16:03:35,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:35,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687477534] [2024-06-04 16:03:35,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:35,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:35,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:35,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687477534] [2024-06-04 16:03:35,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687477534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:35,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:35,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:35,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560639040] [2024-06-04 16:03:35,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:35,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:35,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:35,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:35,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:35,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:35,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 248 transitions, 2842 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:35,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:35,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:35,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:36,438 INFO L124 PetriNetUnfolderBase]: 2044/3493 cut-off events. [2024-06-04 16:03:36,439 INFO L125 PetriNetUnfolderBase]: For 129268/129268 co-relation queries the response was YES. [2024-06-04 16:03:36,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20995 conditions, 3493 events. 2044/3493 cut-off events. For 129268/129268 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21955 event pairs, 452 based on Foata normal form. 2/3489 useless extension candidates. Maximal degree in co-relation 20894. Up to 2991 conditions per place. [2024-06-04 16:03:36,474 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 172 selfloop transitions, 88 changer transitions 0/267 dead transitions. [2024-06-04 16:03:36,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 267 transitions, 3510 flow [2024-06-04 16:03:36,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:36,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:36,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-04 16:03:36,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 16:03:36,476 INFO L175 Difference]: Start difference. First operand has 213 places, 248 transitions, 2842 flow. Second operand 8 states and 186 transitions. [2024-06-04 16:03:36,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 267 transitions, 3510 flow [2024-06-04 16:03:36,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 267 transitions, 3363 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:36,810 INFO L231 Difference]: Finished difference. Result has 218 places, 248 transitions, 2883 flow [2024-06-04 16:03:36,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2695, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2883, PETRI_PLACES=218, PETRI_TRANSITIONS=248} [2024-06-04 16:03:36,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-04 16:03:36,811 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 248 transitions, 2883 flow [2024-06-04 16:03:36,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:36,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:36,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:36,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-04 16:03:36,811 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:36,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:36,812 INFO L85 PathProgramCache]: Analyzing trace with hash -318125557, now seen corresponding path program 1 times [2024-06-04 16:03:36,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:36,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867495198] [2024-06-04 16:03:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:36,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:37,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:37,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867495198] [2024-06-04 16:03:37,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867495198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:37,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:37,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:37,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48909021] [2024-06-04 16:03:37,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:37,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:37,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:37,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:37,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:37,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:37,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 248 transitions, 2883 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:37,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:37,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:37,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:37,558 INFO L124 PetriNetUnfolderBase]: 2073/3538 cut-off events. [2024-06-04 16:03:37,558 INFO L125 PetriNetUnfolderBase]: For 137165/137168 co-relation queries the response was YES. [2024-06-04 16:03:37,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21789 conditions, 3538 events. 2073/3538 cut-off events. For 137165/137168 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22224 event pairs, 473 based on Foata normal form. 1/3528 useless extension candidates. Maximal degree in co-relation 21686. Up to 2992 conditions per place. [2024-06-04 16:03:37,597 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 175 selfloop transitions, 101 changer transitions 0/283 dead transitions. [2024-06-04 16:03:37,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 283 transitions, 3901 flow [2024-06-04 16:03:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:37,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:37,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:03:37,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 16:03:37,598 INFO L175 Difference]: Start difference. First operand has 218 places, 248 transitions, 2883 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:03:37,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 283 transitions, 3901 flow [2024-06-04 16:03:37,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 283 transitions, 3631 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:37,943 INFO L231 Difference]: Finished difference. Result has 216 places, 258 transitions, 3021 flow [2024-06-04 16:03:37,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2640, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3021, PETRI_PLACES=216, PETRI_TRANSITIONS=258} [2024-06-04 16:03:37,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-04 16:03:37,944 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 258 transitions, 3021 flow [2024-06-04 16:03:37,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:37,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:37,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:37,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-04 16:03:37,945 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:37,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:37,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2073731749, now seen corresponding path program 2 times [2024-06-04 16:03:37,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:37,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844097522] [2024-06-04 16:03:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:37,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:37,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:38,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:38,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844097522] [2024-06-04 16:03:38,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844097522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:38,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:38,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:38,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308976342] [2024-06-04 16:03:38,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:38,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:38,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:38,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:38,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:38,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:38,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 258 transitions, 3021 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:38,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:38,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:38,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:38,761 INFO L124 PetriNetUnfolderBase]: 2070/3538 cut-off events. [2024-06-04 16:03:38,761 INFO L125 PetriNetUnfolderBase]: For 135324/135327 co-relation queries the response was YES. [2024-06-04 16:03:38,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21648 conditions, 3538 events. 2070/3538 cut-off events. For 135324/135327 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 22263 event pairs, 454 based on Foata normal form. 3/3534 useless extension candidates. Maximal degree in co-relation 21545. Up to 3134 conditions per place. [2024-06-04 16:03:38,801 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 53 changer transitions 0/278 dead transitions. [2024-06-04 16:03:38,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 278 transitions, 3613 flow [2024-06-04 16:03:38,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:38,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:38,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-04 16:03:38,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-04 16:03:38,802 INFO L175 Difference]: Start difference. First operand has 216 places, 258 transitions, 3021 flow. Second operand 7 states and 167 transitions. [2024-06-04 16:03:38,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 278 transitions, 3613 flow [2024-06-04 16:03:39,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 278 transitions, 3426 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:39,178 INFO L231 Difference]: Finished difference. Result has 220 places, 258 transitions, 2946 flow [2024-06-04 16:03:39,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2834, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2946, PETRI_PLACES=220, PETRI_TRANSITIONS=258} [2024-06-04 16:03:39,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-04 16:03:39,179 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 258 transitions, 2946 flow [2024-06-04 16:03:39,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:39,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:39,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:39,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-04 16:03:39,179 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:39,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:39,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1149949169, now seen corresponding path program 3 times [2024-06-04 16:03:39,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:39,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158820919] [2024-06-04 16:03:39,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:39,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:39,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:39,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158820919] [2024-06-04 16:03:39,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158820919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:39,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:39,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:39,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008612706] [2024-06-04 16:03:39,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:39,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:39,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:39,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:39,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:39,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:39,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 258 transitions, 2946 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:39,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:39,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:39,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:39,978 INFO L124 PetriNetUnfolderBase]: 2098/3585 cut-off events. [2024-06-04 16:03:39,979 INFO L125 PetriNetUnfolderBase]: For 141480/141483 co-relation queries the response was YES. [2024-06-04 16:03:40,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21962 conditions, 3585 events. 2098/3585 cut-off events. For 141480/141483 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 22576 event pairs, 454 based on Foata normal form. 3/3581 useless extension candidates. Maximal degree in co-relation 21858. Up to 3155 conditions per place. [2024-06-04 16:03:40,086 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 217 selfloop transitions, 68 changer transitions 0/292 dead transitions. [2024-06-04 16:03:40,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 292 transitions, 3911 flow [2024-06-04 16:03:40,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:40,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:40,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-04 16:03:40,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-04 16:03:40,088 INFO L175 Difference]: Start difference. First operand has 220 places, 258 transitions, 2946 flow. Second operand 8 states and 182 transitions. [2024-06-04 16:03:40,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 292 transitions, 3911 flow [2024-06-04 16:03:40,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 292 transitions, 3763 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:40,516 INFO L231 Difference]: Finished difference. Result has 226 places, 273 transitions, 3217 flow [2024-06-04 16:03:40,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2818, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3217, PETRI_PLACES=226, PETRI_TRANSITIONS=273} [2024-06-04 16:03:40,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-04 16:03:40,517 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 273 transitions, 3217 flow [2024-06-04 16:03:40,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:40,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:40,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:40,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-04 16:03:40,518 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:40,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:40,518 INFO L85 PathProgramCache]: Analyzing trace with hash -283523795, now seen corresponding path program 4 times [2024-06-04 16:03:40,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:40,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597765758] [2024-06-04 16:03:40,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:40,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:40,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:40,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597765758] [2024-06-04 16:03:40,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597765758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:40,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:40,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:40,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274812948] [2024-06-04 16:03:40,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:40,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:40,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:40,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:40,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:40,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:40,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 273 transitions, 3217 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:40,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:40,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:40,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:41,337 INFO L124 PetriNetUnfolderBase]: 2135/3641 cut-off events. [2024-06-04 16:03:41,337 INFO L125 PetriNetUnfolderBase]: For 152757/152757 co-relation queries the response was YES. [2024-06-04 16:03:41,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22782 conditions, 3641 events. 2135/3641 cut-off events. For 152757/152757 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22991 event pairs, 452 based on Foata normal form. 1/3636 useless extension candidates. Maximal degree in co-relation 22675. Up to 3040 conditions per place. [2024-06-04 16:03:41,375 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 117 changer transitions 0/307 dead transitions. [2024-06-04 16:03:41,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 307 transitions, 4386 flow [2024-06-04 16:03:41,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:41,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:03:41,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 16:03:41,377 INFO L175 Difference]: Start difference. First operand has 226 places, 273 transitions, 3217 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:03:41,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 307 transitions, 4386 flow [2024-06-04 16:03:41,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 307 transitions, 4264 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-04 16:03:41,797 INFO L231 Difference]: Finished difference. Result has 231 places, 284 transitions, 3524 flow [2024-06-04 16:03:41,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3095, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3524, PETRI_PLACES=231, PETRI_TRANSITIONS=284} [2024-06-04 16:03:41,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-04 16:03:41,798 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 284 transitions, 3524 flow [2024-06-04 16:03:41,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:41,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:41,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:41,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-04 16:03:41,799 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:41,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:41,799 INFO L85 PathProgramCache]: Analyzing trace with hash -45239925, now seen corresponding path program 5 times [2024-06-04 16:03:41,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:41,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366487269] [2024-06-04 16:03:41,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:41,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:41,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:42,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:42,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366487269] [2024-06-04 16:03:42,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366487269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:42,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:42,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:42,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744140384] [2024-06-04 16:03:42,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:42,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:42,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:42,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:42,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:42,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:42,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 284 transitions, 3524 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:42,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:42,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:42,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:42,598 INFO L124 PetriNetUnfolderBase]: 2140/3650 cut-off events. [2024-06-04 16:03:42,598 INFO L125 PetriNetUnfolderBase]: For 158822/158822 co-relation queries the response was YES. [2024-06-04 16:03:42,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23142 conditions, 3650 events. 2140/3650 cut-off events. For 158822/158822 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 23064 event pairs, 452 based on Foata normal form. 1/3645 useless extension candidates. Maximal degree in co-relation 23034. Up to 3044 conditions per place. [2024-06-04 16:03:42,638 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 185 selfloop transitions, 117 changer transitions 0/309 dead transitions. [2024-06-04 16:03:42,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 309 transitions, 4453 flow [2024-06-04 16:03:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:03:42,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 16:03:42,639 INFO L175 Difference]: Start difference. First operand has 231 places, 284 transitions, 3524 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:03:42,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 309 transitions, 4453 flow [2024-06-04 16:03:43,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 309 transitions, 4179 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:43,070 INFO L231 Difference]: Finished difference. Result has 234 places, 287 transitions, 3541 flow [2024-06-04 16:03:43,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3256, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3541, PETRI_PLACES=234, PETRI_TRANSITIONS=287} [2024-06-04 16:03:43,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-04 16:03:43,071 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 287 transitions, 3541 flow [2024-06-04 16:03:43,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:43,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:43,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:43,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-04 16:03:43,071 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:43,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:43,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1377393873, now seen corresponding path program 6 times [2024-06-04 16:03:43,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:43,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996031962] [2024-06-04 16:03:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:43,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:43,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:43,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:43,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996031962] [2024-06-04 16:03:43,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996031962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:43,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:43,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:43,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509537836] [2024-06-04 16:03:43,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:43,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:43,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:43,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:43,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:43,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:43,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 287 transitions, 3541 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:43,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:43,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:43,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:43,873 INFO L124 PetriNetUnfolderBase]: 2132/3638 cut-off events. [2024-06-04 16:03:43,873 INFO L125 PetriNetUnfolderBase]: For 161852/161852 co-relation queries the response was YES. [2024-06-04 16:03:43,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23027 conditions, 3638 events. 2132/3638 cut-off events. For 161852/161852 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 22984 event pairs, 452 based on Foata normal form. 2/3634 useless extension candidates. Maximal degree in co-relation 22918. Up to 3036 conditions per place. [2024-06-04 16:03:43,914 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 189 selfloop transitions, 109 changer transitions 0/305 dead transitions. [2024-06-04 16:03:43,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 305 transitions, 4293 flow [2024-06-04 16:03:43,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:43,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:43,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:03:43,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:03:43,915 INFO L175 Difference]: Start difference. First operand has 234 places, 287 transitions, 3541 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:03:43,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 305 transitions, 4293 flow [2024-06-04 16:03:44,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 305 transitions, 3988 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:44,425 INFO L231 Difference]: Finished difference. Result has 236 places, 287 transitions, 3462 flow [2024-06-04 16:03:44,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3236, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3462, PETRI_PLACES=236, PETRI_TRANSITIONS=287} [2024-06-04 16:03:44,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-04 16:03:44,425 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 287 transitions, 3462 flow [2024-06-04 16:03:44,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:44,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:44,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:44,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-04 16:03:44,426 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:44,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:44,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1108633173, now seen corresponding path program 7 times [2024-06-04 16:03:44,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:44,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436512328] [2024-06-04 16:03:44,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:44,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:44,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:44,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436512328] [2024-06-04 16:03:44,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436512328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:44,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:44,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:44,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289313384] [2024-06-04 16:03:44,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:44,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:44,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:44,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:44,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:44,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:44,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 287 transitions, 3462 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:44,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:44,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:44,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:45,261 INFO L124 PetriNetUnfolderBase]: 2129/3634 cut-off events. [2024-06-04 16:03:45,262 INFO L125 PetriNetUnfolderBase]: For 163436/163436 co-relation queries the response was YES. [2024-06-04 16:03:45,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22935 conditions, 3634 events. 2129/3634 cut-off events. For 163436/163436 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 22984 event pairs, 452 based on Foata normal form. 1/3629 useless extension candidates. Maximal degree in co-relation 22825. Up to 3205 conditions per place. [2024-06-04 16:03:45,308 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 57 changer transitions 0/304 dead transitions. [2024-06-04 16:03:45,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 304 transitions, 4098 flow [2024-06-04 16:03:45,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:45,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:45,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:03:45,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-04 16:03:45,309 INFO L175 Difference]: Start difference. First operand has 236 places, 287 transitions, 3462 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:03:45,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 304 transitions, 4098 flow [2024-06-04 16:03:45,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 304 transitions, 3840 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-04 16:03:45,724 INFO L231 Difference]: Finished difference. Result has 237 places, 287 transitions, 3324 flow [2024-06-04 16:03:45,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3204, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3324, PETRI_PLACES=237, PETRI_TRANSITIONS=287} [2024-06-04 16:03:45,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-04 16:03:45,729 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 287 transitions, 3324 flow [2024-06-04 16:03:45,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:45,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:45,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:45,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-04 16:03:45,729 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:45,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:45,730 INFO L85 PathProgramCache]: Analyzing trace with hash 82431405, now seen corresponding path program 8 times [2024-06-04 16:03:45,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:45,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702221362] [2024-06-04 16:03:45,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:45,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:45,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:45,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:45,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702221362] [2024-06-04 16:03:45,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702221362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:45,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:45,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:45,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033279788] [2024-06-04 16:03:45,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:45,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:45,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:45,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:45,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:46,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:46,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 287 transitions, 3324 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:46,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:46,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:46,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:46,539 INFO L124 PetriNetUnfolderBase]: 2123/3626 cut-off events. [2024-06-04 16:03:46,539 INFO L125 PetriNetUnfolderBase]: For 166103/166103 co-relation queries the response was YES. [2024-06-04 16:03:46,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22619 conditions, 3626 events. 2123/3626 cut-off events. For 166103/166103 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 22922 event pairs, 452 based on Foata normal form. 2/3622 useless extension candidates. Maximal degree in co-relation 22508. Up to 3156 conditions per place. [2024-06-04 16:03:46,576 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 227 selfloop transitions, 68 changer transitions 0/302 dead transitions. [2024-06-04 16:03:46,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 302 transitions, 4066 flow [2024-06-04 16:03:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:46,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:46,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-04 16:03:46,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-04 16:03:46,578 INFO L175 Difference]: Start difference. First operand has 237 places, 287 transitions, 3324 flow. Second operand 7 states and 164 transitions. [2024-06-04 16:03:46,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 302 transitions, 4066 flow [2024-06-04 16:03:47,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 302 transitions, 3950 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:47,038 INFO L231 Difference]: Finished difference. Result has 239 places, 287 transitions, 3353 flow [2024-06-04 16:03:47,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3353, PETRI_PLACES=239, PETRI_TRANSITIONS=287} [2024-06-04 16:03:47,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-04 16:03:47,039 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 287 transitions, 3353 flow [2024-06-04 16:03:47,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:47,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:47,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:47,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-04 16:03:47,040 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:47,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:47,040 INFO L85 PathProgramCache]: Analyzing trace with hash 134501339, now seen corresponding path program 9 times [2024-06-04 16:03:47,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:47,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930452337] [2024-06-04 16:03:47,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:47,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:47,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:47,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:47,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:47,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930452337] [2024-06-04 16:03:47,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930452337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:47,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:47,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:47,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102347514] [2024-06-04 16:03:47,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:47,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:47,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:47,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:47,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:47,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:47,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 287 transitions, 3353 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:47,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:47,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:47,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:47,876 INFO L124 PetriNetUnfolderBase]: 2115/3614 cut-off events. [2024-06-04 16:03:47,877 INFO L125 PetriNetUnfolderBase]: For 167958/167958 co-relation queries the response was YES. [2024-06-04 16:03:47,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22549 conditions, 3614 events. 2115/3614 cut-off events. For 167958/167958 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 22856 event pairs, 452 based on Foata normal form. 2/3610 useless extension candidates. Maximal degree in co-relation 22437. Up to 3148 conditions per place. [2024-06-04 16:03:47,914 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 224 selfloop transitions, 72 changer transitions 0/303 dead transitions. [2024-06-04 16:03:47,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 303 transitions, 3983 flow [2024-06-04 16:03:47,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:03:47,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:03:47,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-04 16:03:47,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-04 16:03:47,915 INFO L175 Difference]: Start difference. First operand has 239 places, 287 transitions, 3353 flow. Second operand 9 states and 201 transitions. [2024-06-04 16:03:47,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 303 transitions, 3983 flow [2024-06-04 16:03:48,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 303 transitions, 3821 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-04 16:03:48,364 INFO L231 Difference]: Finished difference. Result has 244 places, 287 transitions, 3342 flow [2024-06-04 16:03:48,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3191, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3342, PETRI_PLACES=244, PETRI_TRANSITIONS=287} [2024-06-04 16:03:48,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-04 16:03:48,365 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 287 transitions, 3342 flow [2024-06-04 16:03:48,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:48,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:48,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:48,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-04 16:03:48,365 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:48,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:48,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1602514923, now seen corresponding path program 10 times [2024-06-04 16:03:48,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:48,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345703760] [2024-06-04 16:03:48,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:48,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:48,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:48,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:48,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:48,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345703760] [2024-06-04 16:03:48,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345703760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:48,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:48,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:48,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459800946] [2024-06-04 16:03:48,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:48,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:48,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:48,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:48,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:48,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:48,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 287 transitions, 3342 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:48,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:48,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:48,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:49,190 INFO L124 PetriNetUnfolderBase]: 2109/3609 cut-off events. [2024-06-04 16:03:49,190 INFO L125 PetriNetUnfolderBase]: For 169479/169482 co-relation queries the response was YES. [2024-06-04 16:03:49,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22412 conditions, 3609 events. 2109/3609 cut-off events. For 169479/169482 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22812 event pairs, 454 based on Foata normal form. 4/3606 useless extension candidates. Maximal degree in co-relation 22299. Up to 3046 conditions per place. [2024-06-04 16:03:49,231 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 188 selfloop transitions, 123 changer transitions 0/318 dead transitions. [2024-06-04 16:03:49,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 318 transitions, 4162 flow [2024-06-04 16:03:49,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:49,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:49,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-04 16:03:49,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-04 16:03:49,233 INFO L175 Difference]: Start difference. First operand has 244 places, 287 transitions, 3342 flow. Second operand 8 states and 202 transitions. [2024-06-04 16:03:49,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 318 transitions, 4162 flow [2024-06-04 16:03:49,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 318 transitions, 3926 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:49,699 INFO L231 Difference]: Finished difference. Result has 242 places, 287 transitions, 3371 flow [2024-06-04 16:03:49,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3371, PETRI_PLACES=242, PETRI_TRANSITIONS=287} [2024-06-04 16:03:49,699 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-04 16:03:49,699 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 287 transitions, 3371 flow [2024-06-04 16:03:49,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:49,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:49,700 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:49,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-04 16:03:49,700 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:49,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:49,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1007392813, now seen corresponding path program 11 times [2024-06-04 16:03:49,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:49,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056632471] [2024-06-04 16:03:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:49,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:49,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:49,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056632471] [2024-06-04 16:03:49,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056632471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:49,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:49,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:49,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904626373] [2024-06-04 16:03:49,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:49,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:49,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:49,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:49,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:49,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:49,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 287 transitions, 3371 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:49,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:49,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:49,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:50,531 INFO L124 PetriNetUnfolderBase]: 2103/3598 cut-off events. [2024-06-04 16:03:50,531 INFO L125 PetriNetUnfolderBase]: For 170616/170616 co-relation queries the response was YES. [2024-06-04 16:03:50,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22414 conditions, 3598 events. 2103/3598 cut-off events. For 170616/170616 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 22769 event pairs, 452 based on Foata normal form. 2/3594 useless extension candidates. Maximal degree in co-relation 22301. Up to 3041 conditions per place. [2024-06-04 16:03:50,567 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 197 selfloop transitions, 103 changer transitions 0/307 dead transitions. [2024-06-04 16:03:50,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 307 transitions, 4143 flow [2024-06-04 16:03:50,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:03:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:03:50,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-04 16:03:50,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-04 16:03:50,569 INFO L175 Difference]: Start difference. First operand has 242 places, 287 transitions, 3371 flow. Second operand 6 states and 152 transitions. [2024-06-04 16:03:50,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 307 transitions, 4143 flow [2024-06-04 16:03:51,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 307 transitions, 3826 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-04 16:03:51,191 INFO L231 Difference]: Finished difference. Result has 239 places, 287 transitions, 3287 flow [2024-06-04 16:03:51,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3060, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3287, PETRI_PLACES=239, PETRI_TRANSITIONS=287} [2024-06-04 16:03:51,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-04 16:03:51,192 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 287 transitions, 3287 flow [2024-06-04 16:03:51,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:51,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:51,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:51,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-04 16:03:51,192 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:51,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:51,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1269893725, now seen corresponding path program 12 times [2024-06-04 16:03:51,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:51,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014445069] [2024-06-04 16:03:51,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:51,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:51,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:51,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014445069] [2024-06-04 16:03:51,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014445069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:51,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:51,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:51,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357199358] [2024-06-04 16:03:51,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:51,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:51,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:51,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:51,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:51,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:51,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 287 transitions, 3287 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:51,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:51,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:51,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:52,023 INFO L124 PetriNetUnfolderBase]: 2095/3586 cut-off events. [2024-06-04 16:03:52,023 INFO L125 PetriNetUnfolderBase]: For 156815/156815 co-relation queries the response was YES. [2024-06-04 16:03:52,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21957 conditions, 3586 events. 2095/3586 cut-off events. For 156815/156815 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 22684 event pairs, 452 based on Foata normal form. 2/3582 useless extension candidates. Maximal degree in co-relation 21845. Up to 3033 conditions per place. [2024-06-04 16:03:52,066 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 115 changer transitions 0/314 dead transitions. [2024-06-04 16:03:52,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 314 transitions, 3969 flow [2024-06-04 16:03:52,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:03:52,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:03:52,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 16:03:52,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-04 16:03:52,067 INFO L175 Difference]: Start difference. First operand has 239 places, 287 transitions, 3287 flow. Second operand 8 states and 197 transitions. [2024-06-04 16:03:52,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 314 transitions, 3969 flow [2024-06-04 16:03:52,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 314 transitions, 3677 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-04 16:03:52,471 INFO L231 Difference]: Finished difference. Result has 239 places, 287 transitions, 3245 flow [2024-06-04 16:03:52,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2995, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3245, PETRI_PLACES=239, PETRI_TRANSITIONS=287} [2024-06-04 16:03:52,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-04 16:03:52,472 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 287 transitions, 3245 flow [2024-06-04 16:03:52,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:52,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:52,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:52,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-04 16:03:52,472 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:52,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:52,472 INFO L85 PathProgramCache]: Analyzing trace with hash 674896643, now seen corresponding path program 1 times [2024-06-04 16:03:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:52,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244443364] [2024-06-04 16:03:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:52,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:52,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:52,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244443364] [2024-06-04 16:03:52,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244443364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:52,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:52,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:03:52,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775743132] [2024-06-04 16:03:52,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:52,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:03:52,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:52,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:03:52,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:03:52,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:03:52,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 287 transitions, 3245 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:52,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:52,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:03:52,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:53,304 INFO L124 PetriNetUnfolderBase]: 1998/3461 cut-off events. [2024-06-04 16:03:53,304 INFO L125 PetriNetUnfolderBase]: For 157727/157727 co-relation queries the response was YES. [2024-06-04 16:03:53,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21101 conditions, 3461 events. 1998/3461 cut-off events. For 157727/157727 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 22051 event pairs, 329 based on Foata normal form. 7/3428 useless extension candidates. Maximal degree in co-relation 20990. Up to 2865 conditions per place. [2024-06-04 16:03:53,341 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 231 selfloop transitions, 28 changer transitions 0/310 dead transitions. [2024-06-04 16:03:53,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 310 transitions, 3849 flow [2024-06-04 16:03:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:03:53,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:03:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-04 16:03:53,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-04 16:03:53,342 INFO L175 Difference]: Start difference. First operand has 239 places, 287 transitions, 3245 flow. Second operand 5 states and 135 transitions. [2024-06-04 16:03:53,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 310 transitions, 3849 flow [2024-06-04 16:03:53,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 310 transitions, 3592 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-04 16:03:53,804 INFO L231 Difference]: Finished difference. Result has 234 places, 288 transitions, 3069 flow [2024-06-04 16:03:53,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2988, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3069, PETRI_PLACES=234, PETRI_TRANSITIONS=288} [2024-06-04 16:03:53,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-04 16:03:53,805 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 288 transitions, 3069 flow [2024-06-04 16:03:53,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:53,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:53,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:53,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-04 16:03:53,806 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:53,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:53,806 INFO L85 PathProgramCache]: Analyzing trace with hash 690133763, now seen corresponding path program 2 times [2024-06-04 16:03:53,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:53,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917777132] [2024-06-04 16:03:53,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:53,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:54,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:54,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917777132] [2024-06-04 16:03:54,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917777132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:54,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:54,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-04 16:03:54,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915170375] [2024-06-04 16:03:54,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:54,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-04 16:03:54,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:54,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-04 16:03:54,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-04 16:03:54,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-04 16:03:54,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 288 transitions, 3069 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:54,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:54,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-04 16:03:54,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:54,528 INFO L124 PetriNetUnfolderBase]: 2002/3458 cut-off events. [2024-06-04 16:03:54,529 INFO L125 PetriNetUnfolderBase]: For 142026/142040 co-relation queries the response was YES. [2024-06-04 16:03:54,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20486 conditions, 3458 events. 2002/3458 cut-off events. For 142026/142040 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22097 event pairs, 343 based on Foata normal form. 20/3436 useless extension candidates. Maximal degree in co-relation 20377. Up to 2768 conditions per place. [2024-06-04 16:03:54,564 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 233 selfloop transitions, 25 changer transitions 0/309 dead transitions. [2024-06-04 16:03:54,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 309 transitions, 3787 flow [2024-06-04 16:03:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:03:54,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:03:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-04 16:03:54,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-04 16:03:54,566 INFO L175 Difference]: Start difference. First operand has 234 places, 288 transitions, 3069 flow. Second operand 5 states and 129 transitions. [2024-06-04 16:03:54,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 309 transitions, 3787 flow [2024-06-04 16:03:54,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 309 transitions, 3736 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:54,949 INFO L231 Difference]: Finished difference. Result has 236 places, 289 transitions, 3086 flow [2024-06-04 16:03:54,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3018, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3086, PETRI_PLACES=236, PETRI_TRANSITIONS=289} [2024-06-04 16:03:54,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-04 16:03:54,950 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 289 transitions, 3086 flow [2024-06-04 16:03:54,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:54,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:54,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:54,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-04 16:03:54,950 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:54,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:54,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1168297039, now seen corresponding path program 1 times [2024-06-04 16:03:54,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:54,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171036565] [2024-06-04 16:03:54,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:54,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:55,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:55,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171036565] [2024-06-04 16:03:55,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171036565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:55,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:55,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:55,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843450372] [2024-06-04 16:03:55,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:55,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:55,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:55,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:55,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:55,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:55,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 289 transitions, 3086 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:55,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:55,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:55,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:55,738 INFO L124 PetriNetUnfolderBase]: 2117/3651 cut-off events. [2024-06-04 16:03:55,738 INFO L125 PetriNetUnfolderBase]: For 138772/138772 co-relation queries the response was YES. [2024-06-04 16:03:55,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21498 conditions, 3651 events. 2117/3651 cut-off events. For 138772/138772 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23230 event pairs, 411 based on Foata normal form. 2/3650 useless extension candidates. Maximal degree in co-relation 21388. Up to 3248 conditions per place. [2024-06-04 16:03:55,777 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 278 selfloop transitions, 31 changer transitions 0/316 dead transitions. [2024-06-04 16:03:55,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 316 transitions, 3974 flow [2024-06-04 16:03:55,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:55,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:55,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-04 16:03:55,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-04 16:03:55,778 INFO L175 Difference]: Start difference. First operand has 236 places, 289 transitions, 3086 flow. Second operand 7 states and 163 transitions. [2024-06-04 16:03:55,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 316 transitions, 3974 flow [2024-06-04 16:03:56,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 316 transitions, 3930 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-04 16:03:56,095 INFO L231 Difference]: Finished difference. Result has 241 places, 293 transitions, 3213 flow [2024-06-04 16:03:56,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3042, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3213, PETRI_PLACES=241, PETRI_TRANSITIONS=293} [2024-06-04 16:03:56,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-04 16:03:56,096 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 293 transitions, 3213 flow [2024-06-04 16:03:56,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:56,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:56,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:56,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-04 16:03:56,097 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:56,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:56,097 INFO L85 PathProgramCache]: Analyzing trace with hash 914250657, now seen corresponding path program 2 times [2024-06-04 16:03:56,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:56,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938448482] [2024-06-04 16:03:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:56,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:56,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:56,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938448482] [2024-06-04 16:03:56,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938448482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:56,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:56,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:56,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156898194] [2024-06-04 16:03:56,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:56,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:56,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:56,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:56,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:56,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:56,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 293 transitions, 3213 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:56,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:56,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:56,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:56,882 INFO L124 PetriNetUnfolderBase]: 2125/3658 cut-off events. [2024-06-04 16:03:56,882 INFO L125 PetriNetUnfolderBase]: For 143816/143816 co-relation queries the response was YES. [2024-06-04 16:03:56,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21650 conditions, 3658 events. 2125/3658 cut-off events. For 143816/143816 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23252 event pairs, 442 based on Foata normal form. 2/3657 useless extension candidates. Maximal degree in co-relation 21539. Up to 3293 conditions per place. [2024-06-04 16:03:56,919 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 278 selfloop transitions, 28 changer transitions 0/313 dead transitions. [2024-06-04 16:03:56,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 313 transitions, 3923 flow [2024-06-04 16:03:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:56,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-04 16:03:56,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-04 16:03:56,921 INFO L175 Difference]: Start difference. First operand has 241 places, 293 transitions, 3213 flow. Second operand 7 states and 158 transitions. [2024-06-04 16:03:56,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 313 transitions, 3923 flow [2024-06-04 16:03:57,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 313 transitions, 3811 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-04 16:03:57,306 INFO L231 Difference]: Finished difference. Result has 245 places, 295 transitions, 3220 flow [2024-06-04 16:03:57,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3119, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3220, PETRI_PLACES=245, PETRI_TRANSITIONS=295} [2024-06-04 16:03:57,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-04 16:03:57,307 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 295 transitions, 3220 flow [2024-06-04 16:03:57,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:57,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:57,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:57,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-04 16:03:57,307 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:57,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:57,308 INFO L85 PathProgramCache]: Analyzing trace with hash 82441325, now seen corresponding path program 3 times [2024-06-04 16:03:57,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:57,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661748785] [2024-06-04 16:03:57,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:57,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:57,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:57,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661748785] [2024-06-04 16:03:57,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661748785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:57,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:57,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:57,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197397215] [2024-06-04 16:03:57,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:57,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:57,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:57,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:57,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 295 transitions, 3220 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:57,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:57,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:57,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:58,104 INFO L124 PetriNetUnfolderBase]: 2133/3670 cut-off events. [2024-06-04 16:03:58,105 INFO L125 PetriNetUnfolderBase]: For 148282/148282 co-relation queries the response was YES. [2024-06-04 16:03:58,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21724 conditions, 3670 events. 2133/3670 cut-off events. For 148282/148282 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23317 event pairs, 442 based on Foata normal form. 2/3669 useless extension candidates. Maximal degree in co-relation 21611. Up to 3320 conditions per place. [2024-06-04 16:03:58,145 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 285 selfloop transitions, 20 changer transitions 0/312 dead transitions. [2024-06-04 16:03:58,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 312 transitions, 3906 flow [2024-06-04 16:03:58,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-04 16:03:58,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-04 16:03:58,146 INFO L175 Difference]: Start difference. First operand has 245 places, 295 transitions, 3220 flow. Second operand 7 states and 154 transitions. [2024-06-04 16:03:58,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 312 transitions, 3906 flow [2024-06-04 16:03:58,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 312 transitions, 3825 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:58,519 INFO L231 Difference]: Finished difference. Result has 247 places, 297 transitions, 3228 flow [2024-06-04 16:03:58,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3228, PETRI_PLACES=247, PETRI_TRANSITIONS=297} [2024-06-04 16:03:58,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-04 16:03:58,520 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 297 transitions, 3228 flow [2024-06-04 16:03:58,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:58,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:58,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:58,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-04 16:03:58,520 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:58,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:58,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1492879661, now seen corresponding path program 1 times [2024-06-04 16:03:58,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:58,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845270759] [2024-06-04 16:03:58,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:58,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:03:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:03:58,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:03:58,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845270759] [2024-06-04 16:03:58,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845270759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:03:58,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:03:58,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:03:58,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036676123] [2024-06-04 16:03:58,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:03:58,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:03:58,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:03:58,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:03:58,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:03:58,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:03:58,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 297 transitions, 3228 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:58,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:03:58,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:03:58,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:03:59,346 INFO L124 PetriNetUnfolderBase]: 2149/3689 cut-off events. [2024-06-04 16:03:59,346 INFO L125 PetriNetUnfolderBase]: For 156763/156763 co-relation queries the response was YES. [2024-06-04 16:03:59,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21919 conditions, 3689 events. 2149/3689 cut-off events. For 156763/156763 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23455 event pairs, 454 based on Foata normal form. 4/3687 useless extension candidates. Maximal degree in co-relation 21805. Up to 3236 conditions per place. [2024-06-04 16:03:59,387 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 253 selfloop transitions, 55 changer transitions 0/315 dead transitions. [2024-06-04 16:03:59,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 315 transitions, 3938 flow [2024-06-04 16:03:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:03:59,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:03:59,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-04 16:03:59,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-04 16:03:59,388 INFO L175 Difference]: Start difference. First operand has 247 places, 297 transitions, 3228 flow. Second operand 7 states and 162 transitions. [2024-06-04 16:03:59,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 315 transitions, 3938 flow [2024-06-04 16:03:59,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 315 transitions, 3869 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-04 16:03:59,903 INFO L231 Difference]: Finished difference. Result has 249 places, 300 transitions, 3339 flow [2024-06-04 16:03:59,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3159, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3339, PETRI_PLACES=249, PETRI_TRANSITIONS=300} [2024-06-04 16:03:59,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-04 16:03:59,904 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 300 transitions, 3339 flow [2024-06-04 16:03:59,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:03:59,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:03:59,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:03:59,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-04 16:03:59,904 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:03:59,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:03:59,905 INFO L85 PathProgramCache]: Analyzing trace with hash 453483979, now seen corresponding path program 4 times [2024-06-04 16:03:59,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:03:59,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520782830] [2024-06-04 16:03:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:03:59,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:03:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:00,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:00,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520782830] [2024-06-04 16:04:00,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520782830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:00,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:00,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:04:00,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364875006] [2024-06-04 16:04:00,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:00,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:04:00,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:00,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:04:00,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:04:00,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:00,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 300 transitions, 3339 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:00,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:00,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:00,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:00,720 INFO L124 PetriNetUnfolderBase]: 2144/3692 cut-off events. [2024-06-04 16:04:00,721 INFO L125 PetriNetUnfolderBase]: For 154692/154692 co-relation queries the response was YES. [2024-06-04 16:04:00,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22013 conditions, 3692 events. 2144/3692 cut-off events. For 154692/154692 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23462 event pairs, 410 based on Foata normal form. 2/3691 useless extension candidates. Maximal degree in co-relation 21898. Up to 3301 conditions per place. [2024-06-04 16:04:00,760 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 284 selfloop transitions, 29 changer transitions 0/320 dead transitions. [2024-06-04 16:04:00,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 320 transitions, 4015 flow [2024-06-04 16:04:00,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-04 16:04:00,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:04:00,761 INFO L175 Difference]: Start difference. First operand has 249 places, 300 transitions, 3339 flow. Second operand 6 states and 144 transitions. [2024-06-04 16:04:00,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 320 transitions, 4015 flow [2024-06-04 16:04:01,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 320 transitions, 3831 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-04 16:04:01,221 INFO L231 Difference]: Finished difference. Result has 250 places, 300 transitions, 3224 flow [2024-06-04 16:04:01,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3155, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3224, PETRI_PLACES=250, PETRI_TRANSITIONS=300} [2024-06-04 16:04:01,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-04 16:04:01,222 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 300 transitions, 3224 flow [2024-06-04 16:04:01,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:01,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:01,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:01,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-04 16:04:01,222 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:01,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:01,222 INFO L85 PathProgramCache]: Analyzing trace with hash 453668677, now seen corresponding path program 2 times [2024-06-04 16:04:01,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:01,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885532355] [2024-06-04 16:04:01,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:01,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:01,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:01,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:01,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885532355] [2024-06-04 16:04:01,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885532355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:01,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:01,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:04:01,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044246567] [2024-06-04 16:04:01,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:01,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:04:01,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:01,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:04:01,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:04:01,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:01,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 300 transitions, 3224 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:01,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:01,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:01,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:02,054 INFO L124 PetriNetUnfolderBase]: 2160/3706 cut-off events. [2024-06-04 16:04:02,054 INFO L125 PetriNetUnfolderBase]: For 162752/162752 co-relation queries the response was YES. [2024-06-04 16:04:02,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22041 conditions, 3706 events. 2160/3706 cut-off events. For 162752/162752 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 23525 event pairs, 453 based on Foata normal form. 4/3704 useless extension candidates. Maximal degree in co-relation 21925. Up to 3241 conditions per place. [2024-06-04 16:04:02,090 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 250 selfloop transitions, 60 changer transitions 0/317 dead transitions. [2024-06-04 16:04:02,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 317 transitions, 3942 flow [2024-06-04 16:04:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:02,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:02,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-04 16:04:02,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:04:02,092 INFO L175 Difference]: Start difference. First operand has 250 places, 300 transitions, 3224 flow. Second operand 6 states and 142 transitions. [2024-06-04 16:04:02,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 317 transitions, 3942 flow [2024-06-04 16:04:02,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 317 transitions, 3875 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:04:02,617 INFO L231 Difference]: Finished difference. Result has 251 places, 303 transitions, 3357 flow [2024-06-04 16:04:02,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3157, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3357, PETRI_PLACES=251, PETRI_TRANSITIONS=303} [2024-06-04 16:04:02,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-04 16:04:02,618 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 303 transitions, 3357 flow [2024-06-04 16:04:02,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:02,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:02,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:02,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-04 16:04:02,618 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:02,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:02,619 INFO L85 PathProgramCache]: Analyzing trace with hash 689844037, now seen corresponding path program 3 times [2024-06-04 16:04:02,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:02,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357366112] [2024-06-04 16:04:02,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:02,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:02,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:02,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357366112] [2024-06-04 16:04:02,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357366112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:02,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:02,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:04:02,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194333393] [2024-06-04 16:04:02,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:02,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:04:02,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:02,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:04:02,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:04:02,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:02,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 303 transitions, 3357 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:02,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:02,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:02,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:03,411 INFO L124 PetriNetUnfolderBase]: 2176/3731 cut-off events. [2024-06-04 16:04:03,412 INFO L125 PetriNetUnfolderBase]: For 165374/165377 co-relation queries the response was YES. [2024-06-04 16:04:03,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22489 conditions, 3731 events. 2176/3731 cut-off events. For 165374/165377 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 23772 event pairs, 478 based on Foata normal form. 6/3729 useless extension candidates. Maximal degree in co-relation 22372. Up to 3277 conditions per place. [2024-06-04 16:04:03,452 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 253 selfloop transitions, 57 changer transitions 0/317 dead transitions. [2024-06-04 16:04:03,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 317 transitions, 4073 flow [2024-06-04 16:04:03,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:03,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-04 16:04:03,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-04 16:04:03,453 INFO L175 Difference]: Start difference. First operand has 251 places, 303 transitions, 3357 flow. Second operand 6 states and 139 transitions. [2024-06-04 16:04:03,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 317 transitions, 4073 flow [2024-06-04 16:04:04,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 317 transitions, 3895 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-04 16:04:04,025 INFO L231 Difference]: Finished difference. Result has 253 places, 306 transitions, 3375 flow [2024-06-04 16:04:04,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3185, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3375, PETRI_PLACES=253, PETRI_TRANSITIONS=306} [2024-06-04 16:04:04,025 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-04 16:04:04,025 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 306 transitions, 3375 flow [2024-06-04 16:04:04,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:04,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:04,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:04,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-04 16:04:04,026 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:04,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:04,026 INFO L85 PathProgramCache]: Analyzing trace with hash 690140707, now seen corresponding path program 4 times [2024-06-04 16:04:04,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:04,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719702272] [2024-06-04 16:04:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:04,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:04,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:04,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719702272] [2024-06-04 16:04:04,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719702272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:04,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:04,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:04:04,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193086275] [2024-06-04 16:04:04,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:04,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:04:04,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:04,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:04:04,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:04:04,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:04,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 306 transitions, 3375 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:04,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:04,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:04,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:04,839 INFO L124 PetriNetUnfolderBase]: 2179/3725 cut-off events. [2024-06-04 16:04:04,839 INFO L125 PetriNetUnfolderBase]: For 160552/160555 co-relation queries the response was YES. [2024-06-04 16:04:04,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22249 conditions, 3725 events. 2179/3725 cut-off events. For 160552/160555 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 23632 event pairs, 465 based on Foata normal form. 6/3723 useless extension candidates. Maximal degree in co-relation 22131. Up to 3230 conditions per place. [2024-06-04 16:04:04,879 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 248 selfloop transitions, 68 changer transitions 0/323 dead transitions. [2024-06-04 16:04:04,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 323 transitions, 4134 flow [2024-06-04 16:04:04,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:04,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-04 16:04:04,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-04 16:04:04,881 INFO L175 Difference]: Start difference. First operand has 253 places, 306 transitions, 3375 flow. Second operand 6 states and 140 transitions. [2024-06-04 16:04:04,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 323 transitions, 4134 flow [2024-06-04 16:04:05,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 323 transitions, 3966 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-04 16:04:05,443 INFO L231 Difference]: Finished difference. Result has 256 places, 311 transitions, 3472 flow [2024-06-04 16:04:05,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3207, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3472, PETRI_PLACES=256, PETRI_TRANSITIONS=311} [2024-06-04 16:04:05,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-04 16:04:05,444 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 311 transitions, 3472 flow [2024-06-04 16:04:05,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:05,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:05,444 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] [2024-06-04 16:04:05,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-04 16:04:05,444 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:05,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:05,445 INFO L85 PathProgramCache]: Analyzing trace with hash -542193814, now seen corresponding path program 1 times [2024-06-04 16:04:05,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:05,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734851498] [2024-06-04 16:04:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:05,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:05,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:05,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734851498] [2024-06-04 16:04:05,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734851498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:05,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:05,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:05,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198567435] [2024-06-04 16:04:05,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:05,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:05,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:05,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:05,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:05,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:05,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 311 transitions, 3472 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:05,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:05,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:05,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:06,373 INFO L124 PetriNetUnfolderBase]: 2338/4000 cut-off events. [2024-06-04 16:04:06,373 INFO L125 PetriNetUnfolderBase]: For 223071/223071 co-relation queries the response was YES. [2024-06-04 16:04:06,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25528 conditions, 4000 events. 2338/4000 cut-off events. For 223071/223071 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 25707 event pairs, 412 based on Foata normal form. 12/4006 useless extension candidates. Maximal degree in co-relation 25408. Up to 2885 conditions per place. [2024-06-04 16:04:06,417 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 227 selfloop transitions, 117 changer transitions 0/351 dead transitions. [2024-06-04 16:04:06,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 351 transitions, 4722 flow [2024-06-04 16:04:06,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:06,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 16:04:06,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-04 16:04:06,418 INFO L175 Difference]: Start difference. First operand has 256 places, 311 transitions, 3472 flow. Second operand 8 states and 197 transitions. [2024-06-04 16:04:06,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 351 transitions, 4722 flow [2024-06-04 16:04:06,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 351 transitions, 4572 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-04 16:04:06,947 INFO L231 Difference]: Finished difference. Result has 263 places, 316 transitions, 3709 flow [2024-06-04 16:04:06,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3322, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3709, PETRI_PLACES=263, PETRI_TRANSITIONS=316} [2024-06-04 16:04:06,947 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-04 16:04:06,948 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 316 transitions, 3709 flow [2024-06-04 16:04:06,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:06,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:06,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:06,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-04 16:04:06,948 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:06,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash -250006206, now seen corresponding path program 2 times [2024-06-04 16:04:06,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:06,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732823148] [2024-06-04 16:04:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:06,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:07,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:07,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732823148] [2024-06-04 16:04:07,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732823148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:07,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:07,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:07,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78982174] [2024-06-04 16:04:07,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:07,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:07,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:07,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:07,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:07,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:07,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 316 transitions, 3709 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:07,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:07,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:07,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:07,923 INFO L124 PetriNetUnfolderBase]: 2394/4091 cut-off events. [2024-06-04 16:04:07,923 INFO L125 PetriNetUnfolderBase]: For 241884/241884 co-relation queries the response was YES. [2024-06-04 16:04:07,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26738 conditions, 4091 events. 2394/4091 cut-off events. For 241884/241884 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 26404 event pairs, 527 based on Foata normal form. 16/4101 useless extension candidates. Maximal degree in co-relation 26615. Up to 3408 conditions per place. [2024-06-04 16:04:07,972 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 219 selfloop transitions, 114 changer transitions 0/340 dead transitions. [2024-06-04 16:04:07,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 340 transitions, 4507 flow [2024-06-04 16:04:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:07,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:04:07,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:04:07,974 INFO L175 Difference]: Start difference. First operand has 263 places, 316 transitions, 3709 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:04:07,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 340 transitions, 4507 flow [2024-06-04 16:04:08,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 340 transitions, 4321 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-04 16:04:08,617 INFO L231 Difference]: Finished difference. Result has 268 places, 318 transitions, 3819 flow [2024-06-04 16:04:08,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3525, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3819, PETRI_PLACES=268, PETRI_TRANSITIONS=318} [2024-06-04 16:04:08,618 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-04 16:04:08,618 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 318 transitions, 3819 flow [2024-06-04 16:04:08,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:08,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:08,619 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:08,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-04 16:04:08,619 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:08,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:08,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1018343894, now seen corresponding path program 3 times [2024-06-04 16:04:08,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:08,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374400799] [2024-06-04 16:04:08,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:08,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:08,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:08,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:08,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374400799] [2024-06-04 16:04:08,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374400799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:08,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:08,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:08,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606362058] [2024-06-04 16:04:08,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:08,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:08,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:08,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:08,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:08,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:08,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 318 transitions, 3819 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:08,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:08,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:08,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:09,696 INFO L124 PetriNetUnfolderBase]: 2500/4261 cut-off events. [2024-06-04 16:04:09,696 INFO L125 PetriNetUnfolderBase]: For 265960/265960 co-relation queries the response was YES. [2024-06-04 16:04:09,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28734 conditions, 4261 events. 2500/4261 cut-off events. For 265960/265960 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27661 event pairs, 536 based on Foata normal form. 12/4267 useless extension candidates. Maximal degree in co-relation 28609. Up to 3414 conditions per place. [2024-06-04 16:04:09,738 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 229 selfloop transitions, 112 changer transitions 0/348 dead transitions. [2024-06-04 16:04:09,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 348 transitions, 4841 flow [2024-06-04 16:04:09,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:09,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:09,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:04:09,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 16:04:09,740 INFO L175 Difference]: Start difference. First operand has 268 places, 318 transitions, 3819 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:04:09,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 348 transitions, 4841 flow [2024-06-04 16:04:10,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 348 transitions, 4577 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:10,280 INFO L231 Difference]: Finished difference. Result has 271 places, 322 transitions, 3922 flow [2024-06-04 16:04:10,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3555, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3922, PETRI_PLACES=271, PETRI_TRANSITIONS=322} [2024-06-04 16:04:10,281 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-04 16:04:10,281 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 322 transitions, 3922 flow [2024-06-04 16:04:10,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:10,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:10,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:10,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-04 16:04:10,282 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:10,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:10,282 INFO L85 PathProgramCache]: Analyzing trace with hash -971091382, now seen corresponding path program 4 times [2024-06-04 16:04:10,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:10,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844302244] [2024-06-04 16:04:10,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:10,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:10,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:10,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:10,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844302244] [2024-06-04 16:04:10,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844302244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:10,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:10,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:10,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326026871] [2024-06-04 16:04:10,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:10,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:10,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:10,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:10,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:10,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:10,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 322 transitions, 3922 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:10,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:10,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:10,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:11,319 INFO L124 PetriNetUnfolderBase]: 2556/4351 cut-off events. [2024-06-04 16:04:11,319 INFO L125 PetriNetUnfolderBase]: For 286386/286386 co-relation queries the response was YES. [2024-06-04 16:04:11,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29504 conditions, 4351 events. 2556/4351 cut-off events. For 286386/286386 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 28351 event pairs, 559 based on Foata normal form. 16/4361 useless extension candidates. Maximal degree in co-relation 29377. Up to 3780 conditions per place. [2024-06-04 16:04:11,370 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 72 changer transitions 0/343 dead transitions. [2024-06-04 16:04:11,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 343 transitions, 4724 flow [2024-06-04 16:04:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:11,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 16:04:11,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:04:11,371 INFO L175 Difference]: Start difference. First operand has 271 places, 322 transitions, 3922 flow. Second operand 8 states and 184 transitions. [2024-06-04 16:04:11,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 343 transitions, 4724 flow [2024-06-04 16:04:12,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 343 transitions, 4534 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 16:04:12,048 INFO L231 Difference]: Finished difference. Result has 275 places, 324 transitions, 3950 flow [2024-06-04 16:04:12,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3732, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3950, PETRI_PLACES=275, PETRI_TRANSITIONS=324} [2024-06-04 16:04:12,048 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-04 16:04:12,048 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 324 transitions, 3950 flow [2024-06-04 16:04:12,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:12,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:12,049 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] [2024-06-04 16:04:12,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-04 16:04:12,049 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:12,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:12,049 INFO L85 PathProgramCache]: Analyzing trace with hash -965584852, now seen corresponding path program 5 times [2024-06-04 16:04:12,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:12,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819826183] [2024-06-04 16:04:12,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:12,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:12,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:12,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819826183] [2024-06-04 16:04:12,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819826183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:12,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:12,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:12,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869444769] [2024-06-04 16:04:12,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:12,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:12,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:12,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:12,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:12,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:12,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 324 transitions, 3950 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:12,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:12,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:12,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:13,144 INFO L124 PetriNetUnfolderBase]: 2612/4447 cut-off events. [2024-06-04 16:04:13,145 INFO L125 PetriNetUnfolderBase]: For 294350/294350 co-relation queries the response was YES. [2024-06-04 16:04:13,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30253 conditions, 4447 events. 2612/4447 cut-off events. For 294350/294350 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29151 event pairs, 573 based on Foata normal form. 16/4457 useless extension candidates. Maximal degree in co-relation 30124. Up to 3868 conditions per place. [2024-06-04 16:04:13,201 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 262 selfloop transitions, 78 changer transitions 0/347 dead transitions. [2024-06-04 16:04:13,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 347 transitions, 4768 flow [2024-06-04 16:04:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:04:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:04:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-04 16:04:13,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-04 16:04:13,203 INFO L175 Difference]: Start difference. First operand has 275 places, 324 transitions, 3950 flow. Second operand 10 states and 222 transitions. [2024-06-04 16:04:13,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 347 transitions, 4768 flow [2024-06-04 16:04:13,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 347 transitions, 4580 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:13,818 INFO L231 Difference]: Finished difference. Result has 279 places, 326 transitions, 3996 flow [2024-06-04 16:04:13,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3762, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3996, PETRI_PLACES=279, PETRI_TRANSITIONS=326} [2024-06-04 16:04:13,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-04 16:04:13,819 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 326 transitions, 3996 flow [2024-06-04 16:04:13,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:13,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:13,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:13,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-04 16:04:13,819 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:13,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:13,820 INFO L85 PathProgramCache]: Analyzing trace with hash -971095102, now seen corresponding path program 6 times [2024-06-04 16:04:13,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:13,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141547767] [2024-06-04 16:04:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:13,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:14,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:14,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:14,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141547767] [2024-06-04 16:04:14,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141547767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:14,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:14,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:14,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526239914] [2024-06-04 16:04:14,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:14,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:14,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:14,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:14,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:14,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:14,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 326 transitions, 3996 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:14,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:14,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:14,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:14,968 INFO L124 PetriNetUnfolderBase]: 2718/4615 cut-off events. [2024-06-04 16:04:14,968 INFO L125 PetriNetUnfolderBase]: For 320739/320739 co-relation queries the response was YES. [2024-06-04 16:04:15,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32269 conditions, 4615 events. 2718/4615 cut-off events. For 320739/320739 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30361 event pairs, 580 based on Foata normal form. 12/4621 useless extension candidates. Maximal degree in co-relation 32139. Up to 3790 conditions per place. [2024-06-04 16:04:15,015 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 71 changer transitions 0/353 dead transitions. [2024-06-04 16:04:15,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 353 transitions, 5046 flow [2024-06-04 16:04:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:04:15,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:04:15,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:04:15,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-04 16:04:15,016 INFO L175 Difference]: Start difference. First operand has 279 places, 326 transitions, 3996 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:04:15,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 353 transitions, 5046 flow [2024-06-04 16:04:15,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 353 transitions, 4842 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:15,696 INFO L231 Difference]: Finished difference. Result has 280 places, 330 transitions, 4101 flow [2024-06-04 16:04:15,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4101, PETRI_PLACES=280, PETRI_TRANSITIONS=330} [2024-06-04 16:04:15,697 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-04 16:04:15,697 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 330 transitions, 4101 flow [2024-06-04 16:04:15,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:15,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:15,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:15,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-04 16:04:15,698 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:15,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:15,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1733559468, now seen corresponding path program 1 times [2024-06-04 16:04:15,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:15,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109193320] [2024-06-04 16:04:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:15,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:15,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:15,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109193320] [2024-06-04 16:04:15,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109193320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:15,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:15,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:15,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956217334] [2024-06-04 16:04:15,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:15,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:15,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:15,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:15,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:16,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:16,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 330 transitions, 4101 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:16,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:16,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:16,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:16,829 INFO L124 PetriNetUnfolderBase]: 2758/4687 cut-off events. [2024-06-04 16:04:16,829 INFO L125 PetriNetUnfolderBase]: For 331120/331120 co-relation queries the response was YES. [2024-06-04 16:04:16,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32795 conditions, 4687 events. 2758/4687 cut-off events. For 331120/331120 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30988 event pairs, 595 based on Foata normal form. 12/4693 useless extension candidates. Maximal degree in co-relation 32663. Up to 3974 conditions per place. [2024-06-04 16:04:16,885 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 85 changer transitions 0/356 dead transitions. [2024-06-04 16:04:16,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 356 transitions, 4955 flow [2024-06-04 16:04:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:04:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:04:16,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-04 16:04:16,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 16:04:16,886 INFO L175 Difference]: Start difference. First operand has 280 places, 330 transitions, 4101 flow. Second operand 10 states and 224 transitions. [2024-06-04 16:04:16,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 356 transitions, 4955 flow [2024-06-04 16:04:17,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 356 transitions, 4801 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-04 16:04:17,739 INFO L231 Difference]: Finished difference. Result has 286 places, 332 transitions, 4194 flow [2024-06-04 16:04:17,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3947, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4194, PETRI_PLACES=286, PETRI_TRANSITIONS=332} [2024-06-04 16:04:17,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-04 16:04:17,740 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 332 transitions, 4194 flow [2024-06-04 16:04:17,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:17,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:17,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:17,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-04 16:04:17,741 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:17,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:17,741 INFO L85 PathProgramCache]: Analyzing trace with hash -346385930, now seen corresponding path program 7 times [2024-06-04 16:04:17,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:17,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861315312] [2024-06-04 16:04:17,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:17,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:17,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:17,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861315312] [2024-06-04 16:04:17,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861315312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:17,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:17,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:17,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937021492] [2024-06-04 16:04:17,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:17,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:17,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:18,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:18,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:18,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:18,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 332 transitions, 4194 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:18,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:18,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:18,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:18,893 INFO L124 PetriNetUnfolderBase]: 2814/4776 cut-off events. [2024-06-04 16:04:18,893 INFO L125 PetriNetUnfolderBase]: For 351529/351532 co-relation queries the response was YES. [2024-06-04 16:04:18,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33612 conditions, 4776 events. 2814/4776 cut-off events. For 351529/351532 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31687 event pairs, 636 based on Foata normal form. 18/4786 useless extension candidates. Maximal degree in co-relation 33478. Up to 4098 conditions per place. [2024-06-04 16:04:18,952 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 227 selfloop transitions, 120 changer transitions 0/354 dead transitions. [2024-06-04 16:04:18,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 354 transitions, 5034 flow [2024-06-04 16:04:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:18,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-04 16:04:18,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-04 16:04:18,953 INFO L175 Difference]: Start difference. First operand has 286 places, 332 transitions, 4194 flow. Second operand 9 states and 203 transitions. [2024-06-04 16:04:18,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 354 transitions, 5034 flow [2024-06-04 16:04:19,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 354 transitions, 4811 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:19,809 INFO L231 Difference]: Finished difference. Result has 287 places, 334 transitions, 4299 flow [2024-06-04 16:04:19,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3971, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4299, PETRI_PLACES=287, PETRI_TRANSITIONS=334} [2024-06-04 16:04:19,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-04 16:04:19,809 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 334 transitions, 4299 flow [2024-06-04 16:04:19,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:19,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:19,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:19,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-04 16:04:19,810 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:19,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:19,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1173250632, now seen corresponding path program 8 times [2024-06-04 16:04:19,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:19,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333559522] [2024-06-04 16:04:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:19,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:20,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:20,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:20,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333559522] [2024-06-04 16:04:20,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333559522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:20,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:20,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:20,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266039621] [2024-06-04 16:04:20,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:20,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:20,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:20,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:20,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:20,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:20,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 334 transitions, 4299 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:20,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:20,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:20,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:20,995 INFO L124 PetriNetUnfolderBase]: 2870/4875 cut-off events. [2024-06-04 16:04:20,995 INFO L125 PetriNetUnfolderBase]: For 364414/364414 co-relation queries the response was YES. [2024-06-04 16:04:21,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34448 conditions, 4875 events. 2870/4875 cut-off events. For 364414/364414 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 32480 event pairs, 633 based on Foata normal form. 16/4885 useless extension candidates. Maximal degree in co-relation 34313. Up to 4122 conditions per place. [2024-06-04 16:04:21,048 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 109 changer transitions 0/357 dead transitions. [2024-06-04 16:04:21,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 357 transitions, 5153 flow [2024-06-04 16:04:21,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:21,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:21,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-04 16:04:21,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:04:21,049 INFO L175 Difference]: Start difference. First operand has 287 places, 334 transitions, 4299 flow. Second operand 7 states and 168 transitions. [2024-06-04 16:04:21,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 357 transitions, 5153 flow [2024-06-04 16:04:21,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 357 transitions, 4855 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:21,842 INFO L231 Difference]: Finished difference. Result has 287 places, 336 transitions, 4315 flow [2024-06-04 16:04:21,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4315, PETRI_PLACES=287, PETRI_TRANSITIONS=336} [2024-06-04 16:04:21,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-04 16:04:21,843 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 336 transitions, 4315 flow [2024-06-04 16:04:21,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:21,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:21,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:21,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-04 16:04:21,843 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:21,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:21,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1178613012, now seen corresponding path program 9 times [2024-06-04 16:04:21,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:21,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366756794] [2024-06-04 16:04:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:21,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:22,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:22,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366756794] [2024-06-04 16:04:22,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366756794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:22,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:22,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:22,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111851641] [2024-06-04 16:04:22,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:22,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:22,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:22,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:22,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:22,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:22,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 336 transitions, 4315 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:22,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:22,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:22,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:22,927 INFO L124 PetriNetUnfolderBase]: 2913/4940 cut-off events. [2024-06-04 16:04:22,928 INFO L125 PetriNetUnfolderBase]: For 368977/368977 co-relation queries the response was YES. [2024-06-04 16:04:22,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34782 conditions, 4940 events. 2913/4940 cut-off events. For 368977/368977 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 33004 event pairs, 636 based on Foata normal form. 16/4950 useless extension candidates. Maximal degree in co-relation 34646. Up to 4191 conditions per place. [2024-06-04 16:04:22,990 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 121 changer transitions 0/361 dead transitions. [2024-06-04 16:04:22,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 361 transitions, 5185 flow [2024-06-04 16:04:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:22,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:22,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-04 16:04:22,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-04 16:04:22,992 INFO L175 Difference]: Start difference. First operand has 287 places, 336 transitions, 4315 flow. Second operand 9 states and 206 transitions. [2024-06-04 16:04:22,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 361 transitions, 5185 flow [2024-06-04 16:04:23,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 361 transitions, 4915 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-04 16:04:23,886 INFO L231 Difference]: Finished difference. Result has 291 places, 338 transitions, 4387 flow [2024-06-04 16:04:23,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4045, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4387, PETRI_PLACES=291, PETRI_TRANSITIONS=338} [2024-06-04 16:04:23,887 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-04 16:04:23,887 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 338 transitions, 4387 flow [2024-06-04 16:04:23,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:23,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:23,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:23,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-04 16:04:23,887 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:23,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:23,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1173102762, now seen corresponding path program 10 times [2024-06-04 16:04:23,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:23,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110129392] [2024-06-04 16:04:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:23,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:24,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:24,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110129392] [2024-06-04 16:04:24,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110129392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:24,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:24,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:24,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789968574] [2024-06-04 16:04:24,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:24,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:24,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:24,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:24,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:24,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:24,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 338 transitions, 4387 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:24,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:24,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:24,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:25,003 INFO L124 PetriNetUnfolderBase]: 2927/4985 cut-off events. [2024-06-04 16:04:25,003 INFO L125 PetriNetUnfolderBase]: For 349665/349665 co-relation queries the response was YES. [2024-06-04 16:04:25,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34433 conditions, 4985 events. 2927/4985 cut-off events. For 349665/349665 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 33390 event pairs, 525 based on Foata normal form. 12/4991 useless extension candidates. Maximal degree in co-relation 34296. Up to 3550 conditions per place. [2024-06-04 16:04:25,064 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 245 selfloop transitions, 117 changer transitions 0/369 dead transitions. [2024-06-04 16:04:25,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 369 transitions, 5481 flow [2024-06-04 16:04:25,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:25,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 16:04:25,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:04:25,065 INFO L175 Difference]: Start difference. First operand has 291 places, 338 transitions, 4387 flow. Second operand 7 states and 175 transitions. [2024-06-04 16:04:25,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 369 transitions, 5481 flow [2024-06-04 16:04:25,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 369 transitions, 5183 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:25,978 INFO L231 Difference]: Finished difference. Result has 292 places, 341 transitions, 4514 flow [2024-06-04 16:04:25,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4089, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4514, PETRI_PLACES=292, PETRI_TRANSITIONS=341} [2024-06-04 16:04:25,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-04 16:04:25,978 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 341 transitions, 4514 flow [2024-06-04 16:04:25,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:25,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:25,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:25,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-04 16:04:25,979 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:25,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:25,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1820819982, now seen corresponding path program 2 times [2024-06-04 16:04:25,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:25,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824751949] [2024-06-04 16:04:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:25,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:26,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:26,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:26,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824751949] [2024-06-04 16:04:26,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824751949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:26,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:26,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:26,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695889997] [2024-06-04 16:04:26,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:26,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:26,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:26,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:26,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:26,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 341 transitions, 4514 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:26,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:26,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:26,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:27,111 INFO L124 PetriNetUnfolderBase]: 2967/5040 cut-off events. [2024-06-04 16:04:27,112 INFO L125 PetriNetUnfolderBase]: For 360614/360614 co-relation queries the response was YES. [2024-06-04 16:04:27,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35158 conditions, 5040 events. 2967/5040 cut-off events. For 360614/360614 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33788 event pairs, 622 based on Foata normal form. 12/5046 useless extension candidates. Maximal degree in co-relation 35019. Up to 4033 conditions per place. [2024-06-04 16:04:27,176 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 227 selfloop transitions, 135 changer transitions 0/369 dead transitions. [2024-06-04 16:04:27,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 369 transitions, 5412 flow [2024-06-04 16:04:27,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:27,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 16:04:27,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-04 16:04:27,177 INFO L175 Difference]: Start difference. First operand has 292 places, 341 transitions, 4514 flow. Second operand 9 states and 208 transitions. [2024-06-04 16:04:27,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 369 transitions, 5412 flow [2024-06-04 16:04:28,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 369 transitions, 5004 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-04 16:04:28,175 INFO L231 Difference]: Finished difference. Result has 295 places, 343 transitions, 4468 flow [2024-06-04 16:04:28,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4108, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4468, PETRI_PLACES=295, PETRI_TRANSITIONS=343} [2024-06-04 16:04:28,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-04 16:04:28,176 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 343 transitions, 4468 flow [2024-06-04 16:04:28,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:28,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:28,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:28,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-04 16:04:28,177 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:28,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:28,177 INFO L85 PathProgramCache]: Analyzing trace with hash -89670218, now seen corresponding path program 3 times [2024-06-04 16:04:28,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:28,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715637786] [2024-06-04 16:04:28,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:28,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:28,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:28,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:28,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715637786] [2024-06-04 16:04:28,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715637786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:28,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:28,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:28,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828627684] [2024-06-04 16:04:28,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:28,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:28,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:28,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:28,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:28,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:28,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 343 transitions, 4468 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:28,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:28,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:28,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:29,363 INFO L124 PetriNetUnfolderBase]: 3007/5113 cut-off events. [2024-06-04 16:04:29,363 INFO L125 PetriNetUnfolderBase]: For 356852/356855 co-relation queries the response was YES. [2024-06-04 16:04:29,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34909 conditions, 5113 events. 3007/5113 cut-off events. For 356852/356855 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 34465 event pairs, 667 based on Foata normal form. 14/5119 useless extension candidates. Maximal degree in co-relation 34770. Up to 4349 conditions per place. [2024-06-04 16:04:29,432 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 237 selfloop transitions, 125 changer transitions 0/369 dead transitions. [2024-06-04 16:04:29,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 369 transitions, 5362 flow [2024-06-04 16:04:29,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:04:29,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:04:29,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-04 16:04:29,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-04 16:04:29,433 INFO L175 Difference]: Start difference. First operand has 295 places, 343 transitions, 4468 flow. Second operand 10 states and 224 transitions. [2024-06-04 16:04:29,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 369 transitions, 5362 flow [2024-06-04 16:04:30,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 369 transitions, 5026 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:30,441 INFO L231 Difference]: Finished difference. Result has 298 places, 345 transitions, 4473 flow [2024-06-04 16:04:30,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4136, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4473, PETRI_PLACES=298, PETRI_TRANSITIONS=345} [2024-06-04 16:04:30,442 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-04 16:04:30,442 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 345 transitions, 4473 flow [2024-06-04 16:04:30,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:30,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:30,443 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] [2024-06-04 16:04:30,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-04 16:04:30,443 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:30,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:30,443 INFO L85 PathProgramCache]: Analyzing trace with hash -80473448, now seen corresponding path program 4 times [2024-06-04 16:04:30,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:30,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002896826] [2024-06-04 16:04:30,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:30,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:30,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:30,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002896826] [2024-06-04 16:04:30,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002896826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:30,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:30,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:30,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37589943] [2024-06-04 16:04:30,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:30,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:30,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:30,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:30,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:30,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:30,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 345 transitions, 4473 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:30,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:30,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:30,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:31,593 INFO L124 PetriNetUnfolderBase]: 3014/5134 cut-off events. [2024-06-04 16:04:31,593 INFO L125 PetriNetUnfolderBase]: For 336008/336011 co-relation queries the response was YES. [2024-06-04 16:04:31,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34032 conditions, 5134 events. 3014/5134 cut-off events. For 336008/336011 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 34627 event pairs, 649 based on Foata normal form. 14/5140 useless extension candidates. Maximal degree in co-relation 33892. Up to 3910 conditions per place. [2024-06-04 16:04:31,652 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 216 selfloop transitions, 147 changer transitions 0/370 dead transitions. [2024-06-04 16:04:31,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 370 transitions, 5317 flow [2024-06-04 16:04:31,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:31,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-04 16:04:31,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-04 16:04:31,653 INFO L175 Difference]: Start difference. First operand has 298 places, 345 transitions, 4473 flow. Second operand 9 states and 206 transitions. [2024-06-04 16:04:31,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 370 transitions, 5317 flow [2024-06-04 16:04:32,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 370 transitions, 5004 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:32,611 INFO L231 Difference]: Finished difference. Result has 299 places, 346 transitions, 4491 flow [2024-06-04 16:04:32,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4491, PETRI_PLACES=299, PETRI_TRANSITIONS=346} [2024-06-04 16:04:32,611 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-04 16:04:32,611 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 346 transitions, 4491 flow [2024-06-04 16:04:32,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:32,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:32,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:32,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-04 16:04:32,612 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:32,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:32,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1104635636, now seen corresponding path program 1 times [2024-06-04 16:04:32,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:32,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716956363] [2024-06-04 16:04:32,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:32,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:32,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:32,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:32,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716956363] [2024-06-04 16:04:32,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716956363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:32,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:32,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:32,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003821811] [2024-06-04 16:04:32,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:32,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:32,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:32,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:32,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:32,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:32,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 346 transitions, 4491 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:32,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:32,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:32,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:33,795 INFO L124 PetriNetUnfolderBase]: 3035/5173 cut-off events. [2024-06-04 16:04:33,795 INFO L125 PetriNetUnfolderBase]: For 315378/315378 co-relation queries the response was YES. [2024-06-04 16:04:33,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34436 conditions, 5173 events. 3035/5173 cut-off events. For 315378/315378 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 34933 event pairs, 653 based on Foata normal form. 1/5169 useless extension candidates. Maximal degree in co-relation 34295. Up to 4620 conditions per place. [2024-06-04 16:04:33,865 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 67 changer transitions 0/377 dead transitions. [2024-06-04 16:04:33,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 377 transitions, 5577 flow [2024-06-04 16:04:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:04:33,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 16:04:33,866 INFO L175 Difference]: Start difference. First operand has 299 places, 346 transitions, 4491 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:04:33,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 377 transitions, 5577 flow [2024-06-04 16:04:35,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 377 transitions, 5129 flow, removed 35 selfloop flow, removed 9 redundant places. [2024-06-04 16:04:35,138 INFO L231 Difference]: Finished difference. Result has 298 places, 353 transitions, 4357 flow [2024-06-04 16:04:35,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4043, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4357, PETRI_PLACES=298, PETRI_TRANSITIONS=353} [2024-06-04 16:04:35,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-04 16:04:35,142 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 353 transitions, 4357 flow [2024-06-04 16:04:35,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:35,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:35,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:35,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-04 16:04:35,142 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:35,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:35,142 INFO L85 PathProgramCache]: Analyzing trace with hash -163079792, now seen corresponding path program 2 times [2024-06-04 16:04:35,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:35,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243115884] [2024-06-04 16:04:35,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:35,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:35,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:35,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:35,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243115884] [2024-06-04 16:04:35,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243115884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:35,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:35,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:35,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830154125] [2024-06-04 16:04:35,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:35,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:35,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:35,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:35,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:35,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:35,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 353 transitions, 4357 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:35,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:35,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:35,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:36,405 INFO L124 PetriNetUnfolderBase]: 3045/5185 cut-off events. [2024-06-04 16:04:36,405 INFO L125 PetriNetUnfolderBase]: For 320643/320643 co-relation queries the response was YES. [2024-06-04 16:04:36,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34230 conditions, 5185 events. 3045/5185 cut-off events. For 320643/320643 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35060 event pairs, 651 based on Foata normal form. 1/5181 useless extension candidates. Maximal degree in co-relation 34089. Up to 4671 conditions per place. [2024-06-04 16:04:36,469 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 52 changer transitions 0/379 dead transitions. [2024-06-04 16:04:36,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 379 transitions, 5256 flow [2024-06-04 16:04:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:36,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:36,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:04:36,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 16:04:36,480 INFO L175 Difference]: Start difference. First operand has 298 places, 353 transitions, 4357 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:04:36,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 379 transitions, 5256 flow [2024-06-04 16:04:37,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 379 transitions, 5087 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-04 16:04:37,737 INFO L231 Difference]: Finished difference. Result has 301 places, 359 transitions, 4413 flow [2024-06-04 16:04:37,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4215, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4413, PETRI_PLACES=301, PETRI_TRANSITIONS=359} [2024-06-04 16:04:37,738 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-04 16:04:37,738 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 359 transitions, 4413 flow [2024-06-04 16:04:37,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:37,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:37,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:37,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-04 16:04:37,739 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:37,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:37,739 INFO L85 PathProgramCache]: Analyzing trace with hash -363052152, now seen corresponding path program 1 times [2024-06-04 16:04:37,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:37,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094831495] [2024-06-04 16:04:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:37,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:37,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:37,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:38,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094831495] [2024-06-04 16:04:38,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094831495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:38,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:38,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:38,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44516870] [2024-06-04 16:04:38,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:38,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:38,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:38,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:38,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:38,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 359 transitions, 4413 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:38,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:38,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:38,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:38,873 INFO L124 PetriNetUnfolderBase]: 3058/5199 cut-off events. [2024-06-04 16:04:38,873 INFO L125 PetriNetUnfolderBase]: For 316017/316017 co-relation queries the response was YES. [2024-06-04 16:04:38,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34280 conditions, 5199 events. 3058/5199 cut-off events. For 316017/316017 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 35178 event pairs, 669 based on Foata normal form. 1/5191 useless extension candidates. Maximal degree in co-relation 34138. Up to 4619 conditions per place. [2024-06-04 16:04:38,935 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 301 selfloop transitions, 71 changer transitions 0/379 dead transitions. [2024-06-04 16:04:38,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 379 transitions, 5387 flow [2024-06-04 16:04:38,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:04:38,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:04:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:04:38,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:04:38,936 INFO L175 Difference]: Start difference. First operand has 301 places, 359 transitions, 4413 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:04:38,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 379 transitions, 5387 flow [2024-06-04 16:04:39,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 379 transitions, 5289 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-04 16:04:39,937 INFO L231 Difference]: Finished difference. Result has 304 places, 365 transitions, 4523 flow [2024-06-04 16:04:39,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4315, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4523, PETRI_PLACES=304, PETRI_TRANSITIONS=365} [2024-06-04 16:04:39,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-04 16:04:39,938 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 365 transitions, 4523 flow [2024-06-04 16:04:39,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:39,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:39,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:39,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-04 16:04:39,938 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:39,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:39,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1640477098, now seen corresponding path program 3 times [2024-06-04 16:04:39,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:39,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898767688] [2024-06-04 16:04:39,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:39,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:40,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:40,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898767688] [2024-06-04 16:04:40,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898767688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:40,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:40,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:40,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54897156] [2024-06-04 16:04:40,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:40,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:40,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:40,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:40,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:40,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:40,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 365 transitions, 4523 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:40,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:40,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:40,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:41,184 INFO L124 PetriNetUnfolderBase]: 3073/5232 cut-off events. [2024-06-04 16:04:41,185 INFO L125 PetriNetUnfolderBase]: For 323681/323681 co-relation queries the response was YES. [2024-06-04 16:04:41,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34646 conditions, 5232 events. 3073/5232 cut-off events. For 323681/323681 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 35406 event pairs, 650 based on Foata normal form. 1/5228 useless extension candidates. Maximal degree in co-relation 34503. Up to 4725 conditions per place. [2024-06-04 16:04:41,253 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 348 selfloop transitions, 49 changer transitions 0/404 dead transitions. [2024-06-04 16:04:41,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 404 transitions, 5522 flow [2024-06-04 16:04:41,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:04:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:04:41,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 246 transitions. [2024-06-04 16:04:41,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5324675324675324 [2024-06-04 16:04:41,255 INFO L175 Difference]: Start difference. First operand has 304 places, 365 transitions, 4523 flow. Second operand 11 states and 246 transitions. [2024-06-04 16:04:41,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 404 transitions, 5522 flow [2024-06-04 16:04:42,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 404 transitions, 5475 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-04 16:04:42,506 INFO L231 Difference]: Finished difference. Result has 313 places, 374 transitions, 4717 flow [2024-06-04 16:04:42,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4478, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4717, PETRI_PLACES=313, PETRI_TRANSITIONS=374} [2024-06-04 16:04:42,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-04 16:04:42,506 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 374 transitions, 4717 flow [2024-06-04 16:04:42,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:42,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:42,507 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] [2024-06-04 16:04:42,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-04 16:04:42,507 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:42,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:42,507 INFO L85 PathProgramCache]: Analyzing trace with hash 14051914, now seen corresponding path program 2 times [2024-06-04 16:04:42,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:42,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622435163] [2024-06-04 16:04:42,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:42,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:42,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:42,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:42,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622435163] [2024-06-04 16:04:42,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622435163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:42,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:42,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:42,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159476757] [2024-06-04 16:04:42,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:42,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:42,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:42,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:42,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:42,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:42,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 374 transitions, 4717 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:42,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:42,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:42,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:43,688 INFO L124 PetriNetUnfolderBase]: 3078/5227 cut-off events. [2024-06-04 16:04:43,688 INFO L125 PetriNetUnfolderBase]: For 332016/332016 co-relation queries the response was YES. [2024-06-04 16:04:43,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34918 conditions, 5227 events. 3078/5227 cut-off events. For 332016/332016 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 35354 event pairs, 668 based on Foata normal form. 1/5219 useless extension candidates. Maximal degree in co-relation 34773. Up to 4638 conditions per place. [2024-06-04 16:04:43,756 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 302 selfloop transitions, 81 changer transitions 0/390 dead transitions. [2024-06-04 16:04:43,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 390 transitions, 5698 flow [2024-06-04 16:04:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:04:43,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:04:43,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-04 16:04:43,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-04 16:04:43,757 INFO L175 Difference]: Start difference. First operand has 313 places, 374 transitions, 4717 flow. Second operand 5 states and 127 transitions. [2024-06-04 16:04:43,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 390 transitions, 5698 flow [2024-06-04 16:04:44,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 390 transitions, 5520 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:44,842 INFO L231 Difference]: Finished difference. Result has 310 places, 377 transitions, 4757 flow [2024-06-04 16:04:44,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4539, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4757, PETRI_PLACES=310, PETRI_TRANSITIONS=377} [2024-06-04 16:04:44,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-04 16:04:44,843 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 377 transitions, 4757 flow [2024-06-04 16:04:44,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:44,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:44,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:44,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-04 16:04:44,843 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:44,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:44,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1640714434, now seen corresponding path program 3 times [2024-06-04 16:04:44,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:44,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502509961] [2024-06-04 16:04:44,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:44,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:45,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:45,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502509961] [2024-06-04 16:04:45,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502509961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:45,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:45,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:04:45,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001201213] [2024-06-04 16:04:45,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:45,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:04:45,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:45,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:04:45,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:04:45,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:45,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 377 transitions, 4757 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:45,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:45,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:45,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:46,078 INFO L124 PetriNetUnfolderBase]: 3075/5223 cut-off events. [2024-06-04 16:04:46,079 INFO L125 PetriNetUnfolderBase]: For 336745/336745 co-relation queries the response was YES. [2024-06-04 16:04:46,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34976 conditions, 5223 events. 3075/5223 cut-off events. For 336745/336745 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 35328 event pairs, 665 based on Foata normal form. 1/5215 useless extension candidates. Maximal degree in co-relation 34830. Up to 4635 conditions per place. [2024-06-04 16:04:46,151 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 296 selfloop transitions, 88 changer transitions 0/391 dead transitions. [2024-06-04 16:04:46,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 391 transitions, 5559 flow [2024-06-04 16:04:46,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:04:46,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:04:46,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-04 16:04:46,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-04 16:04:46,153 INFO L175 Difference]: Start difference. First operand has 310 places, 377 transitions, 4757 flow. Second operand 7 states and 166 transitions. [2024-06-04 16:04:46,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 391 transitions, 5559 flow [2024-06-04 16:04:47,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 391 transitions, 5442 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-04 16:04:47,382 INFO L231 Difference]: Finished difference. Result has 313 places, 377 transitions, 4827 flow [2024-06-04 16:04:47,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4640, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4827, PETRI_PLACES=313, PETRI_TRANSITIONS=377} [2024-06-04 16:04:47,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-04 16:04:47,382 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 377 transitions, 4827 flow [2024-06-04 16:04:47,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:47,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:47,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:47,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-04 16:04:47,383 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:47,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:47,383 INFO L85 PathProgramCache]: Analyzing trace with hash 623824624, now seen corresponding path program 4 times [2024-06-04 16:04:47,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:47,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167562563] [2024-06-04 16:04:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:47,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:47,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:47,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:47,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167562563] [2024-06-04 16:04:47,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167562563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:47,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:47,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:47,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335827901] [2024-06-04 16:04:47,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:47,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:47,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:47,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:47,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:47,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:47,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 377 transitions, 4827 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:47,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:47,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:47,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:48,651 INFO L124 PetriNetUnfolderBase]: 3120/5313 cut-off events. [2024-06-04 16:04:48,652 INFO L125 PetriNetUnfolderBase]: For 345552/345555 co-relation queries the response was YES. [2024-06-04 16:04:48,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35875 conditions, 5313 events. 3120/5313 cut-off events. For 345552/345555 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 36024 event pairs, 682 based on Foata normal form. 1/5303 useless extension candidates. Maximal degree in co-relation 35730. Up to 4374 conditions per place. [2024-06-04 16:04:48,725 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 230 selfloop transitions, 200 changer transitions 0/437 dead transitions. [2024-06-04 16:04:48,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 437 transitions, 6575 flow [2024-06-04 16:04:48,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:04:48,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:04:48,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 274 transitions. [2024-06-04 16:04:48,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5930735930735931 [2024-06-04 16:04:48,736 INFO L175 Difference]: Start difference. First operand has 313 places, 377 transitions, 4827 flow. Second operand 11 states and 274 transitions. [2024-06-04 16:04:48,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 437 transitions, 6575 flow [2024-06-04 16:04:49,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 437 transitions, 6327 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:49,794 INFO L231 Difference]: Finished difference. Result has 317 places, 392 transitions, 5313 flow [2024-06-04 16:04:49,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4585, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5313, PETRI_PLACES=317, PETRI_TRANSITIONS=392} [2024-06-04 16:04:49,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-04 16:04:49,795 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 392 transitions, 5313 flow [2024-06-04 16:04:49,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:49,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:49,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:49,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-04 16:04:49,796 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:49,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:49,803 INFO L85 PathProgramCache]: Analyzing trace with hash -123876958, now seen corresponding path program 5 times [2024-06-04 16:04:49,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:49,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538617095] [2024-06-04 16:04:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:49,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:50,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:50,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:50,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538617095] [2024-06-04 16:04:50,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538617095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:50,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:50,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:50,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138067336] [2024-06-04 16:04:50,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:50,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:50,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:50,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:50,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:50,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:50,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 392 transitions, 5313 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:50,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:50,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:50,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:51,047 INFO L124 PetriNetUnfolderBase]: 3133/5327 cut-off events. [2024-06-04 16:04:51,048 INFO L125 PetriNetUnfolderBase]: For 354117/354120 co-relation queries the response was YES. [2024-06-04 16:04:51,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37097 conditions, 5327 events. 3133/5327 cut-off events. For 354117/354120 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 36137 event pairs, 676 based on Foata normal form. 1/5317 useless extension candidates. Maximal degree in co-relation 36952. Up to 4311 conditions per place. [2024-06-04 16:04:51,123 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 222 changer transitions 0/446 dead transitions. [2024-06-04 16:04:51,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 446 transitions, 7115 flow [2024-06-04 16:04:51,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:04:51,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:04:51,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 308 transitions. [2024-06-04 16:04:51,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5641025641025641 [2024-06-04 16:04:51,124 INFO L175 Difference]: Start difference. First operand has 317 places, 392 transitions, 5313 flow. Second operand 13 states and 308 transitions. [2024-06-04 16:04:51,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 446 transitions, 7115 flow [2024-06-04 16:04:52,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 446 transitions, 6567 flow, removed 130 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:52,255 INFO L231 Difference]: Finished difference. Result has 324 places, 401 transitions, 5459 flow [2024-06-04 16:04:52,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4833, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5459, PETRI_PLACES=324, PETRI_TRANSITIONS=401} [2024-06-04 16:04:52,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-04 16:04:52,256 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 401 transitions, 5459 flow [2024-06-04 16:04:52,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:52,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:52,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:52,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-04 16:04:52,256 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:52,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:52,256 INFO L85 PathProgramCache]: Analyzing trace with hash -884140788, now seen corresponding path program 6 times [2024-06-04 16:04:52,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:52,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321340765] [2024-06-04 16:04:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:52,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:52,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:52,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321340765] [2024-06-04 16:04:52,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321340765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:52,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:52,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009248494] [2024-06-04 16:04:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:52,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:52,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:52,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:52,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:52,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:52,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 401 transitions, 5459 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:52,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:52,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:52,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:53,534 INFO L124 PetriNetUnfolderBase]: 3130/5327 cut-off events. [2024-06-04 16:04:53,535 INFO L125 PetriNetUnfolderBase]: For 359229/359232 co-relation queries the response was YES. [2024-06-04 16:04:53,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37461 conditions, 5327 events. 3130/5327 cut-off events. For 359229/359232 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 36126 event pairs, 678 based on Foata normal form. 1/5317 useless extension candidates. Maximal degree in co-relation 37315. Up to 4309 conditions per place. [2024-06-04 16:04:53,615 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 227 selfloop transitions, 211 changer transitions 0/445 dead transitions. [2024-06-04 16:04:53,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 445 transitions, 7223 flow [2024-06-04 16:04:53,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:04:53,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:04:53,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 276 transitions. [2024-06-04 16:04:53,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5974025974025974 [2024-06-04 16:04:53,617 INFO L175 Difference]: Start difference. First operand has 324 places, 401 transitions, 5459 flow. Second operand 11 states and 276 transitions. [2024-06-04 16:04:53,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 445 transitions, 7223 flow [2024-06-04 16:04:54,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 445 transitions, 6840 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-04 16:04:54,867 INFO L231 Difference]: Finished difference. Result has 328 places, 401 transitions, 5504 flow [2024-06-04 16:04:54,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5076, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5504, PETRI_PLACES=328, PETRI_TRANSITIONS=401} [2024-06-04 16:04:54,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-04 16:04:54,870 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 401 transitions, 5504 flow [2024-06-04 16:04:54,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:54,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:54,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:54,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-04 16:04:54,871 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:54,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:54,871 INFO L85 PathProgramCache]: Analyzing trace with hash -333534112, now seen corresponding path program 4 times [2024-06-04 16:04:54,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:54,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241406685] [2024-06-04 16:04:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:54,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:55,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:55,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241406685] [2024-06-04 16:04:55,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241406685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:55,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:55,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:04:55,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334876132] [2024-06-04 16:04:55,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:55,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:04:55,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:55,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:04:55,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:04:55,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:55,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 401 transitions, 5504 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:55,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:55,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:55,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:56,087 INFO L124 PetriNetUnfolderBase]: 3145/5355 cut-off events. [2024-06-04 16:04:56,088 INFO L125 PetriNetUnfolderBase]: For 367894/367894 co-relation queries the response was YES. [2024-06-04 16:04:56,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37765 conditions, 5355 events. 3145/5355 cut-off events. For 367894/367894 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 36478 event pairs, 659 based on Foata normal form. 1/5350 useless extension candidates. Maximal degree in co-relation 37618. Up to 4669 conditions per place. [2024-06-04 16:04:56,158 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 336 selfloop transitions, 96 changer transitions 0/439 dead transitions. [2024-06-04 16:04:56,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 439 transitions, 6704 flow [2024-06-04 16:04:56,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:04:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:04:56,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-04 16:04:56,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-04 16:04:56,160 INFO L175 Difference]: Start difference. First operand has 328 places, 401 transitions, 5504 flow. Second operand 9 states and 213 transitions. [2024-06-04 16:04:56,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 439 transitions, 6704 flow [2024-06-04 16:04:57,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 439 transitions, 6260 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 16:04:57,392 INFO L231 Difference]: Finished difference. Result has 330 places, 410 transitions, 5377 flow [2024-06-04 16:04:57,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5073, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5377, PETRI_PLACES=330, PETRI_TRANSITIONS=410} [2024-06-04 16:04:57,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-04 16:04:57,393 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 410 transitions, 5377 flow [2024-06-04 16:04:57,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:57,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:04:57,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:04:57,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-04 16:04:57,394 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:04:57,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:04:57,394 INFO L85 PathProgramCache]: Analyzing trace with hash -985610834, now seen corresponding path program 7 times [2024-06-04 16:04:57,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:04:57,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135548057] [2024-06-04 16:04:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:04:57,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:04:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:04:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:04:57,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:04:57,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135548057] [2024-06-04 16:04:57,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135548057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:04:57,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:04:57,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:04:57,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215635552] [2024-06-04 16:04:57,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:04:57,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:04:57,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:04:57,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:04:57,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:04:57,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:04:57,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 410 transitions, 5377 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:04:57,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:04:57,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:04:57,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:04:58,761 INFO L124 PetriNetUnfolderBase]: 3150/5363 cut-off events. [2024-06-04 16:04:58,761 INFO L125 PetriNetUnfolderBase]: For 375669/375672 co-relation queries the response was YES. [2024-06-04 16:04:58,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37496 conditions, 5363 events. 3150/5363 cut-off events. For 375669/375672 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 36506 event pairs, 659 based on Foata normal form. 3/5359 useless extension candidates. Maximal degree in co-relation 37348. Up to 4708 conditions per place. [2024-06-04 16:04:58,836 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 340 selfloop transitions, 101 changer transitions 0/448 dead transitions. [2024-06-04 16:04:58,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 448 transitions, 6393 flow [2024-06-04 16:04:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:04:58,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:04:58,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-04 16:04:58,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:04:58,838 INFO L175 Difference]: Start difference. First operand has 330 places, 410 transitions, 5377 flow. Second operand 10 states and 240 transitions. [2024-06-04 16:04:58,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 448 transitions, 6393 flow [2024-06-04 16:05:00,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 448 transitions, 6176 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-04 16:05:00,104 INFO L231 Difference]: Finished difference. Result has 335 places, 413 transitions, 5420 flow [2024-06-04 16:05:00,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5160, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5420, PETRI_PLACES=335, PETRI_TRANSITIONS=413} [2024-06-04 16:05:00,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-04 16:05:00,104 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 413 transitions, 5420 flow [2024-06-04 16:05:00,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:00,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:00,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:00,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-04 16:05:00,105 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:00,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:00,105 INFO L85 PathProgramCache]: Analyzing trace with hash -522698104, now seen corresponding path program 5 times [2024-06-04 16:05:00,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:00,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211298978] [2024-06-04 16:05:00,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:00,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:00,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:00,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:00,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211298978] [2024-06-04 16:05:00,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211298978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:00,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:00,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:00,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960966559] [2024-06-04 16:05:00,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:00,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:00,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:00,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:00,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:00,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:00,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 413 transitions, 5420 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:00,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:00,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:00,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:01,356 INFO L124 PetriNetUnfolderBase]: 3178/5409 cut-off events. [2024-06-04 16:05:01,356 INFO L125 PetriNetUnfolderBase]: For 387458/387458 co-relation queries the response was YES. [2024-06-04 16:05:01,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37796 conditions, 5409 events. 3178/5409 cut-off events. For 387458/387458 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 36867 event pairs, 657 based on Foata normal form. 1/5404 useless extension candidates. Maximal degree in co-relation 37648. Up to 4705 conditions per place. [2024-06-04 16:05:01,426 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 119 changer transitions 0/455 dead transitions. [2024-06-04 16:05:01,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 455 transitions, 6863 flow [2024-06-04 16:05:01,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:05:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:05:01,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 249 transitions. [2024-06-04 16:05:01,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-06-04 16:05:01,427 INFO L175 Difference]: Start difference. First operand has 335 places, 413 transitions, 5420 flow. Second operand 11 states and 249 transitions. [2024-06-04 16:05:01,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 455 transitions, 6863 flow [2024-06-04 16:05:02,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 455 transitions, 6623 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:02,750 INFO L231 Difference]: Finished difference. Result has 340 places, 426 transitions, 5603 flow [2024-06-04 16:05:02,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5196, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5603, PETRI_PLACES=340, PETRI_TRANSITIONS=426} [2024-06-04 16:05:02,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-04 16:05:02,751 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 426 transitions, 5603 flow [2024-06-04 16:05:02,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:02,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:02,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:02,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-04 16:05:02,751 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:02,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:02,752 INFO L85 PathProgramCache]: Analyzing trace with hash -660662324, now seen corresponding path program 8 times [2024-06-04 16:05:02,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:02,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239020900] [2024-06-04 16:05:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:02,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:03,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:03,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239020900] [2024-06-04 16:05:03,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239020900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:03,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:03,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:03,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686985926] [2024-06-04 16:05:03,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:03,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:03,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:03,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:03,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:03,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:03,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 426 transitions, 5603 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:03,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:03,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:03,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:04,060 INFO L124 PetriNetUnfolderBase]: 3191/5438 cut-off events. [2024-06-04 16:05:04,060 INFO L125 PetriNetUnfolderBase]: For 399608/399611 co-relation queries the response was YES. [2024-06-04 16:05:04,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38170 conditions, 5438 events. 3191/5438 cut-off events. For 399608/399611 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 37118 event pairs, 661 based on Foata normal form. 3/5434 useless extension candidates. Maximal degree in co-relation 38020. Up to 4749 conditions per place. [2024-06-04 16:05:04,255 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 337 selfloop transitions, 122 changer transitions 0/466 dead transitions. [2024-06-04 16:05:04,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 466 transitions, 6864 flow [2024-06-04 16:05:04,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:05:04,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:05:04,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-04 16:05:04,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551948051948052 [2024-06-04 16:05:04,257 INFO L175 Difference]: Start difference. First operand has 340 places, 426 transitions, 5603 flow. Second operand 11 states and 255 transitions. [2024-06-04 16:05:04,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 466 transitions, 6864 flow [2024-06-04 16:05:05,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 466 transitions, 6688 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-04 16:05:05,627 INFO L231 Difference]: Finished difference. Result has 346 places, 432 transitions, 5800 flow [2024-06-04 16:05:05,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5800, PETRI_PLACES=346, PETRI_TRANSITIONS=432} [2024-06-04 16:05:05,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-04 16:05:05,627 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 432 transitions, 5800 flow [2024-06-04 16:05:05,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:05,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:05,627 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] [2024-06-04 16:05:05,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-04 16:05:05,628 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:05,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:05,628 INFO L85 PathProgramCache]: Analyzing trace with hash 280566160, now seen corresponding path program 9 times [2024-06-04 16:05:05,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:05,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292652189] [2024-06-04 16:05:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:05,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:05,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:05,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292652189] [2024-06-04 16:05:05,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292652189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:05,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:05,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:05,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19430026] [2024-06-04 16:05:05,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:05,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:05,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:05,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:05,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:05,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:05,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 432 transitions, 5800 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:05,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:05,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:05,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:06,978 INFO L124 PetriNetUnfolderBase]: 3188/5434 cut-off events. [2024-06-04 16:05:06,978 INFO L125 PetriNetUnfolderBase]: For 405309/405312 co-relation queries the response was YES. [2024-06-04 16:05:07,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38272 conditions, 5434 events. 3188/5434 cut-off events. For 405309/405312 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 37158 event pairs, 661 based on Foata normal form. 3/5430 useless extension candidates. Maximal degree in co-relation 38120. Up to 4704 conditions per place. [2024-06-04 16:05:07,054 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 145 changer transitions 0/469 dead transitions. [2024-06-04 16:05:07,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 469 transitions, 6980 flow [2024-06-04 16:05:07,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:05:07,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:05:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 310 transitions. [2024-06-04 16:05:07,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-04 16:05:07,056 INFO L175 Difference]: Start difference. First operand has 346 places, 432 transitions, 5800 flow. Second operand 14 states and 310 transitions. [2024-06-04 16:05:07,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 469 transitions, 6980 flow [2024-06-04 16:05:08,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 469 transitions, 6737 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-04 16:05:08,706 INFO L231 Difference]: Finished difference. Result has 354 places, 432 transitions, 5853 flow [2024-06-04 16:05:08,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5557, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5853, PETRI_PLACES=354, PETRI_TRANSITIONS=432} [2024-06-04 16:05:08,706 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-04 16:05:08,706 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 432 transitions, 5853 flow [2024-06-04 16:05:08,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:08,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:08,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:08,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-04 16:05:08,707 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:08,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:08,707 INFO L85 PathProgramCache]: Analyzing trace with hash 280566346, now seen corresponding path program 6 times [2024-06-04 16:05:08,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:08,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890360883] [2024-06-04 16:05:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:08,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:08,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:08,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890360883] [2024-06-04 16:05:08,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890360883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:08,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:08,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:08,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579659781] [2024-06-04 16:05:08,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:08,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:08,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:08,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:08,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:08,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:08,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 432 transitions, 5853 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:08,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:08,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:08,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:09,980 INFO L124 PetriNetUnfolderBase]: 3185/5427 cut-off events. [2024-06-04 16:05:09,980 INFO L125 PetriNetUnfolderBase]: For 410309/410309 co-relation queries the response was YES. [2024-06-04 16:05:10,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38313 conditions, 5427 events. 3185/5427 cut-off events. For 410309/410309 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 37086 event pairs, 659 based on Foata normal form. 1/5422 useless extension candidates. Maximal degree in co-relation 38160. Up to 4716 conditions per place. [2024-06-04 16:05:10,050 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 341 selfloop transitions, 111 changer transitions 0/459 dead transitions. [2024-06-04 16:05:10,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 459 transitions, 6991 flow [2024-06-04 16:05:10,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:05:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:05:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-04 16:05:10,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:05:10,051 INFO L175 Difference]: Start difference. First operand has 354 places, 432 transitions, 5853 flow. Second operand 10 states and 230 transitions. [2024-06-04 16:05:10,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 459 transitions, 6991 flow [2024-06-04 16:05:11,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 459 transitions, 6667 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-04 16:05:11,455 INFO L231 Difference]: Finished difference. Result has 351 places, 432 transitions, 5758 flow [2024-06-04 16:05:11,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5529, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5758, PETRI_PLACES=351, PETRI_TRANSITIONS=432} [2024-06-04 16:05:11,456 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-04 16:05:11,456 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 432 transitions, 5758 flow [2024-06-04 16:05:11,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:11,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:11,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:11,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-04 16:05:11,457 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:11,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:11,457 INFO L85 PathProgramCache]: Analyzing trace with hash -123928070, now seen corresponding path program 7 times [2024-06-04 16:05:11,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:11,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189377842] [2024-06-04 16:05:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:11,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:11,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:11,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:11,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:11,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189377842] [2024-06-04 16:05:11,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189377842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:11,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:11,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:11,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15301011] [2024-06-04 16:05:11,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:11,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:11,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:11,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:11,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:11,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:11,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 432 transitions, 5758 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:11,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:11,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:11,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:12,731 INFO L124 PetriNetUnfolderBase]: 3190/5433 cut-off events. [2024-06-04 16:05:12,731 INFO L125 PetriNetUnfolderBase]: For 420153/420156 co-relation queries the response was YES. [2024-06-04 16:05:12,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38365 conditions, 5433 events. 3190/5433 cut-off events. For 420153/420156 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 37155 event pairs, 678 based on Foata normal form. 3/5428 useless extension candidates. Maximal degree in co-relation 38211. Up to 4722 conditions per place. [2024-06-04 16:05:12,806 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 324 selfloop transitions, 124 changer transitions 0/455 dead transitions. [2024-06-04 16:05:12,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 455 transitions, 6911 flow [2024-06-04 16:05:12,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:05:12,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:05:12,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-04 16:05:12,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-04 16:05:12,807 INFO L175 Difference]: Start difference. First operand has 351 places, 432 transitions, 5758 flow. Second operand 9 states and 203 transitions. [2024-06-04 16:05:12,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 455 transitions, 6911 flow [2024-06-04 16:05:14,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 455 transitions, 6707 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:14,580 INFO L231 Difference]: Finished difference. Result has 353 places, 435 transitions, 5847 flow [2024-06-04 16:05:14,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5560, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5847, PETRI_PLACES=353, PETRI_TRANSITIONS=435} [2024-06-04 16:05:14,581 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-04 16:05:14,581 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 435 transitions, 5847 flow [2024-06-04 16:05:14,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:14,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:14,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:14,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-04 16:05:14,582 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:14,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:14,582 INFO L85 PathProgramCache]: Analyzing trace with hash -289619670, now seen corresponding path program 10 times [2024-06-04 16:05:14,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:14,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879814001] [2024-06-04 16:05:14,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:14,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:14,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:14,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:14,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:14,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879814001] [2024-06-04 16:05:14,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879814001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:14,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:14,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:14,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851691101] [2024-06-04 16:05:14,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:14,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:14,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:14,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:14,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:14,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:14,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 435 transitions, 5847 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:14,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:14,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:14,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:15,883 INFO L124 PetriNetUnfolderBase]: 3239/5521 cut-off events. [2024-06-04 16:05:15,884 INFO L125 PetriNetUnfolderBase]: For 440688/440691 co-relation queries the response was YES. [2024-06-04 16:05:15,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39337 conditions, 5521 events. 3239/5521 cut-off events. For 440688/440691 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 37879 event pairs, 661 based on Foata normal form. 3/5517 useless extension candidates. Maximal degree in co-relation 39183. Up to 4783 conditions per place. [2024-06-04 16:05:15,967 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 329 selfloop transitions, 153 changer transitions 0/489 dead transitions. [2024-06-04 16:05:15,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 489 transitions, 7653 flow [2024-06-04 16:05:15,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:05:15,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:05:15,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-06-04 16:05:15,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5297619047619048 [2024-06-04 16:05:15,968 INFO L175 Difference]: Start difference. First operand has 353 places, 435 transitions, 5847 flow. Second operand 12 states and 267 transitions. [2024-06-04 16:05:15,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 489 transitions, 7653 flow [2024-06-04 16:05:17,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 489 transitions, 7368 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:17,865 INFO L231 Difference]: Finished difference. Result has 361 places, 459 transitions, 6396 flow [2024-06-04 16:05:17,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5584, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6396, PETRI_PLACES=361, PETRI_TRANSITIONS=459} [2024-06-04 16:05:17,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-04 16:05:17,866 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 459 transitions, 6396 flow [2024-06-04 16:05:17,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:17,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:17,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:17,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-04 16:05:17,867 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:17,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:17,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1702080362, now seen corresponding path program 8 times [2024-06-04 16:05:17,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:17,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649893282] [2024-06-04 16:05:17,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:17,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:18,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:18,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:18,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649893282] [2024-06-04 16:05:18,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649893282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:18,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:18,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:18,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667235647] [2024-06-04 16:05:18,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:18,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:18,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:18,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:18,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:18,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:18,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 459 transitions, 6396 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:18,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:18,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:18,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:19,204 INFO L124 PetriNetUnfolderBase]: 3244/5523 cut-off events. [2024-06-04 16:05:19,204 INFO L125 PetriNetUnfolderBase]: For 450494/450494 co-relation queries the response was YES. [2024-06-04 16:05:19,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39695 conditions, 5523 events. 3244/5523 cut-off events. For 450494/450494 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 37853 event pairs, 657 based on Foata normal form. 1/5518 useless extension candidates. Maximal degree in co-relation 39537. Up to 4782 conditions per place. [2024-06-04 16:05:19,278 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 358 selfloop transitions, 125 changer transitions 0/490 dead transitions. [2024-06-04 16:05:19,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 490 transitions, 7639 flow [2024-06-04 16:05:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:05:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:05:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:05:19,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-04 16:05:19,280 INFO L175 Difference]: Start difference. First operand has 361 places, 459 transitions, 6396 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:05:19,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 490 transitions, 7639 flow [2024-06-04 16:05:21,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 490 transitions, 7386 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-04 16:05:21,397 INFO L231 Difference]: Finished difference. Result has 364 places, 462 transitions, 6445 flow [2024-06-04 16:05:21,397 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6143, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6445, PETRI_PLACES=364, PETRI_TRANSITIONS=462} [2024-06-04 16:05:21,397 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-04 16:05:21,397 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 462 transitions, 6445 flow [2024-06-04 16:05:21,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:21,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:21,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:21,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-04 16:05:21,398 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:21,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:21,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2135024408, now seen corresponding path program 11 times [2024-06-04 16:05:21,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:21,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695381200] [2024-06-04 16:05:21,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:21,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:21,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:21,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695381200] [2024-06-04 16:05:21,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695381200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:21,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:21,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:21,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330642091] [2024-06-04 16:05:21,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:21,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:21,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:21,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:21,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:21,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:21,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 462 transitions, 6445 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:21,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:21,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:21,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:22,711 INFO L124 PetriNetUnfolderBase]: 3241/5522 cut-off events. [2024-06-04 16:05:22,712 INFO L125 PetriNetUnfolderBase]: For 456242/456242 co-relation queries the response was YES. [2024-06-04 16:05:22,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39640 conditions, 5522 events. 3241/5522 cut-off events. For 456242/456242 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 37809 event pairs, 648 based on Foata normal form. 1/5518 useless extension candidates. Maximal degree in co-relation 39481. Up to 4965 conditions per place. [2024-06-04 16:05:22,786 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 423 selfloop transitions, 49 changer transitions 0/479 dead transitions. [2024-06-04 16:05:22,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 479 transitions, 7431 flow [2024-06-04 16:05:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:05:22,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:05:22,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-04 16:05:22,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-04 16:05:22,788 INFO L175 Difference]: Start difference. First operand has 364 places, 462 transitions, 6445 flow. Second operand 7 states and 165 transitions. [2024-06-04 16:05:22,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 479 transitions, 7431 flow [2024-06-04 16:05:24,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 479 transitions, 7226 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:24,852 INFO L231 Difference]: Finished difference. Result has 364 places, 462 transitions, 6352 flow [2024-06-04 16:05:24,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6240, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6352, PETRI_PLACES=364, PETRI_TRANSITIONS=462} [2024-06-04 16:05:24,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-04 16:05:24,853 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 462 transitions, 6352 flow [2024-06-04 16:05:24,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:24,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:24,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:24,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-04 16:05:24,853 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:24,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:24,854 INFO L85 PathProgramCache]: Analyzing trace with hash 446205294, now seen corresponding path program 12 times [2024-06-04 16:05:24,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:24,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829843688] [2024-06-04 16:05:24,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:24,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:25,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:25,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:25,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829843688] [2024-06-04 16:05:25,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829843688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:25,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:25,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:25,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262187995] [2024-06-04 16:05:25,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:25,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:25,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:25,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:25,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:25,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:25,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 462 transitions, 6352 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:25,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:25,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:25,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:26,246 INFO L124 PetriNetUnfolderBase]: 3238/5522 cut-off events. [2024-06-04 16:05:26,247 INFO L125 PetriNetUnfolderBase]: For 442545/442548 co-relation queries the response was YES. [2024-06-04 16:05:26,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39239 conditions, 5522 events. 3238/5522 cut-off events. For 442545/442548 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 37851 event pairs, 661 based on Foata normal form. 3/5518 useless extension candidates. Maximal degree in co-relation 39081. Up to 4733 conditions per place. [2024-06-04 16:05:26,321 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 306 selfloop transitions, 182 changer transitions 0/495 dead transitions. [2024-06-04 16:05:26,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 495 transitions, 7754 flow [2024-06-04 16:05:26,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:05:26,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:05:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 322 transitions. [2024-06-04 16:05:26,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-04 16:05:26,322 INFO L175 Difference]: Start difference. First operand has 364 places, 462 transitions, 6352 flow. Second operand 15 states and 322 transitions. [2024-06-04 16:05:26,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 495 transitions, 7754 flow [2024-06-04 16:05:28,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 495 transitions, 7605 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-04 16:05:28,543 INFO L231 Difference]: Finished difference. Result has 375 places, 462 transitions, 6573 flow [2024-06-04 16:05:28,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6573, PETRI_PLACES=375, PETRI_TRANSITIONS=462} [2024-06-04 16:05:28,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-04 16:05:28,544 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 462 transitions, 6573 flow [2024-06-04 16:05:28,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:28,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:28,545 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] [2024-06-04 16:05:28,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-04 16:05:28,545 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:28,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:28,546 INFO L85 PathProgramCache]: Analyzing trace with hash 708174122, now seen corresponding path program 9 times [2024-06-04 16:05:28,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:28,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660660989] [2024-06-04 16:05:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:28,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:28,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:28,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660660989] [2024-06-04 16:05:28,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660660989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:28,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:28,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:28,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387031899] [2024-06-04 16:05:28,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:28,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:28,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:28,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:28,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:28,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:28,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 462 transitions, 6573 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:28,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:28,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:28,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:29,800 INFO L124 PetriNetUnfolderBase]: 3235/5511 cut-off events. [2024-06-04 16:05:29,800 INFO L125 PetriNetUnfolderBase]: For 448864/448864 co-relation queries the response was YES. [2024-06-04 16:05:29,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39479 conditions, 5511 events. 3235/5511 cut-off events. For 448864/448864 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 37771 event pairs, 657 based on Foata normal form. 1/5506 useless extension candidates. Maximal degree in co-relation 39322. Up to 4771 conditions per place. [2024-06-04 16:05:29,874 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 341 selfloop transitions, 139 changer transitions 0/487 dead transitions. [2024-06-04 16:05:29,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 487 transitions, 7595 flow [2024-06-04 16:05:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:05:29,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:05:29,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 16:05:29,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-04 16:05:29,875 INFO L175 Difference]: Start difference. First operand has 375 places, 462 transitions, 6573 flow. Second operand 9 states and 208 transitions. [2024-06-04 16:05:29,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 487 transitions, 7595 flow [2024-06-04 16:05:31,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 487 transitions, 7225 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-04 16:05:31,684 INFO L231 Difference]: Finished difference. Result has 371 places, 462 transitions, 6491 flow [2024-06-04 16:05:31,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6491, PETRI_PLACES=371, PETRI_TRANSITIONS=462} [2024-06-04 16:05:31,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-04 16:05:31,684 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 462 transitions, 6491 flow [2024-06-04 16:05:31,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:31,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:31,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:31,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-04 16:05:31,685 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:31,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:31,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1737121890, now seen corresponding path program 1 times [2024-06-04 16:05:31,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:31,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137329465] [2024-06-04 16:05:31,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:31,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:31,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:31,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:31,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:31,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137329465] [2024-06-04 16:05:31,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137329465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:31,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:31,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:05:31,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824689636] [2024-06-04 16:05:31,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:31,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:05:31,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:31,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:05:31,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:05:32,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:32,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 462 transitions, 6491 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:32,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:32,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:32,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:32,938 INFO L124 PetriNetUnfolderBase]: 3263/5554 cut-off events. [2024-06-04 16:05:32,938 INFO L125 PetriNetUnfolderBase]: For 479242/479242 co-relation queries the response was YES. [2024-06-04 16:05:32,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39734 conditions, 5554 events. 3263/5554 cut-off events. For 479242/479242 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 38128 event pairs, 566 based on Foata normal form. 6/5551 useless extension candidates. Maximal degree in co-relation 39576. Up to 4768 conditions per place. [2024-06-04 16:05:33,013 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 448 selfloop transitions, 33 changer transitions 0/488 dead transitions. [2024-06-04 16:05:33,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 488 transitions, 7796 flow [2024-06-04 16:05:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:05:33,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:05:33,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:05:33,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-04 16:05:33,014 INFO L175 Difference]: Start difference. First operand has 371 places, 462 transitions, 6491 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:05:33,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 488 transitions, 7796 flow [2024-06-04 16:05:34,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 488 transitions, 7429 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-04 16:05:34,637 INFO L231 Difference]: Finished difference. Result has 369 places, 465 transitions, 6240 flow [2024-06-04 16:05:34,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6126, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6240, PETRI_PLACES=369, PETRI_TRANSITIONS=465} [2024-06-04 16:05:34,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-04 16:05:34,638 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 465 transitions, 6240 flow [2024-06-04 16:05:34,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:34,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:34,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:34,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-04 16:05:34,639 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:34,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:34,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1676134228, now seen corresponding path program 2 times [2024-06-04 16:05:34,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:34,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400352208] [2024-06-04 16:05:34,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:34,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:34,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:34,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:34,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:34,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400352208] [2024-06-04 16:05:34,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400352208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:34,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:34,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:05:34,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041940099] [2024-06-04 16:05:34,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:34,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:05:34,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:34,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:05:34,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:05:34,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:34,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 465 transitions, 6240 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:34,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:34,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:34,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:35,978 INFO L124 PetriNetUnfolderBase]: 3250/5539 cut-off events. [2024-06-04 16:05:35,978 INFO L125 PetriNetUnfolderBase]: For 454431/454431 co-relation queries the response was YES. [2024-06-04 16:05:36,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38892 conditions, 5539 events. 3250/5539 cut-off events. For 454431/454431 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 38026 event pairs, 557 based on Foata normal form. 6/5536 useless extension candidates. Maximal degree in co-relation 38733. Up to 4762 conditions per place. [2024-06-04 16:05:36,045 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 445 selfloop transitions, 33 changer transitions 0/485 dead transitions. [2024-06-04 16:05:36,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 485 transitions, 7316 flow [2024-06-04 16:05:36,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-04 16:05:36,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-04 16:05:36,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-04 16:05:36,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-04 16:05:36,046 INFO L175 Difference]: Start difference. First operand has 369 places, 465 transitions, 6240 flow. Second operand 5 states and 126 transitions. [2024-06-04 16:05:36,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 485 transitions, 7316 flow [2024-06-04 16:05:37,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 485 transitions, 7238 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-04 16:05:37,712 INFO L231 Difference]: Finished difference. Result has 371 places, 465 transitions, 6234 flow [2024-06-04 16:05:37,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6162, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6234, PETRI_PLACES=371, PETRI_TRANSITIONS=465} [2024-06-04 16:05:37,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-04 16:05:37,713 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 465 transitions, 6234 flow [2024-06-04 16:05:37,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:37,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:37,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:37,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-04 16:05:37,713 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:37,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:37,714 INFO L85 PathProgramCache]: Analyzing trace with hash -778802518, now seen corresponding path program 1 times [2024-06-04 16:05:37,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:37,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640253116] [2024-06-04 16:05:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:37,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:37,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:37,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:37,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640253116] [2024-06-04 16:05:37,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640253116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:37,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:37,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:37,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316472504] [2024-06-04 16:05:37,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:37,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:37,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:37,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:37,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:38,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:38,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 465 transitions, 6234 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:38,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:38,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:38,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:39,063 INFO L124 PetriNetUnfolderBase]: 3343/5666 cut-off events. [2024-06-04 16:05:39,064 INFO L125 PetriNetUnfolderBase]: For 509652/509655 co-relation queries the response was YES. [2024-06-04 16:05:39,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41553 conditions, 5666 events. 3343/5666 cut-off events. For 509652/509655 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38831 event pairs, 678 based on Foata normal form. 2/5646 useless extension candidates. Maximal degree in co-relation 41394. Up to 4823 conditions per place. [2024-06-04 16:05:39,145 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 361 selfloop transitions, 138 changer transitions 0/506 dead transitions. [2024-06-04 16:05:39,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 506 transitions, 7755 flow [2024-06-04 16:05:39,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:05:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:05:39,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 16:05:39,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:05:39,146 INFO L175 Difference]: Start difference. First operand has 371 places, 465 transitions, 6234 flow. Second operand 8 states and 200 transitions. [2024-06-04 16:05:39,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 506 transitions, 7755 flow [2024-06-04 16:05:41,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 506 transitions, 7660 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-04 16:05:41,241 INFO L231 Difference]: Finished difference. Result has 375 places, 473 transitions, 6683 flow [2024-06-04 16:05:41,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6141, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6683, PETRI_PLACES=375, PETRI_TRANSITIONS=473} [2024-06-04 16:05:41,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-04 16:05:41,242 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 473 transitions, 6683 flow [2024-06-04 16:05:41,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:41,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:41,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:41,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-04 16:05:41,242 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:41,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:41,243 INFO L85 PathProgramCache]: Analyzing trace with hash -13046502, now seen corresponding path program 2 times [2024-06-04 16:05:41,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:41,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161404598] [2024-06-04 16:05:41,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:41,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:41,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:41,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:41,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161404598] [2024-06-04 16:05:41,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161404598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:41,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:41,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:41,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987120031] [2024-06-04 16:05:41,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:41,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:41,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:41,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:41,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:41,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:41,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 473 transitions, 6683 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:41,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:41,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:41,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:42,578 INFO L124 PetriNetUnfolderBase]: 3338/5681 cut-off events. [2024-06-04 16:05:42,578 INFO L125 PetriNetUnfolderBase]: For 502479/502482 co-relation queries the response was YES. [2024-06-04 16:05:42,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41732 conditions, 5681 events. 3338/5681 cut-off events. For 502479/502482 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39042 event pairs, 701 based on Foata normal form. 2/5670 useless extension candidates. Maximal degree in co-relation 41572. Up to 4915 conditions per place. [2024-06-04 16:05:42,656 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 131 changer transitions 0/498 dead transitions. [2024-06-04 16:05:42,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 498 transitions, 7727 flow [2024-06-04 16:05:42,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:05:42,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:05:42,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:05:42,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:05:42,657 INFO L175 Difference]: Start difference. First operand has 375 places, 473 transitions, 6683 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:05:42,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 498 transitions, 7727 flow [2024-06-04 16:05:44,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 498 transitions, 7426 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-04 16:05:44,914 INFO L231 Difference]: Finished difference. Result has 378 places, 473 transitions, 6649 flow [2024-06-04 16:05:44,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6382, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6649, PETRI_PLACES=378, PETRI_TRANSITIONS=473} [2024-06-04 16:05:44,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-04 16:05:44,915 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 473 transitions, 6649 flow [2024-06-04 16:05:44,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:44,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:44,915 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] [2024-06-04 16:05:44,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-04 16:05:44,915 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:44,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:44,916 INFO L85 PathProgramCache]: Analyzing trace with hash -8577852, now seen corresponding path program 3 times [2024-06-04 16:05:44,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:44,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958134195] [2024-06-04 16:05:44,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:44,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:45,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:45,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:45,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958134195] [2024-06-04 16:05:45,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958134195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:45,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:45,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:45,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329195247] [2024-06-04 16:05:45,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:45,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:45,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:45,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:45,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:45,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:45,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 473 transitions, 6649 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:45,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:45,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:45,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:46,234 INFO L124 PetriNetUnfolderBase]: 3333/5670 cut-off events. [2024-06-04 16:05:46,234 INFO L125 PetriNetUnfolderBase]: For 503718/503721 co-relation queries the response was YES. [2024-06-04 16:05:46,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41452 conditions, 5670 events. 3333/5670 cut-off events. For 503718/503721 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 38927 event pairs, 673 based on Foata normal form. 4/5665 useless extension candidates. Maximal degree in co-relation 41291. Up to 5064 conditions per place. [2024-06-04 16:05:46,314 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 424 selfloop transitions, 64 changer transitions 0/495 dead transitions. [2024-06-04 16:05:46,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 495 transitions, 7679 flow [2024-06-04 16:05:46,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:05:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:05:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-04 16:05:46,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-04 16:05:46,315 INFO L175 Difference]: Start difference. First operand has 378 places, 473 transitions, 6649 flow. Second operand 8 states and 185 transitions. [2024-06-04 16:05:46,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 495 transitions, 7679 flow [2024-06-04 16:05:48,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 495 transitions, 7380 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 16:05:48,773 INFO L231 Difference]: Finished difference. Result has 380 places, 473 transitions, 6483 flow [2024-06-04 16:05:48,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6350, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6483, PETRI_PLACES=380, PETRI_TRANSITIONS=473} [2024-06-04 16:05:48,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-04 16:05:48,774 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 473 transitions, 6483 flow [2024-06-04 16:05:48,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:48,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:48,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:48,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-04 16:05:48,775 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:48,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:48,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1583878972, now seen corresponding path program 4 times [2024-06-04 16:05:48,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:48,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775569956] [2024-06-04 16:05:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:48,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:49,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:49,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775569956] [2024-06-04 16:05:49,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775569956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:49,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:49,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:05:49,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996422212] [2024-06-04 16:05:49,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:49,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:05:49,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:49,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:05:49,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:05:49,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:49,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 473 transitions, 6483 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:49,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:49,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:49,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:50,085 INFO L124 PetriNetUnfolderBase]: 3341/5678 cut-off events. [2024-06-04 16:05:50,085 INFO L125 PetriNetUnfolderBase]: For 513948/513951 co-relation queries the response was YES. [2024-06-04 16:05:50,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41453 conditions, 5678 events. 3341/5678 cut-off events. For 513948/513951 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 38897 event pairs, 671 based on Foata normal form. 4/5673 useless extension candidates. Maximal degree in co-relation 41291. Up to 5070 conditions per place. [2024-06-04 16:05:50,166 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 70 changer transitions 0/495 dead transitions. [2024-06-04 16:05:50,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 495 transitions, 7576 flow [2024-06-04 16:05:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:05:50,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:05:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-04 16:05:50,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-04 16:05:50,167 INFO L175 Difference]: Start difference. First operand has 380 places, 473 transitions, 6483 flow. Second operand 9 states and 199 transitions. [2024-06-04 16:05:50,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 495 transitions, 7576 flow [2024-06-04 16:05:52,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 495 transitions, 7407 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 16:05:52,744 INFO L231 Difference]: Finished difference. Result has 383 places, 475 transitions, 6532 flow [2024-06-04 16:05:52,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6314, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6532, PETRI_PLACES=383, PETRI_TRANSITIONS=475} [2024-06-04 16:05:52,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-04 16:05:52,745 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 475 transitions, 6532 flow [2024-06-04 16:05:52,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:52,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:52,745 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] [2024-06-04 16:05:52,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-04 16:05:52,745 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:52,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:52,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2072429038, now seen corresponding path program 13 times [2024-06-04 16:05:52,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:52,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233957268] [2024-06-04 16:05:52,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:52,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:52,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:53,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:53,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233957268] [2024-06-04 16:05:53,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233957268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:53,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:53,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:53,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542270018] [2024-06-04 16:05:53,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:53,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:53,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:53,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:53,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:53,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:53,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 475 transitions, 6532 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:53,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:53,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:53,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:54,167 INFO L124 PetriNetUnfolderBase]: 3394/5760 cut-off events. [2024-06-04 16:05:54,167 INFO L125 PetriNetUnfolderBase]: For 546717/546717 co-relation queries the response was YES. [2024-06-04 16:05:54,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42669 conditions, 5760 events. 3394/5760 cut-off events. For 546717/546717 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 39576 event pairs, 671 based on Foata normal form. 1/5755 useless extension candidates. Maximal degree in co-relation 42506. Up to 4709 conditions per place. [2024-06-04 16:05:54,247 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 315 selfloop transitions, 210 changer transitions 0/532 dead transitions. [2024-06-04 16:05:54,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 532 transitions, 8723 flow [2024-06-04 16:05:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:05:54,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:05:54,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 268 transitions. [2024-06-04 16:05:54,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5800865800865801 [2024-06-04 16:05:54,249 INFO L175 Difference]: Start difference. First operand has 383 places, 475 transitions, 6532 flow. Second operand 11 states and 268 transitions. [2024-06-04 16:05:54,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 532 transitions, 8723 flow [2024-06-04 16:05:56,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 532 transitions, 8532 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-04 16:05:56,794 INFO L231 Difference]: Finished difference. Result has 388 places, 492 transitions, 7147 flow [2024-06-04 16:05:56,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6341, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7147, PETRI_PLACES=388, PETRI_TRANSITIONS=492} [2024-06-04 16:05:56,794 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-04 16:05:56,794 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 492 transitions, 7147 flow [2024-06-04 16:05:56,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:56,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:05:56,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:05:56,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-04 16:05:56,795 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:05:56,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:05:56,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1741550016, now seen corresponding path program 14 times [2024-06-04 16:05:56,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:05:56,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218488346] [2024-06-04 16:05:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:05:56,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:05:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:05:57,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:05:57,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:05:57,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218488346] [2024-06-04 16:05:57,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218488346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:05:57,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:05:57,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:05:57,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337388319] [2024-06-04 16:05:57,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:05:57,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:05:57,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:05:57,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:05:57,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:05:57,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:05:57,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 492 transitions, 7147 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:05:57,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:05:57,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:05:57,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:05:58,275 INFO L124 PetriNetUnfolderBase]: 3407/5782 cut-off events. [2024-06-04 16:05:58,275 INFO L125 PetriNetUnfolderBase]: For 563858/563858 co-relation queries the response was YES. [2024-06-04 16:05:58,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43554 conditions, 5782 events. 3407/5782 cut-off events. For 563858/563858 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39791 event pairs, 669 based on Foata normal form. 1/5777 useless extension candidates. Maximal degree in co-relation 43389. Up to 4598 conditions per place. [2024-06-04 16:05:58,363 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 278 selfloop transitions, 258 changer transitions 0/543 dead transitions. [2024-06-04 16:05:58,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 543 transitions, 9221 flow [2024-06-04 16:05:58,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:05:58,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:05:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 307 transitions. [2024-06-04 16:05:58,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5622710622710623 [2024-06-04 16:05:58,365 INFO L175 Difference]: Start difference. First operand has 388 places, 492 transitions, 7147 flow. Second operand 13 states and 307 transitions. [2024-06-04 16:05:58,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 543 transitions, 9221 flow [2024-06-04 16:06:00,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 543 transitions, 8642 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-04 16:06:00,891 INFO L231 Difference]: Finished difference. Result has 394 places, 498 transitions, 7230 flow [2024-06-04 16:06:00,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6612, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7230, PETRI_PLACES=394, PETRI_TRANSITIONS=498} [2024-06-04 16:06:00,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-04 16:06:00,892 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 498 transitions, 7230 flow [2024-06-04 16:06:00,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:00,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:00,893 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, 1] [2024-06-04 16:06:00,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-04 16:06:00,893 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:00,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:00,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1875469550, now seen corresponding path program 15 times [2024-06-04 16:06:00,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:00,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129197776] [2024-06-04 16:06:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:00,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:01,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:01,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:01,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129197776] [2024-06-04 16:06:01,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129197776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:01,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:01,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:01,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207620589] [2024-06-04 16:06:01,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:01,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:01,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:01,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:01,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:01,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:01,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 498 transitions, 7230 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:01,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:01,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:01,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:02,384 INFO L124 PetriNetUnfolderBase]: 3404/5786 cut-off events. [2024-06-04 16:06:02,385 INFO L125 PetriNetUnfolderBase]: For 568271/568271 co-relation queries the response was YES. [2024-06-04 16:06:02,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43462 conditions, 5786 events. 3404/5786 cut-off events. For 568271/568271 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39898 event pairs, 677 based on Foata normal form. 1/5781 useless extension candidates. Maximal degree in co-relation 43296. Up to 4596 conditions per place. [2024-06-04 16:06:02,473 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 277 selfloop transitions, 252 changer transitions 0/536 dead transitions. [2024-06-04 16:06:02,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 536 transitions, 8952 flow [2024-06-04 16:06:02,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:06:02,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:06:02,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-04 16:06:02,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5880952380952381 [2024-06-04 16:06:02,474 INFO L175 Difference]: Start difference. First operand has 394 places, 498 transitions, 7230 flow. Second operand 10 states and 247 transitions. [2024-06-04 16:06:02,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 536 transitions, 8952 flow [2024-06-04 16:06:04,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 536 transitions, 8519 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-04 16:06:04,918 INFO L231 Difference]: Finished difference. Result has 396 places, 498 transitions, 7307 flow [2024-06-04 16:06:04,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6797, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7307, PETRI_PLACES=396, PETRI_TRANSITIONS=498} [2024-06-04 16:06:04,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-04 16:06:04,919 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 498 transitions, 7307 flow [2024-06-04 16:06:04,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:04,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:04,919 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] [2024-06-04 16:06:04,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-04 16:06:04,919 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:04,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:04,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1875589520, now seen corresponding path program 16 times [2024-06-04 16:06:04,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:04,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602580898] [2024-06-04 16:06:04,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:04,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:04,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:05,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:05,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602580898] [2024-06-04 16:06:05,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602580898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:05,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:05,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:05,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377615455] [2024-06-04 16:06:05,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:05,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:05,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:05,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:05,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:05,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:05,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 498 transitions, 7307 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:05,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:05,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:05,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:06,377 INFO L124 PetriNetUnfolderBase]: 3409/5787 cut-off events. [2024-06-04 16:06:06,378 INFO L125 PetriNetUnfolderBase]: For 580574/580574 co-relation queries the response was YES. [2024-06-04 16:06:06,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43676 conditions, 5787 events. 3409/5787 cut-off events. For 580574/580574 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 39809 event pairs, 671 based on Foata normal form. 1/5782 useless extension candidates. Maximal degree in co-relation 43509. Up to 5024 conditions per place. [2024-06-04 16:06:06,460 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 392 selfloop transitions, 134 changer transitions 0/533 dead transitions. [2024-06-04 16:06:06,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 533 transitions, 8496 flow [2024-06-04 16:06:06,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:06:06,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:06:06,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-04 16:06:06,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:06:06,461 INFO L175 Difference]: Start difference. First operand has 396 places, 498 transitions, 7307 flow. Second operand 10 states and 235 transitions. [2024-06-04 16:06:06,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 533 transitions, 8496 flow [2024-06-04 16:06:08,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 533 transitions, 7980 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-04 16:06:08,982 INFO L231 Difference]: Finished difference. Result has 397 places, 501 transitions, 7128 flow [2024-06-04 16:06:08,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6797, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7128, PETRI_PLACES=397, PETRI_TRANSITIONS=501} [2024-06-04 16:06:08,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-04 16:06:08,983 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 501 transitions, 7128 flow [2024-06-04 16:06:08,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:08,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:08,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:08,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-04 16:06:08,983 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:08,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:08,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1884843950, now seen corresponding path program 17 times [2024-06-04 16:06:08,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:08,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712136247] [2024-06-04 16:06:08,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:08,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:09,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:09,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712136247] [2024-06-04 16:06:09,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712136247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:09,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:09,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:09,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585428354] [2024-06-04 16:06:09,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:09,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:09,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:09,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:09,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:09,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:09,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 501 transitions, 7128 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:09,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:09,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:09,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:10,515 INFO L124 PetriNetUnfolderBase]: 3406/5799 cut-off events. [2024-06-04 16:06:10,516 INFO L125 PetriNetUnfolderBase]: For 584277/584277 co-relation queries the response was YES. [2024-06-04 16:06:10,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43304 conditions, 5799 events. 3406/5799 cut-off events. For 584277/584277 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40027 event pairs, 683 based on Foata normal form. 1/5794 useless extension candidates. Maximal degree in co-relation 43136. Up to 5010 conditions per place. [2024-06-04 16:06:10,742 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 144 changer transitions 0/538 dead transitions. [2024-06-04 16:06:10,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 538 transitions, 8474 flow [2024-06-04 16:06:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:06:10,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:06:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 309 transitions. [2024-06-04 16:06:10,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255102040816326 [2024-06-04 16:06:10,744 INFO L175 Difference]: Start difference. First operand has 397 places, 501 transitions, 7128 flow. Second operand 14 states and 309 transitions. [2024-06-04 16:06:10,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 538 transitions, 8474 flow [2024-06-04 16:06:13,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 538 transitions, 8182 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 16:06:13,411 INFO L231 Difference]: Finished difference. Result has 403 places, 501 transitions, 7130 flow [2024-06-04 16:06:13,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6836, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7130, PETRI_PLACES=403, PETRI_TRANSITIONS=501} [2024-06-04 16:06:13,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-04 16:06:13,411 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 501 transitions, 7130 flow [2024-06-04 16:06:13,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:13,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:13,412 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, 1] [2024-06-04 16:06:13,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-04 16:06:13,412 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:13,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:13,412 INFO L85 PathProgramCache]: Analyzing trace with hash 244618612, now seen corresponding path program 18 times [2024-06-04 16:06:13,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:13,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783559664] [2024-06-04 16:06:13,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:13,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:13,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:13,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:13,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783559664] [2024-06-04 16:06:13,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783559664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:13,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:13,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:13,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74980857] [2024-06-04 16:06:13,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:13,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:13,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:13,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:13,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:13,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:13,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 501 transitions, 7130 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:13,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:13,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:13,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:14,889 INFO L124 PetriNetUnfolderBase]: 3403/5795 cut-off events. [2024-06-04 16:06:14,889 INFO L125 PetriNetUnfolderBase]: For 590391/590391 co-relation queries the response was YES. [2024-06-04 16:06:14,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43296 conditions, 5795 events. 3403/5795 cut-off events. For 590391/590391 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40027 event pairs, 683 based on Foata normal form. 1/5790 useless extension candidates. Maximal degree in co-relation 43127. Up to 5007 conditions per place. [2024-06-04 16:06:14,972 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 384 selfloop transitions, 144 changer transitions 0/535 dead transitions. [2024-06-04 16:06:14,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 535 transitions, 8270 flow [2024-06-04 16:06:14,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:06:14,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:06:14,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 272 transitions. [2024-06-04 16:06:14,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396825396825397 [2024-06-04 16:06:14,973 INFO L175 Difference]: Start difference. First operand has 403 places, 501 transitions, 7130 flow. Second operand 12 states and 272 transitions. [2024-06-04 16:06:14,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 535 transitions, 8270 flow [2024-06-04 16:06:18,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 535 transitions, 7876 flow, removed 25 selfloop flow, removed 12 redundant places. [2024-06-04 16:06:18,069 INFO L231 Difference]: Finished difference. Result has 403 places, 501 transitions, 7030 flow [2024-06-04 16:06:18,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6736, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7030, PETRI_PLACES=403, PETRI_TRANSITIONS=501} [2024-06-04 16:06:18,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-04 16:06:18,070 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 501 transitions, 7030 flow [2024-06-04 16:06:18,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:18,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:18,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:18,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-04 16:06:18,070 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:18,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:18,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1451136080, now seen corresponding path program 19 times [2024-06-04 16:06:18,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:18,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014086742] [2024-06-04 16:06:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:18,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:18,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:18,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014086742] [2024-06-04 16:06:18,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014086742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:18,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:18,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:18,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032846750] [2024-06-04 16:06:18,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:18,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:18,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:18,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:18,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:18,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:18,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 501 transitions, 7030 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:18,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:18,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:18,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:19,558 INFO L124 PetriNetUnfolderBase]: 3408/5788 cut-off events. [2024-06-04 16:06:19,559 INFO L125 PetriNetUnfolderBase]: For 601927/601927 co-relation queries the response was YES. [2024-06-04 16:06:19,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43383 conditions, 5788 events. 3408/5788 cut-off events. For 601927/601927 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 39889 event pairs, 669 based on Foata normal form. 1/5783 useless extension candidates. Maximal degree in co-relation 43213. Up to 4600 conditions per place. [2024-06-04 16:06:19,645 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 266 changer transitions 0/545 dead transitions. [2024-06-04 16:06:19,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 545 transitions, 8651 flow [2024-06-04 16:06:19,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:06:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:06:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 266 transitions. [2024-06-04 16:06:19,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5757575757575758 [2024-06-04 16:06:19,646 INFO L175 Difference]: Start difference. First operand has 403 places, 501 transitions, 7030 flow. Second operand 11 states and 266 transitions. [2024-06-04 16:06:19,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 545 transitions, 8651 flow [2024-06-04 16:06:22,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 545 transitions, 8363 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-04 16:06:22,394 INFO L231 Difference]: Finished difference. Result has 403 places, 504 transitions, 7327 flow [2024-06-04 16:06:22,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6742, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7327, PETRI_PLACES=403, PETRI_TRANSITIONS=504} [2024-06-04 16:06:22,395 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-04 16:06:22,395 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 504 transitions, 7327 flow [2024-06-04 16:06:22,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:22,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:22,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:22,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-04 16:06:22,396 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:22,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:22,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1803004690, now seen corresponding path program 20 times [2024-06-04 16:06:22,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:22,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219604161] [2024-06-04 16:06:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:22,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:22,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:22,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:22,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219604161] [2024-06-04 16:06:22,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219604161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:22,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:22,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:22,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69606562] [2024-06-04 16:06:22,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:22,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:22,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:22,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:22,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:22,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:22,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 504 transitions, 7327 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:22,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:22,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:22,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:23,995 INFO L124 PetriNetUnfolderBase]: 3413/5797 cut-off events. [2024-06-04 16:06:23,995 INFO L125 PetriNetUnfolderBase]: For 614781/614781 co-relation queries the response was YES. [2024-06-04 16:06:24,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43976 conditions, 5797 events. 3413/5797 cut-off events. For 614781/614781 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 39979 event pairs, 669 based on Foata normal form. 1/5792 useless extension candidates. Maximal degree in co-relation 43805. Up to 4604 conditions per place. [2024-06-04 16:06:24,074 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 273 selfloop transitions, 270 changer transitions 0/550 dead transitions. [2024-06-04 16:06:24,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 550 transitions, 8972 flow [2024-06-04 16:06:24,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:06:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:06:24,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 302 transitions. [2024-06-04 16:06:24,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5531135531135531 [2024-06-04 16:06:24,076 INFO L175 Difference]: Start difference. First operand has 403 places, 504 transitions, 7327 flow. Second operand 13 states and 302 transitions. [2024-06-04 16:06:24,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 550 transitions, 8972 flow [2024-06-04 16:06:26,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 550 transitions, 8478 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-04 16:06:26,734 INFO L231 Difference]: Finished difference. Result has 408 places, 507 transitions, 7432 flow [2024-06-04 16:06:26,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6842, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7432, PETRI_PLACES=408, PETRI_TRANSITIONS=507} [2024-06-04 16:06:26,735 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-04 16:06:26,735 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 507 transitions, 7432 flow [2024-06-04 16:06:26,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:26,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:26,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:26,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-04 16:06:26,735 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:26,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:26,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1513434326, now seen corresponding path program 21 times [2024-06-04 16:06:26,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:26,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353398778] [2024-06-04 16:06:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:26,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:26,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:26,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:26,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353398778] [2024-06-04 16:06:26,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353398778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:26,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:26,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:26,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655644099] [2024-06-04 16:06:26,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:26,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:26,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:26,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:26,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:27,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:27,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 507 transitions, 7432 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:27,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:27,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:27,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:28,212 INFO L124 PetriNetUnfolderBase]: 3439/5853 cut-off events. [2024-06-04 16:06:28,212 INFO L125 PetriNetUnfolderBase]: For 641056/641056 co-relation queries the response was YES. [2024-06-04 16:06:28,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44598 conditions, 5853 events. 3439/5853 cut-off events. For 641056/641056 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 40509 event pairs, 680 based on Foata normal form. 2/5849 useless extension candidates. Maximal degree in co-relation 44426. Up to 4632 conditions per place. [2024-06-04 16:06:28,307 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 274 changer transitions 0/553 dead transitions. [2024-06-04 16:06:28,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 553 transitions, 9158 flow [2024-06-04 16:06:28,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:06:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:06:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 279 transitions. [2024-06-04 16:06:28,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 16:06:28,308 INFO L175 Difference]: Start difference. First operand has 408 places, 507 transitions, 7432 flow. Second operand 12 states and 279 transitions. [2024-06-04 16:06:28,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 553 transitions, 9158 flow [2024-06-04 16:06:31,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 553 transitions, 8572 flow, removed 13 selfloop flow, removed 11 redundant places. [2024-06-04 16:06:31,192 INFO L231 Difference]: Finished difference. Result has 409 places, 517 transitions, 7545 flow [2024-06-04 16:06:31,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6866, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7545, PETRI_PLACES=409, PETRI_TRANSITIONS=517} [2024-06-04 16:06:31,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-04 16:06:31,193 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 517 transitions, 7545 flow [2024-06-04 16:06:31,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:31,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:31,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:31,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-04 16:06:31,194 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:31,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:31,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1650697134, now seen corresponding path program 22 times [2024-06-04 16:06:31,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:31,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106759693] [2024-06-04 16:06:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:31,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:31,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:31,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:31,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106759693] [2024-06-04 16:06:31,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106759693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:31,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:31,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:31,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274718040] [2024-06-04 16:06:31,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:31,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:31,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:31,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:31,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:31,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:31,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 517 transitions, 7545 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:31,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:31,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:31,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:32,793 INFO L124 PetriNetUnfolderBase]: 3497/5933 cut-off events. [2024-06-04 16:06:32,793 INFO L125 PetriNetUnfolderBase]: For 686106/686106 co-relation queries the response was YES. [2024-06-04 16:06:32,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45851 conditions, 5933 events. 3497/5933 cut-off events. For 686106/686106 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41041 event pairs, 669 based on Foata normal form. 2/5929 useless extension candidates. Maximal degree in co-relation 45678. Up to 5027 conditions per place. [2024-06-04 16:06:32,886 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 385 selfloop transitions, 176 changer transitions 0/568 dead transitions. [2024-06-04 16:06:32,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 568 transitions, 9635 flow [2024-06-04 16:06:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:06:32,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:06:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 313 transitions. [2024-06-04 16:06:32,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532312925170068 [2024-06-04 16:06:32,887 INFO L175 Difference]: Start difference. First operand has 409 places, 517 transitions, 7545 flow. Second operand 14 states and 313 transitions. [2024-06-04 16:06:32,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 568 transitions, 9635 flow [2024-06-04 16:06:36,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 568 transitions, 9188 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-04 16:06:36,470 INFO L231 Difference]: Finished difference. Result has 418 places, 535 transitions, 7839 flow [2024-06-04 16:06:36,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7113, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7839, PETRI_PLACES=418, PETRI_TRANSITIONS=535} [2024-06-04 16:06:36,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-04 16:06:36,471 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 535 transitions, 7839 flow [2024-06-04 16:06:36,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:36,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:36,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:36,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-04 16:06:36,471 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:36,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:36,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1650489744, now seen corresponding path program 23 times [2024-06-04 16:06:36,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:36,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043412680] [2024-06-04 16:06:36,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:36,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:36,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:36,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043412680] [2024-06-04 16:06:36,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043412680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:36,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:36,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:36,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423781802] [2024-06-04 16:06:36,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:36,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:36,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:36,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:36,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:36,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:36,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 535 transitions, 7839 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:36,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:36,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:36,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:38,034 INFO L124 PetriNetUnfolderBase]: 3491/5929 cut-off events. [2024-06-04 16:06:38,034 INFO L125 PetriNetUnfolderBase]: For 687967/687967 co-relation queries the response was YES. [2024-06-04 16:06:38,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45642 conditions, 5929 events. 3491/5929 cut-off events. For 687967/687967 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 40965 event pairs, 671 based on Foata normal form. 2/5925 useless extension candidates. Maximal degree in co-relation 45465. Up to 5022 conditions per place. [2024-06-04 16:06:38,118 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 383 selfloop transitions, 177 changer transitions 0/567 dead transitions. [2024-06-04 16:06:38,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 567 transitions, 9447 flow [2024-06-04 16:06:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:06:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:06:38,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 310 transitions. [2024-06-04 16:06:38,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-04 16:06:38,120 INFO L175 Difference]: Start difference. First operand has 418 places, 535 transitions, 7839 flow. Second operand 14 states and 310 transitions. [2024-06-04 16:06:38,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 567 transitions, 9447 flow [2024-06-04 16:06:41,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 567 transitions, 9059 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-04 16:06:41,107 INFO L231 Difference]: Finished difference. Result has 422 places, 535 transitions, 7812 flow [2024-06-04 16:06:41,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7451, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7812, PETRI_PLACES=422, PETRI_TRANSITIONS=535} [2024-06-04 16:06:41,107 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-04 16:06:41,107 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 535 transitions, 7812 flow [2024-06-04 16:06:41,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:41,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:41,108 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] [2024-06-04 16:06:41,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-04 16:06:41,108 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:41,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:41,108 INFO L85 PathProgramCache]: Analyzing trace with hash -354243312, now seen corresponding path program 24 times [2024-06-04 16:06:41,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:41,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052113173] [2024-06-04 16:06:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:41,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:41,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:41,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052113173] [2024-06-04 16:06:41,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052113173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:41,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:41,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:41,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693120413] [2024-06-04 16:06:41,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:41,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:41,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:41,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:41,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:41,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:41,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 535 transitions, 7812 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:41,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:41,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:41,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:42,680 INFO L124 PetriNetUnfolderBase]: 3485/5925 cut-off events. [2024-06-04 16:06:42,681 INFO L125 PetriNetUnfolderBase]: For 688765/688765 co-relation queries the response was YES. [2024-06-04 16:06:42,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45442 conditions, 5925 events. 3485/5925 cut-off events. For 688765/688765 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41064 event pairs, 673 based on Foata normal form. 2/5921 useless extension candidates. Maximal degree in co-relation 45264. Up to 5017 conditions per place. [2024-06-04 16:06:42,774 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 387 selfloop transitions, 169 changer transitions 0/563 dead transitions. [2024-06-04 16:06:42,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 563 transitions, 9200 flow [2024-06-04 16:06:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:06:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:06:42,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-04 16:06:42,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-04 16:06:42,775 INFO L175 Difference]: Start difference. First operand has 422 places, 535 transitions, 7812 flow. Second operand 11 states and 252 transitions. [2024-06-04 16:06:42,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 563 transitions, 9200 flow [2024-06-04 16:06:46,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 563 transitions, 8825 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-04 16:06:46,057 INFO L231 Difference]: Finished difference. Result has 421 places, 535 transitions, 7782 flow [2024-06-04 16:06:46,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7437, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7782, PETRI_PLACES=421, PETRI_TRANSITIONS=535} [2024-06-04 16:06:46,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-04 16:06:46,057 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 535 transitions, 7782 flow [2024-06-04 16:06:46,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:46,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:46,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:46,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-04 16:06:46,058 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:46,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:46,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1498567846, now seen corresponding path program 25 times [2024-06-04 16:06:46,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:46,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642476254] [2024-06-04 16:06:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:46,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:46,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:46,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:46,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642476254] [2024-06-04 16:06:46,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642476254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:46,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:46,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:46,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921120706] [2024-06-04 16:06:46,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:46,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:46,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:46,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:46,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:46,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:46,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 535 transitions, 7782 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:46,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:46,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:46,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:47,685 INFO L124 PetriNetUnfolderBase]: 3479/5920 cut-off events. [2024-06-04 16:06:47,685 INFO L125 PetriNetUnfolderBase]: For 689939/689942 co-relation queries the response was YES. [2024-06-04 16:06:47,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45253 conditions, 5920 events. 3479/5920 cut-off events. For 689939/689942 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41046 event pairs, 675 based on Foata normal form. 4/5917 useless extension candidates. Maximal degree in co-relation 45074. Up to 4764 conditions per place. [2024-06-04 16:06:47,781 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 289 selfloop transitions, 297 changer transitions 0/593 dead transitions. [2024-06-04 16:06:47,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 593 transitions, 9938 flow [2024-06-04 16:06:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:06:47,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:06:47,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 346 transitions. [2024-06-04 16:06:47,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 16:06:47,783 INFO L175 Difference]: Start difference. First operand has 421 places, 535 transitions, 7782 flow. Second operand 14 states and 346 transitions. [2024-06-04 16:06:47,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 593 transitions, 9938 flow [2024-06-04 16:06:51,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 593 transitions, 9561 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-04 16:06:51,175 INFO L231 Difference]: Finished difference. Result has 424 places, 535 transitions, 8022 flow [2024-06-04 16:06:51,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7405, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8022, PETRI_PLACES=424, PETRI_TRANSITIONS=535} [2024-06-04 16:06:51,175 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-04 16:06:51,176 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 535 transitions, 8022 flow [2024-06-04 16:06:51,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:51,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:51,176 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] [2024-06-04 16:06:51,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-04 16:06:51,176 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:51,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:51,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1740402060, now seen corresponding path program 26 times [2024-06-04 16:06:51,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:51,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014290705] [2024-06-04 16:06:51,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:51,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:51,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:51,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014290705] [2024-06-04 16:06:51,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014290705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:51,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:51,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:51,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762134042] [2024-06-04 16:06:51,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:51,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:51,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:51,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:51,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:51,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:51,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 535 transitions, 8022 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:51,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:51,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:51,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:52,796 INFO L124 PetriNetUnfolderBase]: 3473/5905 cut-off events. [2024-06-04 16:06:52,796 INFO L125 PetriNetUnfolderBase]: For 692004/692004 co-relation queries the response was YES. [2024-06-04 16:06:52,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45479 conditions, 5905 events. 3473/5905 cut-off events. For 692004/692004 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 40927 event pairs, 671 based on Foata normal form. 2/5901 useless extension candidates. Maximal degree in co-relation 45299. Up to 4759 conditions per place. [2024-06-04 16:06:52,887 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 268 changer transitions 0/584 dead transitions. [2024-06-04 16:06:52,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 584 transitions, 9934 flow [2024-06-04 16:06:52,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:06:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:06:52,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 298 transitions. [2024-06-04 16:06:52,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-04 16:06:52,889 INFO L175 Difference]: Start difference. First operand has 424 places, 535 transitions, 8022 flow. Second operand 12 states and 298 transitions. [2024-06-04 16:06:52,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 584 transitions, 9934 flow [2024-06-04 16:06:56,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 584 transitions, 9452 flow, removed 32 selfloop flow, removed 13 redundant places. [2024-06-04 16:06:56,351 INFO L231 Difference]: Finished difference. Result has 423 places, 535 transitions, 8120 flow [2024-06-04 16:06:56,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7564, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=268, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8120, PETRI_PLACES=423, PETRI_TRANSITIONS=535} [2024-06-04 16:06:56,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-04 16:06:56,352 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 535 transitions, 8120 flow [2024-06-04 16:06:56,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:56,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:06:56,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:06:56,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-04 16:06:56,353 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:06:56,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:06:56,353 INFO L85 PathProgramCache]: Analyzing trace with hash 423810898, now seen corresponding path program 27 times [2024-06-04 16:06:56,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:06:56,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580411362] [2024-06-04 16:06:56,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:06:56,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:06:56,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:06:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:06:56,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:06:56,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580411362] [2024-06-04 16:06:56,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580411362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:06:56,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:06:56,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:06:56,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315909640] [2024-06-04 16:06:56,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:06:56,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:06:56,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:06:56,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:06:56,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:06:56,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:06:56,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 535 transitions, 8120 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:06:56,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:06:56,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:06:56,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:06:57,973 INFO L124 PetriNetUnfolderBase]: 3467/5909 cut-off events. [2024-06-04 16:06:57,973 INFO L125 PetriNetUnfolderBase]: For 646580/646580 co-relation queries the response was YES. [2024-06-04 16:06:58,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44978 conditions, 5909 events. 3467/5909 cut-off events. For 646580/646580 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41051 event pairs, 681 based on Foata normal form. 2/5905 useless extension candidates. Maximal degree in co-relation 44800. Up to 4754 conditions per place. [2024-06-04 16:06:58,063 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 244 changer transitions 0/570 dead transitions. [2024-06-04 16:06:58,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 570 transitions, 9540 flow [2024-06-04 16:06:58,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:06:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:06:58,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-04 16:06:58,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:06:58,064 INFO L175 Difference]: Start difference. First operand has 423 places, 535 transitions, 8120 flow. Second operand 9 states and 225 transitions. [2024-06-04 16:06:58,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 570 transitions, 9540 flow [2024-06-04 16:07:01,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 570 transitions, 8854 flow, removed 22 selfloop flow, removed 15 redundant places. [2024-06-04 16:07:01,303 INFO L231 Difference]: Finished difference. Result has 417 places, 535 transitions, 7944 flow [2024-06-04 16:07:01,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7440, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7944, PETRI_PLACES=417, PETRI_TRANSITIONS=535} [2024-06-04 16:07:01,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-04 16:07:01,303 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 535 transitions, 7944 flow [2024-06-04 16:07:01,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:01,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:01,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:01,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-04 16:07:01,304 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:01,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:01,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1754427988, now seen corresponding path program 28 times [2024-06-04 16:07:01,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:01,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70692896] [2024-06-04 16:07:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:01,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:01,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:01,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70692896] [2024-06-04 16:07:01,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70692896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:01,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:01,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:01,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029937025] [2024-06-04 16:07:01,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:01,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:01,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:01,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:01,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:01,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:01,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 535 transitions, 7944 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:01,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:01,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:01,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:02,939 INFO L124 PetriNetUnfolderBase]: 3461/5892 cut-off events. [2024-06-04 16:07:02,940 INFO L125 PetriNetUnfolderBase]: For 613411/613414 co-relation queries the response was YES. [2024-06-04 16:07:03,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44331 conditions, 5892 events. 3461/5892 cut-off events. For 613411/613414 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 40813 event pairs, 673 based on Foata normal form. 4/5889 useless extension candidates. Maximal degree in co-relation 44155. Up to 4749 conditions per place. [2024-06-04 16:07:03,042 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 280 selfloop transitions, 297 changer transitions 0/584 dead transitions. [2024-06-04 16:07:03,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 584 transitions, 9826 flow [2024-06-04 16:07:03,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:07:03,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:07:03,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 299 transitions. [2024-06-04 16:07:03,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5932539682539683 [2024-06-04 16:07:03,043 INFO L175 Difference]: Start difference. First operand has 417 places, 535 transitions, 7944 flow. Second operand 12 states and 299 transitions. [2024-06-04 16:07:03,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 584 transitions, 9826 flow [2024-06-04 16:07:06,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 584 transitions, 9257 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-04 16:07:06,099 INFO L231 Difference]: Finished difference. Result has 418 places, 535 transitions, 8000 flow [2024-06-04 16:07:06,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7387, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8000, PETRI_PLACES=418, PETRI_TRANSITIONS=535} [2024-06-04 16:07:06,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-04 16:07:06,100 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 535 transitions, 8000 flow [2024-06-04 16:07:06,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:06,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:06,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:06,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-04 16:07:06,100 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:06,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:06,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1350958246, now seen corresponding path program 29 times [2024-06-04 16:07:06,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:06,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971241142] [2024-06-04 16:07:06,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:06,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:06,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:06,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971241142] [2024-06-04 16:07:06,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971241142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:06,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:06,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:06,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130020878] [2024-06-04 16:07:06,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:06,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:06,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:06,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:06,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:06,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:06,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 535 transitions, 8000 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:06,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:06,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:06,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:08,008 INFO L124 PetriNetUnfolderBase]: 3455/5884 cut-off events. [2024-06-04 16:07:08,009 INFO L125 PetriNetUnfolderBase]: For 591425/591425 co-relation queries the response was YES. [2024-06-04 16:07:08,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44018 conditions, 5884 events. 3455/5884 cut-off events. For 591425/591425 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 40784 event pairs, 662 based on Foata normal form. 2/5881 useless extension candidates. Maximal degree in co-relation 43843. Up to 5219 conditions per place. [2024-06-04 16:07:08,105 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 475 selfloop transitions, 75 changer transitions 0/557 dead transitions. [2024-06-04 16:07:08,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 557 transitions, 9156 flow [2024-06-04 16:07:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:07:08,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:07:08,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-04 16:07:08,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:07:08,107 INFO L175 Difference]: Start difference. First operand has 418 places, 535 transitions, 8000 flow. Second operand 6 states and 156 transitions. [2024-06-04 16:07:08,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 557 transitions, 9156 flow [2024-06-04 16:07:10,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 557 transitions, 8532 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-04 16:07:10,772 INFO L231 Difference]: Finished difference. Result has 412 places, 535 transitions, 7558 flow [2024-06-04 16:07:10,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7376, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7558, PETRI_PLACES=412, PETRI_TRANSITIONS=535} [2024-06-04 16:07:10,773 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-04 16:07:10,773 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 535 transitions, 7558 flow [2024-06-04 16:07:10,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:10,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:10,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:10,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-04 16:07:10,773 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:10,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:10,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1744180156, now seen corresponding path program 30 times [2024-06-04 16:07:10,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:10,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013251607] [2024-06-04 16:07:10,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:10,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:11,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:11,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013251607] [2024-06-04 16:07:11,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013251607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:11,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:11,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:07:11,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806212803] [2024-06-04 16:07:11,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:11,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:07:11,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:11,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:07:11,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:07:11,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:11,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 535 transitions, 7558 flow. Second operand has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:11,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:11,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:11,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:12,367 INFO L124 PetriNetUnfolderBase]: 3449/5873 cut-off events. [2024-06-04 16:07:12,368 INFO L125 PetriNetUnfolderBase]: For 558117/558117 co-relation queries the response was YES. [2024-06-04 16:07:12,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42957 conditions, 5873 events. 3449/5873 cut-off events. For 558117/558117 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 40707 event pairs, 671 based on Foata normal form. 2/5869 useless extension candidates. Maximal degree in co-relation 42782. Up to 4739 conditions per place. [2024-06-04 16:07:12,462 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 304 selfloop transitions, 271 changer transitions 0/582 dead transitions. [2024-06-04 16:07:12,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 582 transitions, 9022 flow [2024-06-04 16:07:12,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:07:12,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:07:12,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 294 transitions. [2024-06-04 16:07:12,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:07:12,463 INFO L175 Difference]: Start difference. First operand has 412 places, 535 transitions, 7558 flow. Second operand 12 states and 294 transitions. [2024-06-04 16:07:12,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 582 transitions, 9022 flow [2024-06-04 16:07:15,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 582 transitions, 8768 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-04 16:07:15,140 INFO L231 Difference]: Finished difference. Result has 417 places, 535 transitions, 7874 flow [2024-06-04 16:07:15,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7308, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7874, PETRI_PLACES=417, PETRI_TRANSITIONS=535} [2024-06-04 16:07:15,153 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-04 16:07:15,154 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 535 transitions, 7874 flow [2024-06-04 16:07:15,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.88888888888889) internal successors, (143), 9 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:15,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:15,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:15,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-04 16:07:15,154 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:15,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:15,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2058494034, now seen corresponding path program 5 times [2024-06-04 16:07:15,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:15,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215919464] [2024-06-04 16:07:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:15,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:15,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:15,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215919464] [2024-06-04 16:07:15,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215919464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:15,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:15,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:15,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795175314] [2024-06-04 16:07:15,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:15,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:15,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:15,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:15,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:15,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:15,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 535 transitions, 7874 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:15,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:15,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:15,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:16,828 INFO L124 PetriNetUnfolderBase]: 3634/6179 cut-off events. [2024-06-04 16:07:16,829 INFO L125 PetriNetUnfolderBase]: For 699733/699733 co-relation queries the response was YES. [2024-06-04 16:07:16,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48989 conditions, 6179 events. 3634/6179 cut-off events. For 699733/699733 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 43104 event pairs, 729 based on Foata normal form. 2/6175 useless extension candidates. Maximal degree in co-relation 48814. Up to 5152 conditions per place. [2024-06-04 16:07:16,922 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 440 selfloop transitions, 126 changer transitions 0/573 dead transitions. [2024-06-04 16:07:16,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 573 transitions, 9551 flow [2024-06-04 16:07:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:16,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:07:16,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-04 16:07:16,923 INFO L175 Difference]: Start difference. First operand has 417 places, 535 transitions, 7874 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:07:16,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 573 transitions, 9551 flow [2024-06-04 16:07:20,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 573 transitions, 8970 flow, removed 11 selfloop flow, removed 15 redundant places. [2024-06-04 16:07:20,280 INFO L231 Difference]: Finished difference. Result has 411 places, 543 transitions, 7837 flow [2024-06-04 16:07:20,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7301, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7837, PETRI_PLACES=411, PETRI_TRANSITIONS=543} [2024-06-04 16:07:20,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-04 16:07:20,281 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 543 transitions, 7837 flow [2024-06-04 16:07:20,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:20,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:20,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:20,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-04 16:07:20,281 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:20,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:20,282 INFO L85 PathProgramCache]: Analyzing trace with hash 126478418, now seen corresponding path program 6 times [2024-06-04 16:07:20,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:20,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555897582] [2024-06-04 16:07:20,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:20,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:20,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:20,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:20,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555897582] [2024-06-04 16:07:20,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555897582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:20,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:20,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:20,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430123553] [2024-06-04 16:07:20,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:20,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:20,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:20,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:20,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:20,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 543 transitions, 7837 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:20,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:20,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:20,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:21,995 INFO L124 PetriNetUnfolderBase]: 3773/6411 cut-off events. [2024-06-04 16:07:21,996 INFO L125 PetriNetUnfolderBase]: For 767576/767576 co-relation queries the response was YES. [2024-06-04 16:07:22,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52823 conditions, 6411 events. 3773/6411 cut-off events. For 767576/767576 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 44940 event pairs, 773 based on Foata normal form. 2/6406 useless extension candidates. Maximal degree in co-relation 52650. Up to 5411 conditions per place. [2024-06-04 16:07:22,103 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 445 selfloop transitions, 129 changer transitions 0/581 dead transitions. [2024-06-04 16:07:22,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 581 transitions, 9540 flow [2024-06-04 16:07:22,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:22,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:07:22,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:07:22,104 INFO L175 Difference]: Start difference. First operand has 411 places, 543 transitions, 7837 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:07:22,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 581 transitions, 9540 flow [2024-06-04 16:07:25,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 581 transitions, 9249 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:25,730 INFO L231 Difference]: Finished difference. Result has 415 places, 551 transitions, 8103 flow [2024-06-04 16:07:25,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7546, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8103, PETRI_PLACES=415, PETRI_TRANSITIONS=551} [2024-06-04 16:07:25,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-04 16:07:25,731 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 551 transitions, 8103 flow [2024-06-04 16:07:25,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:25,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:25,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:25,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-04 16:07:25,731 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:07:25,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:25,732 INFO L85 PathProgramCache]: Analyzing trace with hash -280493394, now seen corresponding path program 7 times [2024-06-04 16:07:25,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:25,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856982488] [2024-06-04 16:07:25,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:25,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:25,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:25,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:25,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856982488] [2024-06-04 16:07:25,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856982488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:25,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:25,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:25,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792064301] [2024-06-04 16:07:25,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:25,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:25,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:25,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:26,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:26,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 551 transitions, 8103 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:26,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:26,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:26,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:27,394 INFO L124 PetriNetUnfolderBase]: 3781/6429 cut-off events. [2024-06-04 16:07:27,395 INFO L125 PetriNetUnfolderBase]: For 782841/782841 co-relation queries the response was YES. [2024-06-04 16:07:27,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53153 conditions, 6429 events. 3781/6429 cut-off events. For 782841/782841 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 45072 event pairs, 781 based on Foata normal form. 2/6425 useless extension candidates. Maximal degree in co-relation 52978. Up to 5572 conditions per place. [2024-06-04 16:07:27,495 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 449 selfloop transitions, 119 changer transitions 0/575 dead transitions. [2024-06-04 16:07:27,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 575 transitions, 9348 flow [2024-06-04 16:07:27,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:27,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:07:27,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-04 16:07:27,496 INFO L175 Difference]: Start difference. First operand has 415 places, 551 transitions, 8103 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:07:27,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 575 transitions, 9348 flow [2024-06-04 16:07:31,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 575 transitions, 9034 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-04 16:07:31,145 INFO L231 Difference]: Finished difference. Result has 418 places, 553 transitions, 8091 flow [2024-06-04 16:07:31,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8091, PETRI_PLACES=418, PETRI_TRANSITIONS=553} [2024-06-04 16:07:31,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-04 16:07:31,145 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 553 transitions, 8091 flow [2024-06-04 16:07:31,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:31,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:31,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:31,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-04 16:07:31,146 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)] === [2024-06-04 16:07:31,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:31,146 INFO L85 PathProgramCache]: Analyzing trace with hash 2085254796, now seen corresponding path program 8 times [2024-06-04 16:07:31,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:31,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005202574] [2024-06-04 16:07:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:31,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:31,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:31,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005202574] [2024-06-04 16:07:31,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005202574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:31,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:31,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:31,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189812236] [2024-06-04 16:07:31,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:31,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:31,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:31,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:31,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:31,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:31,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 553 transitions, 8091 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:31,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:31,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:31,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:32,768 INFO L124 PetriNetUnfolderBase]: 3776/6422 cut-off events. [2024-06-04 16:07:32,768 INFO L125 PetriNetUnfolderBase]: For 785298/785298 co-relation queries the response was YES. [2024-06-04 16:07:32,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52756 conditions, 6422 events. 3776/6422 cut-off events. For 785298/785298 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 45103 event pairs, 780 based on Foata normal form. 2/6418 useless extension candidates. Maximal degree in co-relation 52580. Up to 5565 conditions per place. [2024-06-04 16:07:32,873 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 446 selfloop transitions, 122 changer transitions 0/575 dead transitions. [2024-06-04 16:07:32,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 575 transitions, 9281 flow [2024-06-04 16:07:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:32,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:32,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:07:32,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:07:32,874 INFO L175 Difference]: Start difference. First operand has 418 places, 553 transitions, 8091 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:07:32,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 575 transitions, 9281 flow [2024-06-04 16:07:36,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 575 transitions, 9006 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:36,648 INFO L231 Difference]: Finished difference. Result has 420 places, 553 transitions, 8065 flow [2024-06-04 16:07:36,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7816, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8065, PETRI_PLACES=420, PETRI_TRANSITIONS=553} [2024-06-04 16:07:36,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-04 16:07:36,649 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 553 transitions, 8065 flow [2024-06-04 16:07:36,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:36,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:36,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:36,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-04 16:07:36,649 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)] === [2024-06-04 16:07:36,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:36,650 INFO L85 PathProgramCache]: Analyzing trace with hash -2094421330, now seen corresponding path program 9 times [2024-06-04 16:07:36,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:36,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145436961] [2024-06-04 16:07:36,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:36,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:36,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:36,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:36,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145436961] [2024-06-04 16:07:36,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145436961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:36,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:36,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:36,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938668184] [2024-06-04 16:07:36,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:36,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:36,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:36,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:36,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:36,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:36,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 553 transitions, 8065 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:36,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:36,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:36,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:38,361 INFO L124 PetriNetUnfolderBase]: 3784/6434 cut-off events. [2024-06-04 16:07:38,361 INFO L125 PetriNetUnfolderBase]: For 800530/800530 co-relation queries the response was YES. [2024-06-04 16:07:38,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52988 conditions, 6434 events. 3784/6434 cut-off events. For 800530/800530 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 45189 event pairs, 780 based on Foata normal form. 2/6430 useless extension candidates. Maximal degree in co-relation 52811. Up to 5733 conditions per place. [2024-06-04 16:07:38,472 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 508 selfloop transitions, 59 changer transitions 0/574 dead transitions. [2024-06-04 16:07:38,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 574 transitions, 9311 flow [2024-06-04 16:07:38,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-04 16:07:38,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5386904761904762 [2024-06-04 16:07:38,473 INFO L175 Difference]: Start difference. First operand has 420 places, 553 transitions, 8065 flow. Second operand 8 states and 181 transitions. [2024-06-04 16:07:38,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 574 transitions, 9311 flow [2024-06-04 16:07:42,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 574 transitions, 9030 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:42,760 INFO L231 Difference]: Finished difference. Result has 422 places, 555 transitions, 7977 flow [2024-06-04 16:07:42,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7784, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7977, PETRI_PLACES=422, PETRI_TRANSITIONS=555} [2024-06-04 16:07:42,760 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-04 16:07:42,760 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 555 transitions, 7977 flow [2024-06-04 16:07:42,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:42,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:42,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:42,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-04 16:07:42,762 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)] === [2024-06-04 16:07:42,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:42,762 INFO L85 PathProgramCache]: Analyzing trace with hash 33145386, now seen corresponding path program 10 times [2024-06-04 16:07:42,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:42,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054319145] [2024-06-04 16:07:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:42,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:42,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:42,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054319145] [2024-06-04 16:07:42,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054319145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:42,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:42,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:42,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228063781] [2024-06-04 16:07:42,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:42,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:42,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:42,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:42,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:43,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:43,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 555 transitions, 7977 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:43,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:43,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:43,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:44,525 INFO L124 PetriNetUnfolderBase]: 3792/6460 cut-off events. [2024-06-04 16:07:44,525 INFO L125 PetriNetUnfolderBase]: For 816546/816546 co-relation queries the response was YES. [2024-06-04 16:07:44,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53075 conditions, 6460 events. 3792/6460 cut-off events. For 816546/816546 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 45269 event pairs, 610 based on Foata normal form. 2/6456 useless extension candidates. Maximal degree in co-relation 52897. Up to 4005 conditions per place. [2024-06-04 16:07:44,617 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 157 changer transitions 0/592 dead transitions. [2024-06-04 16:07:44,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 592 transitions, 9744 flow [2024-06-04 16:07:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:44,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-04 16:07:44,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-04 16:07:44,619 INFO L175 Difference]: Start difference. First operand has 422 places, 555 transitions, 7977 flow. Second operand 8 states and 199 transitions. [2024-06-04 16:07:44,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 592 transitions, 9744 flow [2024-06-04 16:07:48,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 592 transitions, 9585 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-04 16:07:48,319 INFO L231 Difference]: Finished difference. Result has 424 places, 557 transitions, 8196 flow [2024-06-04 16:07:48,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7818, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8196, PETRI_PLACES=424, PETRI_TRANSITIONS=557} [2024-06-04 16:07:48,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-04 16:07:48,320 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 557 transitions, 8196 flow [2024-06-04 16:07:48,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:48,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:48,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:48,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-04 16:07:48,321 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)] === [2024-06-04 16:07:48,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:48,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1910393872, now seen corresponding path program 11 times [2024-06-04 16:07:48,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:48,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326582929] [2024-06-04 16:07:48,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:48,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:48,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:48,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:48,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326582929] [2024-06-04 16:07:48,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326582929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:48,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:48,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:48,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362953344] [2024-06-04 16:07:48,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:48,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:48,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:48,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:48,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:48,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 557 transitions, 8196 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:48,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:48,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:48,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:49,930 INFO L124 PetriNetUnfolderBase]: 3767/6408 cut-off events. [2024-06-04 16:07:49,930 INFO L125 PetriNetUnfolderBase]: For 827397/827397 co-relation queries the response was YES. [2024-06-04 16:07:50,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52959 conditions, 6408 events. 3767/6408 cut-off events. For 827397/827397 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44816 event pairs, 673 based on Foata normal form. 8/6410 useless extension candidates. Maximal degree in co-relation 52780. Up to 3991 conditions per place. [2024-06-04 16:07:50,031 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 144 changer transitions 0/589 dead transitions. [2024-06-04 16:07:50,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 589 transitions, 9692 flow [2024-06-04 16:07:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:50,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:07:50,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:07:50,033 INFO L175 Difference]: Start difference. First operand has 424 places, 557 transitions, 8196 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:07:50,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 589 transitions, 9692 flow [2024-06-04 16:07:54,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 589 transitions, 9239 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-04 16:07:54,329 INFO L231 Difference]: Finished difference. Result has 424 places, 557 transitions, 8037 flow [2024-06-04 16:07:54,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8037, PETRI_PLACES=424, PETRI_TRANSITIONS=557} [2024-06-04 16:07:54,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 381 predicate places. [2024-06-04 16:07:54,330 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 557 transitions, 8037 flow [2024-06-04 16:07:54,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:54,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:07:54,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:07:54,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-04 16:07:54,331 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)] === [2024-06-04 16:07:54,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:07:54,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1503903190, now seen corresponding path program 12 times [2024-06-04 16:07:54,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:07:54,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965044880] [2024-06-04 16:07:54,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:07:54,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:07:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:07:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:07:54,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:07:54,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965044880] [2024-06-04 16:07:54,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965044880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:07:54,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:07:54,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:07:54,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334007516] [2024-06-04 16:07:54,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:07:54,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:07:54,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:07:54,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:07:54,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:07:54,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:07:54,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 557 transitions, 8037 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:07:54,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:07:54,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:07:54,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:07:55,935 INFO L124 PetriNetUnfolderBase]: 3744/6374 cut-off events. [2024-06-04 16:07:55,936 INFO L125 PetriNetUnfolderBase]: For 795244/795244 co-relation queries the response was YES. [2024-06-04 16:07:56,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51016 conditions, 6374 events. 3744/6374 cut-off events. For 795244/795244 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44731 event pairs, 744 based on Foata normal form. 10/6378 useless extension candidates. Maximal degree in co-relation 50839. Up to 5239 conditions per place. [2024-06-04 16:07:56,037 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 460 selfloop transitions, 117 changer transitions 0/584 dead transitions. [2024-06-04 16:07:56,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 584 transitions, 9517 flow [2024-06-04 16:07:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:07:56,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:07:56,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:07:56,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:07:56,038 INFO L175 Difference]: Start difference. First operand has 424 places, 557 transitions, 8037 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:07:56,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 584 transitions, 9517 flow [2024-06-04 16:08:00,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 584 transitions, 9204 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:08:00,266 INFO L231 Difference]: Finished difference. Result has 425 places, 557 transitions, 7965 flow [2024-06-04 16:08:00,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7724, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7965, PETRI_PLACES=425, PETRI_TRANSITIONS=557} [2024-06-04 16:08:00,266 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-04 16:08:00,266 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 557 transitions, 7965 flow [2024-06-04 16:08:00,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:00,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:00,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:00,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-04 16:08:00,267 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)] === [2024-06-04 16:08:00,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:00,267 INFO L85 PathProgramCache]: Analyzing trace with hash 366705650, now seen corresponding path program 13 times [2024-06-04 16:08:00,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:00,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387839666] [2024-06-04 16:08:00,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:00,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:00,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:00,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:00,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387839666] [2024-06-04 16:08:00,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387839666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:00,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:00,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:00,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783568000] [2024-06-04 16:08:00,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:00,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:00,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:00,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:00,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:00,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:00,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 557 transitions, 7965 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:00,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:00,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:00,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:01,835 INFO L124 PetriNetUnfolderBase]: 3714/6328 cut-off events. [2024-06-04 16:08:01,835 INFO L125 PetriNetUnfolderBase]: For 755964/755964 co-relation queries the response was YES. [2024-06-04 16:08:01,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49339 conditions, 6328 events. 3714/6328 cut-off events. For 755964/755964 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44457 event pairs, 750 based on Foata normal form. 10/6332 useless extension candidates. Maximal degree in co-relation 49161. Up to 5439 conditions per place. [2024-06-04 16:08:01,931 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 111 changer transitions 0/579 dead transitions. [2024-06-04 16:08:01,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 579 transitions, 9193 flow [2024-06-04 16:08:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:01,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:01,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:08:01,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:08:01,933 INFO L175 Difference]: Start difference. First operand has 425 places, 557 transitions, 7965 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:08:01,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 579 transitions, 9193 flow [2024-06-04 16:08:05,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 579 transitions, 8932 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:05,873 INFO L231 Difference]: Finished difference. Result has 428 places, 557 transitions, 7932 flow [2024-06-04 16:08:05,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7704, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7932, PETRI_PLACES=428, PETRI_TRANSITIONS=557} [2024-06-04 16:08:05,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-04 16:08:05,885 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 557 transitions, 7932 flow [2024-06-04 16:08:05,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:05,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:05,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:05,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-04 16:08:05,885 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)] === [2024-06-04 16:08:05,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:05,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1650705070, now seen corresponding path program 14 times [2024-06-04 16:08:05,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:05,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756855180] [2024-06-04 16:08:05,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:05,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:06,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:06,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:06,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756855180] [2024-06-04 16:08:06,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756855180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:06,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:06,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:06,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045983935] [2024-06-04 16:08:06,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:06,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:06,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:06,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:06,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:06,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:06,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 557 transitions, 7932 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:06,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:06,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:06,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:07,634 INFO L124 PetriNetUnfolderBase]: 3691/6295 cut-off events. [2024-06-04 16:08:07,635 INFO L125 PetriNetUnfolderBase]: For 714532/714532 co-relation queries the response was YES. [2024-06-04 16:08:07,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47836 conditions, 6295 events. 3691/6295 cut-off events. For 714532/714532 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44257 event pairs, 741 based on Foata normal form. 10/6299 useless extension candidates. Maximal degree in co-relation 47657. Up to 5524 conditions per place. [2024-06-04 16:08:07,741 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 497 selfloop transitions, 74 changer transitions 0/578 dead transitions. [2024-06-04 16:08:07,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 578 transitions, 9154 flow [2024-06-04 16:08:07,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:08:07,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:08:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-04 16:08:07,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-04 16:08:07,742 INFO L175 Difference]: Start difference. First operand has 428 places, 557 transitions, 7932 flow. Second operand 10 states and 222 transitions. [2024-06-04 16:08:07,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 578 transitions, 9154 flow [2024-06-04 16:08:12,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 578 transitions, 8891 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-04 16:08:12,169 INFO L231 Difference]: Finished difference. Result has 430 places, 557 transitions, 7823 flow [2024-06-04 16:08:12,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7669, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7823, PETRI_PLACES=430, PETRI_TRANSITIONS=557} [2024-06-04 16:08:12,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-04 16:08:12,170 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 557 transitions, 7823 flow [2024-06-04 16:08:12,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:12,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:12,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:12,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-04 16:08:12,170 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)] === [2024-06-04 16:08:12,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:12,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1907205580, now seen corresponding path program 15 times [2024-06-04 16:08:12,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:12,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78754096] [2024-06-04 16:08:12,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:12,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:12,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:12,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:12,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78754096] [2024-06-04 16:08:12,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78754096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:12,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:12,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:12,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082133114] [2024-06-04 16:08:12,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:12,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:12,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:12,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:12,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:12,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:12,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 557 transitions, 7823 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:12,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:12,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:12,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:13,851 INFO L124 PetriNetUnfolderBase]: 3668/6262 cut-off events. [2024-06-04 16:08:13,851 INFO L125 PetriNetUnfolderBase]: For 672982/672982 co-relation queries the response was YES. [2024-06-04 16:08:13,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46436 conditions, 6262 events. 3668/6262 cut-off events. For 672982/672982 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 44046 event pairs, 732 based on Foata normal form. 10/6266 useless extension candidates. Maximal degree in co-relation 46256. Up to 5491 conditions per place. [2024-06-04 16:08:13,938 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 499 selfloop transitions, 70 changer transitions 0/576 dead transitions. [2024-06-04 16:08:13,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 576 transitions, 9037 flow [2024-06-04 16:08:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:13,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-04 16:08:13,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:08:13,939 INFO L175 Difference]: Start difference. First operand has 430 places, 557 transitions, 7823 flow. Second operand 8 states and 184 transitions. [2024-06-04 16:08:13,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 576 transitions, 9037 flow [2024-06-04 16:08:17,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 576 transitions, 8859 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-04 16:08:17,453 INFO L231 Difference]: Finished difference. Result has 430 places, 557 transitions, 7791 flow [2024-06-04 16:08:17,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7645, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7791, PETRI_PLACES=430, PETRI_TRANSITIONS=557} [2024-06-04 16:08:17,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-04 16:08:17,454 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 557 transitions, 7791 flow [2024-06-04 16:08:17,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:17,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:17,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:17,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-04 16:08:17,455 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)] === [2024-06-04 16:08:17,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:17,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1916728780, now seen corresponding path program 16 times [2024-06-04 16:08:17,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:17,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687634571] [2024-06-04 16:08:17,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:17,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:17,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:17,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:17,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687634571] [2024-06-04 16:08:17,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687634571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:17,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:17,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:17,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801412312] [2024-06-04 16:08:17,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:17,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:17,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:17,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:17,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:17,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:17,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 557 transitions, 7791 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:17,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:17,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:17,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:19,099 INFO L124 PetriNetUnfolderBase]: 3638/6212 cut-off events. [2024-06-04 16:08:19,100 INFO L125 PetriNetUnfolderBase]: For 628210/628210 co-relation queries the response was YES. [2024-06-04 16:08:19,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44931 conditions, 6212 events. 3638/6212 cut-off events. For 628210/628210 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 43635 event pairs, 702 based on Foata normal form. 10/6216 useless extension candidates. Maximal degree in co-relation 44750. Up to 5117 conditions per place. [2024-06-04 16:08:19,195 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 496 selfloop transitions, 77 changer transitions 0/580 dead transitions. [2024-06-04 16:08:19,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 580 transitions, 9053 flow [2024-06-04 16:08:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:08:19,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:08:19,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-04 16:08:19,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5565476190476191 [2024-06-04 16:08:19,197 INFO L175 Difference]: Start difference. First operand has 430 places, 557 transitions, 7791 flow. Second operand 8 states and 187 transitions. [2024-06-04 16:08:19,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 580 transitions, 9053 flow [2024-06-04 16:08:22,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 580 transitions, 8861 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-04 16:08:22,715 INFO L231 Difference]: Finished difference. Result has 432 places, 557 transitions, 7761 flow [2024-06-04 16:08:22,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7599, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7761, PETRI_PLACES=432, PETRI_TRANSITIONS=557} [2024-06-04 16:08:22,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-04 16:08:22,716 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 557 transitions, 7761 flow [2024-06-04 16:08:22,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:22,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:22,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:22,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-04 16:08:22,716 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)] === [2024-06-04 16:08:22,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:22,717 INFO L85 PathProgramCache]: Analyzing trace with hash 2093718568, now seen corresponding path program 1 times [2024-06-04 16:08:22,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:22,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495314233] [2024-06-04 16:08:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:22,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:22,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:22,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:22,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495314233] [2024-06-04 16:08:22,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495314233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:22,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:22,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:08:22,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993735367] [2024-06-04 16:08:22,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:22,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:08:22,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:22,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:08:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:08:22,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:22,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 557 transitions, 7761 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:22,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:22,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:22,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:24,255 INFO L124 PetriNetUnfolderBase]: 3646/6228 cut-off events. [2024-06-04 16:08:24,256 INFO L125 PetriNetUnfolderBase]: For 595806/595806 co-relation queries the response was YES. [2024-06-04 16:08:24,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44950 conditions, 6228 events. 3646/6228 cut-off events. For 595806/595806 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 43835 event pairs, 718 based on Foata normal form. 2/6224 useless extension candidates. Maximal degree in co-relation 44768. Up to 5530 conditions per place. [2024-06-04 16:08:24,355 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 515 selfloop transitions, 52 changer transitions 0/574 dead transitions. [2024-06-04 16:08:24,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 574 transitions, 8985 flow [2024-06-04 16:08:24,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:24,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:24,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-04 16:08:24,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:08:24,357 INFO L175 Difference]: Start difference. First operand has 432 places, 557 transitions, 7761 flow. Second operand 7 states and 161 transitions. [2024-06-04 16:08:24,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 574 transitions, 8985 flow [2024-06-04 16:08:27,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 574 transitions, 8808 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-04 16:08:27,944 INFO L231 Difference]: Finished difference. Result has 432 places, 559 transitions, 7751 flow [2024-06-04 16:08:27,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7584, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7751, PETRI_PLACES=432, PETRI_TRANSITIONS=559} [2024-06-04 16:08:27,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-04 16:08:27,945 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 559 transitions, 7751 flow [2024-06-04 16:08:27,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:27,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:27,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:27,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-04 16:08:27,945 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)] === [2024-06-04 16:08:27,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:27,946 INFO L85 PathProgramCache]: Analyzing trace with hash 2094223558, now seen corresponding path program 2 times [2024-06-04 16:08:27,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:27,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077271237] [2024-06-04 16:08:27,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:27,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:28,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:28,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077271237] [2024-06-04 16:08:28,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077271237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:28,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:28,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:08:28,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488189521] [2024-06-04 16:08:28,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:28,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:08:28,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:28,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:08:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:08:28,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:28,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 559 transitions, 7751 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:28,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:28,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:28,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:29,475 INFO L124 PetriNetUnfolderBase]: 3654/6236 cut-off events. [2024-06-04 16:08:29,476 INFO L125 PetriNetUnfolderBase]: For 605381/605381 co-relation queries the response was YES. [2024-06-04 16:08:29,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45003 conditions, 6236 events. 3654/6236 cut-off events. For 605381/605381 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 43790 event pairs, 712 based on Foata normal form. 2/6232 useless extension candidates. Maximal degree in co-relation 44820. Up to 5522 conditions per place. [2024-06-04 16:08:29,590 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 516 selfloop transitions, 54 changer transitions 0/577 dead transitions. [2024-06-04 16:08:29,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 577 transitions, 8987 flow [2024-06-04 16:08:29,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:29,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-04 16:08:29,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:08:29,591 INFO L175 Difference]: Start difference. First operand has 432 places, 559 transitions, 7751 flow. Second operand 7 states and 161 transitions. [2024-06-04 16:08:29,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 577 transitions, 8987 flow [2024-06-04 16:08:32,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 577 transitions, 8816 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:32,921 INFO L231 Difference]: Finished difference. Result has 434 places, 561 transitions, 7755 flow [2024-06-04 16:08:32,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7580, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7755, PETRI_PLACES=434, PETRI_TRANSITIONS=561} [2024-06-04 16:08:32,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-04 16:08:32,922 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 561 transitions, 7755 flow [2024-06-04 16:08:32,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:32,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:32,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:32,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-04 16:08:32,922 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)] === [2024-06-04 16:08:32,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:32,923 INFO L85 PathProgramCache]: Analyzing trace with hash 714949772, now seen corresponding path program 17 times [2024-06-04 16:08:32,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:32,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254506034] [2024-06-04 16:08:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:32,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:33,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:33,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254506034] [2024-06-04 16:08:33,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254506034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:33,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:33,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:33,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370494268] [2024-06-04 16:08:33,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:33,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:33,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:33,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:33,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:33,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:33,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 561 transitions, 7755 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:33,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:33,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:33,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:34,557 INFO L124 PetriNetUnfolderBase]: 3631/6203 cut-off events. [2024-06-04 16:08:34,557 INFO L125 PetriNetUnfolderBase]: For 582148/582151 co-relation queries the response was YES. [2024-06-04 16:08:34,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43308 conditions, 6203 events. 3631/6203 cut-off events. For 582148/582151 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 43685 event pairs, 702 based on Foata normal form. 12/6204 useless extension candidates. Maximal degree in co-relation 43124. Up to 5318 conditions per place. [2024-06-04 16:08:34,648 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 131 changer transitions 0/599 dead transitions. [2024-06-04 16:08:34,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 599 transitions, 9065 flow [2024-06-04 16:08:34,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:08:34,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:08:34,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-04 16:08:34,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-04 16:08:34,649 INFO L175 Difference]: Start difference. First operand has 434 places, 561 transitions, 7755 flow. Second operand 9 states and 226 transitions. [2024-06-04 16:08:34,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 599 transitions, 9065 flow [2024-06-04 16:08:37,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 599 transitions, 8876 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-04 16:08:37,345 INFO L231 Difference]: Finished difference. Result has 438 places, 561 transitions, 7843 flow [2024-06-04 16:08:37,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7566, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7843, PETRI_PLACES=438, PETRI_TRANSITIONS=561} [2024-06-04 16:08:37,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-04 16:08:37,346 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 561 transitions, 7843 flow [2024-06-04 16:08:37,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:37,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:37,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:37,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-04 16:08:37,347 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)] === [2024-06-04 16:08:37,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:37,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1740409996, now seen corresponding path program 18 times [2024-06-04 16:08:37,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:37,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107631146] [2024-06-04 16:08:37,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:37,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:37,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:37,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107631146] [2024-06-04 16:08:37,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107631146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:37,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:37,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:37,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870747188] [2024-06-04 16:08:37,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:37,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:37,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:37,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:37,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:37,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:37,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 561 transitions, 7843 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:37,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:37,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:37,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:39,003 INFO L124 PetriNetUnfolderBase]: 3608/6175 cut-off events. [2024-06-04 16:08:39,003 INFO L125 PetriNetUnfolderBase]: For 533534/533534 co-relation queries the response was YES. [2024-06-04 16:08:39,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42044 conditions, 6175 events. 3608/6175 cut-off events. For 533534/533534 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 43502 event pairs, 697 based on Foata normal form. 10/6179 useless extension candidates. Maximal degree in co-relation 41859. Up to 5253 conditions per place. [2024-06-04 16:08:39,098 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 123 changer transitions 0/596 dead transitions. [2024-06-04 16:08:39,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 596 transitions, 9139 flow [2024-06-04 16:08:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:08:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:08:39,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-04 16:08:39,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:08:39,099 INFO L175 Difference]: Start difference. First operand has 438 places, 561 transitions, 7843 flow. Second operand 9 states and 222 transitions. [2024-06-04 16:08:39,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 596 transitions, 9139 flow [2024-06-04 16:08:42,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 596 transitions, 8837 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-04 16:08:42,824 INFO L231 Difference]: Finished difference. Result has 438 places, 561 transitions, 7803 flow [2024-06-04 16:08:42,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7541, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7803, PETRI_PLACES=438, PETRI_TRANSITIONS=561} [2024-06-04 16:08:42,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-04 16:08:42,825 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 561 transitions, 7803 flow [2024-06-04 16:08:42,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:42,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:42,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:42,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-04 16:08:42,825 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)] === [2024-06-04 16:08:42,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:42,826 INFO L85 PathProgramCache]: Analyzing trace with hash 423818834, now seen corresponding path program 19 times [2024-06-04 16:08:42,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:42,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984052531] [2024-06-04 16:08:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:42,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:43,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:43,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984052531] [2024-06-04 16:08:43,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984052531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:43,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:43,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:43,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620588280] [2024-06-04 16:08:43,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:43,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:43,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:43,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:43,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:43,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:43,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 561 transitions, 7803 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:43,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:43,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:43,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:44,415 INFO L124 PetriNetUnfolderBase]: 3585/6142 cut-off events. [2024-06-04 16:08:44,416 INFO L125 PetriNetUnfolderBase]: For 467297/467297 co-relation queries the response was YES. [2024-06-04 16:08:44,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40489 conditions, 6142 events. 3585/6142 cut-off events. For 467297/467297 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 43374 event pairs, 688 based on Foata normal form. 10/6146 useless extension candidates. Maximal degree in co-relation 40304. Up to 5226 conditions per place. [2024-06-04 16:08:44,510 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 472 selfloop transitions, 109 changer transitions 0/588 dead transitions. [2024-06-04 16:08:44,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 588 transitions, 9063 flow [2024-06-04 16:08:44,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:44,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-04 16:08:44,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-04 16:08:44,511 INFO L175 Difference]: Start difference. First operand has 438 places, 561 transitions, 7803 flow. Second operand 7 states and 176 transitions. [2024-06-04 16:08:44,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 588 transitions, 9063 flow [2024-06-04 16:08:47,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 588 transitions, 8773 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-04 16:08:47,640 INFO L231 Difference]: Finished difference. Result has 435 places, 561 transitions, 7744 flow [2024-06-04 16:08:47,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7513, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7744, PETRI_PLACES=435, PETRI_TRANSITIONS=561} [2024-06-04 16:08:47,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-04 16:08:47,640 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 561 transitions, 7744 flow [2024-06-04 16:08:47,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:47,641 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:47,641 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:47,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-04 16:08:47,641 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)] === [2024-06-04 16:08:47,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:47,641 INFO L85 PathProgramCache]: Analyzing trace with hash 433342034, now seen corresponding path program 20 times [2024-06-04 16:08:47,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:47,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795464524] [2024-06-04 16:08:47,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:47,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:47,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:47,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795464524] [2024-06-04 16:08:47,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795464524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:47,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:47,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:08:47,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769423354] [2024-06-04 16:08:47,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:47,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:08:47,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:47,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:08:47,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:08:47,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:47,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 561 transitions, 7744 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:47,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:47,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:47,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:49,171 INFO L124 PetriNetUnfolderBase]: 3555/6105 cut-off events. [2024-06-04 16:08:49,172 INFO L125 PetriNetUnfolderBase]: For 402840/402840 co-relation queries the response was YES. [2024-06-04 16:08:49,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38826 conditions, 6105 events. 3555/6105 cut-off events. For 402840/402840 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 43014 event pairs, 550 based on Foata normal form. 10/6109 useless extension candidates. Maximal degree in co-relation 38642. Up to 4335 conditions per place. [2024-06-04 16:08:49,267 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 454 selfloop transitions, 131 changer transitions 0/592 dead transitions. [2024-06-04 16:08:49,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 592 transitions, 9052 flow [2024-06-04 16:08:49,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:08:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:08:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-04 16:08:49,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-04 16:08:49,269 INFO L175 Difference]: Start difference. First operand has 435 places, 561 transitions, 7744 flow. Second operand 7 states and 179 transitions. [2024-06-04 16:08:49,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 592 transitions, 9052 flow [2024-06-04 16:08:52,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 592 transitions, 8791 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-04 16:08:52,296 INFO L231 Difference]: Finished difference. Result has 435 places, 561 transitions, 7763 flow [2024-06-04 16:08:52,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7483, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7763, PETRI_PLACES=435, PETRI_TRANSITIONS=561} [2024-06-04 16:08:52,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-04 16:08:52,297 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 561 transitions, 7763 flow [2024-06-04 16:08:52,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:52,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:52,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:52,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-04 16:08:52,297 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)] === [2024-06-04 16:08:52,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:52,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1982213190, now seen corresponding path program 3 times [2024-06-04 16:08:52,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:52,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734612261] [2024-06-04 16:08:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:52,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:52,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:52,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:52,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734612261] [2024-06-04 16:08:52,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734612261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:52,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:52,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:08:52,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567564594] [2024-06-04 16:08:52,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:52,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:08:52,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:52,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:08:52,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:08:52,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:52,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 561 transitions, 7763 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:52,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:52,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:52,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:53,854 INFO L124 PetriNetUnfolderBase]: 3563/6109 cut-off events. [2024-06-04 16:08:53,855 INFO L125 PetriNetUnfolderBase]: For 361829/361829 co-relation queries the response was YES. [2024-06-04 16:08:53,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39145 conditions, 6109 events. 3563/6109 cut-off events. For 361829/361829 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 43081 event pairs, 681 based on Foata normal form. 2/6105 useless extension candidates. Maximal degree in co-relation 38961. Up to 5403 conditions per place. [2024-06-04 16:08:53,939 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 516 selfloop transitions, 57 changer transitions 0/580 dead transitions. [2024-06-04 16:08:53,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 580 transitions, 9013 flow [2024-06-04 16:08:53,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:08:53,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:08:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-04 16:08:53,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-04 16:08:53,940 INFO L175 Difference]: Start difference. First operand has 435 places, 561 transitions, 7763 flow. Second operand 6 states and 145 transitions. [2024-06-04 16:08:53,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 580 transitions, 9013 flow [2024-06-04 16:08:56,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 580 transitions, 8667 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-04 16:08:56,800 INFO L231 Difference]: Finished difference. Result has 433 places, 563 transitions, 7605 flow [2024-06-04 16:08:56,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7417, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7605, PETRI_PLACES=433, PETRI_TRANSITIONS=563} [2024-06-04 16:08:56,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-04 16:08:56,800 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 563 transitions, 7605 flow [2024-06-04 16:08:56,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:56,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:08:56,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:08:56,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-04 16:08:56,801 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)] === [2024-06-04 16:08:56,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:08:56,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1966976070, now seen corresponding path program 4 times [2024-06-04 16:08:56,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:08:56,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720207397] [2024-06-04 16:08:56,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:08:56,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:08:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:08:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:08:57,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:08:57,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720207397] [2024-06-04 16:08:57,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720207397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:08:57,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:08:57,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:08:57,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345441274] [2024-06-04 16:08:57,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:08:57,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:08:57,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:08:57,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:08:57,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:08:57,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:08:57,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 563 transitions, 7605 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:08:57,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:08:57,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:08:57,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:08:58,292 INFO L124 PetriNetUnfolderBase]: 3571/6109 cut-off events. [2024-06-04 16:08:58,293 INFO L125 PetriNetUnfolderBase]: For 358864/358864 co-relation queries the response was YES. [2024-06-04 16:08:58,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38591 conditions, 6109 events. 3571/6109 cut-off events. For 358864/358864 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 43055 event pairs, 667 based on Foata normal form. 2/6105 useless extension candidates. Maximal degree in co-relation 38407. Up to 5353 conditions per place. [2024-06-04 16:08:58,383 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 511 selfloop transitions, 63 changer transitions 0/581 dead transitions. [2024-06-04 16:08:58,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 581 transitions, 8870 flow [2024-06-04 16:08:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:08:58,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:08:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-04 16:08:58,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:08:58,384 INFO L175 Difference]: Start difference. First operand has 433 places, 563 transitions, 7605 flow. Second operand 6 states and 141 transitions. [2024-06-04 16:08:58,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 581 transitions, 8870 flow [2024-06-04 16:09:00,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 581 transitions, 8698 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-04 16:09:00,772 INFO L231 Difference]: Finished difference. Result has 436 places, 566 transitions, 7676 flow [2024-06-04 16:09:00,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7437, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7676, PETRI_PLACES=436, PETRI_TRANSITIONS=566} [2024-06-04 16:09:00,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-04 16:09:00,772 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 566 transitions, 7676 flow [2024-06-04 16:09:00,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:00,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:00,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:00,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-04 16:09:00,773 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)] === [2024-06-04 16:09:00,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:00,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1911914298, now seen corresponding path program 5 times [2024-06-04 16:09:00,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:00,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555692691] [2024-06-04 16:09:00,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:00,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:00,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:01,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:01,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:01,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555692691] [2024-06-04 16:09:01,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555692691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:01,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:01,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:09:01,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521534226] [2024-06-04 16:09:01,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:01,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:09:01,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:01,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:09:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:09:01,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:01,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 566 transitions, 7676 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:01,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:01,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:01,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:02,210 INFO L124 PetriNetUnfolderBase]: 3579/6122 cut-off events. [2024-06-04 16:09:02,210 INFO L125 PetriNetUnfolderBase]: For 360315/360318 co-relation queries the response was YES. [2024-06-04 16:09:02,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38789 conditions, 6122 events. 3579/6122 cut-off events. For 360315/360318 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 43232 event pairs, 636 based on Foata normal form. 4/6118 useless extension candidates. Maximal degree in co-relation 38603. Up to 5296 conditions per place. [2024-06-04 16:09:02,299 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 509 selfloop transitions, 70 changer transitions 0/586 dead transitions. [2024-06-04 16:09:02,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 586 transitions, 9226 flow [2024-06-04 16:09:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:09:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:09:02,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-04 16:09:02,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-04 16:09:02,300 INFO L175 Difference]: Start difference. First operand has 436 places, 566 transitions, 7676 flow. Second operand 6 states and 139 transitions. [2024-06-04 16:09:02,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 586 transitions, 9226 flow [2024-06-04 16:09:05,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 586 transitions, 9044 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-04 16:09:05,016 INFO L231 Difference]: Finished difference. Result has 441 places, 572 transitions, 7844 flow [2024-06-04 16:09:05,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7504, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7844, PETRI_PLACES=441, PETRI_TRANSITIONS=572} [2024-06-04 16:09:05,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-04 16:09:05,017 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 572 transitions, 7844 flow [2024-06-04 16:09:05,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:05,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:05,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:05,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-04 16:09:05,018 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)] === [2024-06-04 16:09:05,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:05,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1800282626, now seen corresponding path program 6 times [2024-06-04 16:09:05,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:05,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77428899] [2024-06-04 16:09:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:05,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:05,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:05,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77428899] [2024-06-04 16:09:05,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77428899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:05,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:05,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-04 16:09:05,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146854021] [2024-06-04 16:09:05,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:05,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-04 16:09:05,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:05,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-04 16:09:05,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-04 16:09:05,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:05,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 572 transitions, 7844 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:05,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:05,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:05,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:06,566 INFO L124 PetriNetUnfolderBase]: 3574/6115 cut-off events. [2024-06-04 16:09:06,566 INFO L125 PetriNetUnfolderBase]: For 349032/349035 co-relation queries the response was YES. [2024-06-04 16:09:06,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38600 conditions, 6115 events. 3574/6115 cut-off events. For 349032/349035 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 43136 event pairs, 636 based on Foata normal form. 4/6111 useless extension candidates. Maximal degree in co-relation 38411. Up to 5292 conditions per place. [2024-06-04 16:09:06,656 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 510 selfloop transitions, 69 changer transitions 0/586 dead transitions. [2024-06-04 16:09:06,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 586 transitions, 9071 flow [2024-06-04 16:09:06,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:09:06,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:09:06,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-04 16:09:06,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:09:06,657 INFO L175 Difference]: Start difference. First operand has 441 places, 572 transitions, 7844 flow. Second operand 6 states and 138 transitions. [2024-06-04 16:09:06,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 586 transitions, 9071 flow [2024-06-04 16:09:09,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 586 transitions, 8821 flow, removed 82 selfloop flow, removed 2 redundant places. [2024-06-04 16:09:09,549 INFO L231 Difference]: Finished difference. Result has 445 places, 573 transitions, 7776 flow [2024-06-04 16:09:09,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7626, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7776, PETRI_PLACES=445, PETRI_TRANSITIONS=573} [2024-06-04 16:09:09,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-04 16:09:09,550 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 573 transitions, 7776 flow [2024-06-04 16:09:09,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:09,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:09,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:09,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-04 16:09:09,550 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)] === [2024-06-04 16:09:09,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:09,551 INFO L85 PathProgramCache]: Analyzing trace with hash 116034953, now seen corresponding path program 1 times [2024-06-04 16:09:09,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:09,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841313471] [2024-06-04 16:09:09,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:09,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:09,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:09,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841313471] [2024-06-04 16:09:09,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841313471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:09,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:09,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:09,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25212660] [2024-06-04 16:09:09,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:09,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:09,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:09,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:09,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:09,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:09,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 573 transitions, 7776 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:09,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:09,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:09,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:11,159 INFO L124 PetriNetUnfolderBase]: 3571/6115 cut-off events. [2024-06-04 16:09:11,159 INFO L125 PetriNetUnfolderBase]: For 340271/340271 co-relation queries the response was YES. [2024-06-04 16:09:11,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38287 conditions, 6115 events. 3571/6115 cut-off events. For 340271/340271 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 43217 event pairs, 697 based on Foata normal form. 1/6107 useless extension candidates. Maximal degree in co-relation 38097. Up to 5148 conditions per place. [2024-06-04 16:09:11,266 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 164 changer transitions 0/591 dead transitions. [2024-06-04 16:09:11,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 591 transitions, 9198 flow [2024-06-04 16:09:11,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:09:11,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:09:11,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-04 16:09:11,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-04 16:09:11,267 INFO L175 Difference]: Start difference. First operand has 445 places, 573 transitions, 7776 flow. Second operand 7 states and 173 transitions. [2024-06-04 16:09:11,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 591 transitions, 9198 flow [2024-06-04 16:09:14,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 591 transitions, 9091 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-04 16:09:14,159 INFO L231 Difference]: Finished difference. Result has 450 places, 573 transitions, 8012 flow [2024-06-04 16:09:14,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7669, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8012, PETRI_PLACES=450, PETRI_TRANSITIONS=573} [2024-06-04 16:09:14,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-04 16:09:14,160 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 573 transitions, 8012 flow [2024-06-04 16:09:14,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:14,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:14,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:14,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-04 16:09:14,160 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)] === [2024-06-04 16:09:14,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:14,161 INFO L85 PathProgramCache]: Analyzing trace with hash 457085379, now seen corresponding path program 2 times [2024-06-04 16:09:14,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:14,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511101174] [2024-06-04 16:09:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:14,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:14,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:14,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511101174] [2024-06-04 16:09:14,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511101174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:14,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:14,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:14,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619769688] [2024-06-04 16:09:14,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:14,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:14,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:14,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:14,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:14,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:14,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 573 transitions, 8012 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:14,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:14,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:14,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:15,705 INFO L124 PetriNetUnfolderBase]: 3576/6124 cut-off events. [2024-06-04 16:09:15,705 INFO L125 PetriNetUnfolderBase]: For 347099/347099 co-relation queries the response was YES. [2024-06-04 16:09:15,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38647 conditions, 6124 events. 3576/6124 cut-off events. For 347099/347099 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 43300 event pairs, 697 based on Foata normal form. 1/6116 useless extension candidates. Maximal degree in co-relation 38456. Up to 5311 conditions per place. [2024-06-04 16:09:15,816 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 476 selfloop transitions, 108 changer transitions 0/591 dead transitions. [2024-06-04 16:09:15,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 591 transitions, 9480 flow [2024-06-04 16:09:15,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:09:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:09:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:09:15,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-04 16:09:15,817 INFO L175 Difference]: Start difference. First operand has 450 places, 573 transitions, 8012 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:09:15,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 591 transitions, 9480 flow [2024-06-04 16:09:18,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 591 transitions, 9110 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 16:09:18,361 INFO L231 Difference]: Finished difference. Result has 451 places, 576 transitions, 7927 flow [2024-06-04 16:09:18,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7653, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7927, PETRI_PLACES=451, PETRI_TRANSITIONS=576} [2024-06-04 16:09:18,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-04 16:09:18,362 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 576 transitions, 7927 flow [2024-06-04 16:09:18,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:18,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:18,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:18,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-04 16:09:18,362 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)] === [2024-06-04 16:09:18,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:18,363 INFO L85 PathProgramCache]: Analyzing trace with hash -835327083, now seen corresponding path program 3 times [2024-06-04 16:09:18,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:18,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810235675] [2024-06-04 16:09:18,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:18,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:18,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:18,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:18,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810235675] [2024-06-04 16:09:18,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810235675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:18,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:18,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:18,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228956505] [2024-06-04 16:09:18,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:18,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:18,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:18,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:18,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:18,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 576 transitions, 7927 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:18,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:18,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:18,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:19,846 INFO L124 PetriNetUnfolderBase]: 3573/6120 cut-off events. [2024-06-04 16:09:19,847 INFO L125 PetriNetUnfolderBase]: For 341189/341189 co-relation queries the response was YES. [2024-06-04 16:09:19,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38238 conditions, 6120 events. 3573/6120 cut-off events. For 341189/341189 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 43227 event pairs, 697 based on Foata normal form. 1/6112 useless extension candidates. Maximal degree in co-relation 38048. Up to 5308 conditions per place. [2024-06-04 16:09:19,940 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 470 selfloop transitions, 115 changer transitions 0/592 dead transitions. [2024-06-04 16:09:19,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 592 transitions, 9135 flow [2024-06-04 16:09:19,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:09:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:09:19,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-04 16:09:19,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5502645502645502 [2024-06-04 16:09:19,941 INFO L175 Difference]: Start difference. First operand has 451 places, 576 transitions, 7927 flow. Second operand 9 states and 208 transitions. [2024-06-04 16:09:19,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 592 transitions, 9135 flow [2024-06-04 16:09:22,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 592 transitions, 8945 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-04 16:09:22,448 INFO L231 Difference]: Finished difference. Result has 456 places, 576 transitions, 7978 flow [2024-06-04 16:09:22,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7737, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7978, PETRI_PLACES=456, PETRI_TRANSITIONS=576} [2024-06-04 16:09:22,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 413 predicate places. [2024-06-04 16:09:22,449 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 576 transitions, 7978 flow [2024-06-04 16:09:22,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:22,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:22,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:22,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-04 16:09:22,449 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)] === [2024-06-04 16:09:22,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:22,450 INFO L85 PathProgramCache]: Analyzing trace with hash -677458983, now seen corresponding path program 4 times [2024-06-04 16:09:22,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:22,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846112018] [2024-06-04 16:09:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:22,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:22,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:22,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846112018] [2024-06-04 16:09:22,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846112018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:22,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:22,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:22,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710840392] [2024-06-04 16:09:22,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:22,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:22,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:22,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:22,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:22,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:22,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 576 transitions, 7978 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:22,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:22,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:22,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:24,035 INFO L124 PetriNetUnfolderBase]: 3578/6129 cut-off events. [2024-06-04 16:09:24,035 INFO L125 PetriNetUnfolderBase]: For 347013/347013 co-relation queries the response was YES. [2024-06-04 16:09:24,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38373 conditions, 6129 events. 3578/6129 cut-off events. For 347013/347013 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 43307 event pairs, 694 based on Foata normal form. 1/6121 useless extension candidates. Maximal degree in co-relation 38182. Up to 5193 conditions per place. [2024-06-04 16:09:24,124 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 407 selfloop transitions, 186 changer transitions 0/600 dead transitions. [2024-06-04 16:09:24,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 600 transitions, 9471 flow [2024-06-04 16:09:24,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:09:24,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:09:24,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-04 16:09:24,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-04 16:09:24,125 INFO L175 Difference]: Start difference. First operand has 456 places, 576 transitions, 7978 flow. Second operand 10 states and 232 transitions. [2024-06-04 16:09:24,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 600 transitions, 9471 flow [2024-06-04 16:09:26,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 600 transitions, 9217 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-04 16:09:26,922 INFO L231 Difference]: Finished difference. Result has 458 places, 579 transitions, 8150 flow [2024-06-04 16:09:26,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7724, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8150, PETRI_PLACES=458, PETRI_TRANSITIONS=579} [2024-06-04 16:09:26,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 415 predicate places. [2024-06-04 16:09:26,923 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 579 transitions, 8150 flow [2024-06-04 16:09:26,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:26,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:26,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:26,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-04 16:09:26,923 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)] === [2024-06-04 16:09:26,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:26,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1121441999, now seen corresponding path program 5 times [2024-06-04 16:09:26,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:26,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829891456] [2024-06-04 16:09:26,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:26,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:26,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:27,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:27,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:27,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829891456] [2024-06-04 16:09:27,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829891456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:27,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:27,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:27,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323082192] [2024-06-04 16:09:27,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:27,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:27,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:27,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:27,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:27,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:27,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 579 transitions, 8150 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:27,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:27,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:27,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:28,589 INFO L124 PetriNetUnfolderBase]: 3583/6138 cut-off events. [2024-06-04 16:09:28,589 INFO L125 PetriNetUnfolderBase]: For 353250/353250 co-relation queries the response was YES. [2024-06-04 16:09:28,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38674 conditions, 6138 events. 3583/6138 cut-off events. For 353250/353250 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 43385 event pairs, 697 based on Foata normal form. 1/6130 useless extension candidates. Maximal degree in co-relation 38482. Up to 5199 conditions per place. [2024-06-04 16:09:28,671 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 414 selfloop transitions, 180 changer transitions 0/601 dead transitions. [2024-06-04 16:09:28,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 601 transitions, 9649 flow [2024-06-04 16:09:28,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:09:28,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:09:28,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:09:28,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:09:28,672 INFO L175 Difference]: Start difference. First operand has 458 places, 579 transitions, 8150 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:09:28,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 601 transitions, 9649 flow [2024-06-04 16:09:31,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 601 transitions, 9203 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-04 16:09:31,384 INFO L231 Difference]: Finished difference. Result has 457 places, 582 transitions, 8135 flow [2024-06-04 16:09:31,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7712, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8135, PETRI_PLACES=457, PETRI_TRANSITIONS=582} [2024-06-04 16:09:31,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-04 16:09:31,384 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 582 transitions, 8135 flow [2024-06-04 16:09:31,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:31,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:31,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:31,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-04 16:09:31,385 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:09:31,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:31,385 INFO L85 PathProgramCache]: Analyzing trace with hash -684816213, now seen corresponding path program 6 times [2024-06-04 16:09:31,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:31,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508695655] [2024-06-04 16:09:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:31,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:31,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:31,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508695655] [2024-06-04 16:09:31,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508695655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:31,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:31,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:09:31,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363546454] [2024-06-04 16:09:31,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:31,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:09:31,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:31,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:09:31,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:09:31,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:31,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 582 transitions, 8135 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:31,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:31,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:31,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:32,904 INFO L124 PetriNetUnfolderBase]: 3580/6134 cut-off events. [2024-06-04 16:09:32,904 INFO L125 PetriNetUnfolderBase]: For 346724/346724 co-relation queries the response was YES. [2024-06-04 16:09:32,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38510 conditions, 6134 events. 3580/6134 cut-off events. For 346724/346724 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 43372 event pairs, 697 based on Foata normal form. 1/6126 useless extension candidates. Maximal degree in co-relation 38318. Up to 5196 conditions per place. [2024-06-04 16:09:32,996 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 427 selfloop transitions, 164 changer transitions 0/598 dead transitions. [2024-06-04 16:09:32,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 598 transitions, 9357 flow [2024-06-04 16:09:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:09:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:09:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-04 16:09:32,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-04 16:09:32,997 INFO L175 Difference]: Start difference. First operand has 457 places, 582 transitions, 8135 flow. Second operand 6 states and 151 transitions. [2024-06-04 16:09:32,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 598 transitions, 9357 flow [2024-06-04 16:09:35,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 598 transitions, 8954 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-04 16:09:35,796 INFO L231 Difference]: Finished difference. Result has 455 places, 582 transitions, 8090 flow [2024-06-04 16:09:35,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7732, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8090, PETRI_PLACES=455, PETRI_TRANSITIONS=582} [2024-06-04 16:09:35,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-04 16:09:35,796 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 582 transitions, 8090 flow [2024-06-04 16:09:35,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:35,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:35,797 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, 1, 1] [2024-06-04 16:09:35,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-04 16:09:35,797 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)] === [2024-06-04 16:09:35,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:35,797 INFO L85 PathProgramCache]: Analyzing trace with hash -2136271835, now seen corresponding path program 7 times [2024-06-04 16:09:35,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:35,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571470766] [2024-06-04 16:09:35,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:35,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:35,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:36,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:36,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571470766] [2024-06-04 16:09:36,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571470766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:36,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:36,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:36,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848300013] [2024-06-04 16:09:36,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:36,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:36,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:36,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:36,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:36,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:36,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 582 transitions, 8090 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:36,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:36,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:36,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:37,409 INFO L124 PetriNetUnfolderBase]: 3609/6187 cut-off events. [2024-06-04 16:09:37,409 INFO L125 PetriNetUnfolderBase]: For 358789/358789 co-relation queries the response was YES. [2024-06-04 16:09:37,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38920 conditions, 6187 events. 3609/6187 cut-off events. For 358789/358789 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 43805 event pairs, 685 based on Foata normal form. 1/6182 useless extension candidates. Maximal degree in co-relation 38729. Up to 4887 conditions per place. [2024-06-04 16:09:37,505 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 323 selfloop transitions, 302 changer transitions 0/632 dead transitions. [2024-06-04 16:09:37,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 632 transitions, 10016 flow [2024-06-04 16:09:37,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:09:37,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:09:37,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 261 transitions. [2024-06-04 16:09:37,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564935064935065 [2024-06-04 16:09:37,507 INFO L175 Difference]: Start difference. First operand has 455 places, 582 transitions, 8090 flow. Second operand 11 states and 261 transitions. [2024-06-04 16:09:37,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 632 transitions, 10016 flow [2024-06-04 16:09:40,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 632 transitions, 9645 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:40,691 INFO L231 Difference]: Finished difference. Result has 459 places, 594 transitions, 8493 flow [2024-06-04 16:09:40,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7727, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8493, PETRI_PLACES=459, PETRI_TRANSITIONS=594} [2024-06-04 16:09:40,691 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-04 16:09:40,691 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 594 transitions, 8493 flow [2024-06-04 16:09:40,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:40,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:40,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:40,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-04 16:09:40,692 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)] === [2024-06-04 16:09:40,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:40,692 INFO L85 PathProgramCache]: Analyzing trace with hash -492882551, now seen corresponding path program 8 times [2024-06-04 16:09:40,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:40,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335176906] [2024-06-04 16:09:40,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:40,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:40,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:40,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335176906] [2024-06-04 16:09:40,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335176906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:40,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:40,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:40,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547748082] [2024-06-04 16:09:40,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:40,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:40,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:40,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:40,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:40,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:40,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 594 transitions, 8493 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:40,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:40,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:40,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:42,208 INFO L124 PetriNetUnfolderBase]: 3606/6183 cut-off events. [2024-06-04 16:09:42,209 INFO L125 PetriNetUnfolderBase]: For 348928/348928 co-relation queries the response was YES. [2024-06-04 16:09:42,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39104 conditions, 6183 events. 3606/6183 cut-off events. For 348928/348928 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 43777 event pairs, 685 based on Foata normal form. 1/6178 useless extension candidates. Maximal degree in co-relation 38914. Up to 4884 conditions per place. [2024-06-04 16:09:42,300 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 278 changer transitions 0/628 dead transitions. [2024-06-04 16:09:42,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 628 transitions, 10243 flow [2024-06-04 16:09:42,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:09:42,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:09:42,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-04 16:09:42,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:09:42,301 INFO L175 Difference]: Start difference. First operand has 459 places, 594 transitions, 8493 flow. Second operand 10 states and 240 transitions. [2024-06-04 16:09:42,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 628 transitions, 10243 flow [2024-06-04 16:09:45,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 628 transitions, 9795 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:45,626 INFO L231 Difference]: Finished difference. Result has 462 places, 594 transitions, 8608 flow [2024-06-04 16:09:45,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8045, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8608, PETRI_PLACES=462, PETRI_TRANSITIONS=594} [2024-06-04 16:09:45,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-04 16:09:45,627 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 594 transitions, 8608 flow [2024-06-04 16:09:45,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:45,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:45,627 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] [2024-06-04 16:09:45,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-04 16:09:45,627 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)] === [2024-06-04 16:09:45,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:45,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1715246763, now seen corresponding path program 9 times [2024-06-04 16:09:45,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:45,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778261604] [2024-06-04 16:09:45,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:45,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:45,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:45,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:45,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:45,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778261604] [2024-06-04 16:09:45,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778261604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:45,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:45,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:45,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893526731] [2024-06-04 16:09:45,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:45,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:45,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:45,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:45,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:45,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:45,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 594 transitions, 8608 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:45,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:45,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:45,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:47,260 INFO L124 PetriNetUnfolderBase]: 3611/6192 cut-off events. [2024-06-04 16:09:47,261 INFO L125 PetriNetUnfolderBase]: For 356213/356213 co-relation queries the response was YES. [2024-06-04 16:09:47,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39252 conditions, 6192 events. 3611/6192 cut-off events. For 356213/356213 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 43853 event pairs, 685 based on Foata normal form. 1/6187 useless extension candidates. Maximal degree in co-relation 39061. Up to 4890 conditions per place. [2024-06-04 16:09:47,348 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 313 selfloop transitions, 313 changer transitions 0/633 dead transitions. [2024-06-04 16:09:47,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 633 transitions, 10419 flow [2024-06-04 16:09:47,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:09:47,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:09:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 278 transitions. [2024-06-04 16:09:47,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5515873015873016 [2024-06-04 16:09:47,355 INFO L175 Difference]: Start difference. First operand has 462 places, 594 transitions, 8608 flow. Second operand 12 states and 278 transitions. [2024-06-04 16:09:47,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 633 transitions, 10419 flow [2024-06-04 16:09:50,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 633 transitions, 9794 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 16:09:50,203 INFO L231 Difference]: Finished difference. Result has 467 places, 597 transitions, 8661 flow [2024-06-04 16:09:50,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7992, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8661, PETRI_PLACES=467, PETRI_TRANSITIONS=597} [2024-06-04 16:09:50,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-04 16:09:50,203 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 597 transitions, 8661 flow [2024-06-04 16:09:50,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:50,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:50,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:50,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-04 16:09:50,204 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)] === [2024-06-04 16:09:50,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:50,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1811144765, now seen corresponding path program 10 times [2024-06-04 16:09:50,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:50,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150439964] [2024-06-04 16:09:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:50,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:50,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:50,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:50,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150439964] [2024-06-04 16:09:50,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150439964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:50,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:50,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:50,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913052475] [2024-06-04 16:09:50,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:50,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:50,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:50,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:50,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 597 transitions, 8661 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:50,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:50,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:50,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:52,005 INFO L124 PetriNetUnfolderBase]: 3608/6188 cut-off events. [2024-06-04 16:09:52,005 INFO L125 PetriNetUnfolderBase]: For 355178/355178 co-relation queries the response was YES. [2024-06-04 16:09:52,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39229 conditions, 6188 events. 3608/6188 cut-off events. For 355178/355178 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 43782 event pairs, 685 based on Foata normal form. 1/6183 useless extension candidates. Maximal degree in co-relation 39037. Up to 4887 conditions per place. [2024-06-04 16:09:52,144 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 301 selfloop transitions, 325 changer transitions 0/633 dead transitions. [2024-06-04 16:09:52,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 633 transitions, 10217 flow [2024-06-04 16:09:52,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:09:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:09:52,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 295 transitions. [2024-06-04 16:09:52,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5402930402930403 [2024-06-04 16:09:52,145 INFO L175 Difference]: Start difference. First operand has 467 places, 597 transitions, 8661 flow. Second operand 13 states and 295 transitions. [2024-06-04 16:09:52,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 633 transitions, 10217 flow [2024-06-04 16:09:55,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 633 transitions, 9626 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-04 16:09:55,194 INFO L231 Difference]: Finished difference. Result has 472 places, 597 transitions, 8726 flow [2024-06-04 16:09:55,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8070, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8726, PETRI_PLACES=472, PETRI_TRANSITIONS=597} [2024-06-04 16:09:55,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 429 predicate places. [2024-06-04 16:09:55,194 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 597 transitions, 8726 flow [2024-06-04 16:09:55,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:55,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:09:55,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:09:55,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-04 16:09:55,195 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)] === [2024-06-04 16:09:55,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:09:55,195 INFO L85 PathProgramCache]: Analyzing trace with hash -754581303, now seen corresponding path program 11 times [2024-06-04 16:09:55,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:09:55,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268029230] [2024-06-04 16:09:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:09:55,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:09:55,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:09:55,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:09:55,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:09:55,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268029230] [2024-06-04 16:09:55,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268029230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:09:55,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:09:55,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:09:55,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672159415] [2024-06-04 16:09:55,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:09:55,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:09:55,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:09:55,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:09:55,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:09:55,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:09:55,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 597 transitions, 8726 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:09:55,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:09:55,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:09:55,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:09:56,856 INFO L124 PetriNetUnfolderBase]: 3621/6210 cut-off events. [2024-06-04 16:09:56,856 INFO L125 PetriNetUnfolderBase]: For 367367/367367 co-relation queries the response was YES. [2024-06-04 16:09:56,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39543 conditions, 6210 events. 3621/6210 cut-off events. For 367367/367367 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 44023 event pairs, 685 based on Foata normal form. 1/6205 useless extension candidates. Maximal degree in co-relation 39350. Up to 5331 conditions per place. [2024-06-04 16:09:56,953 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 495 selfloop transitions, 131 changer transitions 0/633 dead transitions. [2024-06-04 16:09:56,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 633 transitions, 10374 flow [2024-06-04 16:09:56,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:09:56,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:09:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-04 16:09:56,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547619047619048 [2024-06-04 16:09:56,954 INFO L175 Difference]: Start difference. First operand has 472 places, 597 transitions, 8726 flow. Second operand 10 states and 233 transitions. [2024-06-04 16:09:56,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 633 transitions, 10374 flow [2024-06-04 16:10:00,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 633 transitions, 9673 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-04 16:10:00,194 INFO L231 Difference]: Finished difference. Result has 470 places, 603 transitions, 8404 flow [2024-06-04 16:10:00,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8037, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8404, PETRI_PLACES=470, PETRI_TRANSITIONS=603} [2024-06-04 16:10:00,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-04 16:10:00,194 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 603 transitions, 8404 flow [2024-06-04 16:10:00,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:00,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:00,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:00,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-04 16:10:00,195 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)] === [2024-06-04 16:10:00,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:00,195 INFO L85 PathProgramCache]: Analyzing trace with hash -754575723, now seen corresponding path program 12 times [2024-06-04 16:10:00,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:00,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262978080] [2024-06-04 16:10:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:00,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:00,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:00,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:00,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262978080] [2024-06-04 16:10:00,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262978080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:00,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:00,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:00,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395290171] [2024-06-04 16:10:00,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:00,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:00,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:00,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:00,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:00,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:00,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 603 transitions, 8404 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:00,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:00,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:00,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:01,801 INFO L124 PetriNetUnfolderBase]: 3618/6206 cut-off events. [2024-06-04 16:10:01,801 INFO L125 PetriNetUnfolderBase]: For 365010/365010 co-relation queries the response was YES. [2024-06-04 16:10:01,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38911 conditions, 6206 events. 3618/6206 cut-off events. For 365010/365010 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 44000 event pairs, 685 based on Foata normal form. 1/6201 useless extension candidates. Maximal degree in co-relation 38717. Up to 5328 conditions per place. [2024-06-04 16:10:01,904 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 494 selfloop transitions, 133 changer transitions 0/634 dead transitions. [2024-06-04 16:10:01,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 634 transitions, 9734 flow [2024-06-04 16:10:01,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:10:01,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:10:01,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 266 transitions. [2024-06-04 16:10:01,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-04 16:10:01,905 INFO L175 Difference]: Start difference. First operand has 470 places, 603 transitions, 8404 flow. Second operand 12 states and 266 transitions. [2024-06-04 16:10:01,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 634 transitions, 9734 flow [2024-06-04 16:10:04,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 634 transitions, 9567 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-04 16:10:04,960 INFO L231 Difference]: Finished difference. Result has 476 places, 603 transitions, 8509 flow [2024-06-04 16:10:04,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8237, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8509, PETRI_PLACES=476, PETRI_TRANSITIONS=603} [2024-06-04 16:10:04,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 433 predicate places. [2024-06-04 16:10:04,961 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 603 transitions, 8509 flow [2024-06-04 16:10:04,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:04,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:04,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:04,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-04 16:10:04,961 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)] === [2024-06-04 16:10:04,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:04,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1000054067, now seen corresponding path program 13 times [2024-06-04 16:10:04,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:04,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382084818] [2024-06-04 16:10:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:04,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:05,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:05,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382084818] [2024-06-04 16:10:05,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382084818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:05,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:05,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:05,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018719947] [2024-06-04 16:10:05,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:05,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:05,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:05,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:05,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:05,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 603 transitions, 8509 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:05,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:05,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:05,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:06,743 INFO L124 PetriNetUnfolderBase]: 3631/6228 cut-off events. [2024-06-04 16:10:06,743 INFO L125 PetriNetUnfolderBase]: For 377322/377322 co-relation queries the response was YES. [2024-06-04 16:10:06,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39445 conditions, 6228 events. 3631/6228 cut-off events. For 377322/377322 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 44146 event pairs, 685 based on Foata normal form. 1/6223 useless extension candidates. Maximal degree in co-relation 39249. Up to 5237 conditions per place. [2024-06-04 16:10:06,838 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 424 selfloop transitions, 210 changer transitions 0/641 dead transitions. [2024-06-04 16:10:06,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 641 transitions, 10392 flow [2024-06-04 16:10:06,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:10:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:10:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 310 transitions. [2024-06-04 16:10:06,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272108843537415 [2024-06-04 16:10:06,840 INFO L175 Difference]: Start difference. First operand has 476 places, 603 transitions, 8509 flow. Second operand 14 states and 310 transitions. [2024-06-04 16:10:06,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 641 transitions, 10392 flow [2024-06-04 16:10:10,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 641 transitions, 10118 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-04 16:10:10,462 INFO L231 Difference]: Finished difference. Result has 479 places, 609 transitions, 8756 flow [2024-06-04 16:10:10,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8235, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=603, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8756, PETRI_PLACES=479, PETRI_TRANSITIONS=609} [2024-06-04 16:10:10,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-04 16:10:10,462 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 609 transitions, 8756 flow [2024-06-04 16:10:10,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:10,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:10,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:10,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-04 16:10:10,463 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)] === [2024-06-04 16:10:10,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:10,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1762495555, now seen corresponding path program 14 times [2024-06-04 16:10:10,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:10,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508488220] [2024-06-04 16:10:10,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:10,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:10,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:10,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508488220] [2024-06-04 16:10:10,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508488220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:10,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:10,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:10,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632575300] [2024-06-04 16:10:10,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:10,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:10,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:10,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:10,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:10,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:10,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 609 transitions, 8756 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:10,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:10,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:10,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:12,283 INFO L124 PetriNetUnfolderBase]: 3636/6237 cut-off events. [2024-06-04 16:10:12,283 INFO L125 PetriNetUnfolderBase]: For 383858/383858 co-relation queries the response was YES. [2024-06-04 16:10:12,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39732 conditions, 6237 events. 3636/6237 cut-off events. For 383858/383858 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 44253 event pairs, 685 based on Foata normal form. 1/6232 useless extension candidates. Maximal degree in co-relation 39535. Up to 5243 conditions per place. [2024-06-04 16:10:12,370 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 440 selfloop transitions, 194 changer transitions 0/641 dead transitions. [2024-06-04 16:10:12,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 641 transitions, 10591 flow [2024-06-04 16:10:12,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:10:12,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:10:12,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-04 16:10:12,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-04 16:10:12,371 INFO L175 Difference]: Start difference. First operand has 479 places, 609 transitions, 8756 flow. Second operand 11 states and 252 transitions. [2024-06-04 16:10:12,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 641 transitions, 10591 flow [2024-06-04 16:10:15,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 641 transitions, 10141 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-04 16:10:15,832 INFO L231 Difference]: Finished difference. Result has 479 places, 612 transitions, 8752 flow [2024-06-04 16:10:15,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8312, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8752, PETRI_PLACES=479, PETRI_TRANSITIONS=612} [2024-06-04 16:10:15,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-04 16:10:15,832 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 612 transitions, 8752 flow [2024-06-04 16:10:15,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:15,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:15,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:15,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-04 16:10:15,833 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)] === [2024-06-04 16:10:15,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:15,833 INFO L85 PathProgramCache]: Analyzing trace with hash 987882227, now seen corresponding path program 15 times [2024-06-04 16:10:15,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:15,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576608710] [2024-06-04 16:10:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:15,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:16,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:16,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576608710] [2024-06-04 16:10:16,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576608710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:16,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:16,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:16,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795343741] [2024-06-04 16:10:16,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:16,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:16,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:16,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:16,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:16,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:16,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 612 transitions, 8752 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:16,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:16,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:16,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:17,557 INFO L124 PetriNetUnfolderBase]: 3641/6246 cut-off events. [2024-06-04 16:10:17,557 INFO L125 PetriNetUnfolderBase]: For 389842/389842 co-relation queries the response was YES. [2024-06-04 16:10:17,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39804 conditions, 6246 events. 3641/6246 cut-off events. For 389842/389842 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 44361 event pairs, 685 based on Foata normal form. 1/6241 useless extension candidates. Maximal degree in co-relation 39606. Up to 5249 conditions per place. [2024-06-04 16:10:17,680 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 437 selfloop transitions, 203 changer transitions 0/647 dead transitions. [2024-06-04 16:10:17,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 647 transitions, 10618 flow [2024-06-04 16:10:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:10:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:10:17,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 307 transitions. [2024-06-04 16:10:17,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5221088435374149 [2024-06-04 16:10:17,681 INFO L175 Difference]: Start difference. First operand has 479 places, 612 transitions, 8752 flow. Second operand 14 states and 307 transitions. [2024-06-04 16:10:17,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 647 transitions, 10618 flow [2024-06-04 16:10:21,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 647 transitions, 10313 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-04 16:10:21,554 INFO L231 Difference]: Finished difference. Result has 486 places, 615 transitions, 8917 flow [2024-06-04 16:10:21,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8450, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=612, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8917, PETRI_PLACES=486, PETRI_TRANSITIONS=615} [2024-06-04 16:10:21,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-04 16:10:21,555 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 615 transitions, 8917 flow [2024-06-04 16:10:21,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:21,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:21,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:21,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-04 16:10:21,556 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)] === [2024-06-04 16:10:21,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash 994691687, now seen corresponding path program 16 times [2024-06-04 16:10:21,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:21,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570694737] [2024-06-04 16:10:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:21,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:21,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:21,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:21,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570694737] [2024-06-04 16:10:21,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570694737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:21,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:21,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:21,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429876843] [2024-06-04 16:10:21,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:21,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:21,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:21,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:21,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:21,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:21,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 615 transitions, 8917 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:21,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:21,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:21,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:23,356 INFO L124 PetriNetUnfolderBase]: 3638/6242 cut-off events. [2024-06-04 16:10:23,357 INFO L125 PetriNetUnfolderBase]: For 390075/390075 co-relation queries the response was YES. [2024-06-04 16:10:23,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39790 conditions, 6242 events. 3638/6242 cut-off events. For 390075/390075 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 44280 event pairs, 685 based on Foata normal form. 1/6237 useless extension candidates. Maximal degree in co-relation 39591. Up to 5246 conditions per place. [2024-06-04 16:10:23,463 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 433 selfloop transitions, 204 changer transitions 0/644 dead transitions. [2024-06-04 16:10:23,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 644 transitions, 10717 flow [2024-06-04 16:10:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:10:23,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:10:23,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-04 16:10:23,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-04 16:10:23,464 INFO L175 Difference]: Start difference. First operand has 486 places, 615 transitions, 8917 flow. Second operand 11 states and 253 transitions. [2024-06-04 16:10:23,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 644 transitions, 10717 flow [2024-06-04 16:10:26,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 644 transitions, 10235 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-04 16:10:26,561 INFO L231 Difference]: Finished difference. Result has 486 places, 615 transitions, 8849 flow [2024-06-04 16:10:26,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8435, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8849, PETRI_PLACES=486, PETRI_TRANSITIONS=615} [2024-06-04 16:10:26,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 443 predicate places. [2024-06-04 16:10:26,562 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 615 transitions, 8849 flow [2024-06-04 16:10:26,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:26,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:26,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:26,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-04 16:10:26,562 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)] === [2024-06-04 16:10:26,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:26,563 INFO L85 PathProgramCache]: Analyzing trace with hash 177149777, now seen corresponding path program 17 times [2024-06-04 16:10:26,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:26,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447093545] [2024-06-04 16:10:26,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:26,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:26,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:26,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:26,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447093545] [2024-06-04 16:10:26,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447093545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:26,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:26,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:26,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007373295] [2024-06-04 16:10:26,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:26,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:26,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:26,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:26,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:26,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:26,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 615 transitions, 8849 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:26,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:26,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:26,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:28,165 INFO L124 PetriNetUnfolderBase]: 3635/6238 cut-off events. [2024-06-04 16:10:28,165 INFO L125 PetriNetUnfolderBase]: For 389358/389358 co-relation queries the response was YES. [2024-06-04 16:10:28,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39442 conditions, 6238 events. 3635/6238 cut-off events. For 389358/389358 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 44295 event pairs, 685 based on Foata normal form. 1/6233 useless extension candidates. Maximal degree in co-relation 39243. Up to 5243 conditions per place. [2024-06-04 16:10:28,261 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 442 selfloop transitions, 196 changer transitions 0/645 dead transitions. [2024-06-04 16:10:28,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 645 transitions, 10427 flow [2024-06-04 16:10:28,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:10:28,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:10:28,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 289 transitions. [2024-06-04 16:10:28,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5293040293040293 [2024-06-04 16:10:28,263 INFO L175 Difference]: Start difference. First operand has 486 places, 615 transitions, 8849 flow. Second operand 13 states and 289 transitions. [2024-06-04 16:10:28,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 645 transitions, 10427 flow [2024-06-04 16:10:31,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 645 transitions, 9954 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-04 16:10:31,631 INFO L231 Difference]: Finished difference. Result has 488 places, 615 transitions, 8776 flow [2024-06-04 16:10:31,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8376, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8776, PETRI_PLACES=488, PETRI_TRANSITIONS=615} [2024-06-04 16:10:31,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-04 16:10:31,631 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 615 transitions, 8776 flow [2024-06-04 16:10:31,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:31,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:31,632 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] [2024-06-04 16:10:31,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-04 16:10:31,632 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)] === [2024-06-04 16:10:31,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:31,632 INFO L85 PathProgramCache]: Analyzing trace with hash -467342433, now seen corresponding path program 18 times [2024-06-04 16:10:31,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:31,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907030443] [2024-06-04 16:10:31,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:31,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:31,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:31,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907030443] [2024-06-04 16:10:31,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907030443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:31,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:31,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:31,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954710581] [2024-06-04 16:10:31,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:31,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:31,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:31,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:31,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:31,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:31,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 615 transitions, 8776 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:31,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:31,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:31,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:33,303 INFO L124 PetriNetUnfolderBase]: 3632/6234 cut-off events. [2024-06-04 16:10:33,304 INFO L125 PetriNetUnfolderBase]: For 388172/388172 co-relation queries the response was YES. [2024-06-04 16:10:33,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39296 conditions, 6234 events. 3632/6234 cut-off events. For 388172/388172 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 44257 event pairs, 685 based on Foata normal form. 1/6229 useless extension candidates. Maximal degree in co-relation 39096. Up to 5240 conditions per place. [2024-06-04 16:10:33,404 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 422 selfloop transitions, 217 changer transitions 0/646 dead transitions. [2024-06-04 16:10:33,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 646 transitions, 10128 flow [2024-06-04 16:10:33,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-04 16:10:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-04 16:10:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 324 transitions. [2024-06-04 16:10:33,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-04 16:10:33,406 INFO L175 Difference]: Start difference. First operand has 488 places, 615 transitions, 8776 flow. Second operand 15 states and 324 transitions. [2024-06-04 16:10:33,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 646 transitions, 10128 flow [2024-06-04 16:10:36,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 646 transitions, 9674 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-04 16:10:36,592 INFO L231 Difference]: Finished difference. Result has 491 places, 615 transitions, 8762 flow [2024-06-04 16:10:36,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8322, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=8762, PETRI_PLACES=491, PETRI_TRANSITIONS=615} [2024-06-04 16:10:36,592 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-04 16:10:36,592 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 615 transitions, 8762 flow [2024-06-04 16:10:36,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:36,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:36,592 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] [2024-06-04 16:10:36,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-04 16:10:36,593 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)] === [2024-06-04 16:10:36,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:36,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1907726299, now seen corresponding path program 19 times [2024-06-04 16:10:36,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:36,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367806519] [2024-06-04 16:10:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:36,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:36,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:36,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367806519] [2024-06-04 16:10:36,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367806519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:36,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:36,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:36,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600505104] [2024-06-04 16:10:36,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:36,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:36,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:36,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:36,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:36,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:36,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 615 transitions, 8762 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:36,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:36,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:36,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:38,382 INFO L124 PetriNetUnfolderBase]: 3645/6257 cut-off events. [2024-06-04 16:10:38,383 INFO L125 PetriNetUnfolderBase]: For 401267/401270 co-relation queries the response was YES. [2024-06-04 16:10:38,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39562 conditions, 6257 events. 3645/6257 cut-off events. For 401267/401270 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 44465 event pairs, 706 based on Foata normal form. 3/6252 useless extension candidates. Maximal degree in co-relation 39361. Up to 5022 conditions per place. [2024-06-04 16:10:38,478 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 316 selfloop transitions, 325 changer transitions 0/648 dead transitions. [2024-06-04 16:10:38,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 648 transitions, 10665 flow [2024-06-04 16:10:38,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:10:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:10:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 269 transitions. [2024-06-04 16:10:38,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5337301587301587 [2024-06-04 16:10:38,479 INFO L175 Difference]: Start difference. First operand has 491 places, 615 transitions, 8762 flow. Second operand 12 states and 269 transitions. [2024-06-04 16:10:38,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 648 transitions, 10665 flow [2024-06-04 16:10:42,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 648 transitions, 10150 flow, removed 0 selfloop flow, removed 16 redundant places. [2024-06-04 16:10:42,135 INFO L231 Difference]: Finished difference. Result has 487 places, 621 transitions, 8992 flow [2024-06-04 16:10:42,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8247, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8992, PETRI_PLACES=487, PETRI_TRANSITIONS=621} [2024-06-04 16:10:42,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 444 predicate places. [2024-06-04 16:10:42,136 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 621 transitions, 8992 flow [2024-06-04 16:10:42,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:42,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:42,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:42,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-04 16:10:42,136 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)] === [2024-06-04 16:10:42,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:42,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1907731879, now seen corresponding path program 20 times [2024-06-04 16:10:42,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:42,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056275462] [2024-06-04 16:10:42,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:42,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:42,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:42,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056275462] [2024-06-04 16:10:42,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056275462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:42,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:42,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:42,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98580598] [2024-06-04 16:10:42,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:42,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:42,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:42,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:42,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:42,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:42,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 621 transitions, 8992 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:42,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:42,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:42,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:43,856 INFO L124 PetriNetUnfolderBase]: 3642/6253 cut-off events. [2024-06-04 16:10:43,856 INFO L125 PetriNetUnfolderBase]: For 401232/401235 co-relation queries the response was YES. [2024-06-04 16:10:43,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39734 conditions, 6253 events. 3642/6253 cut-off events. For 401232/401235 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 44433 event pairs, 706 based on Foata normal form. 3/6248 useless extension candidates. Maximal degree in co-relation 39532. Up to 5019 conditions per place. [2024-06-04 16:10:43,956 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 317 selfloop transitions, 325 changer transitions 0/649 dead transitions. [2024-06-04 16:10:43,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 649 transitions, 10578 flow [2024-06-04 16:10:43,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-04 16:10:43,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-04 16:10:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 304 transitions. [2024-06-04 16:10:43,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-04 16:10:43,957 INFO L175 Difference]: Start difference. First operand has 487 places, 621 transitions, 8992 flow. Second operand 14 states and 304 transitions. [2024-06-04 16:10:43,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 649 transitions, 10578 flow [2024-06-04 16:10:47,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 649 transitions, 9890 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-04 16:10:47,838 INFO L231 Difference]: Finished difference. Result has 492 places, 621 transitions, 8960 flow [2024-06-04 16:10:47,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8304, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8960, PETRI_PLACES=492, PETRI_TRANSITIONS=621} [2024-06-04 16:10:47,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 449 predicate places. [2024-06-04 16:10:47,838 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 621 transitions, 8960 flow [2024-06-04 16:10:47,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:47,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:47,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:47,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-04 16:10:47,839 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)] === [2024-06-04 16:10:47,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:47,839 INFO L85 PathProgramCache]: Analyzing trace with hash 2035922207, now seen corresponding path program 21 times [2024-06-04 16:10:47,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:47,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567906214] [2024-06-04 16:10:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:47,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:48,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:48,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:48,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567906214] [2024-06-04 16:10:48,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567906214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:48,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:48,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:48,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982369994] [2024-06-04 16:10:48,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:48,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:48,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:48,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:48,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:48,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:48,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 621 transitions, 8960 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:48,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:48,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:48,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:49,536 INFO L124 PetriNetUnfolderBase]: 3655/6274 cut-off events. [2024-06-04 16:10:49,536 INFO L125 PetriNetUnfolderBase]: For 413861/413861 co-relation queries the response was YES. [2024-06-04 16:10:49,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39984 conditions, 6274 events. 3655/6274 cut-off events. For 413861/413861 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 44618 event pairs, 685 based on Foata normal form. 1/6269 useless extension candidates. Maximal degree in co-relation 39781. Up to 5034 conditions per place. [2024-06-04 16:10:49,634 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 332 changer transitions 0/660 dead transitions. [2024-06-04 16:10:49,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 660 transitions, 10923 flow [2024-06-04 16:10:49,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:10:49,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:10:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 275 transitions. [2024-06-04 16:10:49,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5456349206349206 [2024-06-04 16:10:49,635 INFO L175 Difference]: Start difference. First operand has 492 places, 621 transitions, 8960 flow. Second operand 12 states and 275 transitions. [2024-06-04 16:10:49,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 660 transitions, 10923 flow [2024-06-04 16:10:53,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 660 transitions, 10252 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-04 16:10:53,909 INFO L231 Difference]: Finished difference. Result has 491 places, 627 transitions, 9064 flow [2024-06-04 16:10:53,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8301, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9064, PETRI_PLACES=491, PETRI_TRANSITIONS=627} [2024-06-04 16:10:53,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-04 16:10:53,910 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 627 transitions, 9064 flow [2024-06-04 16:10:53,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:53,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:10:53,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:10:53,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-04 16:10:53,911 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)] === [2024-06-04 16:10:53,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:10:53,911 INFO L85 PathProgramCache]: Analyzing trace with hash -394351427, now seen corresponding path program 22 times [2024-06-04 16:10:53,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:10:53,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647368346] [2024-06-04 16:10:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:10:53,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:10:53,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:10:54,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:10:54,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:10:54,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647368346] [2024-06-04 16:10:54,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647368346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:10:54,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:10:54,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:10:54,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432081962] [2024-06-04 16:10:54,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:10:54,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:10:54,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:10:54,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:10:54,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:10:54,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:10:54,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 627 transitions, 9064 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:10:54,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:10:54,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:10:54,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:10:55,646 INFO L124 PetriNetUnfolderBase]: 3668/6296 cut-off events. [2024-06-04 16:10:55,646 INFO L125 PetriNetUnfolderBase]: For 427480/427480 co-relation queries the response was YES. [2024-06-04 16:10:55,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40287 conditions, 6296 events. 3668/6296 cut-off events. For 427480/427480 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 44795 event pairs, 685 based on Foata normal form. 1/6291 useless extension candidates. Maximal degree in co-relation 40083. Up to 5049 conditions per place. [2024-06-04 16:10:55,748 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 320 selfloop transitions, 340 changer transitions 0/667 dead transitions. [2024-06-04 16:10:55,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 667 transitions, 11047 flow [2024-06-04 16:10:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-04 16:10:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-04 16:10:55,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 291 transitions. [2024-06-04 16:10:55,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532967032967033 [2024-06-04 16:10:55,749 INFO L175 Difference]: Start difference. First operand has 491 places, 627 transitions, 9064 flow. Second operand 13 states and 291 transitions. [2024-06-04 16:10:55,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 667 transitions, 11047 flow [2024-06-04 16:11:00,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 667 transitions, 10355 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-04 16:11:00,248 INFO L231 Difference]: Finished difference. Result has 494 places, 633 transitions, 9167 flow [2024-06-04 16:11:00,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8388, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9167, PETRI_PLACES=494, PETRI_TRANSITIONS=633} [2024-06-04 16:11:00,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-04 16:11:00,248 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 633 transitions, 9167 flow [2024-06-04 16:11:00,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:00,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:00,249 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, 1, 1] [2024-06-04 16:11:00,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-04 16:11:00,249 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)] === [2024-06-04 16:11:00,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:00,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1174908443, now seen corresponding path program 23 times [2024-06-04 16:11:00,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:00,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050977221] [2024-06-04 16:11:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:00,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:00,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:00,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050977221] [2024-06-04 16:11:00,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050977221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:00,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:00,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:00,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792539986] [2024-06-04 16:11:00,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:00,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:00,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:00,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:00,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:00,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:00,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 633 transitions, 9167 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:00,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:00,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:00,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:02,169 INFO L124 PetriNetUnfolderBase]: 3665/6292 cut-off events. [2024-06-04 16:11:02,169 INFO L125 PetriNetUnfolderBase]: For 420111/420111 co-relation queries the response was YES. [2024-06-04 16:11:02,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40149 conditions, 6292 events. 3665/6292 cut-off events. For 420111/420111 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 44715 event pairs, 685 based on Foata normal form. 1/6287 useless extension candidates. Maximal degree in co-relation 39945. Up to 5046 conditions per place. [2024-06-04 16:11:02,272 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 363 selfloop transitions, 304 changer transitions 0/674 dead transitions. [2024-06-04 16:11:02,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 674 transitions, 11083 flow [2024-06-04 16:11:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:11:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:11:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-04 16:11:02,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.577922077922078 [2024-06-04 16:11:02,274 INFO L175 Difference]: Start difference. First operand has 494 places, 633 transitions, 9167 flow. Second operand 11 states and 267 transitions. [2024-06-04 16:11:02,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 674 transitions, 11083 flow [2024-06-04 16:11:06,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 674 transitions, 10496 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-04 16:11:06,905 INFO L231 Difference]: Finished difference. Result has 495 places, 633 transitions, 9211 flow [2024-06-04 16:11:06,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8584, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9211, PETRI_PLACES=495, PETRI_TRANSITIONS=633} [2024-06-04 16:11:06,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 452 predicate places. [2024-06-04 16:11:06,906 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 633 transitions, 9211 flow [2024-06-04 16:11:06,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:06,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:06,906 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] [2024-06-04 16:11:06,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-04 16:11:06,906 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)] === [2024-06-04 16:11:06,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:06,907 INFO L85 PathProgramCache]: Analyzing trace with hash 2030559827, now seen corresponding path program 24 times [2024-06-04 16:11:06,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:06,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213377716] [2024-06-04 16:11:06,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:06,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:06,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:07,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:07,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:07,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213377716] [2024-06-04 16:11:07,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213377716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:07,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:07,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:07,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110123115] [2024-06-04 16:11:07,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:07,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:07,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:07,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:07,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 633 transitions, 9211 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:07,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:07,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:07,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:08,579 INFO L124 PetriNetUnfolderBase]: 3662/6288 cut-off events. [2024-06-04 16:11:08,579 INFO L125 PetriNetUnfolderBase]: For 413543/413543 co-relation queries the response was YES. [2024-06-04 16:11:08,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40046 conditions, 6288 events. 3662/6288 cut-off events. For 413543/413543 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 44720 event pairs, 685 based on Foata normal form. 1/6283 useless extension candidates. Maximal degree in co-relation 39842. Up to 5043 conditions per place. [2024-06-04 16:11:08,685 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 342 selfloop transitions, 314 changer transitions 0/663 dead transitions. [2024-06-04 16:11:08,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 663 transitions, 11077 flow [2024-06-04 16:11:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:11:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:11:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-04 16:11:08,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5767195767195767 [2024-06-04 16:11:08,686 INFO L175 Difference]: Start difference. First operand has 495 places, 633 transitions, 9211 flow. Second operand 9 states and 218 transitions. [2024-06-04 16:11:08,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 663 transitions, 11077 flow [2024-06-04 16:11:12,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 663 transitions, 10422 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-06-04 16:11:12,707 INFO L231 Difference]: Finished difference. Result has 493 places, 633 transitions, 9202 flow [2024-06-04 16:11:12,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8564, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=314, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9202, PETRI_PLACES=493, PETRI_TRANSITIONS=633} [2024-06-04 16:11:12,707 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-04 16:11:12,708 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 633 transitions, 9202 flow [2024-06-04 16:11:12,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:12,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:12,708 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] [2024-06-04 16:11:12,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-04 16:11:12,708 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)] === [2024-06-04 16:11:12,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:12,708 INFO L85 PathProgramCache]: Analyzing trace with hash 247294381, now seen corresponding path program 25 times [2024-06-04 16:11:12,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:12,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595734013] [2024-06-04 16:11:12,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:12,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:12,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:12,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:12,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595734013] [2024-06-04 16:11:12,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595734013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:12,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:12,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:12,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421727686] [2024-06-04 16:11:12,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:12,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:12,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:12,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:12,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:13,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:13,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 633 transitions, 9202 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:13,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:13,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:13,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:14,432 INFO L124 PetriNetUnfolderBase]: 3659/6284 cut-off events. [2024-06-04 16:11:14,432 INFO L125 PetriNetUnfolderBase]: For 400023/400023 co-relation queries the response was YES. [2024-06-04 16:11:14,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39839 conditions, 6284 events. 3659/6284 cut-off events. For 400023/400023 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 44645 event pairs, 685 based on Foata normal form. 1/6279 useless extension candidates. Maximal degree in co-relation 39636. Up to 5040 conditions per place. [2024-06-04 16:11:14,530 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 344 selfloop transitions, 320 changer transitions 0/671 dead transitions. [2024-06-04 16:11:14,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 671 transitions, 10862 flow [2024-06-04 16:11:14,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:11:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:11:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 279 transitions. [2024-06-04 16:11:14,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-04 16:11:14,531 INFO L175 Difference]: Start difference. First operand has 493 places, 633 transitions, 9202 flow. Second operand 12 states and 279 transitions. [2024-06-04 16:11:14,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 671 transitions, 10862 flow [2024-06-04 16:11:18,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 671 transitions, 10204 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-04 16:11:18,287 INFO L231 Difference]: Finished difference. Result has 496 places, 633 transitions, 9200 flow [2024-06-04 16:11:18,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8546, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9200, PETRI_PLACES=496, PETRI_TRANSITIONS=633} [2024-06-04 16:11:18,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-04 16:11:18,288 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 633 transitions, 9200 flow [2024-06-04 16:11:18,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:18,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:18,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:18,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-04 16:11:18,288 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)] === [2024-06-04 16:11:18,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:18,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2030173877, now seen corresponding path program 26 times [2024-06-04 16:11:18,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:18,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063617165] [2024-06-04 16:11:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:18,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:18,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:18,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:18,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063617165] [2024-06-04 16:11:18,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063617165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:18,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:18,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:11:18,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782804071] [2024-06-04 16:11:18,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:18,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:11:18,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:18,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:11:18,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:11:18,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:18,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 633 transitions, 9200 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:18,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:18,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:18,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:20,078 INFO L124 PetriNetUnfolderBase]: 3656/6280 cut-off events. [2024-06-04 16:11:20,079 INFO L125 PetriNetUnfolderBase]: For 392660/392660 co-relation queries the response was YES. [2024-06-04 16:11:20,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39727 conditions, 6280 events. 3656/6280 cut-off events. For 392660/392660 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 44684 event pairs, 685 based on Foata normal form. 1/6275 useless extension candidates. Maximal degree in co-relation 39524. Up to 5037 conditions per place. [2024-06-04 16:11:20,171 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 353 selfloop transitions, 304 changer transitions 0/664 dead transitions. [2024-06-04 16:11:20,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 664 transitions, 10592 flow [2024-06-04 16:11:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:11:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:11:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-04 16:11:20,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:11:20,172 INFO L175 Difference]: Start difference. First operand has 496 places, 633 transitions, 9200 flow. Second operand 9 states and 219 transitions. [2024-06-04 16:11:20,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 664 transitions, 10592 flow [2024-06-04 16:11:23,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 664 transitions, 9389 flow, removed 7 selfloop flow, removed 17 redundant places. [2024-06-04 16:11:23,608 INFO L231 Difference]: Finished difference. Result has 488 places, 633 transitions, 8621 flow [2024-06-04 16:11:23,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7997, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8621, PETRI_PLACES=488, PETRI_TRANSITIONS=633} [2024-06-04 16:11:23,608 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-04 16:11:23,608 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 633 transitions, 8621 flow [2024-06-04 16:11:23,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:23,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:23,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:23,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-04 16:11:23,609 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)] === [2024-06-04 16:11:23,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:23,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1637461771, now seen corresponding path program 1 times [2024-06-04 16:11:23,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:23,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185411360] [2024-06-04 16:11:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:23,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:23,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:23,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:23,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185411360] [2024-06-04 16:11:23,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185411360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:23,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:23,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:23,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808033799] [2024-06-04 16:11:23,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:23,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:23,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:23,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:23,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:23,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:23,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 633 transitions, 8621 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:23,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:23,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:23,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:25,308 INFO L124 PetriNetUnfolderBase]: 3676/6316 cut-off events. [2024-06-04 16:11:25,308 INFO L125 PetriNetUnfolderBase]: For 419890/419890 co-relation queries the response was YES. [2024-06-04 16:11:25,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39575 conditions, 6316 events. 3676/6316 cut-off events. For 419890/419890 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 44918 event pairs, 685 based on Foata normal form. 6/6316 useless extension candidates. Maximal degree in co-relation 39373. Up to 5433 conditions per place. [2024-06-04 16:11:25,408 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 572 selfloop transitions, 79 changer transitions 0/658 dead transitions. [2024-06-04 16:11:25,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 658 transitions, 10063 flow [2024-06-04 16:11:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:11:25,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:11:25,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-04 16:11:25,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2024-06-04 16:11:25,409 INFO L175 Difference]: Start difference. First operand has 488 places, 633 transitions, 8621 flow. Second operand 10 states and 223 transitions. [2024-06-04 16:11:25,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 658 transitions, 10063 flow [2024-06-04 16:11:29,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 658 transitions, 9362 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-04 16:11:29,069 INFO L231 Difference]: Finished difference. Result has 488 places, 634 transitions, 8120 flow [2024-06-04 16:11:29,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7920, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8120, PETRI_PLACES=488, PETRI_TRANSITIONS=634} [2024-06-04 16:11:29,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 445 predicate places. [2024-06-04 16:11:29,070 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 634 transitions, 8120 flow [2024-06-04 16:11:29,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:29,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:29,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:29,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-04 16:11:29,070 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)] === [2024-06-04 16:11:29,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:29,070 INFO L85 PathProgramCache]: Analyzing trace with hash 496421973, now seen corresponding path program 2 times [2024-06-04 16:11:29,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:29,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066927474] [2024-06-04 16:11:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:29,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:29,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:29,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:29,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066927474] [2024-06-04 16:11:29,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066927474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:29,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:29,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:29,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598389569] [2024-06-04 16:11:29,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:29,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:29,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:29,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:29,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:29,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:29,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 634 transitions, 8120 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:29,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:29,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:29,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:30,804 INFO L124 PetriNetUnfolderBase]: 3729/6413 cut-off events. [2024-06-04 16:11:30,805 INFO L125 PetriNetUnfolderBase]: For 463029/463029 co-relation queries the response was YES. [2024-06-04 16:11:30,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40490 conditions, 6413 events. 3729/6413 cut-off events. For 463029/463029 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 45770 event pairs, 671 based on Foata normal form. 6/6413 useless extension candidates. Maximal degree in co-relation 40288. Up to 5089 conditions per place. [2024-06-04 16:11:30,908 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 570 selfloop transitions, 87 changer transitions 0/664 dead transitions. [2024-06-04 16:11:30,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 664 transitions, 9890 flow [2024-06-04 16:11:30,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:11:30,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:11:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-04 16:11:30,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529100529100529 [2024-06-04 16:11:30,937 INFO L175 Difference]: Start difference. First operand has 488 places, 634 transitions, 8120 flow. Second operand 9 states and 209 transitions. [2024-06-04 16:11:30,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 664 transitions, 9890 flow [2024-06-04 16:11:33,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 664 transitions, 9704 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-04 16:11:33,742 INFO L231 Difference]: Finished difference. Result has 489 places, 636 transitions, 8190 flow [2024-06-04 16:11:33,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7934, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8190, PETRI_PLACES=489, PETRI_TRANSITIONS=636} [2024-06-04 16:11:33,743 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-04 16:11:33,743 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 636 transitions, 8190 flow [2024-06-04 16:11:33,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:33,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:33,743 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] [2024-06-04 16:11:33,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-04 16:11:33,743 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)] === [2024-06-04 16:11:33,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:33,744 INFO L85 PathProgramCache]: Analyzing trace with hash 496688883, now seen corresponding path program 3 times [2024-06-04 16:11:33,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:33,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134348787] [2024-06-04 16:11:33,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:33,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:33,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:33,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:33,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134348787] [2024-06-04 16:11:33,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134348787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:33,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:33,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:33,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535008344] [2024-06-04 16:11:33,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:33,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:33,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:33,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:33,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:33,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:33,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 636 transitions, 8190 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:33,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:33,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:33,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:35,359 INFO L124 PetriNetUnfolderBase]: 3716/6384 cut-off events. [2024-06-04 16:11:35,360 INFO L125 PetriNetUnfolderBase]: For 427385/427385 co-relation queries the response was YES. [2024-06-04 16:11:35,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39671 conditions, 6384 events. 3716/6384 cut-off events. For 427385/427385 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 45459 event pairs, 673 based on Foata normal form. 6/6384 useless extension candidates. Maximal degree in co-relation 39468. Up to 5083 conditions per place. [2024-06-04 16:11:35,469 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 572 selfloop transitions, 83 changer transitions 0/662 dead transitions. [2024-06-04 16:11:35,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 662 transitions, 9626 flow [2024-06-04 16:11:35,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:11:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:11:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-04 16:11:35,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.544973544973545 [2024-06-04 16:11:35,470 INFO L175 Difference]: Start difference. First operand has 489 places, 636 transitions, 8190 flow. Second operand 9 states and 206 transitions. [2024-06-04 16:11:35,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 662 transitions, 9626 flow [2024-06-04 16:11:38,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 662 transitions, 9461 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-04 16:11:38,168 INFO L231 Difference]: Finished difference. Result has 493 places, 636 transitions, 8195 flow [2024-06-04 16:11:38,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8025, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8195, PETRI_PLACES=493, PETRI_TRANSITIONS=636} [2024-06-04 16:11:38,169 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-04 16:11:38,169 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 636 transitions, 8195 flow [2024-06-04 16:11:38,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:38,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:38,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:38,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-04 16:11:38,170 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)] === [2024-06-04 16:11:38,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:38,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1740418413, now seen corresponding path program 4 times [2024-06-04 16:11:38,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:38,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040182917] [2024-06-04 16:11:38,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:38,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:38,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:38,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:38,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040182917] [2024-06-04 16:11:38,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040182917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:38,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:38,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:38,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198708129] [2024-06-04 16:11:38,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:38,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:38,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:38,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:38,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:38,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:38,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 636 transitions, 8195 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:38,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:38,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:38,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:39,810 INFO L124 PetriNetUnfolderBase]: 3736/6422 cut-off events. [2024-06-04 16:11:39,810 INFO L125 PetriNetUnfolderBase]: For 432941/432941 co-relation queries the response was YES. [2024-06-04 16:11:39,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40046 conditions, 6422 events. 3736/6422 cut-off events. For 432941/432941 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 45860 event pairs, 691 based on Foata normal form. 6/6422 useless extension candidates. Maximal degree in co-relation 39841. Up to 5293 conditions per place. [2024-06-04 16:11:39,913 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 530 selfloop transitions, 135 changer transitions 0/672 dead transitions. [2024-06-04 16:11:39,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 672 transitions, 9699 flow [2024-06-04 16:11:39,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:11:39,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:11:39,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-04 16:11:39,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:11:39,914 INFO L175 Difference]: Start difference. First operand has 493 places, 636 transitions, 8195 flow. Second operand 9 states and 219 transitions. [2024-06-04 16:11:39,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 672 transitions, 9699 flow [2024-06-04 16:11:43,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 672 transitions, 9516 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-04 16:11:43,921 INFO L231 Difference]: Finished difference. Result has 494 places, 637 transitions, 8330 flow [2024-06-04 16:11:43,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8012, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=501, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8330, PETRI_PLACES=494, PETRI_TRANSITIONS=637} [2024-06-04 16:11:43,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-04 16:11:43,922 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 637 transitions, 8330 flow [2024-06-04 16:11:43,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:43,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:43,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:43,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-04 16:11:43,922 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)] === [2024-06-04 16:11:43,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:43,923 INFO L85 PathProgramCache]: Analyzing trace with hash 839328409, now seen corresponding path program 5 times [2024-06-04 16:11:43,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:43,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193568238] [2024-06-04 16:11:43,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:43,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:43,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:44,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:44,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193568238] [2024-06-04 16:11:44,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193568238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:44,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:44,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:44,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104983433] [2024-06-04 16:11:44,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:44,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:44,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:44,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:44,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:44,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:44,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 637 transitions, 8330 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:44,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:44,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:44,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:45,649 INFO L124 PetriNetUnfolderBase]: 3756/6462 cut-off events. [2024-06-04 16:11:45,650 INFO L125 PetriNetUnfolderBase]: For 442111/442114 co-relation queries the response was YES. [2024-06-04 16:11:45,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40510 conditions, 6462 events. 3756/6462 cut-off events. For 442111/442114 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 46249 event pairs, 708 based on Foata normal form. 8/6459 useless extension candidates. Maximal degree in co-relation 40304. Up to 5481 conditions per place. [2024-06-04 16:11:45,753 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 539 selfloop transitions, 134 changer transitions 0/680 dead transitions. [2024-06-04 16:11:45,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 680 transitions, 9870 flow [2024-06-04 16:11:45,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:11:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:11:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-04 16:11:45,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-04 16:11:45,754 INFO L175 Difference]: Start difference. First operand has 494 places, 637 transitions, 8330 flow. Second operand 10 states and 246 transitions. [2024-06-04 16:11:45,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 680 transitions, 9870 flow [2024-06-04 16:11:48,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 680 transitions, 9568 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-04 16:11:48,838 INFO L231 Difference]: Finished difference. Result has 497 places, 638 transitions, 8344 flow [2024-06-04 16:11:48,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8030, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8344, PETRI_PLACES=497, PETRI_TRANSITIONS=638} [2024-06-04 16:11:48,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-04 16:11:48,838 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 638 transitions, 8344 flow [2024-06-04 16:11:48,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:48,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:48,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:48,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-04 16:11:48,839 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)] === [2024-06-04 16:11:48,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:48,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1475577189, now seen corresponding path program 6 times [2024-06-04 16:11:48,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:48,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823383622] [2024-06-04 16:11:48,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:48,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:49,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:49,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823383622] [2024-06-04 16:11:49,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823383622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:49,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:49,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:49,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173797586] [2024-06-04 16:11:49,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:49,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:49,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:49,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:49,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:49,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:49,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 638 transitions, 8344 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:49,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:49,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:49,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:50,555 INFO L124 PetriNetUnfolderBase]: 3776/6494 cut-off events. [2024-06-04 16:11:50,556 INFO L125 PetriNetUnfolderBase]: For 441662/441665 co-relation queries the response was YES. [2024-06-04 16:11:50,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40598 conditions, 6494 events. 3776/6494 cut-off events. For 441662/441665 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 46383 event pairs, 704 based on Foata normal form. 8/6491 useless extension candidates. Maximal degree in co-relation 40391. Up to 5221 conditions per place. [2024-06-04 16:11:50,651 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 515 selfloop transitions, 153 changer transitions 0/675 dead transitions. [2024-06-04 16:11:50,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 675 transitions, 9858 flow [2024-06-04 16:11:50,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:11:50,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:11:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-04 16:11:50,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-04 16:11:50,653 INFO L175 Difference]: Start difference. First operand has 497 places, 638 transitions, 8344 flow. Second operand 9 states and 219 transitions. [2024-06-04 16:11:50,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 675 transitions, 9858 flow [2024-06-04 16:11:53,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 675 transitions, 9570 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-04 16:11:53,641 INFO L231 Difference]: Finished difference. Result has 498 places, 639 transitions, 8410 flow [2024-06-04 16:11:53,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8056, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8410, PETRI_PLACES=498, PETRI_TRANSITIONS=639} [2024-06-04 16:11:53,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 455 predicate places. [2024-06-04 16:11:53,642 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 639 transitions, 8410 flow [2024-06-04 16:11:53,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:53,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:53,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:11:53,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-04 16:11:53,642 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)] === [2024-06-04 16:11:53,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:53,643 INFO L85 PathProgramCache]: Analyzing trace with hash -675180505, now seen corresponding path program 7 times [2024-06-04 16:11:53,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:53,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222765999] [2024-06-04 16:11:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:53,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:53,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:53,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222765999] [2024-06-04 16:11:53,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222765999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:53,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:53,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:53,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613203045] [2024-06-04 16:11:53,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:53,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:53,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:53,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:53,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:53,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:53,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 639 transitions, 8410 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:53,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:53,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:53,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:11:55,482 INFO L124 PetriNetUnfolderBase]: 3829/6600 cut-off events. [2024-06-04 16:11:55,482 INFO L125 PetriNetUnfolderBase]: For 496919/496919 co-relation queries the response was YES. [2024-06-04 16:11:55,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42287 conditions, 6600 events. 3829/6600 cut-off events. For 496919/496919 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 47334 event pairs, 569 based on Foata normal form. 6/6600 useless extension candidates. Maximal degree in co-relation 42080. Up to 4328 conditions per place. [2024-06-04 16:11:55,575 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 518 selfloop transitions, 148 changer transitions 0/673 dead transitions. [2024-06-04 16:11:55,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 673 transitions, 10216 flow [2024-06-04 16:11:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:11:55,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:11:55,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:11:55,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-04 16:11:55,577 INFO L175 Difference]: Start difference. First operand has 498 places, 639 transitions, 8410 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:11:55,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 673 transitions, 10216 flow [2024-06-04 16:11:59,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 673 transitions, 9919 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-04 16:11:59,115 INFO L231 Difference]: Finished difference. Result has 500 places, 641 transitions, 8506 flow [2024-06-04 16:11:59,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8113, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8506, PETRI_PLACES=500, PETRI_TRANSITIONS=641} [2024-06-04 16:11:59,115 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 457 predicate places. [2024-06-04 16:11:59,116 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 641 transitions, 8506 flow [2024-06-04 16:11:59,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:59,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:11:59,116 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, 1, 1] [2024-06-04 16:11:59,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-04 16:11:59,116 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)] === [2024-06-04 16:11:59,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:11:59,117 INFO L85 PathProgramCache]: Analyzing trace with hash 674486665, now seen corresponding path program 8 times [2024-06-04 16:11:59,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:11:59,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888737765] [2024-06-04 16:11:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:11:59,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:11:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:11:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:11:59,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:11:59,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888737765] [2024-06-04 16:11:59,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888737765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:11:59,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:11:59,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:11:59,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642084845] [2024-06-04 16:11:59,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:11:59,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:11:59,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:11:59,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:11:59,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:11:59,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:11:59,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 641 transitions, 8506 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:11:59,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:11:59,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:11:59,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:01,036 INFO L124 PetriNetUnfolderBase]: 3816/6594 cut-off events. [2024-06-04 16:12:01,036 INFO L125 PetriNetUnfolderBase]: For 460443/460443 co-relation queries the response was YES. [2024-06-04 16:12:01,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41542 conditions, 6594 events. 3816/6594 cut-off events. For 460443/460443 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 47510 event pairs, 574 based on Foata normal form. 6/6594 useless extension candidates. Maximal degree in co-relation 41334. Up to 4322 conditions per place. [2024-06-04 16:12:01,132 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 512 selfloop transitions, 157 changer transitions 0/676 dead transitions. [2024-06-04 16:12:01,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 676 transitions, 10008 flow [2024-06-04 16:12:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:12:01,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:12:01,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 16:12:01,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:12:01,133 INFO L175 Difference]: Start difference. First operand has 500 places, 641 transitions, 8506 flow. Second operand 8 states and 200 transitions. [2024-06-04 16:12:01,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 676 transitions, 10008 flow [2024-06-04 16:12:04,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 676 transitions, 9748 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-04 16:12:04,062 INFO L231 Difference]: Finished difference. Result has 503 places, 641 transitions, 8566 flow [2024-06-04 16:12:04,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8246, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8566, PETRI_PLACES=503, PETRI_TRANSITIONS=641} [2024-06-04 16:12:04,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-04 16:12:04,063 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 641 transitions, 8566 flow [2024-06-04 16:12:04,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:04,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:04,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:04,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-04 16:12:04,064 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)] === [2024-06-04 16:12:04,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:04,064 INFO L85 PathProgramCache]: Analyzing trace with hash -25812327, now seen corresponding path program 9 times [2024-06-04 16:12:04,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:04,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037352092] [2024-06-04 16:12:04,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:04,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:04,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:04,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:04,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037352092] [2024-06-04 16:12:04,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037352092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:04,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:04,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:12:04,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460732981] [2024-06-04 16:12:04,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:04,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:12:04,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:04,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:12:04,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:12:04,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:04,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 641 transitions, 8566 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:04,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:04,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:04,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:05,851 INFO L124 PetriNetUnfolderBase]: 3869/6671 cut-off events. [2024-06-04 16:12:05,852 INFO L125 PetriNetUnfolderBase]: For 507016/507019 co-relation queries the response was YES. [2024-06-04 16:12:05,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43540 conditions, 6671 events. 3869/6671 cut-off events. For 507016/507019 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 48069 event pairs, 639 based on Foata normal form. 8/6671 useless extension candidates. Maximal degree in co-relation 43331. Up to 4161 conditions per place. [2024-06-04 16:12:05,973 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 520 selfloop transitions, 149 changer transitions 0/676 dead transitions. [2024-06-04 16:12:05,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 676 transitions, 10644 flow [2024-06-04 16:12:05,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:12:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:12:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:12:05,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-04 16:12:05,974 INFO L175 Difference]: Start difference. First operand has 503 places, 641 transitions, 8566 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:12:05,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 676 transitions, 10644 flow [2024-06-04 16:12:10,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 676 transitions, 10299 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-04 16:12:10,185 INFO L231 Difference]: Finished difference. Result has 503 places, 643 transitions, 8615 flow [2024-06-04 16:12:10,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8225, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8615, PETRI_PLACES=503, PETRI_TRANSITIONS=643} [2024-06-04 16:12:10,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 460 predicate places. [2024-06-04 16:12:10,185 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 643 transitions, 8615 flow [2024-06-04 16:12:10,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:10,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:10,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:10,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-04 16:12:10,186 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)] === [2024-06-04 16:12:10,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:10,186 INFO L85 PathProgramCache]: Analyzing trace with hash -25545417, now seen corresponding path program 10 times [2024-06-04 16:12:10,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:10,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281151081] [2024-06-04 16:12:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:10,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:10,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:10,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:10,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:10,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281151081] [2024-06-04 16:12:10,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281151081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:10,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:10,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:12:10,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431360363] [2024-06-04 16:12:10,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:10,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:12:10,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:10,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:12:10,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:12:10,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:10,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 643 transitions, 8615 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:10,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:10,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:10,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:11,987 INFO L124 PetriNetUnfolderBase]: 3856/6652 cut-off events. [2024-06-04 16:12:11,988 INFO L125 PetriNetUnfolderBase]: For 461385/461388 co-relation queries the response was YES. [2024-06-04 16:12:12,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42458 conditions, 6652 events. 3856/6652 cut-off events. For 461385/461388 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 47945 event pairs, 639 based on Foata normal form. 8/6652 useless extension candidates. Maximal degree in co-relation 42249. Up to 4155 conditions per place. [2024-06-04 16:12:12,097 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 515 selfloop transitions, 151 changer transitions 0/673 dead transitions. [2024-06-04 16:12:12,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 673 transitions, 10329 flow [2024-06-04 16:12:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:12:12,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:12:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:12:12,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:12:12,098 INFO L175 Difference]: Start difference. First operand has 503 places, 643 transitions, 8615 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:12:12,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 673 transitions, 10329 flow [2024-06-04 16:12:16,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 673 transitions, 9808 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-04 16:12:16,072 INFO L231 Difference]: Finished difference. Result has 505 places, 643 transitions, 8400 flow [2024-06-04 16:12:16,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8094, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8400, PETRI_PLACES=505, PETRI_TRANSITIONS=643} [2024-06-04 16:12:16,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 462 predicate places. [2024-06-04 16:12:16,073 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 643 transitions, 8400 flow [2024-06-04 16:12:16,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:16,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:16,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:16,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-04 16:12:16,073 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)] === [2024-06-04 16:12:16,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:16,074 INFO L85 PathProgramCache]: Analyzing trace with hash -232465767, now seen corresponding path program 11 times [2024-06-04 16:12:16,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:16,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528290547] [2024-06-04 16:12:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:16,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:16,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:16,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528290547] [2024-06-04 16:12:16,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528290547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:16,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:16,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:12:16,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009422751] [2024-06-04 16:12:16,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:16,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:12:16,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:12:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:12:16,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:16,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 643 transitions, 8400 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:16,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:16,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:16,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:17,931 INFO L124 PetriNetUnfolderBase]: 3843/6646 cut-off events. [2024-06-04 16:12:17,931 INFO L125 PetriNetUnfolderBase]: For 416841/416844 co-relation queries the response was YES. [2024-06-04 16:12:18,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40026 conditions, 6646 events. 3843/6646 cut-off events. For 416841/416844 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 47914 event pairs, 572 based on Foata normal form. 8/6646 useless extension candidates. Maximal degree in co-relation 39818. Up to 4149 conditions per place. [2024-06-04 16:12:18,030 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 503 selfloop transitions, 166 changer transitions 0/676 dead transitions. [2024-06-04 16:12:18,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 676 transitions, 9896 flow [2024-06-04 16:12:18,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:12:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:12:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-04 16:12:18,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-04 16:12:18,031 INFO L175 Difference]: Start difference. First operand has 505 places, 643 transitions, 8400 flow. Second operand 8 states and 197 transitions. [2024-06-04 16:12:18,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 676 transitions, 9896 flow [2024-06-04 16:12:22,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 676 transitions, 9570 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-04 16:12:22,520 INFO L231 Difference]: Finished difference. Result has 507 places, 643 transitions, 8410 flow [2024-06-04 16:12:22,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8074, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8410, PETRI_PLACES=507, PETRI_TRANSITIONS=643} [2024-06-04 16:12:22,520 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 464 predicate places. [2024-06-04 16:12:22,521 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 643 transitions, 8410 flow [2024-06-04 16:12:22,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:22,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:22,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:22,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-04 16:12:22,521 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:22,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:22,522 INFO L85 PathProgramCache]: Analyzing trace with hash -60916723, now seen corresponding path program 1 times [2024-06-04 16:12:22,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:22,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261432475] [2024-06-04 16:12:22,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:22,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:22,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:22,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261432475] [2024-06-04 16:12:22,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261432475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:22,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:22,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:12:22,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010871224] [2024-06-04 16:12:22,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:22,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:12:22,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:22,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:12:22,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:12:22,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:22,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 643 transitions, 8410 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:12:22,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:22,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:22,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:24,722 INFO L124 PetriNetUnfolderBase]: 4183/7182 cut-off events. [2024-06-04 16:12:24,722 INFO L125 PetriNetUnfolderBase]: For 930052/930052 co-relation queries the response was YES. [2024-06-04 16:12:24,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51327 conditions, 7182 events. 4183/7182 cut-off events. For 930052/930052 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 51722 event pairs, 749 based on Foata normal form. 6/7173 useless extension candidates. Maximal degree in co-relation 51118. Up to 5144 conditions per place. [2024-06-04 16:12:24,836 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 580 selfloop transitions, 111 changer transitions 0/698 dead transitions. [2024-06-04 16:12:24,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 698 transitions, 10664 flow [2024-06-04 16:12:24,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:12:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:12:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 236 transitions. [2024-06-04 16:12:24,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6243386243386243 [2024-06-04 16:12:24,837 INFO L175 Difference]: Start difference. First operand has 507 places, 643 transitions, 8410 flow. Second operand 9 states and 236 transitions. [2024-06-04 16:12:24,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 698 transitions, 10664 flow [2024-06-04 16:12:31,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 698 transitions, 10292 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-04 16:12:31,600 INFO L231 Difference]: Finished difference. Result has 508 places, 646 transitions, 8386 flow [2024-06-04 16:12:31,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8050, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8386, PETRI_PLACES=508, PETRI_TRANSITIONS=646} [2024-06-04 16:12:31,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-04 16:12:31,601 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 646 transitions, 8386 flow [2024-06-04 16:12:31,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:12:31,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:31,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:31,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-04 16:12:31,602 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:31,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:31,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1579021109, now seen corresponding path program 1 times [2024-06-04 16:12:31,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:31,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421652112] [2024-06-04 16:12:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:31,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:31,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:31,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:31,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421652112] [2024-06-04 16:12:31,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421652112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:31,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:31,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:31,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853614058] [2024-06-04 16:12:31,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:31,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:31,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:31,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:31,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:31,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:31,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 646 transitions, 8386 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:31,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:31,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:31,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:33,621 INFO L124 PetriNetUnfolderBase]: 4323/7423 cut-off events. [2024-06-04 16:12:33,622 INFO L125 PetriNetUnfolderBase]: For 1017699/1017699 co-relation queries the response was YES. [2024-06-04 16:12:33,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54064 conditions, 7423 events. 4323/7423 cut-off events. For 1017699/1017699 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 53808 event pairs, 670 based on Foata normal form. 6/7420 useless extension candidates. Maximal degree in co-relation 53854. Up to 5907 conditions per place. [2024-06-04 16:12:33,739 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 562 selfloop transitions, 118 changer transitions 0/687 dead transitions. [2024-06-04 16:12:33,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 687 transitions, 10515 flow [2024-06-04 16:12:33,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:12:33,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:12:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-04 16:12:33,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:12:33,740 INFO L175 Difference]: Start difference. First operand has 508 places, 646 transitions, 8386 flow. Second operand 8 states and 200 transitions. [2024-06-04 16:12:33,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 687 transitions, 10515 flow [2024-06-04 16:12:40,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 687 transitions, 10369 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-04 16:12:40,249 INFO L231 Difference]: Finished difference. Result has 514 places, 652 transitions, 8670 flow [2024-06-04 16:12:40,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8242, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8670, PETRI_PLACES=514, PETRI_TRANSITIONS=652} [2024-06-04 16:12:40,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-04 16:12:40,250 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 652 transitions, 8670 flow [2024-06-04 16:12:40,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:40,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:40,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:40,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-04 16:12:40,251 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:40,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 396287053, now seen corresponding path program 2 times [2024-06-04 16:12:40,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:40,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355500386] [2024-06-04 16:12:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:40,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:40,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:40,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355500386] [2024-06-04 16:12:40,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355500386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:40,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:40,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:40,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007705731] [2024-06-04 16:12:40,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:40,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:40,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:40,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:40,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:40,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:40,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 652 transitions, 8670 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:40,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:40,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:40,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:42,409 INFO L124 PetriNetUnfolderBase]: 4343/7465 cut-off events. [2024-06-04 16:12:42,409 INFO L125 PetriNetUnfolderBase]: For 1039674/1039674 co-relation queries the response was YES. [2024-06-04 16:12:42,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54944 conditions, 7465 events. 4343/7465 cut-off events. For 1039674/1039674 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 54067 event pairs, 829 based on Foata normal form. 6/7466 useless extension candidates. Maximal degree in co-relation 54730. Up to 6412 conditions per place. [2024-06-04 16:12:42,533 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 631 selfloop transitions, 62 changer transitions 0/700 dead transitions. [2024-06-04 16:12:42,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 700 transitions, 10274 flow [2024-06-04 16:12:42,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-04 16:12:42,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-04 16:12:42,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 244 transitions. [2024-06-04 16:12:42,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.580952380952381 [2024-06-04 16:12:42,534 INFO L175 Difference]: Start difference. First operand has 514 places, 652 transitions, 8670 flow. Second operand 10 states and 244 transitions. [2024-06-04 16:12:42,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 700 transitions, 10274 flow [2024-06-04 16:12:48,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 700 transitions, 10151 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-04 16:12:48,672 INFO L231 Difference]: Finished difference. Result has 522 places, 653 transitions, 8705 flow [2024-06-04 16:12:48,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8547, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8705, PETRI_PLACES=522, PETRI_TRANSITIONS=653} [2024-06-04 16:12:48,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 479 predicate places. [2024-06-04 16:12:48,673 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 653 transitions, 8705 flow [2024-06-04 16:12:48,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:48,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:48,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:48,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-04 16:12:48,673 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:48,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:48,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1401652439, now seen corresponding path program 2 times [2024-06-04 16:12:48,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:48,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310666896] [2024-06-04 16:12:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:48,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:48,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:48,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310666896] [2024-06-04 16:12:48,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310666896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:48,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:48,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:12:48,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932691429] [2024-06-04 16:12:48,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:48,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:12:48,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:48,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:12:48,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:12:49,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:49,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 653 transitions, 8705 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:49,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:49,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:49,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:12:50,691 INFO L124 PetriNetUnfolderBase]: 4445/7615 cut-off events. [2024-06-04 16:12:50,691 INFO L125 PetriNetUnfolderBase]: For 1150965/1150965 co-relation queries the response was YES. [2024-06-04 16:12:50,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57906 conditions, 7615 events. 4445/7615 cut-off events. For 1150965/1150965 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 55204 event pairs, 721 based on Foata normal form. 6/7612 useless extension candidates. Maximal degree in co-relation 57690. Up to 5995 conditions per place. [2024-06-04 16:12:50,831 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 564 selfloop transitions, 120 changer transitions 0/691 dead transitions. [2024-06-04 16:12:50,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 691 transitions, 10867 flow [2024-06-04 16:12:50,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:12:50,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:12:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-04 16:12:50,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-04 16:12:50,832 INFO L175 Difference]: Start difference. First operand has 522 places, 653 transitions, 8705 flow. Second operand 8 states and 194 transitions. [2024-06-04 16:12:50,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 691 transitions, 10867 flow [2024-06-04 16:12:59,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 691 transitions, 10669 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-04 16:12:59,426 INFO L231 Difference]: Finished difference. Result has 521 places, 660 transitions, 8931 flow [2024-06-04 16:12:59,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8519, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8931, PETRI_PLACES=521, PETRI_TRANSITIONS=660} [2024-06-04 16:12:59,427 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 478 predicate places. [2024-06-04 16:12:59,427 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 660 transitions, 8931 flow [2024-06-04 16:12:59,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:59,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:12:59,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:12:59,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-04 16:12:59,428 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:12:59,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:12:59,428 INFO L85 PathProgramCache]: Analyzing trace with hash 573418759, now seen corresponding path program 3 times [2024-06-04 16:12:59,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:12:59,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675495907] [2024-06-04 16:12:59,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:12:59,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:12:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:12:59,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:12:59,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:12:59,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675495907] [2024-06-04 16:12:59,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675495907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:12:59,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:12:59,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:12:59,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018031364] [2024-06-04 16:12:59,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:12:59,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:12:59,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:12:59,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:12:59,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:12:59,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:12:59,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 660 transitions, 8931 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:12:59,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:12:59,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:12:59,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:01,985 INFO L124 PetriNetUnfolderBase]: 4432/7606 cut-off events. [2024-06-04 16:13:01,985 INFO L125 PetriNetUnfolderBase]: For 1121171/1121171 co-relation queries the response was YES. [2024-06-04 16:13:02,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57151 conditions, 7606 events. 4432/7606 cut-off events. For 1121171/1121171 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 55300 event pairs, 711 based on Foata normal form. 6/7603 useless extension candidates. Maximal degree in co-relation 56936. Up to 5989 conditions per place. [2024-06-04 16:13:02,119 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 568 selfloop transitions, 118 changer transitions 0/693 dead transitions. [2024-06-04 16:13:02,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 693 transitions, 10953 flow [2024-06-04 16:13:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:13:02,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:13:02,120 INFO L175 Difference]: Start difference. First operand has 521 places, 660 transitions, 8931 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:13:02,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 693 transitions, 10953 flow [2024-06-04 16:13:10,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 693 transitions, 10738 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:10,727 INFO L231 Difference]: Finished difference. Result has 526 places, 660 transitions, 8956 flow [2024-06-04 16:13:10,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8716, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=542, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8956, PETRI_PLACES=526, PETRI_TRANSITIONS=660} [2024-06-04 16:13:10,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-04 16:13:10,728 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 660 transitions, 8956 flow [2024-06-04 16:13:10,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:10,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:10,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:10,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-04 16:13:10,729 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:10,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:10,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1261770389, now seen corresponding path program 3 times [2024-06-04 16:13:10,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:10,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643042621] [2024-06-04 16:13:10,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:10,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:11,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:11,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643042621] [2024-06-04 16:13:11,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643042621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:11,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:11,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:11,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817367813] [2024-06-04 16:13:11,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:11,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:11,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:11,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:11,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:11,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:11,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 660 transitions, 8956 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:11,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:11,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:11,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:13,222 INFO L124 PetriNetUnfolderBase]: 4485/7703 cut-off events. [2024-06-04 16:13:13,222 INFO L125 PetriNetUnfolderBase]: For 1191181/1191181 co-relation queries the response was YES. [2024-06-04 16:13:13,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58665 conditions, 7703 events. 4485/7703 cut-off events. For 1191181/1191181 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 56010 event pairs, 859 based on Foata normal form. 6/7704 useless extension candidates. Maximal degree in co-relation 58449. Up to 6565 conditions per place. [2024-06-04 16:13:13,347 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 633 selfloop transitions, 68 changer transitions 0/708 dead transitions. [2024-06-04 16:13:13,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 708 transitions, 10852 flow [2024-06-04 16:13:13,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:13:13,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:13:13,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-04 16:13:13,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-06-04 16:13:13,349 INFO L175 Difference]: Start difference. First operand has 526 places, 660 transitions, 8956 flow. Second operand 11 states and 258 transitions. [2024-06-04 16:13:13,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 708 transitions, 10852 flow [2024-06-04 16:13:22,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 708 transitions, 10679 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-04 16:13:22,196 INFO L231 Difference]: Finished difference. Result has 535 places, 662 transitions, 8997 flow [2024-06-04 16:13:22,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8783, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8997, PETRI_PLACES=535, PETRI_TRANSITIONS=662} [2024-06-04 16:13:22,197 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 492 predicate places. [2024-06-04 16:13:22,197 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 662 transitions, 8997 flow [2024-06-04 16:13:22,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:22,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:22,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:22,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-04 16:13:22,197 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:22,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:22,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1320275107, now seen corresponding path program 4 times [2024-06-04 16:13:22,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:22,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401664669] [2024-06-04 16:13:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:22,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:22,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:22,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401664669] [2024-06-04 16:13:22,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401664669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:22,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:22,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:13:22,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986481313] [2024-06-04 16:13:22,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:22,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:13:22,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:22,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:13:22,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:13:22,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:22,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 662 transitions, 8997 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:13:22,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:22,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:22,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:25,024 INFO L124 PetriNetUnfolderBase]: 4652/7982 cut-off events. [2024-06-04 16:13:25,024 INFO L125 PetriNetUnfolderBase]: For 1459922/1459922 co-relation queries the response was YES. [2024-06-04 16:13:25,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64153 conditions, 7982 events. 4652/7982 cut-off events. For 1459922/1459922 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 58333 event pairs, 1044 based on Foata normal form. 6/7971 useless extension candidates. Maximal degree in co-relation 63935. Up to 6144 conditions per place. [2024-06-04 16:13:25,167 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 597 selfloop transitions, 104 changer transitions 0/708 dead transitions. [2024-06-04 16:13:25,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 708 transitions, 11203 flow [2024-06-04 16:13:25,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:25,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:25,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-04 16:13:25,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2024-06-04 16:13:25,168 INFO L175 Difference]: Start difference. First operand has 535 places, 662 transitions, 8997 flow. Second operand 8 states and 209 transitions. [2024-06-04 16:13:25,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 708 transitions, 11203 flow [2024-06-04 16:13:33,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 708 transitions, 10973 flow, removed 21 selfloop flow, removed 10 redundant places. [2024-06-04 16:13:33,219 INFO L231 Difference]: Finished difference. Result has 533 places, 664 transitions, 9055 flow [2024-06-04 16:13:33,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8767, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9055, PETRI_PLACES=533, PETRI_TRANSITIONS=664} [2024-06-04 16:13:33,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 490 predicate places. [2024-06-04 16:13:33,220 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 664 transitions, 9055 flow [2024-06-04 16:13:33,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:13:33,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:33,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:33,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-04 16:13:33,221 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:33,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:33,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1268121433, now seen corresponding path program 5 times [2024-06-04 16:13:33,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:33,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624455989] [2024-06-04 16:13:33,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:33,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:33,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:33,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:33,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624455989] [2024-06-04 16:13:33,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624455989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:33,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:33,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:13:33,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766613456] [2024-06-04 16:13:33,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:33,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:13:33,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:33,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:13:33,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:13:33,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:33,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 664 transitions, 9055 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:13:33,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:33,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:33,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:36,115 INFO L124 PetriNetUnfolderBase]: 4639/7961 cut-off events. [2024-06-04 16:13:36,116 INFO L125 PetriNetUnfolderBase]: For 1429878/1429878 co-relation queries the response was YES. [2024-06-04 16:13:36,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63226 conditions, 7961 events. 4639/7961 cut-off events. For 1429878/1429878 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 58222 event pairs, 1142 based on Foata normal form. 6/7960 useless extension candidates. Maximal degree in co-relation 63009. Up to 7020 conditions per place. [2024-06-04 16:13:36,249 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 624 selfloop transitions, 65 changer transitions 0/696 dead transitions. [2024-06-04 16:13:36,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 696 transitions, 10557 flow [2024-06-04 16:13:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:13:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:13:36,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-04 16:13:36,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-04 16:13:36,251 INFO L175 Difference]: Start difference. First operand has 533 places, 664 transitions, 9055 flow. Second operand 8 states and 195 transitions. [2024-06-04 16:13:36,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 696 transitions, 10557 flow [2024-06-04 16:13:44,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 696 transitions, 10294 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-04 16:13:44,940 INFO L231 Difference]: Finished difference. Result has 536 places, 664 transitions, 8926 flow [2024-06-04 16:13:44,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8792, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8926, PETRI_PLACES=536, PETRI_TRANSITIONS=664} [2024-06-04 16:13:44,941 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 493 predicate places. [2024-06-04 16:13:44,941 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 664 transitions, 8926 flow [2024-06-04 16:13:44,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:13:44,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:44,941 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, 1] [2024-06-04 16:13:44,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-04 16:13:44,941 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:44,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:44,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1268121247, now seen corresponding path program 4 times [2024-06-04 16:13:44,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:44,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14291445] [2024-06-04 16:13:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:44,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:45,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:45,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14291445] [2024-06-04 16:13:45,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14291445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:45,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:45,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:45,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792992304] [2024-06-04 16:13:45,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:45,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:45,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:45,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:45,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:45,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 664 transitions, 8926 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:45,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:45,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:45,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:13:47,588 INFO L124 PetriNetUnfolderBase]: 4626/7914 cut-off events. [2024-06-04 16:13:47,588 INFO L125 PetriNetUnfolderBase]: For 1395206/1395206 co-relation queries the response was YES. [2024-06-04 16:13:47,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61943 conditions, 7914 events. 4626/7914 cut-off events. For 1395206/1395206 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 57776 event pairs, 1146 based on Foata normal form. 6/7911 useless extension candidates. Maximal degree in co-relation 61725. Up to 6791 conditions per place. [2024-06-04 16:13:47,722 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 588 selfloop transitions, 95 changer transitions 0/690 dead transitions. [2024-06-04 16:13:47,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 690 transitions, 10656 flow [2024-06-04 16:13:47,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:13:47,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:13:47,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-04 16:13:47,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-04 16:13:47,723 INFO L175 Difference]: Start difference. First operand has 536 places, 664 transitions, 8926 flow. Second operand 7 states and 171 transitions. [2024-06-04 16:13:47,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 690 transitions, 10656 flow [2024-06-04 16:13:58,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 535 places, 690 transitions, 10501 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:13:58,751 INFO L231 Difference]: Finished difference. Result has 536 places, 664 transitions, 8965 flow [2024-06-04 16:13:58,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8771, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8965, PETRI_PLACES=536, PETRI_TRANSITIONS=664} [2024-06-04 16:13:58,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 493 predicate places. [2024-06-04 16:13:58,752 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 664 transitions, 8965 flow [2024-06-04 16:13:58,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:58,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:13:58,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:13:58,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-04 16:13:58,753 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:13:58,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:13:58,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1160873231, now seen corresponding path program 6 times [2024-06-04 16:13:58,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:13:58,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14532837] [2024-06-04 16:13:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:13:58,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:13:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:13:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:13:59,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:13:59,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14532837] [2024-06-04 16:13:59,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14532837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:13:59,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:13:59,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:13:59,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842145111] [2024-06-04 16:13:59,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:13:59,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:13:59,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:13:59,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:13:59,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:13:59,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:13:59,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 664 transitions, 8965 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:13:59,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:13:59,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:13:59,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:01,449 INFO L124 PetriNetUnfolderBase]: 4654/8003 cut-off events. [2024-06-04 16:14:01,449 INFO L125 PetriNetUnfolderBase]: For 1435144/1435144 co-relation queries the response was YES. [2024-06-04 16:14:01,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62616 conditions, 8003 events. 4654/8003 cut-off events. For 1435144/1435144 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 58654 event pairs, 1158 based on Foata normal form. 8/8004 useless extension candidates. Maximal degree in co-relation 62397. Up to 6726 conditions per place. [2024-06-04 16:14:01,599 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 635 selfloop transitions, 68 changer transitions 0/710 dead transitions. [2024-06-04 16:14:01,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 710 transitions, 10859 flow [2024-06-04 16:14:01,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:01,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-04 16:14:01,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5978835978835979 [2024-06-04 16:14:01,601 INFO L175 Difference]: Start difference. First operand has 536 places, 664 transitions, 8965 flow. Second operand 9 states and 226 transitions. [2024-06-04 16:14:01,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 710 transitions, 10859 flow [2024-06-04 16:14:11,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 710 transitions, 10692 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:14:11,213 INFO L231 Difference]: Finished difference. Result has 539 places, 665 transitions, 8974 flow [2024-06-04 16:14:11,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8798, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8974, PETRI_PLACES=539, PETRI_TRANSITIONS=665} [2024-06-04 16:14:11,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 496 predicate places. [2024-06-04 16:14:11,214 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 665 transitions, 8974 flow [2024-06-04 16:14:11,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:11,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:11,214 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, 1] [2024-06-04 16:14:11,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-04 16:14:11,214 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:11,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:11,215 INFO L85 PathProgramCache]: Analyzing trace with hash 2078849421, now seen corresponding path program 7 times [2024-06-04 16:14:11,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:11,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672759600] [2024-06-04 16:14:11,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:11,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:11,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:11,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672759600] [2024-06-04 16:14:11,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672759600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:11,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:11,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:11,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642813965] [2024-06-04 16:14:11,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:11,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:11,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:11,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:11,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:11,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:11,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 665 transitions, 8974 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:14:11,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:11,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:11,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:13,898 INFO L124 PetriNetUnfolderBase]: 4682/8051 cut-off events. [2024-06-04 16:14:13,898 INFO L125 PetriNetUnfolderBase]: For 1456462/1456462 co-relation queries the response was YES. [2024-06-04 16:14:14,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63129 conditions, 8051 events. 4682/8051 cut-off events. For 1456462/1456462 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 59056 event pairs, 1180 based on Foata normal form. 8/8052 useless extension candidates. Maximal degree in co-relation 62909. Up to 7100 conditions per place. [2024-06-04 16:14:14,030 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 593 selfloop transitions, 94 changer transitions 0/694 dead transitions. [2024-06-04 16:14:14,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 694 transitions, 10488 flow [2024-06-04 16:14:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:14,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-04 16:14:14,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-04 16:14:14,032 INFO L175 Difference]: Start difference. First operand has 539 places, 665 transitions, 8974 flow. Second operand 8 states and 196 transitions. [2024-06-04 16:14:14,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 694 transitions, 10488 flow [2024-06-04 16:14:24,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 694 transitions, 10228 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-04 16:14:24,089 INFO L231 Difference]: Finished difference. Result has 539 places, 666 transitions, 8950 flow [2024-06-04 16:14:24,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8724, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8950, PETRI_PLACES=539, PETRI_TRANSITIONS=666} [2024-06-04 16:14:24,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 496 predicate places. [2024-06-04 16:14:24,089 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 666 transitions, 8950 flow [2024-06-04 16:14:24,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:14:24,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:24,090 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, 1, 1, 1] [2024-06-04 16:14:24,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-04 16:14:24,090 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:24,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:24,090 INFO L85 PathProgramCache]: Analyzing trace with hash 229253965, now seen corresponding path program 8 times [2024-06-04 16:14:24,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:24,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152308627] [2024-06-04 16:14:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:24,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:24,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:24,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:24,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152308627] [2024-06-04 16:14:24,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152308627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:24,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:24,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:24,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305773889] [2024-06-04 16:14:24,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:24,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:24,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:24,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:24,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:24,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:24,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 666 transitions, 8950 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:14:24,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:24,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:24,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:26,728 INFO L124 PetriNetUnfolderBase]: 4756/8165 cut-off events. [2024-06-04 16:14:26,728 INFO L125 PetriNetUnfolderBase]: For 1530102/1530102 co-relation queries the response was YES. [2024-06-04 16:14:26,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64964 conditions, 8165 events. 4756/8165 cut-off events. For 1530102/1530102 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 59956 event pairs, 1190 based on Foata normal form. 6/8164 useless extension candidates. Maximal degree in co-relation 64743. Up to 7211 conditions per place. [2024-06-04 16:14:26,859 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 623 selfloop transitions, 70 changer transitions 0/700 dead transitions. [2024-06-04 16:14:26,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 700 transitions, 10823 flow [2024-06-04 16:14:26,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-04 16:14:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-04 16:14:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-04 16:14:26,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5608465608465608 [2024-06-04 16:14:26,861 INFO L175 Difference]: Start difference. First operand has 539 places, 666 transitions, 8950 flow. Second operand 9 states and 212 transitions. [2024-06-04 16:14:26,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 700 transitions, 10823 flow [2024-06-04 16:14:36,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 700 transitions, 10620 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-04 16:14:36,569 INFO L231 Difference]: Finished difference. Result has 542 places, 670 transitions, 9009 flow [2024-06-04 16:14:36,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8749, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=666, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9009, PETRI_PLACES=542, PETRI_TRANSITIONS=670} [2024-06-04 16:14:36,570 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 499 predicate places. [2024-06-04 16:14:36,570 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 670 transitions, 9009 flow [2024-06-04 16:14:36,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:14:36,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:36,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:36,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-04 16:14:36,570 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:36,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:36,571 INFO L85 PathProgramCache]: Analyzing trace with hash -2100826705, now seen corresponding path program 9 times [2024-06-04 16:14:36,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:36,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215972226] [2024-06-04 16:14:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:36,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:36,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:36,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:36,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215972226] [2024-06-04 16:14:36,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215972226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:36,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:36,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:14:36,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293977328] [2024-06-04 16:14:36,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:36,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:14:36,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:36,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:14:36,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:14:36,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:36,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 670 transitions, 9009 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:14:36,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:36,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:36,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:39,477 INFO L124 PetriNetUnfolderBase]: 4738/8143 cut-off events. [2024-06-04 16:14:39,477 INFO L125 PetriNetUnfolderBase]: For 1476660/1476660 co-relation queries the response was YES. [2024-06-04 16:14:39,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63649 conditions, 8143 events. 4738/8143 cut-off events. For 1476660/1476660 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 59843 event pairs, 1190 based on Foata normal form. 8/8144 useless extension candidates. Maximal degree in co-relation 63427. Up to 7233 conditions per place. [2024-06-04 16:14:39,608 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 621 selfloop transitions, 67 changer transitions 0/695 dead transitions. [2024-06-04 16:14:39,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 695 transitions, 10479 flow [2024-06-04 16:14:39,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:14:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:14:39,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-04 16:14:39,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-04 16:14:39,609 INFO L175 Difference]: Start difference. First operand has 542 places, 670 transitions, 9009 flow. Second operand 8 states and 191 transitions. [2024-06-04 16:14:39,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 695 transitions, 10479 flow [2024-06-04 16:14:50,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 695 transitions, 10308 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-04 16:14:50,904 INFO L231 Difference]: Finished difference. Result has 544 places, 670 transitions, 8980 flow [2024-06-04 16:14:50,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8838, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8980, PETRI_PLACES=544, PETRI_TRANSITIONS=670} [2024-06-04 16:14:50,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 501 predicate places. [2024-06-04 16:14:50,905 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 670 transitions, 8980 flow [2024-06-04 16:14:50,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:14:50,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:14:50,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:14:50,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-04 16:14:50,905 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:14:50,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:14:50,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1002423967, now seen corresponding path program 5 times [2024-06-04 16:14:50,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:14:50,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344850167] [2024-06-04 16:14:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:14:50,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:14:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:14:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:14:51,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:14:51,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344850167] [2024-06-04 16:14:51,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344850167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:14:51,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:14:51,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:14:51,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349929067] [2024-06-04 16:14:51,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:14:51,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:14:51,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:14:51,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:14:51,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:14:51,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:14:51,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 670 transitions, 8980 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:14:51,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:14:51,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:14:51,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:14:53,644 INFO L124 PetriNetUnfolderBase]: 4804/8233 cut-off events. [2024-06-04 16:14:53,644 INFO L125 PetriNetUnfolderBase]: For 1554137/1554137 co-relation queries the response was YES. [2024-06-04 16:14:53,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65480 conditions, 8233 events. 4804/8233 cut-off events. For 1554137/1554137 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 60537 event pairs, 1205 based on Foata normal form. 6/8230 useless extension candidates. Maximal degree in co-relation 65257. Up to 7193 conditions per place. [2024-06-04 16:14:53,789 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 601 selfloop transitions, 86 changer transitions 0/694 dead transitions. [2024-06-04 16:14:53,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 694 transitions, 10782 flow [2024-06-04 16:14:53,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:14:53,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:14:53,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-04 16:14:53,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-04 16:14:53,790 INFO L175 Difference]: Start difference. First operand has 544 places, 670 transitions, 8980 flow. Second operand 7 states and 170 transitions. [2024-06-04 16:14:53,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 694 transitions, 10782 flow [2024-06-04 16:15:05,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 694 transitions, 10654 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:05,228 INFO L231 Difference]: Finished difference. Result has 545 places, 672 transitions, 9096 flow [2024-06-04 16:15:05,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8852, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9096, PETRI_PLACES=545, PETRI_TRANSITIONS=672} [2024-06-04 16:15:05,229 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 502 predicate places. [2024-06-04 16:15:05,229 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 672 transitions, 9096 flow [2024-06-04 16:15:05,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:05,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:05,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:05,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-04 16:15:05,229 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:05,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:05,230 INFO L85 PathProgramCache]: Analyzing trace with hash -125339611, now seen corresponding path program 6 times [2024-06-04 16:15:05,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:05,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442203802] [2024-06-04 16:15:05,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:05,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:05,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:05,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:05,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442203802] [2024-06-04 16:15:05,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442203802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:05,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:05,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:05,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48112405] [2024-06-04 16:15:05,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:05,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:05,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:05,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:05,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:05,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:05,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 672 transitions, 9096 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:05,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:05,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:05,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:07,814 INFO L124 PetriNetUnfolderBase]: 4786/8207 cut-off events. [2024-06-04 16:15:07,814 INFO L125 PetriNetUnfolderBase]: For 1523102/1523102 co-relation queries the response was YES. [2024-06-04 16:15:07,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64488 conditions, 8207 events. 4786/8207 cut-off events. For 1523102/1523102 co-relation queries the response was YES. Maximal size of possible extension queue 634. Compared 60372 event pairs, 1215 based on Foata normal form. 8/8206 useless extension candidates. Maximal degree in co-relation 64264. Up to 7229 conditions per place. [2024-06-04 16:15:07,957 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 597 selfloop transitions, 86 changer transitions 0/690 dead transitions. [2024-06-04 16:15:07,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 690 transitions, 10534 flow [2024-06-04 16:15:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:07,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:07,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-04 16:15:07,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-04 16:15:07,958 INFO L175 Difference]: Start difference. First operand has 545 places, 672 transitions, 9096 flow. Second operand 7 states and 169 transitions. [2024-06-04 16:15:07,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 690 transitions, 10534 flow [2024-06-04 16:15:18,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 690 transitions, 10413 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-04 16:15:18,792 INFO L231 Difference]: Finished difference. Result has 549 places, 672 transitions, 9156 flow [2024-06-04 16:15:18,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8975, PETRI_DIFFERENCE_MINUEND_PLACES=542, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9156, PETRI_PLACES=549, PETRI_TRANSITIONS=672} [2024-06-04 16:15:18,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 506 predicate places. [2024-06-04 16:15:18,793 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 672 transitions, 9156 flow [2024-06-04 16:15:18,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:18,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:18,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:18,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-04 16:15:18,793 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:18,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:18,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1477576577, now seen corresponding path program 10 times [2024-06-04 16:15:18,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:18,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662965109] [2024-06-04 16:15:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:18,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:19,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:19,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662965109] [2024-06-04 16:15:19,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662965109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:19,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:19,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:19,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833459145] [2024-06-04 16:15:19,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:19,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:19,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:19,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:19,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:19,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:19,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 672 transitions, 9156 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:19,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:19,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:19,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:21,638 INFO L124 PetriNetUnfolderBase]: 4814/8273 cut-off events. [2024-06-04 16:15:21,638 INFO L125 PetriNetUnfolderBase]: For 1543250/1543250 co-relation queries the response was YES. [2024-06-04 16:15:21,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65115 conditions, 8273 events. 4814/8273 cut-off events. For 1543250/1543250 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 60950 event pairs, 1198 based on Foata normal form. 8/8276 useless extension candidates. Maximal degree in co-relation 64889. Up to 7380 conditions per place. [2024-06-04 16:15:21,790 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 645 selfloop transitions, 56 changer transitions 0/708 dead transitions. [2024-06-04 16:15:21,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 708 transitions, 10708 flow [2024-06-04 16:15:21,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-04 16:15:21,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-04 16:15:21,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 266 transitions. [2024-06-04 16:15:21,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-04 16:15:21,791 INFO L175 Difference]: Start difference. First operand has 549 places, 672 transitions, 9156 flow. Second operand 12 states and 266 transitions. [2024-06-04 16:15:21,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 708 transitions, 10708 flow [2024-06-04 16:15:31,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 708 transitions, 10537 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-04 16:15:31,777 INFO L231 Difference]: Finished difference. Result has 556 places, 673 transitions, 9136 flow [2024-06-04 16:15:31,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8985, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9136, PETRI_PLACES=556, PETRI_TRANSITIONS=673} [2024-06-04 16:15:31,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 513 predicate places. [2024-06-04 16:15:31,778 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 673 transitions, 9136 flow [2024-06-04 16:15:31,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:31,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:31,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:31,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-04 16:15:31,778 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:31,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1628676263, now seen corresponding path program 11 times [2024-06-04 16:15:31,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:31,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937700344] [2024-06-04 16:15:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:31,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:31,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:32,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:32,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937700344] [2024-06-04 16:15:32,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937700344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:32,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:32,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-04 16:15:32,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653802060] [2024-06-04 16:15:32,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:32,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-04 16:15:32,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:32,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-04 16:15:32,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-04 16:15:32,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:32,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 673 transitions, 9136 flow. Second operand has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:15:32,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:32,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:32,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:34,681 INFO L124 PetriNetUnfolderBase]: 4937/8456 cut-off events. [2024-06-04 16:15:34,682 INFO L125 PetriNetUnfolderBase]: For 1682378/1682378 co-relation queries the response was YES. [2024-06-04 16:15:34,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68677 conditions, 8456 events. 4937/8456 cut-off events. For 1682378/1682378 co-relation queries the response was YES. Maximal size of possible extension queue 645. Compared 62345 event pairs, 1211 based on Foata normal form. 6/8447 useless extension candidates. Maximal degree in co-relation 68450. Up to 7330 conditions per place. [2024-06-04 16:15:34,827 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 617 selfloop transitions, 91 changer transitions 0/715 dead transitions. [2024-06-04 16:15:34,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 715 transitions, 11159 flow [2024-06-04 16:15:34,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-04 16:15:34,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-04 16:15:34,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-04 16:15:34,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5411255411255411 [2024-06-04 16:15:34,828 INFO L175 Difference]: Start difference. First operand has 556 places, 673 transitions, 9136 flow. Second operand 11 states and 250 transitions. [2024-06-04 16:15:34,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 715 transitions, 11159 flow [2024-06-04 16:15:44,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 715 transitions, 11032 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-04 16:15:44,665 INFO L231 Difference]: Finished difference. Result has 559 places, 681 transitions, 9420 flow [2024-06-04 16:15:44,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9009, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9420, PETRI_PLACES=559, PETRI_TRANSITIONS=681} [2024-06-04 16:15:44,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 516 predicate places. [2024-06-04 16:15:44,666 INFO L495 AbstractCegarLoop]: Abstraction has has 559 places, 681 transitions, 9420 flow [2024-06-04 16:15:44,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.8) internal successors, (158), 10 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) [2024-06-04 16:15:44,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:44,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:44,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-04 16:15:44,667 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:44,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:44,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1628676449, now seen corresponding path program 7 times [2024-06-04 16:15:44,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:44,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138654591] [2024-06-04 16:15:44,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:44,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:44,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:44,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:44,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138654591] [2024-06-04 16:15:44,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138654591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:44,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:44,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-04 16:15:44,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459751455] [2024-06-04 16:15:44,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:44,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-04 16:15:44,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:44,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-04 16:15:44,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-04 16:15:45,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:45,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 559 places, 681 transitions, 9420 flow. Second operand has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:45,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:45,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:45,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:15:47,424 INFO L124 PetriNetUnfolderBase]: 4957/8463 cut-off events. [2024-06-04 16:15:47,425 INFO L125 PetriNetUnfolderBase]: For 1708102/1708102 co-relation queries the response was YES. [2024-06-04 16:15:47,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69355 conditions, 8463 events. 4957/8463 cut-off events. For 1708102/1708102 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 62148 event pairs, 809 based on Foata normal form. 6/8460 useless extension candidates. Maximal degree in co-relation 69125. Up to 6729 conditions per place. [2024-06-04 16:15:47,585 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 577 selfloop transitions, 131 changer transitions 0/715 dead transitions. [2024-06-04 16:15:47,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 715 transitions, 11569 flow [2024-06-04 16:15:47,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:15:47,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:15:47,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-04 16:15:47,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-04 16:15:47,586 INFO L175 Difference]: Start difference. First operand has 559 places, 681 transitions, 9420 flow. Second operand 7 states and 182 transitions. [2024-06-04 16:15:47,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 715 transitions, 11569 flow [2024-06-04 16:15:58,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 715 transitions, 11396 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-04 16:15:58,953 INFO L231 Difference]: Finished difference. Result has 560 places, 682 transitions, 9549 flow [2024-06-04 16:15:58,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9247, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9549, PETRI_PLACES=560, PETRI_TRANSITIONS=682} [2024-06-04 16:15:58,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 517 predicate places. [2024-06-04 16:15:58,954 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 682 transitions, 9549 flow [2024-06-04 16:15:58,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.0) internal successors, (144), 9 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:58,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:15:58,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:15:58,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-04 16:15:58,954 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:15:58,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:15:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash 470747233, now seen corresponding path program 8 times [2024-06-04 16:15:58,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:15:58,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609858594] [2024-06-04 16:15:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:15:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:15:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:15:59,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:15:59,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:15:59,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609858594] [2024-06-04 16:15:59,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609858594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:15:59,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:15:59,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:15:59,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131546082] [2024-06-04 16:15:59,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:15:59,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:15:59,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:15:59,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:15:59,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:15:59,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:15:59,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 682 transitions, 9549 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:15:59,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:15:59,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:15:59,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:01,762 INFO L124 PetriNetUnfolderBase]: 5005/8570 cut-off events. [2024-06-04 16:16:01,762 INFO L125 PetriNetUnfolderBase]: For 1795055/1795055 co-relation queries the response was YES. [2024-06-04 16:16:01,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71010 conditions, 8570 events. 5005/8570 cut-off events. For 1795055/1795055 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 63312 event pairs, 1155 based on Foata normal form. 8/8569 useless extension candidates. Maximal degree in co-relation 70779. Up to 7388 conditions per place. [2024-06-04 16:16:01,910 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 588 selfloop transitions, 113 changer transitions 0/708 dead transitions. [2024-06-04 16:16:01,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 708 transitions, 11413 flow [2024-06-04 16:16:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-04 16:16:01,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-04 16:16:01,911 INFO L175 Difference]: Start difference. First operand has 560 places, 682 transitions, 9549 flow. Second operand 8 states and 192 transitions. [2024-06-04 16:16:01,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 708 transitions, 11413 flow [2024-06-04 16:16:14,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 561 places, 708 transitions, 11152 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:14,744 INFO L231 Difference]: Finished difference. Result has 563 places, 684 transitions, 9627 flow [2024-06-04 16:16:14,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9295, PETRI_DIFFERENCE_MINUEND_PLACES=554, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9627, PETRI_PLACES=563, PETRI_TRANSITIONS=684} [2024-06-04 16:16:14,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 520 predicate places. [2024-06-04 16:16:14,745 INFO L495 AbstractCegarLoop]: Abstraction has has 563 places, 684 transitions, 9627 flow [2024-06-04 16:16:14,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:14,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:14,745 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, 1] [2024-06-04 16:16:14,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-04 16:16:14,746 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:14,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:14,746 INFO L85 PathProgramCache]: Analyzing trace with hash 152290835, now seen corresponding path program 9 times [2024-06-04 16:16:14,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:14,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563086365] [2024-06-04 16:16:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:14,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:14,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:15,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:15,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:15,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563086365] [2024-06-04 16:16:15,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563086365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:15,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:15,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:15,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677497599] [2024-06-04 16:16:15,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:15,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:15,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:15,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:15,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:15,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:15,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 563 places, 684 transitions, 9627 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:15,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:15,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:15,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:17,499 INFO L124 PetriNetUnfolderBase]: 4992/8522 cut-off events. [2024-06-04 16:16:17,499 INFO L125 PetriNetUnfolderBase]: For 1691699/1691699 co-relation queries the response was YES. [2024-06-04 16:16:17,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69709 conditions, 8522 events. 4992/8522 cut-off events. For 1691699/1691699 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 62661 event pairs, 844 based on Foata normal form. 6/8519 useless extension candidates. Maximal degree in co-relation 69478. Up to 6751 conditions per place. [2024-06-04 16:16:17,642 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 574 selfloop transitions, 132 changer transitions 0/713 dead transitions. [2024-06-04 16:16:17,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 713 transitions, 11715 flow [2024-06-04 16:16:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-04 16:16:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-04 16:16:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-04 16:16:17,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-04 16:16:17,644 INFO L175 Difference]: Start difference. First operand has 563 places, 684 transitions, 9627 flow. Second operand 7 states and 175 transitions. [2024-06-04 16:16:17,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 713 transitions, 11715 flow [2024-06-04 16:16:30,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 713 transitions, 11425 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-04 16:16:30,766 INFO L231 Difference]: Finished difference. Result has 564 places, 684 transitions, 9607 flow [2024-06-04 16:16:30,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9337, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9607, PETRI_PLACES=564, PETRI_TRANSITIONS=684} [2024-06-04 16:16:30,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 521 predicate places. [2024-06-04 16:16:30,766 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 684 transitions, 9607 flow [2024-06-04 16:16:30,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:30,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:30,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:30,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-04 16:16:30,767 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:30,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:30,767 INFO L85 PathProgramCache]: Analyzing trace with hash 473604193, now seen corresponding path program 10 times [2024-06-04 16:16:30,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:30,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058219944] [2024-06-04 16:16:30,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:30,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:31,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:31,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:31,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058219944] [2024-06-04 16:16:31,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058219944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:31,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:31,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:31,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026146130] [2024-06-04 16:16:31,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:31,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:31,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:31,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:31,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:31,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:31,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 684 transitions, 9607 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:31,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:31,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:31,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:33,621 INFO L124 PetriNetUnfolderBase]: 5020/8587 cut-off events. [2024-06-04 16:16:33,621 INFO L125 PetriNetUnfolderBase]: For 1734426/1734426 co-relation queries the response was YES. [2024-06-04 16:16:33,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70322 conditions, 8587 events. 5020/8587 cut-off events. For 1734426/1734426 co-relation queries the response was YES. Maximal size of possible extension queue 658. Compared 63453 event pairs, 1280 based on Foata normal form. 8/8586 useless extension candidates. Maximal degree in co-relation 70090. Up to 7595 conditions per place. [2024-06-04 16:16:33,763 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 599 selfloop transitions, 98 changer transitions 0/704 dead transitions. [2024-06-04 16:16:33,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 704 transitions, 11111 flow [2024-06-04 16:16:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-04 16:16:33,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-04 16:16:33,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-04 16:16:33,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-04 16:16:33,764 INFO L175 Difference]: Start difference. First operand has 564 places, 684 transitions, 9607 flow. Second operand 8 states and 188 transitions. [2024-06-04 16:16:33,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 704 transitions, 11111 flow [2024-06-04 16:16:46,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 704 transitions, 10792 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-04 16:16:46,747 INFO L231 Difference]: Finished difference. Result has 565 places, 685 transitions, 9531 flow [2024-06-04 16:16:46,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9291, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9531, PETRI_PLACES=565, PETRI_TRANSITIONS=685} [2024-06-04 16:16:46,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 522 predicate places. [2024-06-04 16:16:46,748 INFO L495 AbstractCegarLoop]: Abstraction has has 565 places, 685 transitions, 9531 flow [2024-06-04 16:16:46,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:46,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-04 16:16:46,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-04 16:16:46,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-04 16:16:46,749 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-04 16:16:46,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-04 16:16:46,749 INFO L85 PathProgramCache]: Analyzing trace with hash 245703043, now seen corresponding path program 11 times [2024-06-04 16:16:46,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-04 16:16:46,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401320927] [2024-06-04 16:16:46,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-04 16:16:46,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-04 16:16:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-04 16:16:47,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-04 16:16:47,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-04 16:16:47,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401320927] [2024-06-04 16:16:47,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401320927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-04 16:16:47,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-04 16:16:47,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-04 16:16:47,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424652025] [2024-06-04 16:16:47,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-04 16:16:47,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-04 16:16:47,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-04 16:16:47,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-04 16:16:47,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-04 16:16:47,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-04 16:16:47,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 565 places, 685 transitions, 9531 flow. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-04 16:16:47,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-04 16:16:47,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-04 16:16:47,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-04 16:16:49,509 INFO L124 PetriNetUnfolderBase]: 5002/8555 cut-off events. [2024-06-04 16:16:49,509 INFO L125 PetriNetUnfolderBase]: For 1654914/1654914 co-relation queries the response was YES. [2024-06-04 16:16:49,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68399 conditions, 8555 events. 5002/8555 cut-off events. For 1654914/1654914 co-relation queries the response was YES. Maximal size of possible extension queue 657. Compared 63217 event pairs, 1269 based on Foata normal form. 8/8554 useless extension candidates. Maximal degree in co-relation 68168. Up to 7525 conditions per place. [2024-06-04 16:16:49,660 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 601 selfloop transitions, 94 changer transitions 0/702 dead transitions. [2024-06-04 16:16:49,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 570 places, 702 transitions, 10991 flow [2024-06-04 16:16:49,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-04 16:16:49,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-04 16:16:49,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-04 16:16:49,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-04 16:16:49,661 INFO L175 Difference]: Start difference. First operand has 565 places, 685 transitions, 9531 flow. Second operand 6 states and 148 transitions. [2024-06-04 16:16:49,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 570 places, 702 transitions, 10991 flow Killed by 15