./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.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/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.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/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 20:46:26,741 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:46:26,802 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:46:26,808 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:46:26,808 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:46:26,830 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:46:26,832 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:46:26,833 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:46:26,833 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:46:26,836 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:46:26,836 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:46:26,836 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:46:26,837 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:46:26,838 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:46:26,838 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:46:26,839 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:46:26,839 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:46:26,839 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:46:26,839 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:46:26,839 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:46:26,840 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:46:26,840 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:46:26,840 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:46:26,840 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:46:26,841 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:46:26,841 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:46:26,841 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:46:26,841 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:46:26,842 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:46:26,842 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:46:26,843 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:46:26,843 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:46:26,843 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:46:26,843 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:46:26,843 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:46:26,843 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:46:26,844 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:46:26,844 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:46:26,844 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:46:26,844 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:46:26,844 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:46:26,845 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:46:26,845 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:46:26,845 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:46:27,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:46:27,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:46:27,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:46:27,078 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:46:27,078 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:46:27,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:46:28,028 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:46:28,252 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:46:28,253 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:46:28,265 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c47c3cac2/732ca2a4a2e142a8b8b4615ac9d3a3a5/FLAGf3e36c0d4 [2024-06-03 20:46:28,274 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c47c3cac2/732ca2a4a2e142a8b8b4615ac9d3a3a5 [2024-06-03 20:46:28,276 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:46:28,276 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:46:28,277 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-03 20:46:28,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:46:28,402 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:46:28,404 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:46:28,404 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:46:28,408 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:46:28,408 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:46:28" (1/2) ... [2024-06-03 20:46:28,409 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2269b40e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:46:28, skipping insertion in model container [2024-06-03 20:46:28,409 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:46:28" (1/2) ... [2024-06-03 20:46:28,411 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7747e27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:46:28, skipping insertion in model container [2024-06-03 20:46:28,411 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:46:28" (2/2) ... [2024-06-03 20:46:28,413 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2269b40e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:28, skipping insertion in model container [2024-06-03 20:46:28,413 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:46:28" (2/2) ... [2024-06-03 20:46:28,413 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:46:28,454 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:46:28,455 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 20:46:28,455 INFO L97 edCorrectnessWitness]: Location invariant before [L778-L778] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 20:46:28,455 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || (((((((((((((((((((((long long )__unbuffered_cnt + (long long )__unbuffered_p0_EAX >= 0LL && (long long )__unbuffered_cnt + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p0_EBX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )main$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_EBX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )y >= 0LL) && (long long )main$tmp_guard1 + (long long )x >= 0LL) && (long long )main$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL))) && (! multithreaded || (((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p0_EAX) && 0 <= __unbuffered_p0_EBX) && 0 <= __unbuffered_p2_EAX) && 0 <= x) && 0 <= y) && __unbuffered_p0_EAX <= 1) && __unbuffered_p0_EBX <= 1) && __unbuffered_p2_EAX <= 1) && x <= 1) && y <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-03 20:46:28,456 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:46:28,456 INFO L106 edCorrectnessWitness]: ghost_update [L776-L776] multithreaded = 1; [2024-06-03 20:46:28,490 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:46:28,759 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:46:28,767 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:46:28,868 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:46:28,893 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:46:28,894 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:28 WrapperNode [2024-06-03 20:46:28,894 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:46:28,895 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:46:28,895 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:46:28,895 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:46:28,911 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 03.06 08:46:28" (1/1) ... [2024-06-03 20:46:28,927 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 03.06 08:46:28" (1/1) ... [2024-06-03 20:46:28,947 INFO L138 Inliner]: procedures = 175, calls = 40, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-03 20:46:28,948 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:46:28,948 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:46:28,948 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:46:28,948 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:46:28,956 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:28" (1/1) ... [2024-06-03 20:46:28,956 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:28" (1/1) ... [2024-06-03 20:46:28,975 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:28" (1/1) ... [2024-06-03 20:46:28,989 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 20:46:28,989 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:28" (1/1) ... [2024-06-03 20:46:28,989 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:28" (1/1) ... [2024-06-03 20:46:28,994 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:28" (1/1) ... [2024-06-03 20:46:28,995 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:28" (1/1) ... [2024-06-03 20:46:29,012 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:28" (1/1) ... [2024-06-03 20:46:29,013 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:28" (1/1) ... [2024-06-03 20:46:29,015 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:46:29,016 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:46:29,016 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:46:29,016 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:46:29,017 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:28" (1/1) ... [2024-06-03 20:46:29,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:46:29,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:46:29,048 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 20:46:29,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 20:46:29,080 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:46:29,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:46:29,080 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:46:29,081 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:46:29,081 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:46:29,081 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:46:29,081 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:46:29,081 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:46:29,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:46:29,082 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:46:29,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:46:29,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:46:29,083 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:46:29,193 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:46:29,195 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:46:29,413 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:46:29,414 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:46:29,507 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:46:29,507 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:46:29,507 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:46:29 BoogieIcfgContainer [2024-06-03 20:46:29,508 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:46:29,510 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:46:29,510 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:46:29,512 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:46:29,513 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:46:28" (1/4) ... [2024-06-03 20:46:29,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2c838e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:46:29, skipping insertion in model container [2024-06-03 20:46:29,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:46:28" (2/4) ... [2024-06-03 20:46:29,514 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2c838e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:46:29, skipping insertion in model container [2024-06-03 20:46:29,514 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:46:28" (3/4) ... [2024-06-03 20:46:29,515 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c2c838e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:46:29, skipping insertion in model container [2024-06-03 20:46:29,515 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:46:29" (4/4) ... [2024-06-03 20:46:29,516 INFO L112 eAbstractionObserver]: Analyzing ICFG safe018_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 20:46:29,530 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:46:29,530 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:46:29,531 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:46:29,584 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:46:29,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-03 20:46:29,646 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-03 20:46:29,646 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:46:29,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:46:29,649 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-03 20:46:29,652 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-03 20:46:29,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:46:29,670 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;@ad58b71, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:46:29,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:46:29,674 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:46:29,674 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:46:29,674 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:46:29,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:29,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:46:29,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:29,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1844258309, now seen corresponding path program 1 times [2024-06-03 20:46:29,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:29,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080479163] [2024-06-03 20:46:29,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:29,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:30,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:30,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080479163] [2024-06-03 20:46:30,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080479163] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:30,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:30,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:46:30,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666092796] [2024-06-03 20:46:30,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:30,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:46:30,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:30,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:46:30,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:46:30,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-06-03 20:46:30,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 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) [2024-06-03 20:46:30,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:30,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-06-03 20:46:30,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:30,549 INFO L124 PetriNetUnfolderBase]: 335/572 cut-off events. [2024-06-03 20:46:30,550 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2024-06-03 20:46:30,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1148 conditions, 572 events. 335/572 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2687 event pairs, 199 based on Foata normal form. 1/541 useless extension candidates. Maximal degree in co-relation 1133. Up to 529 conditions per place. [2024-06-03 20:46:30,557 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 28 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-03 20:46:30,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 161 flow [2024-06-03 20:46:30,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:46:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:46:30,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2024-06-03 20:46:30,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-06-03 20:46:30,569 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 83 transitions. [2024-06-03 20:46:30,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 161 flow [2024-06-03 20:46:30,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 156 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:30,573 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-03 20:46:30,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-03 20:46:30,577 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-03 20:46:30,577 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-03 20:46:30,577 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) [2024-06-03 20:46:30,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:30,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:30,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:46:30,578 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:30,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:30,579 INFO L85 PathProgramCache]: Analyzing trace with hash 362673149, now seen corresponding path program 1 times [2024-06-03 20:46:30,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:30,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712585596] [2024-06-03 20:46:30,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:30,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:30,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:30,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:30,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712585596] [2024-06-03 20:46:30,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712585596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:30,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:30,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:46:30,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460082857] [2024-06-03 20:46:30,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:30,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:46:30,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:30,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:46:30,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:46:30,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 20:46:30,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:30,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:30,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 20:46:30,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:31,104 INFO L124 PetriNetUnfolderBase]: 586/975 cut-off events. [2024-06-03 20:46:31,104 INFO L125 PetriNetUnfolderBase]: For 181/195 co-relation queries the response was YES. [2024-06-03 20:46:31,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2255 conditions, 975 events. 586/975 cut-off events. For 181/195 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4556 event pairs, 265 based on Foata normal form. 13/963 useless extension candidates. Maximal degree in co-relation 2240. Up to 844 conditions per place. [2024-06-03 20:46:31,112 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 36 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-06-03 20:46:31,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 220 flow [2024-06-03 20:46:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:46:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:46:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-03 20:46:31,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-03 20:46:31,116 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 101 transitions. [2024-06-03 20:46:31,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 220 flow [2024-06-03 20:46:31,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 49 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:46:31,119 INFO L231 Difference]: Finished difference. Result has 43 places, 35 transitions, 121 flow [2024-06-03 20:46:31,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=121, PETRI_PLACES=43, PETRI_TRANSITIONS=35} [2024-06-03 20:46:31,120 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2024-06-03 20:46:31,120 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 35 transitions, 121 flow [2024-06-03 20:46:31,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:31,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:31,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:31,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:46:31,124 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)] === [2024-06-03 20:46:31,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:31,125 INFO L85 PathProgramCache]: Analyzing trace with hash -281077605, now seen corresponding path program 1 times [2024-06-03 20:46:31,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:31,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304113553] [2024-06-03 20:46:31,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:31,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:31,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:31,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:31,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:31,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304113553] [2024-06-03 20:46:31,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304113553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:31,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:31,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:46:31,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949382866] [2024-06-03 20:46:31,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:31,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:46:31,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:31,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:46:31,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:46:31,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 20:46:31,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 35 transitions, 121 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:31,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:31,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 20:46:31,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:31,554 INFO L124 PetriNetUnfolderBase]: 544/913 cut-off events. [2024-06-03 20:46:31,554 INFO L125 PetriNetUnfolderBase]: For 447/447 co-relation queries the response was YES. [2024-06-03 20:46:31,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2295 conditions, 913 events. 544/913 cut-off events. For 447/447 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4407 event pairs, 229 based on Foata normal form. 2/911 useless extension candidates. Maximal degree in co-relation 2278. Up to 830 conditions per place. [2024-06-03 20:46:31,560 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 38 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-03 20:46:31,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 255 flow [2024-06-03 20:46:31,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:46:31,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:46:31,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-03 20:46:31,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-03 20:46:31,561 INFO L175 Difference]: Start difference. First operand has 43 places, 35 transitions, 121 flow. Second operand 4 states and 98 transitions. [2024-06-03 20:46:31,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 255 flow [2024-06-03 20:46:31,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 240 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 20:46:31,563 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 156 flow [2024-06-03 20:46:31,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-03 20:46:31,564 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 5 predicate places. [2024-06-03 20:46:31,564 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 156 flow [2024-06-03 20:46:31,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:31,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:31,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:31,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:46:31,565 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:31,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:31,565 INFO L85 PathProgramCache]: Analyzing trace with hash 467409274, now seen corresponding path program 1 times [2024-06-03 20:46:31,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:31,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809244217] [2024-06-03 20:46:31,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:31,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:31,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:31,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809244217] [2024-06-03 20:46:31,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809244217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:31,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:31,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:46:31,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754694240] [2024-06-03 20:46:31,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:31,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:46:31,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:31,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:46:31,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:46:31,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 20:46:31,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 156 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) [2024-06-03 20:46:31,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:31,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 20:46:31,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:31,959 INFO L124 PetriNetUnfolderBase]: 536/901 cut-off events. [2024-06-03 20:46:31,959 INFO L125 PetriNetUnfolderBase]: For 739/739 co-relation queries the response was YES. [2024-06-03 20:46:31,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2515 conditions, 901 events. 536/901 cut-off events. For 739/739 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4361 event pairs, 213 based on Foata normal form. 4/901 useless extension candidates. Maximal degree in co-relation 2496. Up to 800 conditions per place. [2024-06-03 20:46:31,965 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 43 selfloop transitions, 9 changer transitions 0/59 dead transitions. [2024-06-03 20:46:31,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 59 transitions, 308 flow [2024-06-03 20:46:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:31,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:31,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-03 20:46:31,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-03 20:46:31,966 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 156 flow. Second operand 5 states and 119 transitions. [2024-06-03 20:46:31,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 59 transitions, 308 flow [2024-06-03 20:46:31,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 308 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-06-03 20:46:31,968 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 193 flow [2024-06-03 20:46:31,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=193, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-03 20:46:31,969 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2024-06-03 20:46:31,969 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 193 flow [2024-06-03 20:46:31,970 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) [2024-06-03 20:46:31,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:31,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:31,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:46:31,970 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:31,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:31,971 INFO L85 PathProgramCache]: Analyzing trace with hash -336979322, now seen corresponding path program 1 times [2024-06-03 20:46:31,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:31,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540389210] [2024-06-03 20:46:31,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:31,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:31,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:32,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:32,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540389210] [2024-06-03 20:46:32,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540389210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:32,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:32,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:46:32,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194071401] [2024-06-03 20:46:32,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:32,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:46:32,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:32,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:46:32,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:46:32,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:32,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 193 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:32,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:32,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:32,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:32,400 INFO L124 PetriNetUnfolderBase]: 705/1173 cut-off events. [2024-06-03 20:46:32,400 INFO L125 PetriNetUnfolderBase]: For 1482/1485 co-relation queries the response was YES. [2024-06-03 20:46:32,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3476 conditions, 1173 events. 705/1173 cut-off events. For 1482/1485 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5717 event pairs, 227 based on Foata normal form. 5/1171 useless extension candidates. Maximal degree in co-relation 3454. Up to 991 conditions per place. [2024-06-03 20:46:32,407 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 44 selfloop transitions, 13 changer transitions 0/63 dead transitions. [2024-06-03 20:46:32,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 63 transitions, 377 flow [2024-06-03 20:46:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:46:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:46:32,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-03 20:46:32,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-03 20:46:32,409 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 193 flow. Second operand 4 states and 101 transitions. [2024-06-03 20:46:32,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 63 transitions, 377 flow [2024-06-03 20:46:32,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 63 transitions, 358 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:32,417 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 250 flow [2024-06-03 20:46:32,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=250, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2024-06-03 20:46:32,419 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-03 20:46:32,419 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 250 flow [2024-06-03 20:46:32,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:32,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:32,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:32,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:46:32,420 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:32,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:32,421 INFO L85 PathProgramCache]: Analyzing trace with hash -336859352, now seen corresponding path program 2 times [2024-06-03 20:46:32,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:32,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357372815] [2024-06-03 20:46:32,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:32,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:32,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:32,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:32,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357372815] [2024-06-03 20:46:32,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357372815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:32,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:32,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:46:32,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603709810] [2024-06-03 20:46:32,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:32,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:46:32,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:32,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:46:32,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:46:32,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:32,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 250 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:32,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:32,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:32,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:32,894 INFO L124 PetriNetUnfolderBase]: 700/1174 cut-off events. [2024-06-03 20:46:32,894 INFO L125 PetriNetUnfolderBase]: For 2110/2113 co-relation queries the response was YES. [2024-06-03 20:46:32,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3879 conditions, 1174 events. 700/1174 cut-off events. For 2110/2113 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5656 event pairs, 243 based on Foata normal form. 2/1169 useless extension candidates. Maximal degree in co-relation 3856. Up to 999 conditions per place. [2024-06-03 20:46:32,901 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 52 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2024-06-03 20:46:32,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 485 flow [2024-06-03 20:46:32,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:32,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-03 20:46:32,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-03 20:46:32,902 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 250 flow. Second operand 5 states and 119 transitions. [2024-06-03 20:46:32,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 485 flow [2024-06-03 20:46:32,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 444 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-03 20:46:32,907 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 334 flow [2024-06-03 20:46:32,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=334, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-06-03 20:46:32,907 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-03 20:46:32,908 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 334 flow [2024-06-03 20:46:32,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:32,908 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:32,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:32,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:46:32,908 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:32,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:32,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1776230155, now seen corresponding path program 1 times [2024-06-03 20:46:32,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:32,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452999331] [2024-06-03 20:46:32,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:32,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:32,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:33,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:33,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452999331] [2024-06-03 20:46:33,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452999331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:33,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:33,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:46:33,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732768787] [2024-06-03 20:46:33,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:33,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:46:33,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:33,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:46:33,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:46:33,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 20:46:33,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 334 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:33,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:33,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 20:46:33,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:33,303 INFO L124 PetriNetUnfolderBase]: 659/1125 cut-off events. [2024-06-03 20:46:33,303 INFO L125 PetriNetUnfolderBase]: For 2317/2317 co-relation queries the response was YES. [2024-06-03 20:46:33,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3818 conditions, 1125 events. 659/1125 cut-off events. For 2317/2317 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5542 event pairs, 229 based on Foata normal form. 1/1123 useless extension candidates. Maximal degree in co-relation 3792. Up to 977 conditions per place. [2024-06-03 20:46:33,310 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 53 selfloop transitions, 8 changer transitions 0/72 dead transitions. [2024-06-03 20:46:33,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 524 flow [2024-06-03 20:46:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:46:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:46:33,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-06-03 20:46:33,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-03 20:46:33,311 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 334 flow. Second operand 4 states and 95 transitions. [2024-06-03 20:46:33,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 524 flow [2024-06-03 20:46:33,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 502 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-06-03 20:46:33,317 INFO L231 Difference]: Finished difference. Result has 62 places, 63 transitions, 391 flow [2024-06-03 20:46:33,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=391, PETRI_PLACES=62, PETRI_TRANSITIONS=63} [2024-06-03 20:46:33,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-03 20:46:33,318 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 63 transitions, 391 flow [2024-06-03 20:46:33,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:33,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:33,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:33,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:46:33,319 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:33,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:33,319 INFO L85 PathProgramCache]: Analyzing trace with hash -33193753, now seen corresponding path program 1 times [2024-06-03 20:46:33,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:33,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631397148] [2024-06-03 20:46:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:33,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:33,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:33,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631397148] [2024-06-03 20:46:33,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631397148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:33,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:33,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:33,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270362952] [2024-06-03 20:46:33,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:33,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:33,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:33,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:33,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:33,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:33,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 391 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:33,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:33,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:33,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:33,861 INFO L124 PetriNetUnfolderBase]: 924/1541 cut-off events. [2024-06-03 20:46:33,861 INFO L125 PetriNetUnfolderBase]: For 4223/4226 co-relation queries the response was YES. [2024-06-03 20:46:33,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5665 conditions, 1541 events. 924/1541 cut-off events. For 4223/4226 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 7950 event pairs, 163 based on Foata normal form. 18/1552 useless extension candidates. Maximal degree in co-relation 5635. Up to 968 conditions per place. [2024-06-03 20:46:33,871 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 66 selfloop transitions, 29 changer transitions 0/101 dead transitions. [2024-06-03 20:46:33,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 101 transitions, 751 flow [2024-06-03 20:46:33,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:33,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 20:46:33,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-03 20:46:33,873 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 391 flow. Second operand 6 states and 151 transitions. [2024-06-03 20:46:33,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 101 transitions, 751 flow [2024-06-03 20:46:33,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 101 transitions, 747 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-03 20:46:33,880 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 528 flow [2024-06-03 20:46:33,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=528, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-03 20:46:33,881 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 28 predicate places. [2024-06-03 20:46:33,881 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 528 flow [2024-06-03 20:46:33,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:33,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:33,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:33,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:46:33,882 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:33,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:33,882 INFO L85 PathProgramCache]: Analyzing trace with hash 858517543, now seen corresponding path program 2 times [2024-06-03 20:46:33,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:33,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913149302] [2024-06-03 20:46:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:33,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:33,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:34,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:34,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:34,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913149302] [2024-06-03 20:46:34,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913149302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:34,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:34,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:34,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166202087] [2024-06-03 20:46:34,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:34,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:34,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:34,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:34,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:34,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:34,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 528 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:34,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:34,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:34,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:34,391 INFO L124 PetriNetUnfolderBase]: 868/1457 cut-off events. [2024-06-03 20:46:34,391 INFO L125 PetriNetUnfolderBase]: For 5555/5558 co-relation queries the response was YES. [2024-06-03 20:46:34,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5745 conditions, 1457 events. 868/1457 cut-off events. For 5555/5558 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7501 event pairs, 213 based on Foata normal form. 28/1478 useless extension candidates. Maximal degree in co-relation 5711. Up to 1075 conditions per place. [2024-06-03 20:46:34,401 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 62 selfloop transitions, 25 changer transitions 0/93 dead transitions. [2024-06-03 20:46:34,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 789 flow [2024-06-03 20:46:34,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-03 20:46:34,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-03 20:46:34,403 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 528 flow. Second operand 5 states and 126 transitions. [2024-06-03 20:46:34,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 789 flow [2024-06-03 20:46:34,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 744 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-03 20:46:34,411 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 562 flow [2024-06-03 20:46:34,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=562, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-06-03 20:46:34,412 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-03 20:46:34,412 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 562 flow [2024-06-03 20:46:34,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:34,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:34,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:34,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:46:34,413 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:34,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:34,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1599247001, now seen corresponding path program 3 times [2024-06-03 20:46:34,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:34,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437605949] [2024-06-03 20:46:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:34,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:34,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:34,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437605949] [2024-06-03 20:46:34,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437605949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:34,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:34,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:34,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779022475] [2024-06-03 20:46:34,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:34,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:34,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:34,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:34,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:34,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:34,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 562 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:34,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:34,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:34,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:34,870 INFO L124 PetriNetUnfolderBase]: 901/1516 cut-off events. [2024-06-03 20:46:34,871 INFO L125 PetriNetUnfolderBase]: For 5890/5893 co-relation queries the response was YES. [2024-06-03 20:46:34,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6096 conditions, 1516 events. 901/1516 cut-off events. For 5890/5893 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 7865 event pairs, 273 based on Foata normal form. 16/1525 useless extension candidates. Maximal degree in co-relation 6060. Up to 1243 conditions per place. [2024-06-03 20:46:34,901 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 74 selfloop transitions, 17 changer transitions 0/97 dead transitions. [2024-06-03 20:46:34,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 831 flow [2024-06-03 20:46:34,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:34,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:34,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 20:46:34,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-03 20:46:34,903 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 562 flow. Second operand 6 states and 141 transitions. [2024-06-03 20:46:34,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 831 flow [2024-06-03 20:46:34,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 97 transitions, 789 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:34,915 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 575 flow [2024-06-03 20:46:34,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=575, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-06-03 20:46:34,916 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-03 20:46:34,917 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 575 flow [2024-06-03 20:46:34,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:34,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:34,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:34,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:46:34,918 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:34,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:34,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1599062551, now seen corresponding path program 1 times [2024-06-03 20:46:34,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:34,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891888493] [2024-06-03 20:46:34,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:34,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:34,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:35,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:35,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891888493] [2024-06-03 20:46:35,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891888493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:35,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:35,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:35,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246019994] [2024-06-03 20:46:35,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:35,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:35,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:35,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:35,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:35,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:35,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 575 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:35,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:35,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:35,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:35,346 INFO L124 PetriNetUnfolderBase]: 881/1484 cut-off events. [2024-06-03 20:46:35,346 INFO L125 PetriNetUnfolderBase]: For 6127/6130 co-relation queries the response was YES. [2024-06-03 20:46:35,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5949 conditions, 1484 events. 881/1484 cut-off events. For 6127/6130 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 7672 event pairs, 208 based on Foata normal form. 12/1489 useless extension candidates. Maximal degree in co-relation 5912. Up to 1004 conditions per place. [2024-06-03 20:46:35,365 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 74 selfloop transitions, 20 changer transitions 0/100 dead transitions. [2024-06-03 20:46:35,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 836 flow [2024-06-03 20:46:35,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 20:46:35,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-03 20:46:35,367 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 575 flow. Second operand 6 states and 143 transitions. [2024-06-03 20:46:35,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 836 flow [2024-06-03 20:46:35,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 100 transitions, 797 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:35,418 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 562 flow [2024-06-03 20:46:35,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=518, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=562, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-06-03 20:46:35,419 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-03 20:46:35,419 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 562 flow [2024-06-03 20:46:35,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:35,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:35,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:35,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:46:35,419 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:35,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:35,420 INFO L85 PathProgramCache]: Analyzing trace with hash -776207771, now seen corresponding path program 1 times [2024-06-03 20:46:35,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:35,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044599834] [2024-06-03 20:46:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:35,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:35,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:35,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044599834] [2024-06-03 20:46:35,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044599834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:35,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:35,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:46:35,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217632344] [2024-06-03 20:46:35,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:35,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:46:35,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:35,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:46:35,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:46:35,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 20:46:35,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 562 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:35,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:35,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 20:46:35,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:35,821 INFO L124 PetriNetUnfolderBase]: 812/1418 cut-off events. [2024-06-03 20:46:35,821 INFO L125 PetriNetUnfolderBase]: For 6296/6296 co-relation queries the response was YES. [2024-06-03 20:46:35,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5743 conditions, 1418 events. 812/1418 cut-off events. For 6296/6296 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7544 event pairs, 244 based on Foata normal form. 2/1415 useless extension candidates. Maximal degree in co-relation 5705. Up to 1249 conditions per place. [2024-06-03 20:46:35,851 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 64 selfloop transitions, 18 changer transitions 0/91 dead transitions. [2024-06-03 20:46:35,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 91 transitions, 824 flow [2024-06-03 20:46:35,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:35,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:35,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-03 20:46:35,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-03 20:46:35,853 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 562 flow. Second operand 5 states and 116 transitions. [2024-06-03 20:46:35,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 91 transitions, 824 flow [2024-06-03 20:46:35,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 91 transitions, 773 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:35,863 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 654 flow [2024-06-03 20:46:35,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=654, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-06-03 20:46:35,864 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-03 20:46:35,864 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 654 flow [2024-06-03 20:46:35,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:35,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:35,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:35,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:46:35,865 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:35,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:35,865 INFO L85 PathProgramCache]: Analyzing trace with hash -974158742, now seen corresponding path program 1 times [2024-06-03 20:46:35,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:35,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389726197] [2024-06-03 20:46:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:35,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:36,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:36,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389726197] [2024-06-03 20:46:36,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389726197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:36,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:36,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:36,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966081177] [2024-06-03 20:46:36,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:36,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:36,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:36,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:36,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:36,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 20:46:36,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 654 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:36,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:36,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 20:46:36,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:36,417 INFO L124 PetriNetUnfolderBase]: 833/1432 cut-off events. [2024-06-03 20:46:36,417 INFO L125 PetriNetUnfolderBase]: For 6910/6910 co-relation queries the response was YES. [2024-06-03 20:46:36,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5867 conditions, 1432 events. 833/1432 cut-off events. For 6910/6910 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7648 event pairs, 249 based on Foata normal form. 2/1418 useless extension candidates. Maximal degree in co-relation 5827. Up to 1239 conditions per place. [2024-06-03 20:46:36,427 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 58 selfloop transitions, 18 changer transitions 0/90 dead transitions. [2024-06-03 20:46:36,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 90 transitions, 846 flow [2024-06-03 20:46:36,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:46:36,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:46:36,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-03 20:46:36,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 20:46:36,429 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 654 flow. Second operand 4 states and 96 transitions. [2024-06-03 20:46:36,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 90 transitions, 846 flow [2024-06-03 20:46:36,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 90 transitions, 816 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-06-03 20:46:36,441 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 697 flow [2024-06-03 20:46:36,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=697, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2024-06-03 20:46:36,442 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 42 predicate places. [2024-06-03 20:46:36,442 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 697 flow [2024-06-03 20:46:36,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:36,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:36,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:36,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:46:36,442 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:36,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:36,443 INFO L85 PathProgramCache]: Analyzing trace with hash -973772792, now seen corresponding path program 2 times [2024-06-03 20:46:36,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:36,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144069789] [2024-06-03 20:46:36,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:36,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:36,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:36,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:36,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144069789] [2024-06-03 20:46:36,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144069789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:36,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:36,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:36,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050136751] [2024-06-03 20:46:36,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:36,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:36,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:36,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:36,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:36,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 20:46:36,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 697 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:36,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:36,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 20:46:36,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:36,954 INFO L124 PetriNetUnfolderBase]: 832/1428 cut-off events. [2024-06-03 20:46:36,955 INFO L125 PetriNetUnfolderBase]: For 7800/7800 co-relation queries the response was YES. [2024-06-03 20:46:36,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6141 conditions, 1428 events. 832/1428 cut-off events. For 7800/7800 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7485 event pairs, 237 based on Foata normal form. 2/1420 useless extension candidates. Maximal degree in co-relation 6098. Up to 1229 conditions per place. [2024-06-03 20:46:36,964 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 67 selfloop transitions, 22 changer transitions 0/103 dead transitions. [2024-06-03 20:46:36,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 103 transitions, 950 flow [2024-06-03 20:46:36,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:36,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-03 20:46:36,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2024-06-03 20:46:36,966 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 697 flow. Second operand 7 states and 155 transitions. [2024-06-03 20:46:36,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 103 transitions, 950 flow [2024-06-03 20:46:36,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 103 transitions, 905 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-03 20:46:36,982 INFO L231 Difference]: Finished difference. Result has 88 places, 85 transitions, 734 flow [2024-06-03 20:46:36,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=734, PETRI_PLACES=88, PETRI_TRANSITIONS=85} [2024-06-03 20:46:36,983 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-06-03 20:46:36,983 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 85 transitions, 734 flow [2024-06-03 20:46:36,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:36,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:36,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:36,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:46:36,984 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)] === [2024-06-03 20:46:36,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1707363660, now seen corresponding path program 1 times [2024-06-03 20:46:36,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:36,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147069632] [2024-06-03 20:46:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:36,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:37,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:37,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147069632] [2024-06-03 20:46:37,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147069632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:37,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:37,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:46:37,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213823259] [2024-06-03 20:46:37,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:37,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:46:37,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:37,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:46:37,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:46:37,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:37,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 85 transitions, 734 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:37,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:37,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:37,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:37,393 INFO L124 PetriNetUnfolderBase]: 884/1494 cut-off events. [2024-06-03 20:46:37,393 INFO L125 PetriNetUnfolderBase]: For 8334/8334 co-relation queries the response was YES. [2024-06-03 20:46:37,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6561 conditions, 1494 events. 884/1494 cut-off events. For 8334/8334 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7703 event pairs, 242 based on Foata normal form. 1/1492 useless extension candidates. Maximal degree in co-relation 6517. Up to 1349 conditions per place. [2024-06-03 20:46:37,403 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 88 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2024-06-03 20:46:37,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 113 transitions, 1117 flow [2024-06-03 20:46:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:37,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-03 20:46:37,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-03 20:46:37,404 INFO L175 Difference]: Start difference. First operand has 88 places, 85 transitions, 734 flow. Second operand 6 states and 132 transitions. [2024-06-03 20:46:37,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 113 transitions, 1117 flow [2024-06-03 20:46:37,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 113 transitions, 1037 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:46:37,420 INFO L231 Difference]: Finished difference. Result has 89 places, 97 transitions, 823 flow [2024-06-03 20:46:37,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=823, PETRI_PLACES=89, PETRI_TRANSITIONS=97} [2024-06-03 20:46:37,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-03 20:46:37,422 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 97 transitions, 823 flow [2024-06-03 20:46:37,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:37,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:37,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:37,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:46:37,422 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:37,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:37,423 INFO L85 PathProgramCache]: Analyzing trace with hash -973766840, now seen corresponding path program 2 times [2024-06-03 20:46:37,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:37,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638175785] [2024-06-03 20:46:37,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:37,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:37,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:37,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638175785] [2024-06-03 20:46:37,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638175785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:37,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:37,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:46:37,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217538233] [2024-06-03 20:46:37,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:37,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:46:37,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:37,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:46:37,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:46:37,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:37,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 97 transitions, 823 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:37,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:37,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:37,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:37,879 INFO L124 PetriNetUnfolderBase]: 889/1503 cut-off events. [2024-06-03 20:46:37,879 INFO L125 PetriNetUnfolderBase]: For 9460/9460 co-relation queries the response was YES. [2024-06-03 20:46:37,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6841 conditions, 1503 events. 889/1503 cut-off events. For 9460/9460 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7766 event pairs, 241 based on Foata normal form. 1/1501 useless extension candidates. Maximal degree in co-relation 6797. Up to 1361 conditions per place. [2024-06-03 20:46:37,889 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 93 selfloop transitions, 19 changer transitions 0/118 dead transitions. [2024-06-03 20:46:37,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 118 transitions, 1158 flow [2024-06-03 20:46:37,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:37,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:37,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-03 20:46:37,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-03 20:46:37,890 INFO L175 Difference]: Start difference. First operand has 89 places, 97 transitions, 823 flow. Second operand 7 states and 147 transitions. [2024-06-03 20:46:37,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 118 transitions, 1158 flow [2024-06-03 20:46:37,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 118 transitions, 1122 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 20:46:37,911 INFO L231 Difference]: Finished difference. Result has 95 places, 102 transitions, 882 flow [2024-06-03 20:46:37,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=882, PETRI_PLACES=95, PETRI_TRANSITIONS=102} [2024-06-03 20:46:37,911 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2024-06-03 20:46:37,911 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 102 transitions, 882 flow [2024-06-03 20:46:37,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:37,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:37,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:37,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:46:37,912 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:37,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:37,912 INFO L85 PathProgramCache]: Analyzing trace with hash -973974230, now seen corresponding path program 3 times [2024-06-03 20:46:37,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:37,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743506861] [2024-06-03 20:46:37,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:37,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:38,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:38,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743506861] [2024-06-03 20:46:38,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743506861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:38,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:38,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:46:38,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522819523] [2024-06-03 20:46:38,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:38,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:46:38,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:38,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:46:38,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:46:38,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:38,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 102 transitions, 882 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:38,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:38,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:38,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:38,314 INFO L124 PetriNetUnfolderBase]: 886/1499 cut-off events. [2024-06-03 20:46:38,314 INFO L125 PetriNetUnfolderBase]: For 10306/10306 co-relation queries the response was YES. [2024-06-03 20:46:38,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6862 conditions, 1499 events. 886/1499 cut-off events. For 10306/10306 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7773 event pairs, 242 based on Foata normal form. 1/1497 useless extension candidates. Maximal degree in co-relation 6816. Up to 1358 conditions per place. [2024-06-03 20:46:38,325 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 91 selfloop transitions, 18 changer transitions 0/115 dead transitions. [2024-06-03 20:46:38,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 115 transitions, 1137 flow [2024-06-03 20:46:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:38,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:38,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-03 20:46:38,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-06-03 20:46:38,326 INFO L175 Difference]: Start difference. First operand has 95 places, 102 transitions, 882 flow. Second operand 5 states and 114 transitions. [2024-06-03 20:46:38,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 115 transitions, 1137 flow [2024-06-03 20:46:38,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 115 transitions, 1081 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:38,350 INFO L231 Difference]: Finished difference. Result has 96 places, 102 transitions, 868 flow [2024-06-03 20:46:38,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=868, PETRI_PLACES=96, PETRI_TRANSITIONS=102} [2024-06-03 20:46:38,351 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 55 predicate places. [2024-06-03 20:46:38,351 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 102 transitions, 868 flow [2024-06-03 20:46:38,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:38,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:38,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:38,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:46:38,352 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:38,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:38,352 INFO L85 PathProgramCache]: Analyzing trace with hash -973758904, now seen corresponding path program 1 times [2024-06-03 20:46:38,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:38,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443805467] [2024-06-03 20:46:38,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:38,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:38,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:38,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:38,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443805467] [2024-06-03 20:46:38,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443805467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:38,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:38,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:46:38,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440419499] [2024-06-03 20:46:38,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:38,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:46:38,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:38,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:46:38,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:46:38,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 20:46:38,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 102 transitions, 868 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) [2024-06-03 20:46:38,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:38,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 20:46:38,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:38,754 INFO L124 PetriNetUnfolderBase]: 834/1435 cut-off events. [2024-06-03 20:46:38,754 INFO L125 PetriNetUnfolderBase]: For 10795/10795 co-relation queries the response was YES. [2024-06-03 20:46:38,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6573 conditions, 1435 events. 834/1435 cut-off events. For 10795/10795 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 7508 event pairs, 235 based on Foata normal form. 2/1427 useless extension candidates. Maximal degree in co-relation 6526. Up to 1258 conditions per place. [2024-06-03 20:46:38,764 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 91 selfloop transitions, 10 changer transitions 0/115 dead transitions. [2024-06-03 20:46:38,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 115 transitions, 1115 flow [2024-06-03 20:46:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 112 transitions. [2024-06-03 20:46:38,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-03 20:46:38,765 INFO L175 Difference]: Start difference. First operand has 96 places, 102 transitions, 868 flow. Second operand 5 states and 112 transitions. [2024-06-03 20:46:38,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 115 transitions, 1115 flow [2024-06-03 20:46:38,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 115 transitions, 1079 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:38,787 INFO L231 Difference]: Finished difference. Result has 97 places, 104 transitions, 875 flow [2024-06-03 20:46:38,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=875, PETRI_PLACES=97, PETRI_TRANSITIONS=104} [2024-06-03 20:46:38,788 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-03 20:46:38,788 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 104 transitions, 875 flow [2024-06-03 20:46:38,788 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) [2024-06-03 20:46:38,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:38,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:38,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:46:38,788 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:38,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:38,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1385804804, now seen corresponding path program 1 times [2024-06-03 20:46:38,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:38,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345556] [2024-06-03 20:46:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:38,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:39,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:39,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345556] [2024-06-03 20:46:39,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:39,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:39,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:46:39,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025368892] [2024-06-03 20:46:39,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:39,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:46:39,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:39,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:46:39,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:46:39,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 20:46:39,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 104 transitions, 875 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) [2024-06-03 20:46:39,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:39,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 20:46:39,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:39,280 INFO L124 PetriNetUnfolderBase]: 861/1471 cut-off events. [2024-06-03 20:46:39,281 INFO L125 PetriNetUnfolderBase]: For 12540/12540 co-relation queries the response was YES. [2024-06-03 20:46:39,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6886 conditions, 1471 events. 861/1471 cut-off events. For 12540/12540 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7706 event pairs, 199 based on Foata normal form. 4/1470 useless extension candidates. Maximal degree in co-relation 6838. Up to 1194 conditions per place. [2024-06-03 20:46:39,292 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 83 selfloop transitions, 30 changer transitions 0/128 dead transitions. [2024-06-03 20:46:39,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 128 transitions, 1238 flow [2024-06-03 20:46:39,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:39,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:39,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-03 20:46:39,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-03 20:46:39,293 INFO L175 Difference]: Start difference. First operand has 97 places, 104 transitions, 875 flow. Second operand 6 states and 139 transitions. [2024-06-03 20:46:39,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 128 transitions, 1238 flow [2024-06-03 20:46:39,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 128 transitions, 1211 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:39,318 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 990 flow [2024-06-03 20:46:39,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=848, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=990, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2024-06-03 20:46:39,318 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-03 20:46:39,318 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 990 flow [2024-06-03 20:46:39,318 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) [2024-06-03 20:46:39,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:39,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:39,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:46:39,319 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:39,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:39,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1388661764, now seen corresponding path program 2 times [2024-06-03 20:46:39,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:39,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109287291] [2024-06-03 20:46:39,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:39,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:39,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:39,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109287291] [2024-06-03 20:46:39,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109287291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:39,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:39,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:46:39,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374011630] [2024-06-03 20:46:39,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:39,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:46:39,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:39,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:46:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:46:39,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 20:46:39,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 990 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) [2024-06-03 20:46:39,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:39,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 20:46:39,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:39,774 INFO L124 PetriNetUnfolderBase]: 851/1457 cut-off events. [2024-06-03 20:46:39,774 INFO L125 PetriNetUnfolderBase]: For 13827/13827 co-relation queries the response was YES. [2024-06-03 20:46:39,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7040 conditions, 1457 events. 851/1457 cut-off events. For 13827/13827 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7618 event pairs, 234 based on Foata normal form. 4/1456 useless extension candidates. Maximal degree in co-relation 6990. Up to 1252 conditions per place. [2024-06-03 20:46:39,784 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 82 selfloop transitions, 26 changer transitions 0/123 dead transitions. [2024-06-03 20:46:39,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 123 transitions, 1240 flow [2024-06-03 20:46:39,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:39,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-03 20:46:39,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-03 20:46:39,786 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 990 flow. Second operand 6 states and 134 transitions. [2024-06-03 20:46:39,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 123 transitions, 1240 flow [2024-06-03 20:46:39,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 123 transitions, 1154 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:39,816 INFO L231 Difference]: Finished difference. Result has 104 places, 109 transitions, 962 flow [2024-06-03 20:46:39,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=962, PETRI_PLACES=104, PETRI_TRANSITIONS=109} [2024-06-03 20:46:39,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 63 predicate places. [2024-06-03 20:46:39,816 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 109 transitions, 962 flow [2024-06-03 20:46:39,816 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) [2024-06-03 20:46:39,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:39,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:39,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:46:39,817 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:39,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:39,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1233596212, now seen corresponding path program 1 times [2024-06-03 20:46:39,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:39,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379064499] [2024-06-03 20:46:39,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:39,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:39,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:40,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:40,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379064499] [2024-06-03 20:46:40,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379064499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:40,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:40,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:40,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116385540] [2024-06-03 20:46:40,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:40,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:40,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:40,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:40,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:40,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:40,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 109 transitions, 962 flow. Second operand has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:40,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:40,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:40,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:40,295 INFO L124 PetriNetUnfolderBase]: 892/1508 cut-off events. [2024-06-03 20:46:40,295 INFO L125 PetriNetUnfolderBase]: For 14438/14441 co-relation queries the response was YES. [2024-06-03 20:46:40,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7223 conditions, 1508 events. 892/1508 cut-off events. For 14438/14441 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 7790 event pairs, 251 based on Foata normal form. 1/1502 useless extension candidates. Maximal degree in co-relation 7172. Up to 1295 conditions per place. [2024-06-03 20:46:40,306 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 82 selfloop transitions, 36 changer transitions 0/124 dead transitions. [2024-06-03 20:46:40,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 124 transitions, 1264 flow [2024-06-03 20:46:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:40,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-03 20:46:40,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-03 20:46:40,307 INFO L175 Difference]: Start difference. First operand has 104 places, 109 transitions, 962 flow. Second operand 5 states and 118 transitions. [2024-06-03 20:46:40,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 124 transitions, 1264 flow [2024-06-03 20:46:40,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 124 transitions, 1210 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:40,339 INFO L231 Difference]: Finished difference. Result has 105 places, 112 transitions, 1035 flow [2024-06-03 20:46:40,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=908, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1035, PETRI_PLACES=105, PETRI_TRANSITIONS=112} [2024-06-03 20:46:40,339 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-03 20:46:40,339 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 112 transitions, 1035 flow [2024-06-03 20:46:40,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.0) internal successors, (120), 8 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:40,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:40,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:40,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:46:40,340 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:40,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1409244300, now seen corresponding path program 2 times [2024-06-03 20:46:40,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:40,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384331427] [2024-06-03 20:46:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:40,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:40,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:40,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:40,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384331427] [2024-06-03 20:46:40,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384331427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:40,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:40,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:40,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962737041] [2024-06-03 20:46:40,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:40,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:40,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:40,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:40,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:40,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:40,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 112 transitions, 1035 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:40,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:40,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:40,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:40,793 INFO L124 PetriNetUnfolderBase]: 897/1525 cut-off events. [2024-06-03 20:46:40,793 INFO L125 PetriNetUnfolderBase]: For 16384/16387 co-relation queries the response was YES. [2024-06-03 20:46:40,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7564 conditions, 1525 events. 897/1525 cut-off events. For 16384/16387 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7957 event pairs, 251 based on Foata normal form. 1/1519 useless extension candidates. Maximal degree in co-relation 7512. Up to 1284 conditions per place. [2024-06-03 20:46:40,803 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 87 selfloop transitions, 42 changer transitions 0/135 dead transitions. [2024-06-03 20:46:40,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 135 transitions, 1457 flow [2024-06-03 20:46:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:40,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-03 20:46:40,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-03 20:46:40,804 INFO L175 Difference]: Start difference. First operand has 105 places, 112 transitions, 1035 flow. Second operand 6 states and 138 transitions. [2024-06-03 20:46:40,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 135 transitions, 1457 flow [2024-06-03 20:46:40,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 135 transitions, 1358 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:40,834 INFO L231 Difference]: Finished difference. Result has 108 places, 118 transitions, 1118 flow [2024-06-03 20:46:40,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=946, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1118, PETRI_PLACES=108, PETRI_TRANSITIONS=118} [2024-06-03 20:46:40,834 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-03 20:46:40,834 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 118 transitions, 1118 flow [2024-06-03 20:46:40,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:40,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:40,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:40,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:46:40,835 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:40,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:40,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1408975530, now seen corresponding path program 3 times [2024-06-03 20:46:40,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:40,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066414596] [2024-06-03 20:46:40,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:40,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:41,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:41,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066414596] [2024-06-03 20:46:41,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066414596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:41,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:41,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:41,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586964344] [2024-06-03 20:46:41,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:41,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:41,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:41,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:41,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:41,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:41,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 118 transitions, 1118 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:41,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:41,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:41,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:41,258 INFO L124 PetriNetUnfolderBase]: 902/1534 cut-off events. [2024-06-03 20:46:41,258 INFO L125 PetriNetUnfolderBase]: For 17032/17035 co-relation queries the response was YES. [2024-06-03 20:46:41,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7693 conditions, 1534 events. 902/1534 cut-off events. For 17032/17035 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8027 event pairs, 251 based on Foata normal form. 1/1528 useless extension candidates. Maximal degree in co-relation 7640. Up to 1290 conditions per place. [2024-06-03 20:46:41,269 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 83 selfloop transitions, 46 changer transitions 0/135 dead transitions. [2024-06-03 20:46:41,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 1492 flow [2024-06-03 20:46:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:41,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-03 20:46:41,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-03 20:46:41,270 INFO L175 Difference]: Start difference. First operand has 108 places, 118 transitions, 1118 flow. Second operand 6 states and 136 transitions. [2024-06-03 20:46:41,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 1492 flow [2024-06-03 20:46:41,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 135 transitions, 1409 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-03 20:46:41,302 INFO L231 Difference]: Finished difference. Result has 112 places, 121 transitions, 1177 flow [2024-06-03 20:46:41,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1041, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1177, PETRI_PLACES=112, PETRI_TRANSITIONS=121} [2024-06-03 20:46:41,303 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-03 20:46:41,303 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 121 transitions, 1177 flow [2024-06-03 20:46:41,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:41,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:41,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:41,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:46:41,303 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:41,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:41,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1408975189, now seen corresponding path program 1 times [2024-06-03 20:46:41,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:41,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117778989] [2024-06-03 20:46:41,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:41,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:41,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:41,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117778989] [2024-06-03 20:46:41,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117778989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:41,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:41,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:41,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071184831] [2024-06-03 20:46:41,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:41,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:41,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:41,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:41,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:41,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:41,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 121 transitions, 1177 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:41,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:41,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:41,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:41,745 INFO L124 PetriNetUnfolderBase]: 915/1557 cut-off events. [2024-06-03 20:46:41,745 INFO L125 PetriNetUnfolderBase]: For 18449/18455 co-relation queries the response was YES. [2024-06-03 20:46:41,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7948 conditions, 1557 events. 915/1557 cut-off events. For 18449/18455 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8216 event pairs, 242 based on Foata normal form. 5/1557 useless extension candidates. Maximal degree in co-relation 7893. Up to 1338 conditions per place. [2024-06-03 20:46:41,757 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 95 selfloop transitions, 45 changer transitions 0/146 dead transitions. [2024-06-03 20:46:41,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 146 transitions, 1619 flow [2024-06-03 20:46:41,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:46:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:46:41,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 20:46:41,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-03 20:46:41,760 INFO L175 Difference]: Start difference. First operand has 112 places, 121 transitions, 1177 flow. Second operand 8 states and 170 transitions. [2024-06-03 20:46:41,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 146 transitions, 1619 flow [2024-06-03 20:46:41,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 146 transitions, 1531 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:41,798 INFO L231 Difference]: Finished difference. Result has 118 places, 130 transitions, 1291 flow [2024-06-03 20:46:41,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1291, PETRI_PLACES=118, PETRI_TRANSITIONS=130} [2024-06-03 20:46:41,799 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-03 20:46:41,799 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 130 transitions, 1291 flow [2024-06-03 20:46:41,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:41,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:41,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:41,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:46:41,799 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:41,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:41,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1548082083, now seen corresponding path program 2 times [2024-06-03 20:46:41,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:41,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906269454] [2024-06-03 20:46:41,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:41,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:42,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:42,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:42,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906269454] [2024-06-03 20:46:42,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906269454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:42,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:42,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:42,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435997610] [2024-06-03 20:46:42,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:42,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:42,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:42,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:42,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:42,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:42,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 130 transitions, 1291 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:42,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:42,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:42,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:42,306 INFO L124 PetriNetUnfolderBase]: 957/1621 cut-off events. [2024-06-03 20:46:42,306 INFO L125 PetriNetUnfolderBase]: For 21835/21838 co-relation queries the response was YES. [2024-06-03 20:46:42,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8707 conditions, 1621 events. 957/1621 cut-off events. For 21835/21838 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8568 event pairs, 250 based on Foata normal form. 2/1616 useless extension candidates. Maximal degree in co-relation 8650. Up to 1373 conditions per place. [2024-06-03 20:46:42,318 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 102 selfloop transitions, 55 changer transitions 0/163 dead transitions. [2024-06-03 20:46:42,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 163 transitions, 1951 flow [2024-06-03 20:46:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 20:46:42,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-03 20:46:42,319 INFO L175 Difference]: Start difference. First operand has 118 places, 130 transitions, 1291 flow. Second operand 7 states and 157 transitions. [2024-06-03 20:46:42,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 163 transitions, 1951 flow [2024-06-03 20:46:42,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 163 transitions, 1850 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:42,355 INFO L231 Difference]: Finished difference. Result has 122 places, 148 transitions, 1631 flow [2024-06-03 20:46:42,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1631, PETRI_PLACES=122, PETRI_TRANSITIONS=148} [2024-06-03 20:46:42,355 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-03 20:46:42,355 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 148 transitions, 1631 flow [2024-06-03 20:46:42,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:42,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:42,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:42,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:46:42,356 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:42,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:42,356 INFO L85 PathProgramCache]: Analyzing trace with hash 204654217, now seen corresponding path program 3 times [2024-06-03 20:46:42,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:42,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490107736] [2024-06-03 20:46:42,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:42,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:42,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:42,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490107736] [2024-06-03 20:46:42,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490107736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:42,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:42,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403609191] [2024-06-03 20:46:42,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:42,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:42,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:42,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:42,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:42,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:42,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 148 transitions, 1631 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:42,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:42,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:42,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:42,866 INFO L124 PetriNetUnfolderBase]: 951/1613 cut-off events. [2024-06-03 20:46:42,866 INFO L125 PetriNetUnfolderBase]: For 22641/22644 co-relation queries the response was YES. [2024-06-03 20:46:42,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8981 conditions, 1613 events. 951/1613 cut-off events. For 22641/22644 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8509 event pairs, 250 based on Foata normal form. 2/1608 useless extension candidates. Maximal degree in co-relation 8922. Up to 1367 conditions per place. [2024-06-03 20:46:42,879 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 100 selfloop transitions, 55 changer transitions 0/161 dead transitions. [2024-06-03 20:46:42,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 161 transitions, 1973 flow [2024-06-03 20:46:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:42,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-03 20:46:42,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-03 20:46:42,880 INFO L175 Difference]: Start difference. First operand has 122 places, 148 transitions, 1631 flow. Second operand 6 states and 138 transitions. [2024-06-03 20:46:42,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 161 transitions, 1973 flow [2024-06-03 20:46:42,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 161 transitions, 1832 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:42,922 INFO L231 Difference]: Finished difference. Result has 124 places, 148 transitions, 1614 flow [2024-06-03 20:46:42,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1490, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1614, PETRI_PLACES=124, PETRI_TRANSITIONS=148} [2024-06-03 20:46:42,923 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 83 predicate places. [2024-06-03 20:46:42,923 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 148 transitions, 1614 flow [2024-06-03 20:46:42,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:42,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:42,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:42,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:46:42,924 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:42,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash 204653876, now seen corresponding path program 4 times [2024-06-03 20:46:42,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:42,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746709888] [2024-06-03 20:46:42,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:42,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:42,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:43,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:43,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746709888] [2024-06-03 20:46:43,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746709888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:43,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:43,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:43,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019837296] [2024-06-03 20:46:43,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:43,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:43,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:43,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:43,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:43,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:43,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 148 transitions, 1614 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:43,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:43,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:43,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:43,394 INFO L124 PetriNetUnfolderBase]: 948/1609 cut-off events. [2024-06-03 20:46:43,394 INFO L125 PetriNetUnfolderBase]: For 21937/21940 co-relation queries the response was YES. [2024-06-03 20:46:43,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8981 conditions, 1609 events. 948/1609 cut-off events. For 21937/21940 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 8513 event pairs, 250 based on Foata normal form. 1/1603 useless extension candidates. Maximal degree in co-relation 8921. Up to 1361 conditions per place. [2024-06-03 20:46:43,405 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 117 selfloop transitions, 40 changer transitions 0/163 dead transitions. [2024-06-03 20:46:43,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 163 transitions, 1966 flow [2024-06-03 20:46:43,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:43,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:43,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-03 20:46:43,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 20:46:43,406 INFO L175 Difference]: Start difference. First operand has 124 places, 148 transitions, 1614 flow. Second operand 5 states and 120 transitions. [2024-06-03 20:46:43,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 163 transitions, 1966 flow [2024-06-03 20:46:43,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 163 transitions, 1828 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 20:46:43,443 INFO L231 Difference]: Finished difference. Result has 123 places, 148 transitions, 1568 flow [2024-06-03 20:46:43,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1476, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1568, PETRI_PLACES=123, PETRI_TRANSITIONS=148} [2024-06-03 20:46:43,444 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-03 20:46:43,444 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 148 transitions, 1568 flow [2024-06-03 20:46:43,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:43,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:43,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:43,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:46:43,444 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:43,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:43,445 INFO L85 PathProgramCache]: Analyzing trace with hash 204869543, now seen corresponding path program 1 times [2024-06-03 20:46:43,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:43,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027348164] [2024-06-03 20:46:43,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:43,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:43,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:43,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027348164] [2024-06-03 20:46:43,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027348164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:43,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:43,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:43,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013506226] [2024-06-03 20:46:43,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:43,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:43,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:43,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:43,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:43,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 20:46:43,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 148 transitions, 1568 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) [2024-06-03 20:46:43,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:43,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 20:46:43,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:43,939 INFO L124 PetriNetUnfolderBase]: 929/1587 cut-off events. [2024-06-03 20:46:43,939 INFO L125 PetriNetUnfolderBase]: For 24079/24087 co-relation queries the response was YES. [2024-06-03 20:46:43,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8810 conditions, 1587 events. 929/1587 cut-off events. For 24079/24087 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8511 event pairs, 243 based on Foata normal form. 10/1579 useless extension candidates. Maximal degree in co-relation 8750. Up to 1308 conditions per place. [2024-06-03 20:46:43,951 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 116 selfloop transitions, 23 changer transitions 0/162 dead transitions. [2024-06-03 20:46:43,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 162 transitions, 1914 flow [2024-06-03 20:46:43,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:43,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-03 20:46:43,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.585 [2024-06-03 20:46:43,952 INFO L175 Difference]: Start difference. First operand has 123 places, 148 transitions, 1568 flow. Second operand 5 states and 117 transitions. [2024-06-03 20:46:43,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 162 transitions, 1914 flow [2024-06-03 20:46:43,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 162 transitions, 1800 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:46:43,985 INFO L231 Difference]: Finished difference. Result has 123 places, 149 transitions, 1523 flow [2024-06-03 20:46:43,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1523, PETRI_PLACES=123, PETRI_TRANSITIONS=149} [2024-06-03 20:46:43,986 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 82 predicate places. [2024-06-03 20:46:43,986 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 149 transitions, 1523 flow [2024-06-03 20:46:43,986 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) [2024-06-03 20:46:43,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:43,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:43,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:46:43,987 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:43,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:43,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2074848401, now seen corresponding path program 4 times [2024-06-03 20:46:43,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:43,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962686978] [2024-06-03 20:46:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:43,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:44,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:44,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:44,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962686978] [2024-06-03 20:46:44,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962686978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:44,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:44,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:44,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294548730] [2024-06-03 20:46:44,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:44,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:44,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:44,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:44,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:44,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:44,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 149 transitions, 1523 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:44,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:44,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:44,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:44,465 INFO L124 PetriNetUnfolderBase]: 989/1677 cut-off events. [2024-06-03 20:46:44,465 INFO L125 PetriNetUnfolderBase]: For 23249/23249 co-relation queries the response was YES. [2024-06-03 20:46:44,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9351 conditions, 1677 events. 989/1677 cut-off events. For 23249/23249 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 8926 event pairs, 241 based on Foata normal form. 1/1675 useless extension candidates. Maximal degree in co-relation 9290. Up to 1423 conditions per place. [2024-06-03 20:46:44,478 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 117 selfloop transitions, 64 changer transitions 0/187 dead transitions. [2024-06-03 20:46:44,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 187 transitions, 2110 flow [2024-06-03 20:46:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:46:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:46:44,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-03 20:46:44,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-03 20:46:44,480 INFO L175 Difference]: Start difference. First operand has 123 places, 149 transitions, 1523 flow. Second operand 11 states and 230 transitions. [2024-06-03 20:46:44,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 187 transitions, 2110 flow [2024-06-03 20:46:44,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 187 transitions, 2069 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:44,522 INFO L231 Difference]: Finished difference. Result has 132 places, 158 transitions, 1744 flow [2024-06-03 20:46:44,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1744, PETRI_PLACES=132, PETRI_TRANSITIONS=158} [2024-06-03 20:46:44,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2024-06-03 20:46:44,523 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 158 transitions, 1744 flow [2024-06-03 20:46:44,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:44,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:44,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:44,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:46:44,524 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:44,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:44,524 INFO L85 PathProgramCache]: Analyzing trace with hash 313261803, now seen corresponding path program 5 times [2024-06-03 20:46:44,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:44,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413789698] [2024-06-03 20:46:44,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:44,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:44,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:44,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413789698] [2024-06-03 20:46:44,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413789698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:44,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:44,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:44,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858811115] [2024-06-03 20:46:44,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:44,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:44,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:44,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:44,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:44,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:44,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 158 transitions, 1744 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:44,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:44,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:44,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:45,093 INFO L124 PetriNetUnfolderBase]: 986/1670 cut-off events. [2024-06-03 20:46:45,093 INFO L125 PetriNetUnfolderBase]: For 25624/25627 co-relation queries the response was YES. [2024-06-03 20:46:45,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9648 conditions, 1670 events. 986/1670 cut-off events. For 25624/25627 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8856 event pairs, 254 based on Foata normal form. 1/1664 useless extension candidates. Maximal degree in co-relation 9585. Up to 1427 conditions per place. [2024-06-03 20:46:45,106 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 46 changer transitions 0/170 dead transitions. [2024-06-03 20:46:45,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 170 transitions, 2102 flow [2024-06-03 20:46:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:46:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:46:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 118 transitions. [2024-06-03 20:46:45,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-03 20:46:45,107 INFO L175 Difference]: Start difference. First operand has 132 places, 158 transitions, 1744 flow. Second operand 5 states and 118 transitions. [2024-06-03 20:46:45,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 170 transitions, 2102 flow [2024-06-03 20:46:45,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 170 transitions, 1947 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-03 20:46:45,159 INFO L231 Difference]: Finished difference. Result has 129 places, 158 transitions, 1699 flow [2024-06-03 20:46:45,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1699, PETRI_PLACES=129, PETRI_TRANSITIONS=158} [2024-06-03 20:46:45,159 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 88 predicate places. [2024-06-03 20:46:45,159 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 158 transitions, 1699 flow [2024-06-03 20:46:45,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:45,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:45,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:45,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:46:45,160 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)] === [2024-06-03 20:46:45,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:45,160 INFO L85 PathProgramCache]: Analyzing trace with hash 147062433, now seen corresponding path program 6 times [2024-06-03 20:46:45,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:45,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347497365] [2024-06-03 20:46:45,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:45,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:45,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:45,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347497365] [2024-06-03 20:46:45,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347497365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:45,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:45,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:45,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495317421] [2024-06-03 20:46:45,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:45,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:45,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:45,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:45,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:45,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:45,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 158 transitions, 1699 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:45,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:45,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:45,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:45,716 INFO L124 PetriNetUnfolderBase]: 996/1687 cut-off events. [2024-06-03 20:46:45,716 INFO L125 PetriNetUnfolderBase]: For 27247/27247 co-relation queries the response was YES. [2024-06-03 20:46:45,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9811 conditions, 1687 events. 996/1687 cut-off events. For 27247/27247 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 8977 event pairs, 236 based on Foata normal form. 2/1686 useless extension candidates. Maximal degree in co-relation 9748. Up to 1403 conditions per place. [2024-06-03 20:46:45,728 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 106 selfloop transitions, 78 changer transitions 0/190 dead transitions. [2024-06-03 20:46:45,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 190 transitions, 2274 flow [2024-06-03 20:46:45,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:46:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:46:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-03 20:46:45,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5227272727272727 [2024-06-03 20:46:45,729 INFO L175 Difference]: Start difference. First operand has 129 places, 158 transitions, 1699 flow. Second operand 11 states and 230 transitions. [2024-06-03 20:46:45,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 190 transitions, 2274 flow [2024-06-03 20:46:45,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 190 transitions, 2180 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:45,779 INFO L231 Difference]: Finished difference. Result has 136 places, 164 transitions, 1871 flow [2024-06-03 20:46:45,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1607, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1871, PETRI_PLACES=136, PETRI_TRANSITIONS=164} [2024-06-03 20:46:45,780 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-03 20:46:45,780 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 164 transitions, 1871 flow [2024-06-03 20:46:45,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:45,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:45,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:45,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:46:45,780 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)] === [2024-06-03 20:46:45,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:45,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1170738345, now seen corresponding path program 7 times [2024-06-03 20:46:45,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:45,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005458389] [2024-06-03 20:46:45,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:45,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:45,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:46,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:46,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005458389] [2024-06-03 20:46:46,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005458389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:46,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:46,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:46,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668316963] [2024-06-03 20:46:46,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:46,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:46,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:46,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:46,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:46,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:46,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 164 transitions, 1871 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:46,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:46,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:46,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:46,291 INFO L124 PetriNetUnfolderBase]: 1001/1694 cut-off events. [2024-06-03 20:46:46,291 INFO L125 PetriNetUnfolderBase]: For 28113/28113 co-relation queries the response was YES. [2024-06-03 20:46:46,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10151 conditions, 1694 events. 1001/1694 cut-off events. For 28113/28113 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8984 event pairs, 237 based on Foata normal form. 1/1692 useless extension candidates. Maximal degree in co-relation 10088. Up to 1409 conditions per place. [2024-06-03 20:46:46,303 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 106 selfloop transitions, 77 changer transitions 0/189 dead transitions. [2024-06-03 20:46:46,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 189 transitions, 2392 flow [2024-06-03 20:46:46,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:46,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 20:46:46,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5785714285714286 [2024-06-03 20:46:46,304 INFO L175 Difference]: Start difference. First operand has 136 places, 164 transitions, 1871 flow. Second operand 7 states and 162 transitions. [2024-06-03 20:46:46,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 189 transitions, 2392 flow [2024-06-03 20:46:46,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 189 transitions, 2144 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-03 20:46:46,358 INFO L231 Difference]: Finished difference. Result has 135 places, 167 transitions, 1831 flow [2024-06-03 20:46:46,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1642, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1831, PETRI_PLACES=135, PETRI_TRANSITIONS=167} [2024-06-03 20:46:46,358 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2024-06-03 20:46:46,358 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 167 transitions, 1831 flow [2024-06-03 20:46:46,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:46,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:46,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:46,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:46:46,359 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)] === [2024-06-03 20:46:46,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash -438756515, now seen corresponding path program 8 times [2024-06-03 20:46:46,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:46,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998614837] [2024-06-03 20:46:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:46,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:46,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:46,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998614837] [2024-06-03 20:46:46,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998614837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:46,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:46,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:46,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113694904] [2024-06-03 20:46:46,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:46,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:46,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:46,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:46,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:46,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:46,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 167 transitions, 1831 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:46,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:46,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:46,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:46,924 INFO L124 PetriNetUnfolderBase]: 998/1690 cut-off events. [2024-06-03 20:46:46,925 INFO L125 PetriNetUnfolderBase]: For 28971/28971 co-relation queries the response was YES. [2024-06-03 20:46:46,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10064 conditions, 1690 events. 998/1690 cut-off events. For 28971/28971 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8977 event pairs, 236 based on Foata normal form. 1/1688 useless extension candidates. Maximal degree in co-relation 10000. Up to 1406 conditions per place. [2024-06-03 20:46:46,934 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 105 selfloop transitions, 80 changer transitions 0/191 dead transitions. [2024-06-03 20:46:46,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 191 transitions, 2264 flow [2024-06-03 20:46:46,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:46:46,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:46:46,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-03 20:46:46,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53 [2024-06-03 20:46:46,936 INFO L175 Difference]: Start difference. First operand has 135 places, 167 transitions, 1831 flow. Second operand 10 states and 212 transitions. [2024-06-03 20:46:46,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 191 transitions, 2264 flow [2024-06-03 20:46:46,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 191 transitions, 2136 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:46,981 INFO L231 Difference]: Finished difference. Result has 141 places, 167 transitions, 1869 flow [2024-06-03 20:46:46,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1869, PETRI_PLACES=141, PETRI_TRANSITIONS=167} [2024-06-03 20:46:46,981 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-03 20:46:46,981 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 167 transitions, 1869 flow [2024-06-03 20:46:46,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:46,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:46,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:46,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:46:46,982 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)] === [2024-06-03 20:46:46,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:46,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1643631605, now seen corresponding path program 2 times [2024-06-03 20:46:46,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:46,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989489505] [2024-06-03 20:46:46,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:46,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:46,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:47,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:47,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989489505] [2024-06-03 20:46:47,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989489505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:47,222 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:47,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:47,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330756885] [2024-06-03 20:46:47,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:47,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:47,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:47,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:47,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:47,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 20:46:47,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 167 transitions, 1869 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:47,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:47,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 20:46:47,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:47,496 INFO L124 PetriNetUnfolderBase]: 985/1691 cut-off events. [2024-06-03 20:46:47,496 INFO L125 PetriNetUnfolderBase]: For 33720/33720 co-relation queries the response was YES. [2024-06-03 20:46:47,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10114 conditions, 1691 events. 985/1691 cut-off events. For 33720/33720 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9160 event pairs, 239 based on Foata normal form. 10/1691 useless extension candidates. Maximal degree in co-relation 10049. Up to 1386 conditions per place. [2024-06-03 20:46:47,508 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 136 selfloop transitions, 27 changer transitions 0/191 dead transitions. [2024-06-03 20:46:47,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 191 transitions, 2300 flow [2024-06-03 20:46:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:46:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:46:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-03 20:46:47,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-03 20:46:47,509 INFO L175 Difference]: Start difference. First operand has 141 places, 167 transitions, 1869 flow. Second operand 8 states and 175 transitions. [2024-06-03 20:46:47,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 191 transitions, 2300 flow [2024-06-03 20:46:47,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 191 transitions, 2086 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-03 20:46:47,564 INFO L231 Difference]: Finished difference. Result has 139 places, 168 transitions, 1731 flow [2024-06-03 20:46:47,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1731, PETRI_PLACES=139, PETRI_TRANSITIONS=168} [2024-06-03 20:46:47,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-03 20:46:47,565 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 168 transitions, 1731 flow [2024-06-03 20:46:47,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:47,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:47,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:47,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:46:47,565 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:47,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:47,566 INFO L85 PathProgramCache]: Analyzing trace with hash 520576039, now seen corresponding path program 3 times [2024-06-03 20:46:47,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:47,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643764642] [2024-06-03 20:46:47,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:47,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:47,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:47,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:47,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643764642] [2024-06-03 20:46:47,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643764642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:47,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:47,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:47,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009263941] [2024-06-03 20:46:47,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:47,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:47,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:47,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:47,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:47,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-03 20:46:47,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 168 transitions, 1731 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:47,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:47,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-03 20:46:47,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:48,123 INFO L124 PetriNetUnfolderBase]: 987/1697 cut-off events. [2024-06-03 20:46:48,123 INFO L125 PetriNetUnfolderBase]: For 32902/32902 co-relation queries the response was YES. [2024-06-03 20:46:48,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9982 conditions, 1697 events. 987/1697 cut-off events. For 32902/32902 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 9172 event pairs, 233 based on Foata normal form. 8/1695 useless extension candidates. Maximal degree in co-relation 9916. Up to 1326 conditions per place. [2024-06-03 20:46:48,135 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 136 selfloop transitions, 31 changer transitions 0/195 dead transitions. [2024-06-03 20:46:48,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 195 transitions, 2196 flow [2024-06-03 20:46:48,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:46:48,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:46:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 20:46:48,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-03 20:46:48,136 INFO L175 Difference]: Start difference. First operand has 139 places, 168 transitions, 1731 flow. Second operand 8 states and 177 transitions. [2024-06-03 20:46:48,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 195 transitions, 2196 flow [2024-06-03 20:46:48,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 195 transitions, 2140 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:46:48,205 INFO L231 Difference]: Finished difference. Result has 141 places, 169 transitions, 1759 flow [2024-06-03 20:46:48,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1675, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1759, PETRI_PLACES=141, PETRI_TRANSITIONS=169} [2024-06-03 20:46:48,206 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-03 20:46:48,206 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 169 transitions, 1759 flow [2024-06-03 20:46:48,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:48,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:48,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:48,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:46:48,206 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)] === [2024-06-03 20:46:48,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:48,207 INFO L85 PathProgramCache]: Analyzing trace with hash 10276749, now seen corresponding path program 1 times [2024-06-03 20:46:48,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:48,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275369773] [2024-06-03 20:46:48,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:48,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:48,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:48,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275369773] [2024-06-03 20:46:48,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275369773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:48,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:48,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:48,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282457582] [2024-06-03 20:46:48,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:48,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:48,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:48,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:48,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:48,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:48,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 169 transitions, 1759 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:48,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:48,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:48,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:48,666 INFO L124 PetriNetUnfolderBase]: 1089/1847 cut-off events. [2024-06-03 20:46:48,666 INFO L125 PetriNetUnfolderBase]: For 37136/37136 co-relation queries the response was YES. [2024-06-03 20:46:48,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10907 conditions, 1847 events. 1089/1847 cut-off events. For 37136/37136 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10027 event pairs, 258 based on Foata normal form. 6/1850 useless extension candidates. Maximal degree in co-relation 10840. Up to 1534 conditions per place. [2024-06-03 20:46:48,679 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 171 selfloop transitions, 26 changer transitions 0/203 dead transitions. [2024-06-03 20:46:48,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 203 transitions, 2376 flow [2024-06-03 20:46:48,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:48,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 20:46:48,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-03 20:46:48,680 INFO L175 Difference]: Start difference. First operand has 141 places, 169 transitions, 1759 flow. Second operand 7 states and 157 transitions. [2024-06-03 20:46:48,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 203 transitions, 2376 flow [2024-06-03 20:46:48,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 203 transitions, 2308 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:46:48,743 INFO L231 Difference]: Finished difference. Result has 144 places, 174 transitions, 1804 flow [2024-06-03 20:46:48,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1691, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1804, PETRI_PLACES=144, PETRI_TRANSITIONS=174} [2024-06-03 20:46:48,743 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-03 20:46:48,743 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 174 transitions, 1804 flow [2024-06-03 20:46:48,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:48,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:48,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:48,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:46:48,744 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:48,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:48,744 INFO L85 PathProgramCache]: Analyzing trace with hash 2074708467, now seen corresponding path program 2 times [2024-06-03 20:46:48,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:48,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145373254] [2024-06-03 20:46:48,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:48,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:48,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:48,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145373254] [2024-06-03 20:46:48,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145373254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:48,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:48,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:48,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030637901] [2024-06-03 20:46:48,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:48,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:48,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:48,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:48,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:48,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:48,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 174 transitions, 1804 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:48,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:48,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:48,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:49,211 INFO L124 PetriNetUnfolderBase]: 1155/1949 cut-off events. [2024-06-03 20:46:49,211 INFO L125 PetriNetUnfolderBase]: For 42591/42591 co-relation queries the response was YES. [2024-06-03 20:46:49,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11697 conditions, 1949 events. 1155/1949 cut-off events. For 42591/42591 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10628 event pairs, 276 based on Foata normal form. 6/1952 useless extension candidates. Maximal degree in co-relation 11627. Up to 1684 conditions per place. [2024-06-03 20:46:49,225 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 169 selfloop transitions, 25 changer transitions 0/200 dead transitions. [2024-06-03 20:46:49,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 200 transitions, 2378 flow [2024-06-03 20:46:49,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:49,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:49,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 20:46:49,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-03 20:46:49,226 INFO L175 Difference]: Start difference. First operand has 144 places, 174 transitions, 1804 flow. Second operand 7 states and 154 transitions. [2024-06-03 20:46:49,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 200 transitions, 2378 flow [2024-06-03 20:46:49,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 200 transitions, 2348 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 20:46:49,293 INFO L231 Difference]: Finished difference. Result has 150 places, 177 transitions, 1862 flow [2024-06-03 20:46:49,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1774, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1862, PETRI_PLACES=150, PETRI_TRANSITIONS=177} [2024-06-03 20:46:49,294 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 109 predicate places. [2024-06-03 20:46:49,294 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 177 transitions, 1862 flow [2024-06-03 20:46:49,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:49,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:49,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:49,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:46:49,294 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:49,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash -778912823, now seen corresponding path program 3 times [2024-06-03 20:46:49,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:49,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425211500] [2024-06-03 20:46:49,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:49,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:49,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:49,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425211500] [2024-06-03 20:46:49,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425211500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:49,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:49,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:49,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28137330] [2024-06-03 20:46:49,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:49,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:49,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:49,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:49,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:49,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:49,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 177 transitions, 1862 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:49,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:49,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:49,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:49,774 INFO L124 PetriNetUnfolderBase]: 1137/1923 cut-off events. [2024-06-03 20:46:49,774 INFO L125 PetriNetUnfolderBase]: For 42316/42316 co-relation queries the response was YES. [2024-06-03 20:46:49,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11561 conditions, 1923 events. 1137/1923 cut-off events. For 42316/42316 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10465 event pairs, 274 based on Foata normal form. 8/1928 useless extension candidates. Maximal degree in co-relation 11488. Up to 1706 conditions per place. [2024-06-03 20:46:49,789 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 167 selfloop transitions, 24 changer transitions 0/197 dead transitions. [2024-06-03 20:46:49,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 197 transitions, 2337 flow [2024-06-03 20:46:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 20:46:49,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-06-03 20:46:49,790 INFO L175 Difference]: Start difference. First operand has 150 places, 177 transitions, 1862 flow. Second operand 7 states and 150 transitions. [2024-06-03 20:46:49,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 197 transitions, 2337 flow [2024-06-03 20:46:49,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 197 transitions, 2305 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:49,878 INFO L231 Difference]: Finished difference. Result has 154 places, 178 transitions, 1897 flow [2024-06-03 20:46:49,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1832, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1897, PETRI_PLACES=154, PETRI_TRANSITIONS=178} [2024-06-03 20:46:49,879 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 113 predicate places. [2024-06-03 20:46:49,879 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 178 transitions, 1897 flow [2024-06-03 20:46:49,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:49,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:49,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:49,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:46:49,879 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:49,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:49,880 INFO L85 PathProgramCache]: Analyzing trace with hash 512957479, now seen corresponding path program 4 times [2024-06-03 20:46:49,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:49,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196659883] [2024-06-03 20:46:49,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:49,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:49,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:50,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:50,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196659883] [2024-06-03 20:46:50,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196659883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:50,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:50,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:50,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206537166] [2024-06-03 20:46:50,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:50,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:50,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:50,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:50,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:50,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:50,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 178 transitions, 1897 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:50,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:50,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:50,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:50,386 INFO L124 PetriNetUnfolderBase]: 1165/1967 cut-off events. [2024-06-03 20:46:50,386 INFO L125 PetriNetUnfolderBase]: For 44732/44732 co-relation queries the response was YES. [2024-06-03 20:46:50,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11914 conditions, 1967 events. 1165/1967 cut-off events. For 44732/44732 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10770 event pairs, 277 based on Foata normal form. 8/1972 useless extension candidates. Maximal degree in co-relation 11839. Up to 1756 conditions per place. [2024-06-03 20:46:50,401 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 173 selfloop transitions, 20 changer transitions 0/199 dead transitions. [2024-06-03 20:46:50,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 199 transitions, 2377 flow [2024-06-03 20:46:50,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:46:50,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:46:50,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-03 20:46:50,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-03 20:46:50,402 INFO L175 Difference]: Start difference. First operand has 154 places, 178 transitions, 1897 flow. Second operand 8 states and 165 transitions. [2024-06-03 20:46:50,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 199 transitions, 2377 flow [2024-06-03 20:46:50,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 199 transitions, 2332 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:46:50,481 INFO L231 Difference]: Finished difference. Result has 157 places, 179 transitions, 1910 flow [2024-06-03 20:46:50,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1852, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1910, PETRI_PLACES=157, PETRI_TRANSITIONS=179} [2024-06-03 20:46:50,482 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-03 20:46:50,482 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 179 transitions, 1910 flow [2024-06-03 20:46:50,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:50,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:50,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:50,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:46:50,482 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:50,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:50,483 INFO L85 PathProgramCache]: Analyzing trace with hash 313655689, now seen corresponding path program 5 times [2024-06-03 20:46:50,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:50,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252818431] [2024-06-03 20:46:50,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:50,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:50,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:50,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:50,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252818431] [2024-06-03 20:46:50,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252818431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:50,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:50,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:50,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685968320] [2024-06-03 20:46:50,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:50,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:50,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:50,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:50,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:50,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 179 transitions, 1910 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:50,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:50,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:50,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:51,030 INFO L124 PetriNetUnfolderBase]: 1180/1996 cut-off events. [2024-06-03 20:46:51,030 INFO L125 PetriNetUnfolderBase]: For 46091/46091 co-relation queries the response was YES. [2024-06-03 20:46:51,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12088 conditions, 1996 events. 1180/1996 cut-off events. For 46091/46091 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10976 event pairs, 283 based on Foata normal form. 8/2001 useless extension candidates. Maximal degree in co-relation 12012. Up to 1781 conditions per place. [2024-06-03 20:46:51,045 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 173 selfloop transitions, 19 changer transitions 0/198 dead transitions. [2024-06-03 20:46:51,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 198 transitions, 2386 flow [2024-06-03 20:46:51,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:51,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-03 20:46:51,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5541666666666667 [2024-06-03 20:46:51,046 INFO L175 Difference]: Start difference. First operand has 157 places, 179 transitions, 1910 flow. Second operand 6 states and 133 transitions. [2024-06-03 20:46:51,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 198 transitions, 2386 flow [2024-06-03 20:46:51,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 198 transitions, 2345 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:46:51,126 INFO L231 Difference]: Finished difference. Result has 157 places, 180 transitions, 1927 flow [2024-06-03 20:46:51,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1869, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1927, PETRI_PLACES=157, PETRI_TRANSITIONS=180} [2024-06-03 20:46:51,126 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-03 20:46:51,127 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 180 transitions, 1927 flow [2024-06-03 20:46:51,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:51,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:51,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:51,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:46:51,127 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:51,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:51,127 INFO L85 PathProgramCache]: Analyzing trace with hash 313507819, now seen corresponding path program 6 times [2024-06-03 20:46:51,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:51,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377084614] [2024-06-03 20:46:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:51,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:51,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:51,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:51,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377084614] [2024-06-03 20:46:51,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377084614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:51,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:51,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:51,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147470990] [2024-06-03 20:46:51,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:51,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:51,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:51,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:51,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:51,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:51,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 180 transitions, 1927 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:51,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:51,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:51,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:51,641 INFO L124 PetriNetUnfolderBase]: 1167/1977 cut-off events. [2024-06-03 20:46:51,641 INFO L125 PetriNetUnfolderBase]: For 44069/44069 co-relation queries the response was YES. [2024-06-03 20:46:51,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11876 conditions, 1977 events. 1167/1977 cut-off events. For 44069/44069 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10872 event pairs, 262 based on Foata normal form. 6/1980 useless extension candidates. Maximal degree in co-relation 11799. Up to 1682 conditions per place. [2024-06-03 20:46:51,656 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 177 selfloop transitions, 23 changer transitions 0/206 dead transitions. [2024-06-03 20:46:51,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 206 transitions, 2459 flow [2024-06-03 20:46:51,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:51,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-03 20:46:51,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-03 20:46:51,657 INFO L175 Difference]: Start difference. First operand has 157 places, 180 transitions, 1927 flow. Second operand 6 states and 139 transitions. [2024-06-03 20:46:51,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 206 transitions, 2459 flow [2024-06-03 20:46:51,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 206 transitions, 2414 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:51,733 INFO L231 Difference]: Finished difference. Result has 160 places, 182 transitions, 1970 flow [2024-06-03 20:46:51,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1884, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1970, PETRI_PLACES=160, PETRI_TRANSITIONS=182} [2024-06-03 20:46:51,733 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-03 20:46:51,733 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 182 transitions, 1970 flow [2024-06-03 20:46:51,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:51,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:51,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:51,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:46:51,734 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:51,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:51,734 INFO L85 PathProgramCache]: Analyzing trace with hash 520581991, now seen corresponding path program 1 times [2024-06-03 20:46:51,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:51,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125252462] [2024-06-03 20:46:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:51,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:51,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:51,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125252462] [2024-06-03 20:46:51,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125252462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:51,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:51,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:46:51,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508378919] [2024-06-03 20:46:51,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:51,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:46:51,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:51,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:46:51,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:46:51,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:51,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 182 transitions, 1970 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:51,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:51,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:51,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:52,231 INFO L124 PetriNetUnfolderBase]: 1154/1950 cut-off events. [2024-06-03 20:46:52,231 INFO L125 PetriNetUnfolderBase]: For 42377/42377 co-relation queries the response was YES. [2024-06-03 20:46:52,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11695 conditions, 1950 events. 1154/1950 cut-off events. For 42377/42377 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 10636 event pairs, 254 based on Foata normal form. 6/1953 useless extension candidates. Maximal degree in co-relation 11616. Up to 1681 conditions per place. [2024-06-03 20:46:52,247 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 175 selfloop transitions, 24 changer transitions 0/205 dead transitions. [2024-06-03 20:46:52,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 205 transitions, 2475 flow [2024-06-03 20:46:52,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:46:52,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:46:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 20:46:52,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.521875 [2024-06-03 20:46:52,248 INFO L175 Difference]: Start difference. First operand has 160 places, 182 transitions, 1970 flow. Second operand 8 states and 167 transitions. [2024-06-03 20:46:52,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 205 transitions, 2475 flow [2024-06-03 20:46:52,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 205 transitions, 2399 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:46:52,324 INFO L231 Difference]: Finished difference. Result has 163 places, 182 transitions, 1946 flow [2024-06-03 20:46:52,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1946, PETRI_PLACES=163, PETRI_TRANSITIONS=182} [2024-06-03 20:46:52,324 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 122 predicate places. [2024-06-03 20:46:52,325 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 182 transitions, 1946 flow [2024-06-03 20:46:52,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:52,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:52,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:52,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:46:52,325 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:52,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:52,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1117877817, now seen corresponding path program 1 times [2024-06-03 20:46:52,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:52,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701522438] [2024-06-03 20:46:52,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:52,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:52,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:52,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:52,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701522438] [2024-06-03 20:46:52,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701522438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:52,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:52,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:46:52,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552833866] [2024-06-03 20:46:52,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:52,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:46:52,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:52,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:46:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:46:52,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:52,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 182 transitions, 1946 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:52,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:52,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:52,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:52,952 INFO L124 PetriNetUnfolderBase]: 1169/1974 cut-off events. [2024-06-03 20:46:52,952 INFO L125 PetriNetUnfolderBase]: For 41539/41542 co-relation queries the response was YES. [2024-06-03 20:46:52,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11767 conditions, 1974 events. 1169/1974 cut-off events. For 41539/41542 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10806 event pairs, 285 based on Foata normal form. 1/1968 useless extension candidates. Maximal degree in co-relation 11688. Up to 1694 conditions per place. [2024-06-03 20:46:52,965 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 129 selfloop transitions, 70 changer transitions 0/205 dead transitions. [2024-06-03 20:46:52,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 205 transitions, 2486 flow [2024-06-03 20:46:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 20:46:52,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-03 20:46:52,979 INFO L175 Difference]: Start difference. First operand has 163 places, 182 transitions, 1946 flow. Second operand 7 states and 157 transitions. [2024-06-03 20:46:52,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 205 transitions, 2486 flow [2024-06-03 20:46:53,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 205 transitions, 2418 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:46:53,057 INFO L231 Difference]: Finished difference. Result has 164 places, 191 transitions, 2170 flow [2024-06-03 20:46:53,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1878, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2170, PETRI_PLACES=164, PETRI_TRANSITIONS=191} [2024-06-03 20:46:53,057 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-03 20:46:53,058 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 191 transitions, 2170 flow [2024-06-03 20:46:53,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:53,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:53,058 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] [2024-06-03 20:46:53,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:46:53,058 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:53,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:53,058 INFO L85 PathProgramCache]: Analyzing trace with hash 375554783, now seen corresponding path program 1 times [2024-06-03 20:46:53,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:53,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787305005] [2024-06-03 20:46:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:53,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:53,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:53,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:53,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:53,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787305005] [2024-06-03 20:46:53,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787305005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:53,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:53,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:53,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446433026] [2024-06-03 20:46:53,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:53,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:53,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:53,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:53,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:53,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:53,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 191 transitions, 2170 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:53,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:53,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:53,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:53,583 INFO L124 PetriNetUnfolderBase]: 1189/2010 cut-off events. [2024-06-03 20:46:53,583 INFO L125 PetriNetUnfolderBase]: For 48144/48147 co-relation queries the response was YES. [2024-06-03 20:46:53,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12215 conditions, 2010 events. 1189/2010 cut-off events. For 48144/48147 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 11002 event pairs, 212 based on Foata normal form. 6/2009 useless extension candidates. Maximal degree in co-relation 12135. Up to 1645 conditions per place. [2024-06-03 20:46:53,598 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 181 selfloop transitions, 29 changer transitions 0/216 dead transitions. [2024-06-03 20:46:53,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 216 transitions, 2800 flow [2024-06-03 20:46:53,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 20:46:53,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-03 20:46:53,599 INFO L175 Difference]: Start difference. First operand has 164 places, 191 transitions, 2170 flow. Second operand 7 states and 157 transitions. [2024-06-03 20:46:53,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 216 transitions, 2800 flow [2024-06-03 20:46:53,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 216 transitions, 2623 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 20:46:53,690 INFO L231 Difference]: Finished difference. Result has 166 places, 192 transitions, 2075 flow [2024-06-03 20:46:53,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1997, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2075, PETRI_PLACES=166, PETRI_TRANSITIONS=192} [2024-06-03 20:46:53,691 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-03 20:46:53,691 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 192 transitions, 2075 flow [2024-06-03 20:46:53,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:53,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:53,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:53,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:46:53,691 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:53,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:53,692 INFO L85 PathProgramCache]: Analyzing trace with hash 2146633815, now seen corresponding path program 2 times [2024-06-03 20:46:53,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:53,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19415110] [2024-06-03 20:46:53,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:53,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:53,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:53,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:53,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:53,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19415110] [2024-06-03 20:46:53,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19415110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:53,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:53,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:53,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557657706] [2024-06-03 20:46:53,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:53,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:53,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:53,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:53,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:53,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:53,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 192 transitions, 2075 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:53,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:53,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:53,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:54,277 INFO L124 PetriNetUnfolderBase]: 1176/1991 cut-off events. [2024-06-03 20:46:54,277 INFO L125 PetriNetUnfolderBase]: For 44342/44345 co-relation queries the response was YES. [2024-06-03 20:46:54,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11810 conditions, 1991 events. 1176/1991 cut-off events. For 44342/44345 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 10904 event pairs, 201 based on Foata normal form. 6/1990 useless extension candidates. Maximal degree in co-relation 11729. Up to 1639 conditions per place. [2024-06-03 20:46:54,294 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 178 selfloop transitions, 29 changer transitions 0/213 dead transitions. [2024-06-03 20:46:54,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 213 transitions, 2603 flow [2024-06-03 20:46:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:46:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:46:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-03 20:46:54,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-03 20:46:54,300 INFO L175 Difference]: Start difference. First operand has 166 places, 192 transitions, 2075 flow. Second operand 6 states and 139 transitions. [2024-06-03 20:46:54,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 213 transitions, 2603 flow [2024-06-03 20:46:54,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 213 transitions, 2542 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:54,405 INFO L231 Difference]: Finished difference. Result has 169 places, 192 transitions, 2078 flow [2024-06-03 20:46:54,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2078, PETRI_PLACES=169, PETRI_TRANSITIONS=192} [2024-06-03 20:46:54,407 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-03 20:46:54,407 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 192 transitions, 2078 flow [2024-06-03 20:46:54,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:54,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:54,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:54,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:46:54,408 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:54,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:54,408 INFO L85 PathProgramCache]: Analyzing trace with hash -736899555, now seen corresponding path program 2 times [2024-06-03 20:46:54,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:54,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180108921] [2024-06-03 20:46:54,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:54,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:54,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:54,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180108921] [2024-06-03 20:46:54,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180108921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:54,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:54,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:54,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844058537] [2024-06-03 20:46:54,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:54,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:54,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:54,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:54,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:54,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:54,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 192 transitions, 2078 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:54,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:54,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:54,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:54,918 INFO L124 PetriNetUnfolderBase]: 1189/2013 cut-off events. [2024-06-03 20:46:54,919 INFO L125 PetriNetUnfolderBase]: For 43796/43799 co-relation queries the response was YES. [2024-06-03 20:46:54,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12025 conditions, 2013 events. 1189/2013 cut-off events. For 43796/43799 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 11097 event pairs, 284 based on Foata normal form. 1/2007 useless extension candidates. Maximal degree in co-relation 11943. Up to 1656 conditions per place. [2024-06-03 20:46:54,934 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 113 selfloop transitions, 100 changer transitions 0/219 dead transitions. [2024-06-03 20:46:54,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 219 transitions, 2752 flow [2024-06-03 20:46:54,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:46:54,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:46:54,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-03 20:46:54,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-03 20:46:54,935 INFO L175 Difference]: Start difference. First operand has 169 places, 192 transitions, 2078 flow. Second operand 10 states and 210 transitions. [2024-06-03 20:46:54,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 219 transitions, 2752 flow [2024-06-03 20:46:55,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 219 transitions, 2686 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:46:55,112 INFO L231 Difference]: Finished difference. Result has 174 places, 198 transitions, 2350 flow [2024-06-03 20:46:55,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2014, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2350, PETRI_PLACES=174, PETRI_TRANSITIONS=198} [2024-06-03 20:46:55,113 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 133 predicate places. [2024-06-03 20:46:55,113 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 198 transitions, 2350 flow [2024-06-03 20:46:55,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:55,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:55,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:55,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:46:55,113 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:55,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:55,114 INFO L85 PathProgramCache]: Analyzing trace with hash -728557455, now seen corresponding path program 3 times [2024-06-03 20:46:55,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:55,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773217817] [2024-06-03 20:46:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:55,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:55,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:55,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:55,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773217817] [2024-06-03 20:46:55,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773217817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:55,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:55,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:55,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089508293] [2024-06-03 20:46:55,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:55,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:55,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:55,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:55,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:55,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:55,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 198 transitions, 2350 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:55,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:55,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:55,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:55,623 INFO L124 PetriNetUnfolderBase]: 1202/2035 cut-off events. [2024-06-03 20:46:55,623 INFO L125 PetriNetUnfolderBase]: For 46914/46917 co-relation queries the response was YES. [2024-06-03 20:46:55,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12580 conditions, 2035 events. 1202/2035 cut-off events. For 46914/46917 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11247 event pairs, 284 based on Foata normal form. 1/2029 useless extension candidates. Maximal degree in co-relation 12498. Up to 1671 conditions per place. [2024-06-03 20:46:55,638 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 115 selfloop transitions, 101 changer transitions 0/222 dead transitions. [2024-06-03 20:46:55,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 222 transitions, 3108 flow [2024-06-03 20:46:55,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:46:55,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:46:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-03 20:46:55,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388888888888889 [2024-06-03 20:46:55,639 INFO L175 Difference]: Start difference. First operand has 174 places, 198 transitions, 2350 flow. Second operand 9 states and 194 transitions. [2024-06-03 20:46:55,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 222 transitions, 3108 flow [2024-06-03 20:46:55,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 222 transitions, 2859 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-03 20:46:55,740 INFO L231 Difference]: Finished difference. Result has 177 places, 204 transitions, 2446 flow [2024-06-03 20:46:55,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2145, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2446, PETRI_PLACES=177, PETRI_TRANSITIONS=204} [2024-06-03 20:46:55,741 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-03 20:46:55,741 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 204 transitions, 2446 flow [2024-06-03 20:46:55,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:55,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:55,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:55,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:46:55,741 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:55,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:55,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1967569237, now seen corresponding path program 4 times [2024-06-03 20:46:55,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:55,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475956189] [2024-06-03 20:46:55,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:55,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:55,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:55,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475956189] [2024-06-03 20:46:55,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475956189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:55,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:55,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:55,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27794015] [2024-06-03 20:46:55,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:55,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:55,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:55,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:55,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:55,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:55,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 204 transitions, 2446 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:55,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:55,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:55,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:56,352 INFO L124 PetriNetUnfolderBase]: 1199/2031 cut-off events. [2024-06-03 20:46:56,352 INFO L125 PetriNetUnfolderBase]: For 45350/45353 co-relation queries the response was YES. [2024-06-03 20:46:56,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12348 conditions, 2031 events. 1199/2031 cut-off events. For 45350/45353 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11213 event pairs, 284 based on Foata normal form. 1/2025 useless extension candidates. Maximal degree in co-relation 12264. Up to 1668 conditions per place. [2024-06-03 20:46:56,370 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 114 selfloop transitions, 103 changer transitions 0/223 dead transitions. [2024-06-03 20:46:56,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 223 transitions, 3000 flow [2024-06-03 20:46:56,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:46:56,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:46:56,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-03 20:46:56,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159090909090909 [2024-06-03 20:46:56,371 INFO L175 Difference]: Start difference. First operand has 177 places, 204 transitions, 2446 flow. Second operand 11 states and 227 transitions. [2024-06-03 20:46:56,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 223 transitions, 3000 flow [2024-06-03 20:46:56,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 223 transitions, 2794 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-03 20:46:56,481 INFO L231 Difference]: Finished difference. Result has 183 places, 204 transitions, 2452 flow [2024-06-03 20:46:56,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2452, PETRI_PLACES=183, PETRI_TRANSITIONS=204} [2024-06-03 20:46:56,482 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2024-06-03 20:46:56,482 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 204 transitions, 2452 flow [2024-06-03 20:46:56,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:56,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:56,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:56,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:46:56,482 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:56,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:56,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2049303645, now seen corresponding path program 5 times [2024-06-03 20:46:56,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:56,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415296931] [2024-06-03 20:46:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:56,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:56,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:56,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:56,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415296931] [2024-06-03 20:46:56,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415296931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:56,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:56,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:56,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768400013] [2024-06-03 20:46:56,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:56,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:56,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:56,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:56,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:56,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:56,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 204 transitions, 2452 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:56,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:56,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:56,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:57,009 INFO L124 PetriNetUnfolderBase]: 1228/2083 cut-off events. [2024-06-03 20:46:57,010 INFO L125 PetriNetUnfolderBase]: For 48234/48237 co-relation queries the response was YES. [2024-06-03 20:46:57,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12730 conditions, 2083 events. 1228/2083 cut-off events. For 48234/48237 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11588 event pairs, 284 based on Foata normal form. 1/2077 useless extension candidates. Maximal degree in co-relation 12645. Up to 1777 conditions per place. [2024-06-03 20:46:57,026 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 164 selfloop transitions, 64 changer transitions 0/234 dead transitions. [2024-06-03 20:46:57,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 234 transitions, 3205 flow [2024-06-03 20:46:57,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:57,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:57,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-03 20:46:57,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678571428571428 [2024-06-03 20:46:57,027 INFO L175 Difference]: Start difference. First operand has 183 places, 204 transitions, 2452 flow. Second operand 7 states and 159 transitions. [2024-06-03 20:46:57,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 234 transitions, 3205 flow [2024-06-03 20:46:57,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 234 transitions, 2949 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-03 20:46:57,123 INFO L231 Difference]: Finished difference. Result has 181 places, 216 transitions, 2536 flow [2024-06-03 20:46:57,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2220, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2536, PETRI_PLACES=181, PETRI_TRANSITIONS=216} [2024-06-03 20:46:57,124 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-03 20:46:57,124 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 216 transitions, 2536 flow [2024-06-03 20:46:57,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:57,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:57,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:57,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:46:57,124 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:57,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:57,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2049313875, now seen corresponding path program 6 times [2024-06-03 20:46:57,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:57,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853881561] [2024-06-03 20:46:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:57,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:57,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:57,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:57,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853881561] [2024-06-03 20:46:57,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853881561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:57,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:57,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:57,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737889123] [2024-06-03 20:46:57,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:57,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:57,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:57,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:57,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:57,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:57,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 216 transitions, 2536 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:57,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:57,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:57,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:57,644 INFO L124 PetriNetUnfolderBase]: 1233/2092 cut-off events. [2024-06-03 20:46:57,644 INFO L125 PetriNetUnfolderBase]: For 49946/49949 co-relation queries the response was YES. [2024-06-03 20:46:57,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12783 conditions, 2092 events. 1233/2092 cut-off events. For 49946/49949 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11654 event pairs, 284 based on Foata normal form. 1/2086 useless extension candidates. Maximal degree in co-relation 12696. Up to 1783 conditions per place. [2024-06-03 20:46:57,660 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 161 selfloop transitions, 67 changer transitions 0/234 dead transitions. [2024-06-03 20:46:57,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 234 transitions, 3166 flow [2024-06-03 20:46:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:46:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:46:57,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-03 20:46:57,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-03 20:46:57,661 INFO L175 Difference]: Start difference. First operand has 181 places, 216 transitions, 2536 flow. Second operand 7 states and 156 transitions. [2024-06-03 20:46:57,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 234 transitions, 3166 flow [2024-06-03 20:46:57,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 234 transitions, 3068 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 20:46:57,781 INFO L231 Difference]: Finished difference. Result has 185 places, 219 transitions, 2636 flow [2024-06-03 20:46:57,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2438, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2636, PETRI_PLACES=185, PETRI_TRANSITIONS=219} [2024-06-03 20:46:57,781 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-03 20:46:57,781 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 219 transitions, 2636 flow [2024-06-03 20:46:57,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:57,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:57,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:57,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:46:57,782 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:57,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:57,782 INFO L85 PathProgramCache]: Analyzing trace with hash -745903873, now seen corresponding path program 7 times [2024-06-03 20:46:57,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:57,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421567000] [2024-06-03 20:46:57,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:57,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:57,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:57,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:57,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421567000] [2024-06-03 20:46:57,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421567000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:57,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:57,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:46:57,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877679074] [2024-06-03 20:46:57,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:57,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:46:57,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:57,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:46:57,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:46:58,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:58,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 219 transitions, 2636 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:58,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:58,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:58,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:58,329 INFO L124 PetriNetUnfolderBase]: 1230/2088 cut-off events. [2024-06-03 20:46:58,329 INFO L125 PetriNetUnfolderBase]: For 50870/50873 co-relation queries the response was YES. [2024-06-03 20:46:58,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12864 conditions, 2088 events. 1230/2088 cut-off events. For 50870/50873 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11615 event pairs, 284 based on Foata normal form. 1/2082 useless extension candidates. Maximal degree in co-relation 12775. Up to 1780 conditions per place. [2024-06-03 20:46:58,347 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 161 selfloop transitions, 67 changer transitions 0/234 dead transitions. [2024-06-03 20:46:58,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 234 transitions, 3128 flow [2024-06-03 20:46:58,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:46:58,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:46:58,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-03 20:46:58,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540625 [2024-06-03 20:46:58,348 INFO L175 Difference]: Start difference. First operand has 185 places, 219 transitions, 2636 flow. Second operand 8 states and 173 transitions. [2024-06-03 20:46:58,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 234 transitions, 3128 flow [2024-06-03 20:46:58,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 234 transitions, 2975 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-03 20:46:58,493 INFO L231 Difference]: Finished difference. Result has 189 places, 219 transitions, 2623 flow [2024-06-03 20:46:58,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2483, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2623, PETRI_PLACES=189, PETRI_TRANSITIONS=219} [2024-06-03 20:46:58,493 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 148 predicate places. [2024-06-03 20:46:58,493 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 219 transitions, 2623 flow [2024-06-03 20:46:58,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:58,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:58,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:58,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:46:58,494 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:58,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:58,494 INFO L85 PathProgramCache]: Analyzing trace with hash -104208565, now seen corresponding path program 8 times [2024-06-03 20:46:58,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:58,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233609176] [2024-06-03 20:46:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:58,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:58,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:58,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:58,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:58,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233609176] [2024-06-03 20:46:58,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233609176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:58,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:58,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:46:58,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318644523] [2024-06-03 20:46:58,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:58,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:46:58,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:58,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:46:58,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:46:58,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:58,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 219 transitions, 2623 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:58,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:58,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:58,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:59,074 INFO L124 PetriNetUnfolderBase]: 1235/2098 cut-off events. [2024-06-03 20:46:59,074 INFO L125 PetriNetUnfolderBase]: For 52617/52617 co-relation queries the response was YES. [2024-06-03 20:46:59,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12953 conditions, 2098 events. 1235/2098 cut-off events. For 52617/52617 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 11733 event pairs, 267 based on Foata normal form. 1/2096 useless extension candidates. Maximal degree in co-relation 12863. Up to 1675 conditions per place. [2024-06-03 20:46:59,093 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 118 selfloop transitions, 131 changer transitions 0/255 dead transitions. [2024-06-03 20:46:59,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 255 transitions, 3406 flow [2024-06-03 20:46:59,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:46:59,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:46:59,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-03 20:46:59,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-06-03 20:46:59,095 INFO L175 Difference]: Start difference. First operand has 189 places, 219 transitions, 2623 flow. Second operand 12 states and 251 transitions. [2024-06-03 20:46:59,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 255 transitions, 3406 flow [2024-06-03 20:46:59,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 255 transitions, 3258 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:46:59,247 INFO L231 Difference]: Finished difference. Result has 195 places, 225 transitions, 2873 flow [2024-06-03 20:46:59,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2873, PETRI_PLACES=195, PETRI_TRANSITIONS=225} [2024-06-03 20:46:59,248 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-03 20:46:59,248 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 225 transitions, 2873 flow [2024-06-03 20:46:59,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:59,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:59,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:59,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:46:59,248 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:59,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:59,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1121171515, now seen corresponding path program 9 times [2024-06-03 20:46:59,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:59,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400777874] [2024-06-03 20:46:59,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:59,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:59,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:59,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400777874] [2024-06-03 20:46:59,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400777874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:59,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:59,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:46:59,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858357683] [2024-06-03 20:46:59,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:59,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:46:59,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:59,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:46:59,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:46:59,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:46:59,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 225 transitions, 2873 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:46:59,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:59,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:46:59,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:59,888 INFO L124 PetriNetUnfolderBase]: 1240/2106 cut-off events. [2024-06-03 20:46:59,888 INFO L125 PetriNetUnfolderBase]: For 56922/56925 co-relation queries the response was YES. [2024-06-03 20:46:59,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13450 conditions, 2106 events. 1240/2106 cut-off events. For 56922/56925 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11760 event pairs, 284 based on Foata normal form. 1/2100 useless extension candidates. Maximal degree in co-relation 13359. Up to 1783 conditions per place. [2024-06-03 20:46:59,907 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 171 selfloop transitions, 70 changer transitions 0/247 dead transitions. [2024-06-03 20:46:59,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 247 transitions, 3548 flow [2024-06-03 20:46:59,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:46:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:46:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 20:46:59,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-03 20:46:59,908 INFO L175 Difference]: Start difference. First operand has 195 places, 225 transitions, 2873 flow. Second operand 8 states and 174 transitions. [2024-06-03 20:46:59,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 247 transitions, 3548 flow [2024-06-03 20:47:00,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 247 transitions, 3418 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:00,064 INFO L231 Difference]: Finished difference. Result has 197 places, 228 transitions, 2954 flow [2024-06-03 20:47:00,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2954, PETRI_PLACES=197, PETRI_TRANSITIONS=228} [2024-06-03 20:47:00,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-03 20:47:00,065 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 228 transitions, 2954 flow [2024-06-03 20:47:00,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:00,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:00,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:00,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:47:00,066 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:00,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:00,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1121181745, now seen corresponding path program 10 times [2024-06-03 20:47:00,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:00,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867987213] [2024-06-03 20:47:00,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:00,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:00,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:00,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:00,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867987213] [2024-06-03 20:47:00,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867987213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:00,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:00,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:00,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608967356] [2024-06-03 20:47:00,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:00,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:00,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:00,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:00,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:00,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:00,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 228 transitions, 2954 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:00,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:00,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:00,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:00,674 INFO L124 PetriNetUnfolderBase]: 1237/2102 cut-off events. [2024-06-03 20:47:00,674 INFO L125 PetriNetUnfolderBase]: For 56142/56145 co-relation queries the response was YES. [2024-06-03 20:47:00,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13277 conditions, 2102 events. 1237/2102 cut-off events. For 56142/56145 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 11759 event pairs, 284 based on Foata normal form. 1/2096 useless extension candidates. Maximal degree in co-relation 13184. Up to 1780 conditions per place. [2024-06-03 20:47:00,693 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 169 selfloop transitions, 66 changer transitions 0/241 dead transitions. [2024-06-03 20:47:00,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 241 transitions, 3456 flow [2024-06-03 20:47:00,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:00,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-03 20:47:00,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 20:47:00,694 INFO L175 Difference]: Start difference. First operand has 197 places, 228 transitions, 2954 flow. Second operand 6 states and 135 transitions. [2024-06-03 20:47:00,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 241 transitions, 3456 flow [2024-06-03 20:47:00,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 241 transitions, 3187 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:00,861 INFO L231 Difference]: Finished difference. Result has 195 places, 228 transitions, 2827 flow [2024-06-03 20:47:00,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2827, PETRI_PLACES=195, PETRI_TRANSITIONS=228} [2024-06-03 20:47:00,861 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 154 predicate places. [2024-06-03 20:47:00,861 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 228 transitions, 2827 flow [2024-06-03 20:47:00,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:00,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:00,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:00,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:47:00,862 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:00,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:00,862 INFO L85 PathProgramCache]: Analyzing trace with hash -882783413, now seen corresponding path program 11 times [2024-06-03 20:47:00,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:00,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113955788] [2024-06-03 20:47:00,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:00,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:01,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:01,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113955788] [2024-06-03 20:47:01,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113955788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:01,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:01,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:01,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572390008] [2024-06-03 20:47:01,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:01,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:01,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:01,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:01,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 228 transitions, 2827 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:01,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:01,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:01,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:01,433 INFO L124 PetriNetUnfolderBase]: 1242/2112 cut-off events. [2024-06-03 20:47:01,433 INFO L125 PetriNetUnfolderBase]: For 55540/55540 co-relation queries the response was YES. [2024-06-03 20:47:01,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13250 conditions, 2112 events. 1242/2112 cut-off events. For 55540/55540 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 11809 event pairs, 267 based on Foata normal form. 1/2110 useless extension candidates. Maximal degree in co-relation 13157. Up to 1737 conditions per place. [2024-06-03 20:47:01,452 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 101 changer transitions 0/254 dead transitions. [2024-06-03 20:47:01,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 254 transitions, 3536 flow [2024-06-03 20:47:01,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:01,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:01,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-03 20:47:01,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-03 20:47:01,453 INFO L175 Difference]: Start difference. First operand has 195 places, 228 transitions, 2827 flow. Second operand 8 states and 179 transitions. [2024-06-03 20:47:01,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 254 transitions, 3536 flow [2024-06-03 20:47:01,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 254 transitions, 3396 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:01,631 INFO L231 Difference]: Finished difference. Result has 197 places, 231 transitions, 2961 flow [2024-06-03 20:47:01,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2689, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2961, PETRI_PLACES=197, PETRI_TRANSITIONS=231} [2024-06-03 20:47:01,631 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-03 20:47:01,632 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 231 transitions, 2961 flow [2024-06-03 20:47:01,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:01,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:01,632 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] [2024-06-03 20:47:01,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:47:01,632 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:01,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:01,632 INFO L85 PathProgramCache]: Analyzing trace with hash -722978723, now seen corresponding path program 12 times [2024-06-03 20:47:01,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:01,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536260140] [2024-06-03 20:47:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:01,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:01,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:01,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536260140] [2024-06-03 20:47:01,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536260140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:01,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:01,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:01,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22351983] [2024-06-03 20:47:01,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:01,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:01,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:01,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:01,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:01,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:01,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 231 transitions, 2961 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:01,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:01,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:01,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:02,243 INFO L124 PetriNetUnfolderBase]: 1247/2121 cut-off events. [2024-06-03 20:47:02,243 INFO L125 PetriNetUnfolderBase]: For 56075/56075 co-relation queries the response was YES. [2024-06-03 20:47:02,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13411 conditions, 2121 events. 1247/2121 cut-off events. For 56075/56075 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11899 event pairs, 266 based on Foata normal form. 1/2119 useless extension candidates. Maximal degree in co-relation 13318. Up to 1743 conditions per place. [2024-06-03 20:47:02,261 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 108 changer transitions 0/261 dead transitions. [2024-06-03 20:47:02,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 261 transitions, 3698 flow [2024-06-03 20:47:02,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:47:02,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:47:02,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-03 20:47:02,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-03 20:47:02,262 INFO L175 Difference]: Start difference. First operand has 197 places, 231 transitions, 2961 flow. Second operand 12 states and 248 transitions. [2024-06-03 20:47:02,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 261 transitions, 3698 flow [2024-06-03 20:47:02,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 261 transitions, 3506 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:02,445 INFO L231 Difference]: Finished difference. Result has 204 places, 234 transitions, 3061 flow [2024-06-03 20:47:02,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3061, PETRI_PLACES=204, PETRI_TRANSITIONS=234} [2024-06-03 20:47:02,445 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-03 20:47:02,445 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 234 transitions, 3061 flow [2024-06-03 20:47:02,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:02,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:02,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:02,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:47:02,446 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:02,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:02,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1278432907, now seen corresponding path program 13 times [2024-06-03 20:47:02,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:02,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597262244] [2024-06-03 20:47:02,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:02,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:02,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:02,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:02,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597262244] [2024-06-03 20:47:02,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597262244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:02,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:02,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:02,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411312628] [2024-06-03 20:47:02,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:02,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:02,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:02,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:02,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:02,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:02,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 234 transitions, 3061 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:02,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:02,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:02,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:03,016 INFO L124 PetriNetUnfolderBase]: 1244/2117 cut-off events. [2024-06-03 20:47:03,016 INFO L125 PetriNetUnfolderBase]: For 57339/57339 co-relation queries the response was YES. [2024-06-03 20:47:03,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13365 conditions, 2117 events. 1244/2117 cut-off events. For 57339/57339 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11875 event pairs, 266 based on Foata normal form. 1/2115 useless extension candidates. Maximal degree in co-relation 13271. Up to 1740 conditions per place. [2024-06-03 20:47:03,035 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 146 selfloop transitions, 107 changer transitions 0/259 dead transitions. [2024-06-03 20:47:03,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 259 transitions, 3632 flow [2024-06-03 20:47:03,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:03,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-03 20:47:03,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204545454545455 [2024-06-03 20:47:03,036 INFO L175 Difference]: Start difference. First operand has 204 places, 234 transitions, 3061 flow. Second operand 11 states and 229 transitions. [2024-06-03 20:47:03,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 259 transitions, 3632 flow [2024-06-03 20:47:03,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 259 transitions, 3245 flow, removed 50 selfloop flow, removed 10 redundant places. [2024-06-03 20:47:03,224 INFO L231 Difference]: Finished difference. Result has 205 places, 234 transitions, 2894 flow [2024-06-03 20:47:03,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2674, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2894, PETRI_PLACES=205, PETRI_TRANSITIONS=234} [2024-06-03 20:47:03,224 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-03 20:47:03,224 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 234 transitions, 2894 flow [2024-06-03 20:47:03,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:03,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:03,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:03,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:47:03,225 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:03,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:03,225 INFO L85 PathProgramCache]: Analyzing trace with hash 748023141, now seen corresponding path program 1 times [2024-06-03 20:47:03,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:03,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014004890] [2024-06-03 20:47:03,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:03,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:03,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:03,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:03,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:03,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014004890] [2024-06-03 20:47:03,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014004890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:03,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:03,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:03,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799706098] [2024-06-03 20:47:03,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:03,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:03,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:03,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:03,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:03,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:03,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 234 transitions, 2894 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:03,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:03,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:03,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:03,830 INFO L124 PetriNetUnfolderBase]: 1343/2267 cut-off events. [2024-06-03 20:47:03,830 INFO L125 PetriNetUnfolderBase]: For 79564/79567 co-relation queries the response was YES. [2024-06-03 20:47:03,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14657 conditions, 2267 events. 1343/2267 cut-off events. For 79564/79567 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12837 event pairs, 181 based on Foata normal form. 6/2266 useless extension candidates. Maximal degree in co-relation 14563. Up to 1474 conditions per place. [2024-06-03 20:47:03,849 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 202 selfloop transitions, 61 changer transitions 0/269 dead transitions. [2024-06-03 20:47:03,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 269 transitions, 3806 flow [2024-06-03 20:47:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:03,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:03,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 20:47:03,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964285714285714 [2024-06-03 20:47:03,850 INFO L175 Difference]: Start difference. First operand has 205 places, 234 transitions, 2894 flow. Second operand 7 states and 167 transitions. [2024-06-03 20:47:03,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 269 transitions, 3806 flow [2024-06-03 20:47:04,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 269 transitions, 3516 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-03 20:47:04,116 INFO L231 Difference]: Finished difference. Result has 201 places, 237 transitions, 2780 flow [2024-06-03 20:47:04,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2604, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2780, PETRI_PLACES=201, PETRI_TRANSITIONS=237} [2024-06-03 20:47:04,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-03 20:47:04,117 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 237 transitions, 2780 flow [2024-06-03 20:47:04,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:04,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:04,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:04,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:47:04,117 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:04,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:04,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1242709743, now seen corresponding path program 2 times [2024-06-03 20:47:04,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:04,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367320798] [2024-06-03 20:47:04,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:04,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:04,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:04,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367320798] [2024-06-03 20:47:04,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367320798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:04,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:04,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:04,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167249184] [2024-06-03 20:47:04,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:04,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:04,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:04,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:04,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:04,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:04,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 237 transitions, 2780 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:04,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:04,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:04,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:04,745 INFO L124 PetriNetUnfolderBase]: 1330/2254 cut-off events. [2024-06-03 20:47:04,745 INFO L125 PetriNetUnfolderBase]: For 74713/74716 co-relation queries the response was YES. [2024-06-03 20:47:04,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14351 conditions, 2254 events. 1330/2254 cut-off events. For 74713/74716 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 12751 event pairs, 248 based on Foata normal form. 6/2253 useless extension candidates. Maximal degree in co-relation 14256. Up to 1952 conditions per place. [2024-06-03 20:47:04,762 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 231 selfloop transitions, 18 changer transitions 0/255 dead transitions. [2024-06-03 20:47:04,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 255 transitions, 3340 flow [2024-06-03 20:47:04,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-03 20:47:04,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-03 20:47:04,763 INFO L175 Difference]: Start difference. First operand has 201 places, 237 transitions, 2780 flow. Second operand 6 states and 132 transitions. [2024-06-03 20:47:04,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 255 transitions, 3340 flow [2024-06-03 20:47:04,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 255 transitions, 3277 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-03 20:47:04,977 INFO L231 Difference]: Finished difference. Result has 205 places, 237 transitions, 2757 flow [2024-06-03 20:47:04,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2757, PETRI_PLACES=205, PETRI_TRANSITIONS=237} [2024-06-03 20:47:04,978 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-03 20:47:04,978 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 237 transitions, 2757 flow [2024-06-03 20:47:04,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:04,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:04,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:04,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:47:04,978 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:04,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:04,979 INFO L85 PathProgramCache]: Analyzing trace with hash -661500233, now seen corresponding path program 3 times [2024-06-03 20:47:04,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:04,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791348466] [2024-06-03 20:47:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:04,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:04,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:05,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:05,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791348466] [2024-06-03 20:47:05,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791348466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:05,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:05,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:05,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827977846] [2024-06-03 20:47:05,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:05,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:05,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:05,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:05,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:05,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:05,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 237 transitions, 2757 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:05,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:05,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:05,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:05,560 INFO L124 PetriNetUnfolderBase]: 1358/2298 cut-off events. [2024-06-03 20:47:05,561 INFO L125 PetriNetUnfolderBase]: For 80506/80509 co-relation queries the response was YES. [2024-06-03 20:47:05,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14661 conditions, 2298 events. 1358/2298 cut-off events. For 80506/80509 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 13096 event pairs, 253 based on Foata normal form. 8/2299 useless extension candidates. Maximal degree in co-relation 14564. Up to 1677 conditions per place. [2024-06-03 20:47:05,581 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 200 selfloop transitions, 57 changer transitions 0/263 dead transitions. [2024-06-03 20:47:05,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 263 transitions, 3523 flow [2024-06-03 20:47:05,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:05,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 20:47:05,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-03 20:47:05,582 INFO L175 Difference]: Start difference. First operand has 205 places, 237 transitions, 2757 flow. Second operand 6 states and 146 transitions. [2024-06-03 20:47:05,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 263 transitions, 3523 flow [2024-06-03 20:47:05,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 263 transitions, 3454 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:05,825 INFO L231 Difference]: Finished difference. Result has 205 places, 238 transitions, 2829 flow [2024-06-03 20:47:05,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2829, PETRI_PLACES=205, PETRI_TRANSITIONS=238} [2024-06-03 20:47:05,825 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 164 predicate places. [2024-06-03 20:47:05,825 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 238 transitions, 2829 flow [2024-06-03 20:47:05,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:05,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:05,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:05,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:47:05,826 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:05,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:05,826 INFO L85 PathProgramCache]: Analyzing trace with hash -653881673, now seen corresponding path program 4 times [2024-06-03 20:47:05,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:05,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119650113] [2024-06-03 20:47:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:05,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:06,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:06,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119650113] [2024-06-03 20:47:06,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119650113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:06,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:06,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:06,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308163779] [2024-06-03 20:47:06,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:06,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:06,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:06,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:06,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:06,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:06,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 238 transitions, 2829 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:06,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:06,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:06,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:06,422 INFO L124 PetriNetUnfolderBase]: 1340/2270 cut-off events. [2024-06-03 20:47:06,422 INFO L125 PetriNetUnfolderBase]: For 74627/74630 co-relation queries the response was YES. [2024-06-03 20:47:06,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14266 conditions, 2270 events. 1340/2270 cut-off events. For 74627/74630 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 12916 event pairs, 314 based on Foata normal form. 8/2269 useless extension candidates. Maximal degree in co-relation 14168. Up to 1926 conditions per place. [2024-06-03 20:47:06,442 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 200 selfloop transitions, 49 changer transitions 0/255 dead transitions. [2024-06-03 20:47:06,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 255 transitions, 3407 flow [2024-06-03 20:47:06,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:06,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:06,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-03 20:47:06,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-03 20:47:06,443 INFO L175 Difference]: Start difference. First operand has 205 places, 238 transitions, 2829 flow. Second operand 6 states and 139 transitions. [2024-06-03 20:47:06,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 255 transitions, 3407 flow [2024-06-03 20:47:06,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 255 transitions, 3280 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:06,675 INFO L231 Difference]: Finished difference. Result has 206 places, 238 transitions, 2811 flow [2024-06-03 20:47:06,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2811, PETRI_PLACES=206, PETRI_TRANSITIONS=238} [2024-06-03 20:47:06,675 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-03 20:47:06,676 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 238 transitions, 2811 flow [2024-06-03 20:47:06,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:06,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:06,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:06,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:47:06,676 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:06,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:06,676 INFO L85 PathProgramCache]: Analyzing trace with hash 599188569, now seen corresponding path program 5 times [2024-06-03 20:47:06,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:06,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344608111] [2024-06-03 20:47:06,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:06,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:06,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:06,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:06,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344608111] [2024-06-03 20:47:06,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344608111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:06,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:06,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:06,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234952496] [2024-06-03 20:47:06,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:06,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:06,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:06,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:06,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:06,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:06,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 238 transitions, 2811 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:06,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:06,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:06,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:07,251 INFO L124 PetriNetUnfolderBase]: 1401/2367 cut-off events. [2024-06-03 20:47:07,251 INFO L125 PetriNetUnfolderBase]: For 82150/82153 co-relation queries the response was YES. [2024-06-03 20:47:07,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15030 conditions, 2367 events. 1401/2367 cut-off events. For 82150/82153 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 13544 event pairs, 325 based on Foata normal form. 8/2368 useless extension candidates. Maximal degree in co-relation 14932. Up to 1829 conditions per place. [2024-06-03 20:47:07,275 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 203 selfloop transitions, 60 changer transitions 0/269 dead transitions. [2024-06-03 20:47:07,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 269 transitions, 3615 flow [2024-06-03 20:47:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:07,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:47:07,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-03 20:47:07,276 INFO L175 Difference]: Start difference. First operand has 206 places, 238 transitions, 2811 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:47:07,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 269 transitions, 3615 flow [2024-06-03 20:47:07,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 269 transitions, 3459 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:07,498 INFO L231 Difference]: Finished difference. Result has 206 places, 240 transitions, 2815 flow [2024-06-03 20:47:07,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2657, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2815, PETRI_PLACES=206, PETRI_TRANSITIONS=240} [2024-06-03 20:47:07,498 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-03 20:47:07,498 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 240 transitions, 2815 flow [2024-06-03 20:47:07,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:07,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:07,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:07,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:47:07,499 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:07,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:07,499 INFO L85 PathProgramCache]: Analyzing trace with hash 606807129, now seen corresponding path program 6 times [2024-06-03 20:47:07,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:07,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953162233] [2024-06-03 20:47:07,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:07,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:07,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:07,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:07,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953162233] [2024-06-03 20:47:07,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953162233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:07,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:07,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:07,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160576901] [2024-06-03 20:47:07,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:07,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:07,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:07,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:07,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:07,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:07,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 240 transitions, 2815 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:07,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:07,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:07,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:08,074 INFO L124 PetriNetUnfolderBase]: 1429/2411 cut-off events. [2024-06-03 20:47:08,074 INFO L125 PetriNetUnfolderBase]: For 82646/82649 co-relation queries the response was YES. [2024-06-03 20:47:08,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15230 conditions, 2411 events. 1429/2411 cut-off events. For 82646/82649 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 13875 event pairs, 345 based on Foata normal form. 8/2412 useless extension candidates. Maximal degree in co-relation 15133. Up to 2049 conditions per place. [2024-06-03 20:47:08,096 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 196 selfloop transitions, 60 changer transitions 0/262 dead transitions. [2024-06-03 20:47:08,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 262 transitions, 3435 flow [2024-06-03 20:47:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:08,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:08,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-03 20:47:08,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-03 20:47:08,098 INFO L175 Difference]: Start difference. First operand has 206 places, 240 transitions, 2815 flow. Second operand 7 states and 156 transitions. [2024-06-03 20:47:08,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 262 transitions, 3435 flow [2024-06-03 20:47:08,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 262 transitions, 3352 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 20:47:08,321 INFO L231 Difference]: Finished difference. Result has 210 places, 241 transitions, 2877 flow [2024-06-03 20:47:08,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2877, PETRI_PLACES=210, PETRI_TRANSITIONS=241} [2024-06-03 20:47:08,322 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 169 predicate places. [2024-06-03 20:47:08,322 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 241 transitions, 2877 flow [2024-06-03 20:47:08,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:08,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:08,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:08,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:47:08,322 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:08,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:08,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1110770859, now seen corresponding path program 7 times [2024-06-03 20:47:08,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:08,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936203975] [2024-06-03 20:47:08,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:08,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:08,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:08,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:08,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:08,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936203975] [2024-06-03 20:47:08,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936203975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:08,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:08,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:08,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674934836] [2024-06-03 20:47:08,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:08,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:08,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:08,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:08,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:08,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:08,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 241 transitions, 2877 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:08,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:08,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:08,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:08,906 INFO L124 PetriNetUnfolderBase]: 1457/2455 cut-off events. [2024-06-03 20:47:08,906 INFO L125 PetriNetUnfolderBase]: For 85409/85412 co-relation queries the response was YES. [2024-06-03 20:47:08,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15613 conditions, 2455 events. 1457/2455 cut-off events. For 85409/85412 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 14185 event pairs, 349 based on Foata normal form. 8/2456 useless extension candidates. Maximal degree in co-relation 15514. Up to 2093 conditions per place. [2024-06-03 20:47:08,928 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 194 selfloop transitions, 60 changer transitions 0/260 dead transitions. [2024-06-03 20:47:08,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 260 transitions, 3483 flow [2024-06-03 20:47:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 20:47:08,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-03 20:47:08,930 INFO L175 Difference]: Start difference. First operand has 210 places, 241 transitions, 2877 flow. Second operand 7 states and 154 transitions. [2024-06-03 20:47:08,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 260 transitions, 3483 flow [2024-06-03 20:47:09,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 260 transitions, 3364 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:09,212 INFO L231 Difference]: Finished difference. Result has 212 places, 242 transitions, 2901 flow [2024-06-03 20:47:09,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2758, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2901, PETRI_PLACES=212, PETRI_TRANSITIONS=242} [2024-06-03 20:47:09,213 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 171 predicate places. [2024-06-03 20:47:09,213 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 242 transitions, 2901 flow [2024-06-03 20:47:09,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:09,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:09,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:09,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:47:09,213 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:09,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:09,214 INFO L85 PathProgramCache]: Analyzing trace with hash -896105549, now seen corresponding path program 8 times [2024-06-03 20:47:09,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:09,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504214009] [2024-06-03 20:47:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:09,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:09,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:09,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504214009] [2024-06-03 20:47:09,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504214009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:09,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:09,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:09,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144319053] [2024-06-03 20:47:09,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:09,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:09,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:09,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:09,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:09,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:09,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 242 transitions, 2901 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:09,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:09,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:09,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:09,823 INFO L124 PetriNetUnfolderBase]: 1439/2429 cut-off events. [2024-06-03 20:47:09,823 INFO L125 PetriNetUnfolderBase]: For 78886/78889 co-relation queries the response was YES. [2024-06-03 20:47:09,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15120 conditions, 2429 events. 1439/2429 cut-off events. For 78886/78889 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14043 event pairs, 329 based on Foata normal form. 8/2430 useless extension candidates. Maximal degree in co-relation 15020. Up to 1985 conditions per place. [2024-06-03 20:47:09,846 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 211 selfloop transitions, 48 changer transitions 0/265 dead transitions. [2024-06-03 20:47:09,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 265 transitions, 3515 flow [2024-06-03 20:47:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 20:47:09,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-03 20:47:09,847 INFO L175 Difference]: Start difference. First operand has 212 places, 242 transitions, 2901 flow. Second operand 6 states and 143 transitions. [2024-06-03 20:47:09,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 265 transitions, 3515 flow [2024-06-03 20:47:10,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 265 transitions, 3392 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:10,085 INFO L231 Difference]: Finished difference. Result has 213 places, 242 transitions, 2886 flow [2024-06-03 20:47:10,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2778, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2886, PETRI_PLACES=213, PETRI_TRANSITIONS=242} [2024-06-03 20:47:10,086 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-03 20:47:10,086 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 242 transitions, 2886 flow [2024-06-03 20:47:10,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:10,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:10,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:10,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:47:10,086 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:10,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:10,087 INFO L85 PathProgramCache]: Analyzing trace with hash 776445019, now seen corresponding path program 1 times [2024-06-03 20:47:10,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:10,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76323560] [2024-06-03 20:47:10,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:10,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:10,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:10,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76323560] [2024-06-03 20:47:10,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76323560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:10,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:10,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:10,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128145456] [2024-06-03 20:47:10,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:10,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:10,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:10,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:10,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:10,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:10,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 242 transitions, 2886 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:10,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:10,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:10,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:10,693 INFO L124 PetriNetUnfolderBase]: 1459/2465 cut-off events. [2024-06-03 20:47:10,694 INFO L125 PetriNetUnfolderBase]: For 78502/78505 co-relation queries the response was YES. [2024-06-03 20:47:10,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15349 conditions, 2465 events. 1459/2465 cut-off events. For 78502/78505 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 14279 event pairs, 273 based on Foata normal form. 6/2464 useless extension candidates. Maximal degree in co-relation 15248. Up to 1432 conditions per place. [2024-06-03 20:47:10,716 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 197 selfloop transitions, 71 changer transitions 0/274 dead transitions. [2024-06-03 20:47:10,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 274 transitions, 3696 flow [2024-06-03 20:47:10,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:47:10,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-03 20:47:10,717 INFO L175 Difference]: Start difference. First operand has 213 places, 242 transitions, 2886 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:47:10,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 274 transitions, 3696 flow [2024-06-03 20:47:10,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 274 transitions, 3581 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:10,972 INFO L231 Difference]: Finished difference. Result has 214 places, 243 transitions, 2937 flow [2024-06-03 20:47:10,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2937, PETRI_PLACES=214, PETRI_TRANSITIONS=243} [2024-06-03 20:47:10,973 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 173 predicate places. [2024-06-03 20:47:10,973 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 243 transitions, 2937 flow [2024-06-03 20:47:10,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:10,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:10,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:10,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:47:10,974 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:10,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:10,974 INFO L85 PathProgramCache]: Analyzing trace with hash 776713789, now seen corresponding path program 2 times [2024-06-03 20:47:10,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:10,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255166273] [2024-06-03 20:47:10,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:10,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:11,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:11,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255166273] [2024-06-03 20:47:11,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255166273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:11,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:11,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:11,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183772196] [2024-06-03 20:47:11,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:11,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:11,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:11,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:11,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:11,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:11,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 243 transitions, 2937 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:11,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:11,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:11,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:11,552 INFO L124 PetriNetUnfolderBase]: 1479/2501 cut-off events. [2024-06-03 20:47:11,552 INFO L125 PetriNetUnfolderBase]: For 78988/78991 co-relation queries the response was YES. [2024-06-03 20:47:11,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15693 conditions, 2501 events. 1479/2501 cut-off events. For 78988/78991 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 14525 event pairs, 261 based on Foata normal form. 6/2500 useless extension candidates. Maximal degree in co-relation 15592. Up to 1444 conditions per place. [2024-06-03 20:47:11,575 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 194 selfloop transitions, 73 changer transitions 0/273 dead transitions. [2024-06-03 20:47:11,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 273 transitions, 3761 flow [2024-06-03 20:47:11,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:11,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:11,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:47:11,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-03 20:47:11,576 INFO L175 Difference]: Start difference. First operand has 214 places, 243 transitions, 2937 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:47:11,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 273 transitions, 3761 flow [2024-06-03 20:47:11,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 273 transitions, 3533 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:11,838 INFO L231 Difference]: Finished difference. Result has 215 places, 244 transitions, 2879 flow [2024-06-03 20:47:11,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2879, PETRI_PLACES=215, PETRI_TRANSITIONS=244} [2024-06-03 20:47:11,839 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 174 predicate places. [2024-06-03 20:47:11,839 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 244 transitions, 2879 flow [2024-06-03 20:47:11,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:11,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:11,839 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] [2024-06-03 20:47:11,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:47:11,839 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:11,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:11,839 INFO L85 PathProgramCache]: Analyzing trace with hash 776714130, now seen corresponding path program 1 times [2024-06-03 20:47:11,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:11,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984729209] [2024-06-03 20:47:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:11,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:12,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:12,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984729209] [2024-06-03 20:47:12,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984729209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:12,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:12,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:12,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247373730] [2024-06-03 20:47:12,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:12,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:12,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:12,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:12,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:12,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:12,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 244 transitions, 2879 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:12,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:12,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:12,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:12,472 INFO L124 PetriNetUnfolderBase]: 1586/2681 cut-off events. [2024-06-03 20:47:12,472 INFO L125 PetriNetUnfolderBase]: For 93057/93063 co-relation queries the response was YES. [2024-06-03 20:47:12,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16718 conditions, 2681 events. 1586/2681 cut-off events. For 93057/93063 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15806 event pairs, 312 based on Foata normal form. 10/2686 useless extension candidates. Maximal degree in co-relation 16618. Up to 2016 conditions per place. [2024-06-03 20:47:12,497 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 197 selfloop transitions, 79 changer transitions 0/282 dead transitions. [2024-06-03 20:47:12,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 282 transitions, 3780 flow [2024-06-03 20:47:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-03 20:47:12,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-03 20:47:12,498 INFO L175 Difference]: Start difference. First operand has 215 places, 244 transitions, 2879 flow. Second operand 9 states and 196 transitions. [2024-06-03 20:47:12,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 282 transitions, 3780 flow [2024-06-03 20:47:12,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 282 transitions, 3670 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 20:47:12,863 INFO L231 Difference]: Finished difference. Result has 222 places, 252 transitions, 3096 flow [2024-06-03 20:47:12,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2775, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3096, PETRI_PLACES=222, PETRI_TRANSITIONS=252} [2024-06-03 20:47:12,864 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-03 20:47:12,864 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 252 transitions, 3096 flow [2024-06-03 20:47:12,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:12,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:12,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:12,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:47:12,864 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:12,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:12,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1110586409, now seen corresponding path program 3 times [2024-06-03 20:47:12,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:12,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767144390] [2024-06-03 20:47:12,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:12,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:13,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:13,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:13,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767144390] [2024-06-03 20:47:13,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767144390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:13,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:13,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:13,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575716923] [2024-06-03 20:47:13,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:13,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:13,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:13,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:13,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:13,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:13,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 252 transitions, 3096 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:13,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:13,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:13,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:13,457 INFO L124 PetriNetUnfolderBase]: 1606/2710 cut-off events. [2024-06-03 20:47:13,458 INFO L125 PetriNetUnfolderBase]: For 97103/97106 co-relation queries the response was YES. [2024-06-03 20:47:13,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17182 conditions, 2710 events. 1606/2710 cut-off events. For 97103/97106 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15984 event pairs, 382 based on Foata normal form. 6/2705 useless extension candidates. Maximal degree in co-relation 17079. Up to 2214 conditions per place. [2024-06-03 20:47:13,485 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 203 selfloop transitions, 65 changer transitions 0/274 dead transitions. [2024-06-03 20:47:13,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 274 transitions, 3754 flow [2024-06-03 20:47:13,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 20:47:13,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2024-06-03 20:47:13,486 INFO L175 Difference]: Start difference. First operand has 222 places, 252 transitions, 3096 flow. Second operand 7 states and 157 transitions. [2024-06-03 20:47:13,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 274 transitions, 3754 flow [2024-06-03 20:47:13,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 274 transitions, 3660 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:13,840 INFO L231 Difference]: Finished difference. Result has 224 places, 253 transitions, 3153 flow [2024-06-03 20:47:13,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3002, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3153, PETRI_PLACES=224, PETRI_TRANSITIONS=253} [2024-06-03 20:47:13,840 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-03 20:47:13,840 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 253 transitions, 3153 flow [2024-06-03 20:47:13,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:13,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:13,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:13,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:47:13,841 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:13,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:13,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1110586068, now seen corresponding path program 2 times [2024-06-03 20:47:13,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:13,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717018003] [2024-06-03 20:47:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:13,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:14,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:14,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:14,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717018003] [2024-06-03 20:47:14,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717018003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:14,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:14,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:14,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090201829] [2024-06-03 20:47:14,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:14,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:14,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:14,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:14,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:14,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:14,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 253 transitions, 3153 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:14,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:14,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:14,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:14,533 INFO L124 PetriNetUnfolderBase]: 1672/2817 cut-off events. [2024-06-03 20:47:14,533 INFO L125 PetriNetUnfolderBase]: For 110109/110115 co-relation queries the response was YES. [2024-06-03 20:47:14,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18378 conditions, 2817 events. 1672/2817 cut-off events. For 110109/110115 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 16686 event pairs, 384 based on Foata normal form. 10/2822 useless extension candidates. Maximal degree in co-relation 18274. Up to 2353 conditions per place. [2024-06-03 20:47:14,561 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 204 selfloop transitions, 71 changer transitions 0/281 dead transitions. [2024-06-03 20:47:14,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 281 transitions, 3966 flow [2024-06-03 20:47:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:14,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-03 20:47:14,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-03 20:47:14,562 INFO L175 Difference]: Start difference. First operand has 224 places, 253 transitions, 3153 flow. Second operand 10 states and 210 transitions. [2024-06-03 20:47:14,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 281 transitions, 3966 flow [2024-06-03 20:47:15,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 281 transitions, 3835 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:15,015 INFO L231 Difference]: Finished difference. Result has 230 places, 256 transitions, 3236 flow [2024-06-03 20:47:15,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3024, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3236, PETRI_PLACES=230, PETRI_TRANSITIONS=256} [2024-06-03 20:47:15,016 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-03 20:47:15,016 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 256 transitions, 3236 flow [2024-06-03 20:47:15,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:15,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:15,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:15,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:47:15,016 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:15,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:15,017 INFO L85 PathProgramCache]: Analyzing trace with hash 865427760, now seen corresponding path program 3 times [2024-06-03 20:47:15,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:15,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412685351] [2024-06-03 20:47:15,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:15,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:15,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:15,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:15,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412685351] [2024-06-03 20:47:15,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412685351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:15,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:15,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:15,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589614180] [2024-06-03 20:47:15,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:15,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:15,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:15,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:15,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:15,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:15,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 256 transitions, 3236 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:15,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:15,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:15,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:15,693 INFO L124 PetriNetUnfolderBase]: 1654/2793 cut-off events. [2024-06-03 20:47:15,693 INFO L125 PetriNetUnfolderBase]: For 104409/104415 co-relation queries the response was YES. [2024-06-03 20:47:15,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17931 conditions, 2793 events. 1654/2793 cut-off events. For 104409/104415 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 16612 event pairs, 392 based on Foata normal form. 12/2800 useless extension candidates. Maximal degree in co-relation 17825. Up to 2407 conditions per place. [2024-06-03 20:47:15,719 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 205 selfloop transitions, 65 changer transitions 0/276 dead transitions. [2024-06-03 20:47:15,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 276 transitions, 3858 flow [2024-06-03 20:47:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:15,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:15,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-03 20:47:15,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-03 20:47:15,720 INFO L175 Difference]: Start difference. First operand has 230 places, 256 transitions, 3236 flow. Second operand 9 states and 189 transitions. [2024-06-03 20:47:15,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 276 transitions, 3858 flow [2024-06-03 20:47:16,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 276 transitions, 3760 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:16,043 INFO L231 Difference]: Finished difference. Result has 232 places, 256 transitions, 3278 flow [2024-06-03 20:47:16,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3278, PETRI_PLACES=232, PETRI_TRANSITIONS=256} [2024-06-03 20:47:16,044 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-03 20:47:16,044 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 256 transitions, 3278 flow [2024-06-03 20:47:16,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:16,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:16,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:16,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:47:16,045 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:16,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:16,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1653539536, now seen corresponding path program 4 times [2024-06-03 20:47:16,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:16,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114314868] [2024-06-03 20:47:16,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:16,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:16,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:16,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114314868] [2024-06-03 20:47:16,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114314868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:16,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:16,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:16,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497363489] [2024-06-03 20:47:16,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:16,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:16,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:16,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:16,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:16,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:16,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 256 transitions, 3278 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:16,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:16,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:16,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:16,777 INFO L124 PetriNetUnfolderBase]: 1758/2966 cut-off events. [2024-06-03 20:47:16,778 INFO L125 PetriNetUnfolderBase]: For 145313/145316 co-relation queries the response was YES. [2024-06-03 20:47:16,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19020 conditions, 2966 events. 1758/2966 cut-off events. For 145313/145316 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 17839 event pairs, 442 based on Foata normal form. 34/2993 useless extension candidates. Maximal degree in co-relation 18913. Up to 2441 conditions per place. [2024-06-03 20:47:16,806 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 212 selfloop transitions, 53 changer transitions 6/277 dead transitions. [2024-06-03 20:47:16,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 277 transitions, 3941 flow [2024-06-03 20:47:16,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:16,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-03 20:47:16,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:47:16,807 INFO L175 Difference]: Start difference. First operand has 232 places, 256 transitions, 3278 flow. Second operand 7 states and 160 transitions. [2024-06-03 20:47:16,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 277 transitions, 3941 flow [2024-06-03 20:47:17,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 277 transitions, 3817 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:17,182 INFO L231 Difference]: Finished difference. Result has 232 places, 253 transitions, 3246 flow [2024-06-03 20:47:17,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3154, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3246, PETRI_PLACES=232, PETRI_TRANSITIONS=253} [2024-06-03 20:47:17,182 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 191 predicate places. [2024-06-03 20:47:17,183 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 253 transitions, 3246 flow [2024-06-03 20:47:17,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:17,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:17,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:17,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:47:17,183 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:17,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:17,184 INFO L85 PathProgramCache]: Analyzing trace with hash -895920758, now seen corresponding path program 5 times [2024-06-03 20:47:17,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:17,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114284856] [2024-06-03 20:47:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:17,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:17,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:17,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:17,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114284856] [2024-06-03 20:47:17,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114284856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:17,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:17,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:17,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360300234] [2024-06-03 20:47:17,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:17,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:17,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:17,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:17,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:17,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:17,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 253 transitions, 3246 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:17,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:17,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:17,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:18,011 INFO L124 PetriNetUnfolderBase]: 1961/3305 cut-off events. [2024-06-03 20:47:18,011 INFO L125 PetriNetUnfolderBase]: For 197789/197792 co-relation queries the response was YES. [2024-06-03 20:47:18,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22907 conditions, 3305 events. 1961/3305 cut-off events. For 197789/197792 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20246 event pairs, 398 based on Foata normal form. 30/3328 useless extension candidates. Maximal degree in co-relation 22799. Up to 2258 conditions per place. [2024-06-03 20:47:18,045 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 216 selfloop transitions, 60 changer transitions 7/289 dead transitions. [2024-06-03 20:47:18,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 289 transitions, 4208 flow [2024-06-03 20:47:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:18,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:47:18,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-03 20:47:18,046 INFO L175 Difference]: Start difference. First operand has 232 places, 253 transitions, 3246 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:47:18,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 289 transitions, 4208 flow [2024-06-03 20:47:18,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 289 transitions, 4100 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:18,499 INFO L231 Difference]: Finished difference. Result has 235 places, 255 transitions, 3346 flow [2024-06-03 20:47:18,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3138, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3346, PETRI_PLACES=235, PETRI_TRANSITIONS=255} [2024-06-03 20:47:18,500 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-03 20:47:18,500 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 255 transitions, 3346 flow [2024-06-03 20:47:18,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:18,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:18,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:18,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:47:18,500 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:18,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:18,500 INFO L85 PathProgramCache]: Analyzing trace with hash -890410508, now seen corresponding path program 6 times [2024-06-03 20:47:18,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:18,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594762851] [2024-06-03 20:47:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:18,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:18,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:18,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594762851] [2024-06-03 20:47:18,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594762851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:18,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:18,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:18,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640899813] [2024-06-03 20:47:18,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:18,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:18,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:18,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:18,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:18,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:18,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 255 transitions, 3346 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:18,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:18,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:18,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:19,209 INFO L124 PetriNetUnfolderBase]: 1791/3017 cut-off events. [2024-06-03 20:47:19,209 INFO L125 PetriNetUnfolderBase]: For 156370/156373 co-relation queries the response was YES. [2024-06-03 20:47:19,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19825 conditions, 3017 events. 1791/3017 cut-off events. For 156370/156373 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 18122 event pairs, 446 based on Foata normal form. 34/3044 useless extension candidates. Maximal degree in co-relation 19715. Up to 2502 conditions per place. [2024-06-03 20:47:19,237 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 218 selfloop transitions, 46 changer transitions 6/276 dead transitions. [2024-06-03 20:47:19,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 276 transitions, 3990 flow [2024-06-03 20:47:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:19,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 20:47:19,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.553125 [2024-06-03 20:47:19,238 INFO L175 Difference]: Start difference. First operand has 235 places, 255 transitions, 3346 flow. Second operand 8 states and 177 transitions. [2024-06-03 20:47:19,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 276 transitions, 3990 flow [2024-06-03 20:47:19,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 276 transitions, 3866 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:19,615 INFO L231 Difference]: Finished difference. Result has 237 places, 251 transitions, 3279 flow [2024-06-03 20:47:19,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3279, PETRI_PLACES=237, PETRI_TRANSITIONS=251} [2024-06-03 20:47:19,615 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-03 20:47:19,616 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 251 transitions, 3279 flow [2024-06-03 20:47:19,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:19,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:19,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:19,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:47:19,616 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:19,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:19,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1653687747, now seen corresponding path program 4 times [2024-06-03 20:47:19,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:19,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167706983] [2024-06-03 20:47:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:19,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:19,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:19,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:19,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167706983] [2024-06-03 20:47:19,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167706983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:19,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:19,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:19,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137141047] [2024-06-03 20:47:19,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:19,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:19,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:19,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:19,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:19,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:19,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 251 transitions, 3279 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:19,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:19,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:19,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:20,279 INFO L124 PetriNetUnfolderBase]: 1695/2861 cut-off events. [2024-06-03 20:47:20,279 INFO L125 PetriNetUnfolderBase]: For 99740/99743 co-relation queries the response was YES. [2024-06-03 20:47:20,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18529 conditions, 2861 events. 1695/2861 cut-off events. For 99740/99743 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 17088 event pairs, 284 based on Foata normal form. 6/2860 useless extension candidates. Maximal degree in co-relation 18420. Up to 2080 conditions per place. [2024-06-03 20:47:20,305 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 215 selfloop transitions, 56 changer transitions 0/277 dead transitions. [2024-06-03 20:47:20,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 277 transitions, 3943 flow [2024-06-03 20:47:20,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:20,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:20,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 20:47:20,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-03 20:47:20,306 INFO L175 Difference]: Start difference. First operand has 237 places, 251 transitions, 3279 flow. Second operand 6 states and 146 transitions. [2024-06-03 20:47:20,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 277 transitions, 3943 flow [2024-06-03 20:47:20,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 277 transitions, 3801 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:20,712 INFO L231 Difference]: Finished difference. Result has 236 places, 251 transitions, 3261 flow [2024-06-03 20:47:20,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3261, PETRI_PLACES=236, PETRI_TRANSITIONS=251} [2024-06-03 20:47:20,713 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-03 20:47:20,713 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 251 transitions, 3261 flow [2024-06-03 20:47:20,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:20,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:20,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:20,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:47:20,713 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:20,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:20,713 INFO L85 PathProgramCache]: Analyzing trace with hash -688846586, now seen corresponding path program 1 times [2024-06-03 20:47:20,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:20,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179856823] [2024-06-03 20:47:20,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:20,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:20,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:20,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:20,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179856823] [2024-06-03 20:47:20,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179856823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:20,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:20,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:47:20,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617946155] [2024-06-03 20:47:20,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:20,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:47:20,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:20,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:47:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:47:20,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:20,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 251 transitions, 3261 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:20,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:20,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:20,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:21,422 INFO L124 PetriNetUnfolderBase]: 1803/3063 cut-off events. [2024-06-03 20:47:21,423 INFO L125 PetriNetUnfolderBase]: For 140329/140332 co-relation queries the response was YES. [2024-06-03 20:47:21,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19199 conditions, 3063 events. 1803/3063 cut-off events. For 140329/140332 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 18583 event pairs, 389 based on Foata normal form. 30/3086 useless extension candidates. Maximal degree in co-relation 19089. Up to 2375 conditions per place. [2024-06-03 20:47:21,451 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 51 changer transitions 9/281 dead transitions. [2024-06-03 20:47:21,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 281 transitions, 4020 flow [2024-06-03 20:47:21,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:21,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:21,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-03 20:47:21,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565625 [2024-06-03 20:47:21,452 INFO L175 Difference]: Start difference. First operand has 236 places, 251 transitions, 3261 flow. Second operand 8 states and 181 transitions. [2024-06-03 20:47:21,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 281 transitions, 4020 flow [2024-06-03 20:47:21,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 281 transitions, 3850 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:21,854 INFO L231 Difference]: Finished difference. Result has 238 places, 250 transitions, 3223 flow [2024-06-03 20:47:21,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3091, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3223, PETRI_PLACES=238, PETRI_TRANSITIONS=250} [2024-06-03 20:47:21,854 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-03 20:47:21,855 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 250 transitions, 3223 flow [2024-06-03 20:47:21,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:21,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:21,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:21,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:47:21,855 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:21,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:21,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1706246418, now seen corresponding path program 7 times [2024-06-03 20:47:21,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:21,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687139417] [2024-06-03 20:47:21,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:21,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:21,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:22,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:22,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:22,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687139417] [2024-06-03 20:47:22,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687139417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:22,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:22,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:22,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769411096] [2024-06-03 20:47:22,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:22,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:22,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:22,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:22,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:22,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:22,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 250 transitions, 3223 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:22,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:22,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:22,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:22,621 INFO L124 PetriNetUnfolderBase]: 1786/3017 cut-off events. [2024-06-03 20:47:22,622 INFO L125 PetriNetUnfolderBase]: For 122135/122141 co-relation queries the response was YES. [2024-06-03 20:47:22,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19789 conditions, 3017 events. 1786/3017 cut-off events. For 122135/122141 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 18122 event pairs, 319 based on Foata normal form. 10/3022 useless extension candidates. Maximal degree in co-relation 19678. Up to 2318 conditions per place. [2024-06-03 20:47:22,653 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 212 selfloop transitions, 62 changer transitions 0/280 dead transitions. [2024-06-03 20:47:22,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 280 transitions, 4034 flow [2024-06-03 20:47:22,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:22,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:22,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-03 20:47:22,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-03 20:47:22,654 INFO L175 Difference]: Start difference. First operand has 238 places, 250 transitions, 3223 flow. Second operand 8 states and 176 transitions. [2024-06-03 20:47:22,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 280 transitions, 4034 flow [2024-06-03 20:47:23,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 280 transitions, 3931 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:23,207 INFO L231 Difference]: Finished difference. Result has 239 places, 253 transitions, 3327 flow [2024-06-03 20:47:23,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3122, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3327, PETRI_PLACES=239, PETRI_TRANSITIONS=253} [2024-06-03 20:47:23,208 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 198 predicate places. [2024-06-03 20:47:23,208 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 253 transitions, 3327 flow [2024-06-03 20:47:23,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:23,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:23,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:23,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:47:23,209 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:23,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:23,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1286033452, now seen corresponding path program 8 times [2024-06-03 20:47:23,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:23,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722769341] [2024-06-03 20:47:23,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:23,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:23,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:23,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722769341] [2024-06-03 20:47:23,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722769341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:23,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:23,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:23,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119246839] [2024-06-03 20:47:23,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:23,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:23,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:23,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:23,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:23,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:23,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 253 transitions, 3327 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:23,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:23,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:23,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:23,985 INFO L124 PetriNetUnfolderBase]: 1839/3102 cut-off events. [2024-06-03 20:47:23,985 INFO L125 PetriNetUnfolderBase]: For 133115/133115 co-relation queries the response was YES. [2024-06-03 20:47:24,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20975 conditions, 3102 events. 1839/3102 cut-off events. For 133115/133115 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18727 event pairs, 382 based on Foata normal form. 6/3105 useless extension candidates. Maximal degree in co-relation 20864. Up to 1944 conditions per place. [2024-06-03 20:47:24,017 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 192 selfloop transitions, 99 changer transitions 0/297 dead transitions. [2024-06-03 20:47:24,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 297 transitions, 4228 flow [2024-06-03 20:47:24,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:24,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-03 20:47:24,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 20:47:24,018 INFO L175 Difference]: Start difference. First operand has 239 places, 253 transitions, 3327 flow. Second operand 10 states and 225 transitions. [2024-06-03 20:47:24,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 297 transitions, 4228 flow [2024-06-03 20:47:24,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 297 transitions, 4126 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:24,414 INFO L231 Difference]: Finished difference. Result has 244 places, 255 transitions, 3471 flow [2024-06-03 20:47:24,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3227, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3471, PETRI_PLACES=244, PETRI_TRANSITIONS=255} [2024-06-03 20:47:24,414 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-03 20:47:24,415 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 255 transitions, 3471 flow [2024-06-03 20:47:24,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:24,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:24,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:24,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:47:24,415 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:24,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:24,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1353004214, now seen corresponding path program 9 times [2024-06-03 20:47:24,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:24,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218035563] [2024-06-03 20:47:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:24,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:24,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:24,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:24,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218035563] [2024-06-03 20:47:24,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218035563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:24,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:24,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:24,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9884448] [2024-06-03 20:47:24,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:24,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:24,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:24,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:24,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:24,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:24,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 255 transitions, 3471 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:24,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:24,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:24,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:25,179 INFO L124 PetriNetUnfolderBase]: 1938/3257 cut-off events. [2024-06-03 20:47:25,179 INFO L125 PetriNetUnfolderBase]: For 158715/158715 co-relation queries the response was YES. [2024-06-03 20:47:25,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22991 conditions, 3257 events. 1938/3257 cut-off events. For 158715/158715 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 19806 event pairs, 461 based on Foata normal form. 6/3260 useless extension candidates. Maximal degree in co-relation 22879. Up to 2639 conditions per place. [2024-06-03 20:47:25,213 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 209 selfloop transitions, 83 changer transitions 0/298 dead transitions. [2024-06-03 20:47:25,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 298 transitions, 4503 flow [2024-06-03 20:47:25,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-03 20:47:25,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-06-03 20:47:25,214 INFO L175 Difference]: Start difference. First operand has 244 places, 255 transitions, 3471 flow. Second operand 11 states and 240 transitions. [2024-06-03 20:47:25,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 298 transitions, 4503 flow [2024-06-03 20:47:25,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 298 transitions, 4381 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:25,831 INFO L231 Difference]: Finished difference. Result has 250 places, 258 transitions, 3588 flow [2024-06-03 20:47:25,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3353, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3588, PETRI_PLACES=250, PETRI_TRANSITIONS=258} [2024-06-03 20:47:25,832 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-03 20:47:25,832 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 258 transitions, 3588 flow [2024-06-03 20:47:25,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:25,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:25,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:25,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:47:25,832 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:25,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:25,833 INFO L85 PathProgramCache]: Analyzing trace with hash -772852168, now seen corresponding path program 10 times [2024-06-03 20:47:25,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:25,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096589363] [2024-06-03 20:47:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:26,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:26,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096589363] [2024-06-03 20:47:26,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096589363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:26,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:26,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:26,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277313221] [2024-06-03 20:47:26,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:26,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:26,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:26,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:26,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:26,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:26,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 258 transitions, 3588 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:26,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:26,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:26,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:26,649 INFO L124 PetriNetUnfolderBase]: 1966/3303 cut-off events. [2024-06-03 20:47:26,650 INFO L125 PetriNetUnfolderBase]: For 167070/167070 co-relation queries the response was YES. [2024-06-03 20:47:26,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23517 conditions, 3303 events. 1966/3303 cut-off events. For 167070/167070 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 20121 event pairs, 488 based on Foata normal form. 8/3308 useless extension candidates. Maximal degree in co-relation 23402. Up to 2794 conditions per place. [2024-06-03 20:47:26,686 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 212 selfloop transitions, 79 changer transitions 0/297 dead transitions. [2024-06-03 20:47:26,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 297 transitions, 4467 flow [2024-06-03 20:47:26,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:47:26,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:47:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 252 transitions. [2024-06-03 20:47:26,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-03 20:47:26,687 INFO L175 Difference]: Start difference. First operand has 250 places, 258 transitions, 3588 flow. Second operand 12 states and 252 transitions. [2024-06-03 20:47:26,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 297 transitions, 4467 flow [2024-06-03 20:47:27,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 297 transitions, 4356 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:27,405 INFO L231 Difference]: Finished difference. Result has 256 places, 259 transitions, 3661 flow [2024-06-03 20:47:27,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3481, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3661, PETRI_PLACES=256, PETRI_TRANSITIONS=259} [2024-06-03 20:47:27,405 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-03 20:47:27,405 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 259 transitions, 3661 flow [2024-06-03 20:47:27,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:27,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:27,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:27,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:47:27,406 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:27,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:27,406 INFO L85 PathProgramCache]: Analyzing trace with hash 632867402, now seen corresponding path program 11 times [2024-06-03 20:47:27,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:27,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042403482] [2024-06-03 20:47:27,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:27,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:27,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:27,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042403482] [2024-06-03 20:47:27,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042403482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:27,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:27,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:27,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593239951] [2024-06-03 20:47:27,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:27,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:27,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:27,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:27,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:27,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:27,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 259 transitions, 3661 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:27,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:27,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:27,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:28,214 INFO L124 PetriNetUnfolderBase]: 1948/3277 cut-off events. [2024-06-03 20:47:28,215 INFO L125 PetriNetUnfolderBase]: For 157283/157283 co-relation queries the response was YES. [2024-06-03 20:47:28,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23016 conditions, 3277 events. 1948/3277 cut-off events. For 157283/157283 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 19990 event pairs, 496 based on Foata normal form. 8/3282 useless extension candidates. Maximal degree in co-relation 22899. Up to 2898 conditions per place. [2024-06-03 20:47:28,251 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 210 selfloop transitions, 76 changer transitions 0/292 dead transitions. [2024-06-03 20:47:28,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 292 transitions, 4348 flow [2024-06-03 20:47:28,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:47:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:47:28,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-03 20:47:28,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-03 20:47:28,252 INFO L175 Difference]: Start difference. First operand has 256 places, 259 transitions, 3661 flow. Second operand 12 states and 248 transitions. [2024-06-03 20:47:28,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 292 transitions, 4348 flow [2024-06-03 20:47:28,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 292 transitions, 4170 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-03 20:47:28,938 INFO L231 Difference]: Finished difference. Result has 258 places, 259 transitions, 3640 flow [2024-06-03 20:47:28,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3483, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3640, PETRI_PLACES=258, PETRI_TRANSITIONS=259} [2024-06-03 20:47:28,938 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-03 20:47:28,938 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 259 transitions, 3640 flow [2024-06-03 20:47:28,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:28,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:28,938 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] [2024-06-03 20:47:28,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:47:28,939 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:28,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:28,939 INFO L85 PathProgramCache]: Analyzing trace with hash 497996942, now seen corresponding path program 12 times [2024-06-03 20:47:28,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:28,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176120181] [2024-06-03 20:47:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:28,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:29,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:29,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:29,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176120181] [2024-06-03 20:47:29,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176120181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:29,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:29,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:29,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972519560] [2024-06-03 20:47:29,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:29,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:29,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:29,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:29,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:29,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:29,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 259 transitions, 3640 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:29,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:29,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:29,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:29,751 INFO L124 PetriNetUnfolderBase]: 1935/3258 cut-off events. [2024-06-03 20:47:29,751 INFO L125 PetriNetUnfolderBase]: For 146741/146747 co-relation queries the response was YES. [2024-06-03 20:47:29,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22477 conditions, 3258 events. 1935/3258 cut-off events. For 146741/146747 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 19906 event pairs, 468 based on Foata normal form. 10/3263 useless extension candidates. Maximal degree in co-relation 22359. Up to 2862 conditions per place. [2024-06-03 20:47:29,787 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 230 selfloop transitions, 41 changer transitions 0/277 dead transitions. [2024-06-03 20:47:29,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 277 transitions, 4238 flow [2024-06-03 20:47:29,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 20:47:29,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-03 20:47:29,788 INFO L175 Difference]: Start difference. First operand has 258 places, 259 transitions, 3640 flow. Second operand 7 states and 152 transitions. [2024-06-03 20:47:29,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 277 transitions, 4238 flow [2024-06-03 20:47:30,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 277 transitions, 4072 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-03 20:47:30,485 INFO L231 Difference]: Finished difference. Result has 254 places, 259 transitions, 3564 flow [2024-06-03 20:47:30,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3564, PETRI_PLACES=254, PETRI_TRANSITIONS=259} [2024-06-03 20:47:30,486 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-03 20:47:30,486 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 259 transitions, 3564 flow [2024-06-03 20:47:30,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:30,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:30,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:30,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:47:30,486 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:30,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:30,487 INFO L85 PathProgramCache]: Analyzing trace with hash -572903916, now seen corresponding path program 13 times [2024-06-03 20:47:30,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:30,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463951481] [2024-06-03 20:47:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:30,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:30,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:30,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463951481] [2024-06-03 20:47:30,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463951481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:30,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:30,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:30,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837287211] [2024-06-03 20:47:30,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:30,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:30,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:30,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:30,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:30,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:30,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 259 transitions, 3564 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:30,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:30,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:30,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:31,358 INFO L124 PetriNetUnfolderBase]: 1917/3231 cut-off events. [2024-06-03 20:47:31,358 INFO L125 PetriNetUnfolderBase]: For 138742/138745 co-relation queries the response was YES. [2024-06-03 20:47:31,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21788 conditions, 3231 events. 1917/3231 cut-off events. For 138742/138745 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 19734 event pairs, 498 based on Foata normal form. 8/3232 useless extension candidates. Maximal degree in co-relation 21669. Up to 2807 conditions per place. [2024-06-03 20:47:31,390 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 229 selfloop transitions, 41 changer transitions 0/276 dead transitions. [2024-06-03 20:47:31,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 276 transitions, 4176 flow [2024-06-03 20:47:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:47:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:47:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 20:47:31,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5708333333333333 [2024-06-03 20:47:31,391 INFO L175 Difference]: Start difference. First operand has 254 places, 259 transitions, 3564 flow. Second operand 6 states and 137 transitions. [2024-06-03 20:47:31,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 276 transitions, 4176 flow [2024-06-03 20:47:32,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 276 transitions, 4088 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:32,073 INFO L231 Difference]: Finished difference. Result has 253 places, 259 transitions, 3569 flow [2024-06-03 20:47:32,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3476, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3569, PETRI_PLACES=253, PETRI_TRANSITIONS=259} [2024-06-03 20:47:32,074 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 212 predicate places. [2024-06-03 20:47:32,074 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 259 transitions, 3569 flow [2024-06-03 20:47:32,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:32,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:32,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:32,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:47:32,074 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:32,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:32,075 INFO L85 PathProgramCache]: Analyzing trace with hash 396754284, now seen corresponding path program 14 times [2024-06-03 20:47:32,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:32,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067034004] [2024-06-03 20:47:32,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:32,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:32,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:32,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:32,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067034004] [2024-06-03 20:47:32,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067034004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:32,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:32,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:32,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110436582] [2024-06-03 20:47:32,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:32,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:32,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:32,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:32,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:32,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:32,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 259 transitions, 3569 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:32,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:32,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:32,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:32,899 INFO L124 PetriNetUnfolderBase]: 1904/3212 cut-off events. [2024-06-03 20:47:32,899 INFO L125 PetriNetUnfolderBase]: For 123492/123495 co-relation queries the response was YES. [2024-06-03 20:47:32,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21333 conditions, 3212 events. 1904/3212 cut-off events. For 123492/123495 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 19695 event pairs, 364 based on Foata normal form. 6/3211 useless extension candidates. Maximal degree in co-relation 21214. Up to 2552 conditions per place. [2024-06-03 20:47:32,934 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 224 selfloop transitions, 56 changer transitions 0/286 dead transitions. [2024-06-03 20:47:32,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 286 transitions, 4266 flow [2024-06-03 20:47:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:32,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:47:32,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-03 20:47:32,935 INFO L175 Difference]: Start difference. First operand has 253 places, 259 transitions, 3569 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:47:32,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 286 transitions, 4266 flow [2024-06-03 20:47:33,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 286 transitions, 4169 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:47:33,455 INFO L231 Difference]: Finished difference. Result has 256 places, 260 transitions, 3634 flow [2024-06-03 20:47:33,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3473, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3634, PETRI_PLACES=256, PETRI_TRANSITIONS=260} [2024-06-03 20:47:33,455 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-03 20:47:33,455 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 260 transitions, 3634 flow [2024-06-03 20:47:33,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:33,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:33,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:33,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:47:33,456 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:33,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:33,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1731346060, now seen corresponding path program 15 times [2024-06-03 20:47:33,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:33,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665215530] [2024-06-03 20:47:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:33,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:33,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:33,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:33,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665215530] [2024-06-03 20:47:33,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665215530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:33,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:33,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:33,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112677042] [2024-06-03 20:47:33,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:33,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:33,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:33,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:33,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:33,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:33,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 260 transitions, 3634 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:33,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:33,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:33,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:34,446 INFO L124 PetriNetUnfolderBase]: 1891/3193 cut-off events. [2024-06-03 20:47:34,447 INFO L125 PetriNetUnfolderBase]: For 115530/115533 co-relation queries the response was YES. [2024-06-03 20:47:34,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21038 conditions, 3193 events. 1891/3193 cut-off events. For 115530/115533 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 19541 event pairs, 365 based on Foata normal form. 6/3192 useless extension candidates. Maximal degree in co-relation 20918. Up to 2655 conditions per place. [2024-06-03 20:47:34,488 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 236 selfloop transitions, 46 changer transitions 0/288 dead transitions. [2024-06-03 20:47:34,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 288 transitions, 4316 flow [2024-06-03 20:47:34,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:47:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:47:34,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:47:34,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-03 20:47:34,489 INFO L175 Difference]: Start difference. First operand has 256 places, 260 transitions, 3634 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:47:34,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 288 transitions, 4316 flow [2024-06-03 20:47:34,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 288 transitions, 4177 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:34,956 INFO L231 Difference]: Finished difference. Result has 257 places, 260 transitions, 3591 flow [2024-06-03 20:47:34,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3495, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3591, PETRI_PLACES=257, PETRI_TRANSITIONS=260} [2024-06-03 20:47:34,956 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 216 predicate places. [2024-06-03 20:47:34,956 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 260 transitions, 3591 flow [2024-06-03 20:47:34,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:34,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:34,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:34,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:47:34,957 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:34,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:34,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1426778198, now seen corresponding path program 16 times [2024-06-03 20:47:34,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:34,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267988332] [2024-06-03 20:47:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:34,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:35,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:35,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267988332] [2024-06-03 20:47:35,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267988332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:35,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:35,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:35,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535316612] [2024-06-03 20:47:35,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:35,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:35,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:35,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:35,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:35,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:35,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 260 transitions, 3591 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:35,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:35,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:35,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:35,818 INFO L124 PetriNetUnfolderBase]: 1995/3366 cut-off events. [2024-06-03 20:47:35,818 INFO L125 PetriNetUnfolderBase]: For 170237/170237 co-relation queries the response was YES. [2024-06-03 20:47:35,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21756 conditions, 3366 events. 1995/3366 cut-off events. For 170237/170237 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 20794 event pairs, 506 based on Foata normal form. 34/3397 useless extension candidates. Maximal degree in co-relation 21637. Up to 2841 conditions per place. [2024-06-03 20:47:35,856 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 217 selfloop transitions, 64 changer transitions 6/293 dead transitions. [2024-06-03 20:47:35,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 293 transitions, 4318 flow [2024-06-03 20:47:35,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:47:35,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:47:35,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 247 transitions. [2024-06-03 20:47:35,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5145833333333333 [2024-06-03 20:47:35,857 INFO L175 Difference]: Start difference. First operand has 257 places, 260 transitions, 3591 flow. Second operand 12 states and 247 transitions. [2024-06-03 20:47:35,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 293 transitions, 4318 flow [2024-06-03 20:47:36,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 293 transitions, 4129 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-03 20:47:36,455 INFO L231 Difference]: Finished difference. Result has 260 places, 257 transitions, 3528 flow [2024-06-03 20:47:36,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3402, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3528, PETRI_PLACES=260, PETRI_TRANSITIONS=257} [2024-06-03 20:47:36,456 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-03 20:47:36,456 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 257 transitions, 3528 flow [2024-06-03 20:47:36,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:36,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:36,456 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] [2024-06-03 20:47:36,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:47:36,456 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:36,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:36,456 INFO L85 PathProgramCache]: Analyzing trace with hash -976708026, now seen corresponding path program 17 times [2024-06-03 20:47:36,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:36,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676343397] [2024-06-03 20:47:36,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:36,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:36,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:36,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:36,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676343397] [2024-06-03 20:47:36,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676343397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:36,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:36,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:36,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036757640] [2024-06-03 20:47:36,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:36,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:36,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:36,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:36,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:36,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:36,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 257 transitions, 3528 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:36,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:36,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:36,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:37,242 INFO L124 PetriNetUnfolderBase]: 1940/3271 cut-off events. [2024-06-03 20:47:37,242 INFO L125 PetriNetUnfolderBase]: For 117037/117037 co-relation queries the response was YES. [2024-06-03 20:47:37,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21043 conditions, 3271 events. 1940/3271 cut-off events. For 117037/117037 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 20118 event pairs, 474 based on Foata normal form. 8/3276 useless extension candidates. Maximal degree in co-relation 20926. Up to 2885 conditions per place. [2024-06-03 20:47:37,278 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 218 selfloop transitions, 63 changer transitions 0/287 dead transitions. [2024-06-03 20:47:37,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 287 transitions, 4219 flow [2024-06-03 20:47:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:37,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 229 transitions. [2024-06-03 20:47:37,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204545454545455 [2024-06-03 20:47:37,279 INFO L175 Difference]: Start difference. First operand has 260 places, 257 transitions, 3528 flow. Second operand 11 states and 229 transitions. [2024-06-03 20:47:37,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 287 transitions, 4219 flow [2024-06-03 20:47:37,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 287 transitions, 4067 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-03 20:47:37,783 INFO L231 Difference]: Finished difference. Result has 259 places, 258 transitions, 3533 flow [2024-06-03 20:47:37,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3533, PETRI_PLACES=259, PETRI_TRANSITIONS=258} [2024-06-03 20:47:37,783 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 218 predicate places. [2024-06-03 20:47:37,784 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 258 transitions, 3533 flow [2024-06-03 20:47:37,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:37,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:37,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:37,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:47:37,784 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:37,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:37,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1596475600, now seen corresponding path program 18 times [2024-06-03 20:47:37,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:37,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937410693] [2024-06-03 20:47:37,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:37,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:38,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:38,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937410693] [2024-06-03 20:47:38,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937410693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:38,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:38,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:38,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493533195] [2024-06-03 20:47:38,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:38,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:38,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:38,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:38,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:38,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:38,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 258 transitions, 3533 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:38,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:38,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:38,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:38,608 INFO L124 PetriNetUnfolderBase]: 1968/3315 cut-off events. [2024-06-03 20:47:38,608 INFO L125 PetriNetUnfolderBase]: For 117125/117125 co-relation queries the response was YES. [2024-06-03 20:47:38,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21252 conditions, 3315 events. 1968/3315 cut-off events. For 117125/117125 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 20431 event pairs, 491 based on Foata normal form. 8/3320 useless extension candidates. Maximal degree in co-relation 21136. Up to 2929 conditions per place. [2024-06-03 20:47:38,644 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 218 selfloop transitions, 61 changer transitions 0/285 dead transitions. [2024-06-03 20:47:38,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 285 transitions, 4216 flow [2024-06-03 20:47:38,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:38,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-03 20:47:38,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-03 20:47:38,645 INFO L175 Difference]: Start difference. First operand has 259 places, 258 transitions, 3533 flow. Second operand 8 states and 179 transitions. [2024-06-03 20:47:38,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 285 transitions, 4216 flow [2024-06-03 20:47:39,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 285 transitions, 4077 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-03 20:47:39,204 INFO L231 Difference]: Finished difference. Result has 258 places, 259 transitions, 3549 flow [2024-06-03 20:47:39,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3394, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3549, PETRI_PLACES=258, PETRI_TRANSITIONS=259} [2024-06-03 20:47:39,204 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-03 20:47:39,205 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 259 transitions, 3549 flow [2024-06-03 20:47:39,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:39,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:39,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:39,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:47:39,205 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:39,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:39,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1588857040, now seen corresponding path program 19 times [2024-06-03 20:47:39,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:39,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27491127] [2024-06-03 20:47:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:39,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:39,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:39,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27491127] [2024-06-03 20:47:39,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27491127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:39,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:39,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:39,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845648303] [2024-06-03 20:47:39,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:39,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:39,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:39,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:39,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:39,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:39,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 259 transitions, 3549 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:39,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:39,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:39,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:40,014 INFO L124 PetriNetUnfolderBase]: 1996/3359 cut-off events. [2024-06-03 20:47:40,015 INFO L125 PetriNetUnfolderBase]: For 120821/120821 co-relation queries the response was YES. [2024-06-03 20:47:40,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21565 conditions, 3359 events. 1996/3359 cut-off events. For 120821/120821 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 20679 event pairs, 491 based on Foata normal form. 8/3364 useless extension candidates. Maximal degree in co-relation 21448. Up to 2833 conditions per place. [2024-06-03 20:47:40,052 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 220 selfloop transitions, 64 changer transitions 0/290 dead transitions. [2024-06-03 20:47:40,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 290 transitions, 4284 flow [2024-06-03 20:47:40,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:40,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:40,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 20:47:40,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-03 20:47:40,053 INFO L175 Difference]: Start difference. First operand has 258 places, 259 transitions, 3549 flow. Second operand 8 states and 182 transitions. [2024-06-03 20:47:40,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 290 transitions, 4284 flow [2024-06-03 20:47:40,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 290 transitions, 4147 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:40,648 INFO L231 Difference]: Finished difference. Result has 260 places, 260 transitions, 3574 flow [2024-06-03 20:47:40,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3574, PETRI_PLACES=260, PETRI_TRANSITIONS=260} [2024-06-03 20:47:40,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-03 20:47:40,649 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 260 transitions, 3574 flow [2024-06-03 20:47:40,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:40,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:40,649 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] [2024-06-03 20:47:40,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:47:40,649 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:40,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:40,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1633698548, now seen corresponding path program 20 times [2024-06-03 20:47:40,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:40,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898671226] [2024-06-03 20:47:40,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:40,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:40,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:40,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:40,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898671226] [2024-06-03 20:47:40,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898671226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:40,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:40,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:40,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434072515] [2024-06-03 20:47:40,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:40,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:40,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:40,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:40,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:40,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:40,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 260 transitions, 3574 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:40,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:40,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:40,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:41,465 INFO L124 PetriNetUnfolderBase]: 2011/3384 cut-off events. [2024-06-03 20:47:41,465 INFO L125 PetriNetUnfolderBase]: For 120060/120060 co-relation queries the response was YES. [2024-06-03 20:47:41,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21640 conditions, 3384 events. 2011/3384 cut-off events. For 120060/120060 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 20917 event pairs, 503 based on Foata normal form. 8/3389 useless extension candidates. Maximal degree in co-relation 21522. Up to 2858 conditions per place. [2024-06-03 20:47:41,503 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 222 selfloop transitions, 66 changer transitions 0/294 dead transitions. [2024-06-03 20:47:41,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 294 transitions, 4325 flow [2024-06-03 20:47:41,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:41,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:41,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-03 20:47:41,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-06-03 20:47:41,504 INFO L175 Difference]: Start difference. First operand has 260 places, 260 transitions, 3574 flow. Second operand 11 states and 232 transitions. [2024-06-03 20:47:41,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 294 transitions, 4325 flow [2024-06-03 20:47:42,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 294 transitions, 4179 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:42,076 INFO L231 Difference]: Finished difference. Result has 265 places, 261 transitions, 3596 flow [2024-06-03 20:47:42,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3428, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3596, PETRI_PLACES=265, PETRI_TRANSITIONS=261} [2024-06-03 20:47:42,076 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 224 predicate places. [2024-06-03 20:47:42,076 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 261 transitions, 3596 flow [2024-06-03 20:47:42,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:42,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:42,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:42,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:47:42,077 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:42,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:42,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1730960110, now seen corresponding path program 21 times [2024-06-03 20:47:42,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:42,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956696847] [2024-06-03 20:47:42,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:42,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:42,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:42,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:42,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956696847] [2024-06-03 20:47:42,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956696847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:42,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:42,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:42,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348048353] [2024-06-03 20:47:42,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:42,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:42,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:42,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:42,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:42,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:42,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 261 transitions, 3596 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:42,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:42,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:42,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:42,888 INFO L124 PetriNetUnfolderBase]: 1998/3365 cut-off events. [2024-06-03 20:47:42,888 INFO L125 PetriNetUnfolderBase]: For 106022/106022 co-relation queries the response was YES. [2024-06-03 20:47:42,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21041 conditions, 3365 events. 1998/3365 cut-off events. For 106022/106022 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 20853 event pairs, 387 based on Foata normal form. 6/3368 useless extension candidates. Maximal degree in co-relation 20922. Up to 2344 conditions per place. [2024-06-03 20:47:42,924 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 208 selfloop transitions, 84 changer transitions 0/298 dead transitions. [2024-06-03 20:47:42,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 298 transitions, 4351 flow [2024-06-03 20:47:42,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:42,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:42,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 20:47:42,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.590625 [2024-06-03 20:47:42,925 INFO L175 Difference]: Start difference. First operand has 265 places, 261 transitions, 3596 flow. Second operand 8 states and 189 transitions. [2024-06-03 20:47:42,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 298 transitions, 4351 flow [2024-06-03 20:47:43,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 298 transitions, 4199 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-03 20:47:43,393 INFO L231 Difference]: Finished difference. Result has 264 places, 261 transitions, 3616 flow [2024-06-03 20:47:43,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3444, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3616, PETRI_PLACES=264, PETRI_TRANSITIONS=261} [2024-06-03 20:47:43,393 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-03 20:47:43,394 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 261 transitions, 3616 flow [2024-06-03 20:47:43,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:43,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:43,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:43,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:47:43,394 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:43,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:43,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2129773958, now seen corresponding path program 2 times [2024-06-03 20:47:43,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:43,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137677975] [2024-06-03 20:47:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:43,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:43,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:43,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:43,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137677975] [2024-06-03 20:47:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137677975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:43,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:43,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:43,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606456896] [2024-06-03 20:47:43,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:43,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:43,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:43,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:43,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:43,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:43,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 261 transitions, 3616 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:43,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:43,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:43,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:44,284 INFO L124 PetriNetUnfolderBase]: 2106/3563 cut-off events. [2024-06-03 20:47:44,285 INFO L125 PetriNetUnfolderBase]: For 158292/158292 co-relation queries the response was YES. [2024-06-03 20:47:44,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22072 conditions, 3563 events. 2106/3563 cut-off events. For 158292/158292 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 22331 event pairs, 524 based on Foata normal form. 30/3590 useless extension candidates. Maximal degree in co-relation 21952. Up to 2901 conditions per place. [2024-06-03 20:47:44,322 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 221 selfloop transitions, 67 changer transitions 8/302 dead transitions. [2024-06-03 20:47:44,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 302 transitions, 4453 flow [2024-06-03 20:47:44,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:47:44,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:47:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-03 20:47:44,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5229166666666667 [2024-06-03 20:47:44,323 INFO L175 Difference]: Start difference. First operand has 264 places, 261 transitions, 3616 flow. Second operand 12 states and 251 transitions. [2024-06-03 20:47:44,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 302 transitions, 4453 flow [2024-06-03 20:47:44,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 302 transitions, 4109 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-03 20:47:44,931 INFO L231 Difference]: Finished difference. Result has 268 places, 261 transitions, 3448 flow [2024-06-03 20:47:44,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3272, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3448, PETRI_PLACES=268, PETRI_TRANSITIONS=261} [2024-06-03 20:47:44,931 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-03 20:47:44,931 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 261 transitions, 3448 flow [2024-06-03 20:47:44,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:44,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:44,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:44,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:47:44,932 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:44,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:44,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2063099270, now seen corresponding path program 3 times [2024-06-03 20:47:44,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:44,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032040198] [2024-06-03 20:47:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:44,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:45,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:45,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032040198] [2024-06-03 20:47:45,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032040198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:45,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:45,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:45,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334528894] [2024-06-03 20:47:45,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:45,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:45,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:45,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:45,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:45,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:45,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 261 transitions, 3448 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:45,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:45,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:45,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:45,776 INFO L124 PetriNetUnfolderBase]: 2025/3416 cut-off events. [2024-06-03 20:47:45,777 INFO L125 PetriNetUnfolderBase]: For 108752/108752 co-relation queries the response was YES. [2024-06-03 20:47:45,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20734 conditions, 3416 events. 2025/3416 cut-off events. For 108752/108752 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 21247 event pairs, 475 based on Foata normal form. 6/3419 useless extension candidates. Maximal degree in co-relation 20614. Up to 2548 conditions per place. [2024-06-03 20:47:45,814 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 79 changer transitions 0/300 dead transitions. [2024-06-03 20:47:45,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 300 transitions, 4379 flow [2024-06-03 20:47:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:45,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-03 20:47:45,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-06-03 20:47:45,815 INFO L175 Difference]: Start difference. First operand has 268 places, 261 transitions, 3448 flow. Second operand 11 states and 232 transitions. [2024-06-03 20:47:45,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 300 transitions, 4379 flow [2024-06-03 20:47:46,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 300 transitions, 4212 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-03 20:47:46,352 INFO L231 Difference]: Finished difference. Result has 270 places, 264 transitions, 3533 flow [2024-06-03 20:47:46,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3285, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3533, PETRI_PLACES=270, PETRI_TRANSITIONS=264} [2024-06-03 20:47:46,352 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 229 predicate places. [2024-06-03 20:47:46,352 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 264 transitions, 3533 flow [2024-06-03 20:47:46,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:46,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:46,352 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] [2024-06-03 20:47:46,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:47:46,353 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:46,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:46,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2062891880, now seen corresponding path program 4 times [2024-06-03 20:47:46,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:46,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711736015] [2024-06-03 20:47:46,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:46,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:46,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:46,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711736015] [2024-06-03 20:47:46,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711736015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:46,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:46,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:47:46,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894706482] [2024-06-03 20:47:46,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:46,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:47:46,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:46,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:47:46,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:47:46,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:46,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 264 transitions, 3533 flow. Second operand has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:46,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:46,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:46,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:47,249 INFO L124 PetriNetUnfolderBase]: 2012/3397 cut-off events. [2024-06-03 20:47:47,249 INFO L125 PetriNetUnfolderBase]: For 97419/97419 co-relation queries the response was YES. [2024-06-03 20:47:47,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20474 conditions, 3397 events. 2012/3397 cut-off events. For 97419/97419 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 21081 event pairs, 455 based on Foata normal form. 6/3400 useless extension candidates. Maximal degree in co-relation 20353. Up to 2542 conditions per place. [2024-06-03 20:47:47,281 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 79 changer transitions 0/300 dead transitions. [2024-06-03 20:47:47,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 300 transitions, 4290 flow [2024-06-03 20:47:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:47:47,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:47:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-03 20:47:47,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-06-03 20:47:47,281 INFO L175 Difference]: Start difference. First operand has 270 places, 264 transitions, 3533 flow. Second operand 11 states and 232 transitions. [2024-06-03 20:47:47,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 300 transitions, 4290 flow [2024-06-03 20:47:47,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 300 transitions, 4116 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:47,615 INFO L231 Difference]: Finished difference. Result has 273 places, 264 transitions, 3521 flow [2024-06-03 20:47:47,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3359, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3521, PETRI_PLACES=273, PETRI_TRANSITIONS=264} [2024-06-03 20:47:47,616 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 232 predicate places. [2024-06-03 20:47:47,616 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 264 transitions, 3521 flow [2024-06-03 20:47:47,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.7) internal successors, (147), 10 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:47,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:47,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:47,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:47:47,616 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:47,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:47,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1137350, now seen corresponding path program 1 times [2024-06-03 20:47:47,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:47,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114238330] [2024-06-03 20:47:47,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:47,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:47,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:47,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114238330] [2024-06-03 20:47:47,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114238330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:47,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:47,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:47:47,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067272601] [2024-06-03 20:47:47,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:47,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:47:47,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:47,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:47:47,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:47:47,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:47,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 264 transitions, 3521 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:47,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:47,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:47,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:48,577 INFO L124 PetriNetUnfolderBase]: 2352/4000 cut-off events. [2024-06-03 20:47:48,577 INFO L125 PetriNetUnfolderBase]: For 229213/229216 co-relation queries the response was YES. [2024-06-03 20:47:48,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26069 conditions, 4000 events. 2352/4000 cut-off events. For 229213/229216 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 25782 event pairs, 419 based on Foata normal form. 18/4011 useless extension candidates. Maximal degree in co-relation 25948. Up to 2202 conditions per place. [2024-06-03 20:47:48,619 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 213 selfloop transitions, 80 changer transitions 15/314 dead transitions. [2024-06-03 20:47:48,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 314 transitions, 4731 flow [2024-06-03 20:47:48,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:47:48,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:47:48,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-03 20:47:48,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5805555555555556 [2024-06-03 20:47:48,620 INFO L175 Difference]: Start difference. First operand has 273 places, 264 transitions, 3521 flow. Second operand 9 states and 209 transitions. [2024-06-03 20:47:48,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 314 transitions, 4731 flow [2024-06-03 20:47:49,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 314 transitions, 4490 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-03 20:47:49,467 INFO L231 Difference]: Finished difference. Result has 272 places, 267 transitions, 3555 flow [2024-06-03 20:47:49,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3284, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3555, PETRI_PLACES=272, PETRI_TRANSITIONS=267} [2024-06-03 20:47:49,468 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-03 20:47:49,468 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 267 transitions, 3555 flow [2024-06-03 20:47:49,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:49,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:49,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:49,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:47:49,468 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:49,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:49,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1903797592, now seen corresponding path program 2 times [2024-06-03 20:47:49,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:49,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164749435] [2024-06-03 20:47:49,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:49,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:49,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:49,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:49,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164749435] [2024-06-03 20:47:49,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164749435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:49,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:49,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:49,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176034645] [2024-06-03 20:47:49,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:49,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:49,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:49,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:49,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:49,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:49,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 267 transitions, 3555 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:49,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:49,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:49,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:50,426 INFO L124 PetriNetUnfolderBase]: 2401/4107 cut-off events. [2024-06-03 20:47:50,426 INFO L125 PetriNetUnfolderBase]: For 271373/271376 co-relation queries the response was YES. [2024-06-03 20:47:50,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27701 conditions, 4107 events. 2401/4107 cut-off events. For 271373/271376 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 26766 event pairs, 605 based on Foata normal form. 18/4118 useless extension candidates. Maximal degree in co-relation 27580. Up to 3364 conditions per place. [2024-06-03 20:47:50,472 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 264 selfloop transitions, 24 changer transitions 12/306 dead transitions. [2024-06-03 20:47:50,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 306 transitions, 4507 flow [2024-06-03 20:47:50,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:47:50,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:47:50,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-03 20:47:50,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5275 [2024-06-03 20:47:50,473 INFO L175 Difference]: Start difference. First operand has 272 places, 267 transitions, 3555 flow. Second operand 10 states and 211 transitions. [2024-06-03 20:47:50,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 306 transitions, 4507 flow [2024-06-03 20:47:51,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 306 transitions, 4395 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:47:51,443 INFO L231 Difference]: Finished difference. Result has 272 places, 265 transitions, 3479 flow [2024-06-03 20:47:51,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3447, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3479, PETRI_PLACES=272, PETRI_TRANSITIONS=265} [2024-06-03 20:47:51,444 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 231 predicate places. [2024-06-03 20:47:51,444 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 265 transitions, 3479 flow [2024-06-03 20:47:51,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:51,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:51,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:51,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:47:51,444 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:51,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:51,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1748401398, now seen corresponding path program 3 times [2024-06-03 20:47:51,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:51,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096978208] [2024-06-03 20:47:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:51,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:51,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:51,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096978208] [2024-06-03 20:47:51,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096978208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:51,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:51,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:51,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104940082] [2024-06-03 20:47:51,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:51,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:51,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:51,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:51,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:51,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:51,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 265 transitions, 3479 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:51,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:51,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:51,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:52,264 INFO L124 PetriNetUnfolderBase]: 2215/3769 cut-off events. [2024-06-03 20:47:52,264 INFO L125 PetriNetUnfolderBase]: For 184412/184415 co-relation queries the response was YES. [2024-06-03 20:47:52,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23616 conditions, 3769 events. 2215/3769 cut-off events. For 184412/184415 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 24010 event pairs, 544 based on Foata normal form. 18/3780 useless extension candidates. Maximal degree in co-relation 23496. Up to 3229 conditions per place. [2024-06-03 20:47:52,303 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 245 selfloop transitions, 20 changer transitions 22/293 dead transitions. [2024-06-03 20:47:52,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 293 transitions, 4199 flow [2024-06-03 20:47:52,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:52,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-03 20:47:52,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-03 20:47:52,304 INFO L175 Difference]: Start difference. First operand has 272 places, 265 transitions, 3479 flow. Second operand 8 states and 172 transitions. [2024-06-03 20:47:52,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 293 transitions, 4199 flow [2024-06-03 20:47:53,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 293 transitions, 4139 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 20:47:53,042 INFO L231 Difference]: Finished difference. Result has 269 places, 261 transitions, 3423 flow [2024-06-03 20:47:53,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3419, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3423, PETRI_PLACES=269, PETRI_TRANSITIONS=261} [2024-06-03 20:47:53,051 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 228 predicate places. [2024-06-03 20:47:53,051 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 261 transitions, 3423 flow [2024-06-03 20:47:53,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:53,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:53,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:53,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:47:53,052 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:53,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:53,052 INFO L85 PathProgramCache]: Analyzing trace with hash 968330042, now seen corresponding path program 4 times [2024-06-03 20:47:53,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:53,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552028569] [2024-06-03 20:47:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:53,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:53,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:53,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552028569] [2024-06-03 20:47:53,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552028569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:53,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:53,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:53,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700452288] [2024-06-03 20:47:53,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:53,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:53,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:53,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:53,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 261 transitions, 3423 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:53,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:53,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:53,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:53,887 INFO L124 PetriNetUnfolderBase]: 2154/3648 cut-off events. [2024-06-03 20:47:53,888 INFO L125 PetriNetUnfolderBase]: For 196362/196365 co-relation queries the response was YES. [2024-06-03 20:47:53,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23168 conditions, 3648 events. 2154/3648 cut-off events. For 196362/196365 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23184 event pairs, 419 based on Foata normal form. 24/3666 useless extension candidates. Maximal degree in co-relation 23048. Up to 2340 conditions per place. [2024-06-03 20:47:53,928 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 208 selfloop transitions, 71 changer transitions 10/295 dead transitions. [2024-06-03 20:47:53,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 295 transitions, 4376 flow [2024-06-03 20:47:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:53,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:53,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 20:47:53,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-06-03 20:47:53,929 INFO L175 Difference]: Start difference. First operand has 269 places, 261 transitions, 3423 flow. Second operand 8 states and 185 transitions. [2024-06-03 20:47:53,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 295 transitions, 4376 flow [2024-06-03 20:47:54,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 295 transitions, 4328 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:47:54,766 INFO L231 Difference]: Finished difference. Result has 266 places, 258 transitions, 3478 flow [2024-06-03 20:47:54,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3379, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3478, PETRI_PLACES=266, PETRI_TRANSITIONS=258} [2024-06-03 20:47:54,766 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 225 predicate places. [2024-06-03 20:47:54,766 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 258 transitions, 3478 flow [2024-06-03 20:47:54,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:54,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:54,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:54,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:47:54,767 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:54,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:54,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1204505402, now seen corresponding path program 5 times [2024-06-03 20:47:54,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:54,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530450344] [2024-06-03 20:47:54,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:54,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:54,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:54,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530450344] [2024-06-03 20:47:54,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530450344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:54,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:54,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:54,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828822650] [2024-06-03 20:47:54,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:54,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:54,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:54,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:54,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:55,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:55,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 258 transitions, 3478 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:55,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:55,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:55,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:55,564 INFO L124 PetriNetUnfolderBase]: 2058/3478 cut-off events. [2024-06-03 20:47:55,565 INFO L125 PetriNetUnfolderBase]: For 193239/193242 co-relation queries the response was YES. [2024-06-03 20:47:55,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22519 conditions, 3478 events. 2058/3478 cut-off events. For 193239/193242 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 21809 event pairs, 533 based on Foata normal form. 24/3496 useless extension candidates. Maximal degree in co-relation 22399. Up to 2628 conditions per place. [2024-06-03 20:47:55,601 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 57 changer transitions 6/284 dead transitions. [2024-06-03 20:47:55,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 284 transitions, 4340 flow [2024-06-03 20:47:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:55,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-03 20:47:55,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.559375 [2024-06-03 20:47:55,602 INFO L175 Difference]: Start difference. First operand has 266 places, 258 transitions, 3478 flow. Second operand 8 states and 179 transitions. [2024-06-03 20:47:55,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 284 transitions, 4340 flow [2024-06-03 20:47:56,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 284 transitions, 4069 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-03 20:47:56,286 INFO L231 Difference]: Finished difference. Result has 264 places, 256 transitions, 3320 flow [2024-06-03 20:47:56,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3210, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3320, PETRI_PLACES=264, PETRI_TRANSITIONS=256} [2024-06-03 20:47:56,286 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 223 predicate places. [2024-06-03 20:47:56,287 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 256 transitions, 3320 flow [2024-06-03 20:47:56,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:56,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:56,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:56,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:47:56,287 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:56,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:56,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1204802072, now seen corresponding path program 6 times [2024-06-03 20:47:56,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:56,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712975839] [2024-06-03 20:47:56,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:56,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:56,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:56,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:56,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712975839] [2024-06-03 20:47:56,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712975839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:56,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:56,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:56,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196861357] [2024-06-03 20:47:56,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:56,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:56,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:56,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:56,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:56,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:56,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 256 transitions, 3320 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:56,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:56,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:56,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:57,035 INFO L124 PetriNetUnfolderBase]: 1907/3223 cut-off events. [2024-06-03 20:47:57,035 INFO L125 PetriNetUnfolderBase]: For 138065/138068 co-relation queries the response was YES. [2024-06-03 20:47:57,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19257 conditions, 3223 events. 1907/3223 cut-off events. For 138065/138068 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 19910 event pairs, 514 based on Foata normal form. 26/3243 useless extension candidates. Maximal degree in co-relation 19137. Up to 2688 conditions per place. [2024-06-03 20:47:57,069 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 212 selfloop transitions, 48 changer transitions 8/274 dead transitions. [2024-06-03 20:47:57,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 274 transitions, 3948 flow [2024-06-03 20:47:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:57,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:57,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-03 20:47:57,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-03 20:47:57,070 INFO L175 Difference]: Start difference. First operand has 264 places, 256 transitions, 3320 flow. Second operand 8 states and 172 transitions. [2024-06-03 20:47:57,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 274 transitions, 3948 flow [2024-06-03 20:47:57,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 274 transitions, 3784 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-03 20:47:57,527 INFO L231 Difference]: Finished difference. Result has 263 places, 250 transitions, 3184 flow [2024-06-03 20:47:57,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3156, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3184, PETRI_PLACES=263, PETRI_TRANSITIONS=250} [2024-06-03 20:47:57,528 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 222 predicate places. [2024-06-03 20:47:57,528 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 250 transitions, 3184 flow [2024-06-03 20:47:57,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:57,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:57,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:57,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:47:57,528 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:57,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:57,529 INFO L85 PathProgramCache]: Analyzing trace with hash -388720656, now seen corresponding path program 7 times [2024-06-03 20:47:57,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:57,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424762546] [2024-06-03 20:47:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:57,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:57,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:57,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424762546] [2024-06-03 20:47:57,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424762546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:57,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:57,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:57,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664096241] [2024-06-03 20:47:57,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:57,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:57,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:57,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:57,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:57,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:57,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 250 transitions, 3184 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:57,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:57,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:57,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:58,354 INFO L124 PetriNetUnfolderBase]: 1948/3310 cut-off events. [2024-06-03 20:47:58,354 INFO L125 PetriNetUnfolderBase]: For 156064/156065 co-relation queries the response was YES. [2024-06-03 20:47:58,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20503 conditions, 3310 events. 1948/3310 cut-off events. For 156064/156065 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 20488 event pairs, 328 based on Foata normal form. 18/3322 useless extension candidates. Maximal degree in co-relation 20384. Up to 2402 conditions per place. [2024-06-03 20:47:58,391 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 215 selfloop transitions, 52 changer transitions 8/281 dead transitions. [2024-06-03 20:47:58,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 281 transitions, 4032 flow [2024-06-03 20:47:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:58,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 20:47:58,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-03 20:47:58,393 INFO L175 Difference]: Start difference. First operand has 263 places, 250 transitions, 3184 flow. Second operand 8 states and 182 transitions. [2024-06-03 20:47:58,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 281 transitions, 4032 flow [2024-06-03 20:47:58,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 281 transitions, 3785 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-03 20:47:58,964 INFO L231 Difference]: Finished difference. Result has 258 places, 248 transitions, 3030 flow [2024-06-03 20:47:58,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2939, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3030, PETRI_PLACES=258, PETRI_TRANSITIONS=248} [2024-06-03 20:47:58,965 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-03 20:47:58,965 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 248 transitions, 3030 flow [2024-06-03 20:47:58,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:58,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:58,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:58,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:47:58,965 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:58,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:58,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1330604952, now seen corresponding path program 8 times [2024-06-03 20:47:58,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:58,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168294607] [2024-06-03 20:47:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:58,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:59,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:59,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168294607] [2024-06-03 20:47:59,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168294607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:59,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:59,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:59,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974321814] [2024-06-03 20:47:59,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:59,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:59,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:59,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:59,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:59,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:47:59,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 248 transitions, 3030 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:47:59,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:59,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:47:59,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:59,737 INFO L124 PetriNetUnfolderBase]: 1843/3123 cut-off events. [2024-06-03 20:47:59,737 INFO L125 PetriNetUnfolderBase]: For 117165/117166 co-relation queries the response was YES. [2024-06-03 20:47:59,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18431 conditions, 3123 events. 1843/3123 cut-off events. For 117165/117166 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 19111 event pairs, 310 based on Foata normal form. 18/3135 useless extension candidates. Maximal degree in co-relation 18314. Up to 2402 conditions per place. [2024-06-03 20:47:59,769 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 207 selfloop transitions, 50 changer transitions 14/277 dead transitions. [2024-06-03 20:47:59,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 277 transitions, 3718 flow [2024-06-03 20:47:59,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:47:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:47:59,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 20:47:59,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 20:47:59,771 INFO L175 Difference]: Start difference. First operand has 258 places, 248 transitions, 3030 flow. Second operand 8 states and 180 transitions. [2024-06-03 20:47:59,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 277 transitions, 3718 flow [2024-06-03 20:48:00,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 277 transitions, 3610 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:00,188 INFO L231 Difference]: Finished difference. Result has 256 places, 242 transitions, 2973 flow [2024-06-03 20:48:00,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2922, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2973, PETRI_PLACES=256, PETRI_TRANSITIONS=242} [2024-06-03 20:48:00,188 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-03 20:48:00,188 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 242 transitions, 2973 flow [2024-06-03 20:48:00,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:00,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:00,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:00,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:48:00,189 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:48:00,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:00,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1394977240, now seen corresponding path program 9 times [2024-06-03 20:48:00,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:00,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581084157] [2024-06-03 20:48:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:00,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:00,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:00,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:00,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581084157] [2024-06-03 20:48:00,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581084157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:00,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:00,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:00,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890449085] [2024-06-03 20:48:00,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:00,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:00,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:00,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:00,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:00,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:00,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 242 transitions, 2973 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:00,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:00,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:00,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:00,980 INFO L124 PetriNetUnfolderBase]: 1954/3291 cut-off events. [2024-06-03 20:48:00,980 INFO L125 PetriNetUnfolderBase]: For 182447/182447 co-relation queries the response was YES. [2024-06-03 20:48:01,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21085 conditions, 3291 events. 1954/3291 cut-off events. For 182447/182447 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 20301 event pairs, 531 based on Foata normal form. 24/3310 useless extension candidates. Maximal degree in co-relation 20969. Up to 2233 conditions per place. [2024-06-03 20:48:01,014 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 160 selfloop transitions, 93 changer transitions 21/280 dead transitions. [2024-06-03 20:48:01,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 280 transitions, 3879 flow [2024-06-03 20:48:01,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:01,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-03 20:48:01,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-03 20:48:01,015 INFO L175 Difference]: Start difference. First operand has 256 places, 242 transitions, 2973 flow. Second operand 11 states and 231 transitions. [2024-06-03 20:48:01,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 280 transitions, 3879 flow [2024-06-03 20:48:01,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 280 transitions, 3748 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-03 20:48:01,643 INFO L231 Difference]: Finished difference. Result has 252 places, 236 transitions, 2959 flow [2024-06-03 20:48:01,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2848, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2959, PETRI_PLACES=252, PETRI_TRANSITIONS=236} [2024-06-03 20:48:01,644 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 211 predicate places. [2024-06-03 20:48:01,644 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 236 transitions, 2959 flow [2024-06-03 20:48:01,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:01,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:01,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:01,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:48:01,644 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)] === [2024-06-03 20:48:01,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:01,645 INFO L85 PathProgramCache]: Analyzing trace with hash 509151676, now seen corresponding path program 1 times [2024-06-03 20:48:01,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:01,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771380643] [2024-06-03 20:48:01,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:01,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:01,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:01,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:01,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771380643] [2024-06-03 20:48:01,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771380643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:01,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:01,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:01,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158544130] [2024-06-03 20:48:01,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:01,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:01,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:01,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:01,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:01,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:01,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 236 transitions, 2959 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:01,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:01,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:01,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:02,459 INFO L124 PetriNetUnfolderBase]: 1856/3143 cut-off events. [2024-06-03 20:48:02,459 INFO L125 PetriNetUnfolderBase]: For 175858/175858 co-relation queries the response was YES. [2024-06-03 20:48:02,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20140 conditions, 3143 events. 1856/3143 cut-off events. For 175858/175858 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 19378 event pairs, 569 based on Foata normal form. 26/3164 useless extension candidates. Maximal degree in co-relation 20028. Up to 2628 conditions per place. [2024-06-03 20:48:02,492 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 151 selfloop transitions, 91 changer transitions 12/260 dead transitions. [2024-06-03 20:48:02,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 260 transitions, 3573 flow [2024-06-03 20:48:02,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:02,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:02,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 220 transitions. [2024-06-03 20:48:02,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:48:02,493 INFO L175 Difference]: Start difference. First operand has 252 places, 236 transitions, 2959 flow. Second operand 11 states and 220 transitions. [2024-06-03 20:48:02,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 260 transitions, 3573 flow [2024-06-03 20:48:02,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 260 transitions, 3415 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:48:02,993 INFO L231 Difference]: Finished difference. Result has 250 places, 232 transitions, 2960 flow [2024-06-03 20:48:02,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2801, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2960, PETRI_PLACES=250, PETRI_TRANSITIONS=232} [2024-06-03 20:48:02,994 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 209 predicate places. [2024-06-03 20:48:02,994 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 232 transitions, 2960 flow [2024-06-03 20:48:02,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:02,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:02,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:02,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:48:02,994 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)] === [2024-06-03 20:48:02,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:02,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1892072862, now seen corresponding path program 2 times [2024-06-03 20:48:02,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:02,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676701349] [2024-06-03 20:48:02,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:02,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:03,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:03,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:03,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676701349] [2024-06-03 20:48:03,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676701349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:03,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:03,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:03,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201409523] [2024-06-03 20:48:03,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:03,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:03,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:03,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:03,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:03,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:03,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 232 transitions, 2960 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:03,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:03,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:03,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:03,756 INFO L124 PetriNetUnfolderBase]: 1841/3120 cut-off events. [2024-06-03 20:48:03,756 INFO L125 PetriNetUnfolderBase]: For 165058/165058 co-relation queries the response was YES. [2024-06-03 20:48:03,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20003 conditions, 3120 events. 1841/3120 cut-off events. For 165058/165058 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 19165 event pairs, 521 based on Foata normal form. 24/3139 useless extension candidates. Maximal degree in co-relation 19892. Up to 2580 conditions per place. [2024-06-03 20:48:03,789 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 146 selfloop transitions, 85 changer transitions 23/260 dead transitions. [2024-06-03 20:48:03,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 260 transitions, 3620 flow [2024-06-03 20:48:03,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:03,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:03,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 221 transitions. [2024-06-03 20:48:03,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5022727272727273 [2024-06-03 20:48:03,789 INFO L175 Difference]: Start difference. First operand has 250 places, 232 transitions, 2960 flow. Second operand 11 states and 221 transitions. [2024-06-03 20:48:03,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 260 transitions, 3620 flow [2024-06-03 20:48:04,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 260 transitions, 3434 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:04,303 INFO L231 Difference]: Finished difference. Result has 248 places, 225 transitions, 2856 flow [2024-06-03 20:48:04,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2774, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2856, PETRI_PLACES=248, PETRI_TRANSITIONS=225} [2024-06-03 20:48:04,303 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 207 predicate places. [2024-06-03 20:48:04,303 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 225 transitions, 2856 flow [2024-06-03 20:48:04,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:04,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:04,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:04,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:48:04,305 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)] === [2024-06-03 20:48:04,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:04,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1472657340, now seen corresponding path program 3 times [2024-06-03 20:48:04,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:04,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748079349] [2024-06-03 20:48:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:04,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:04,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:04,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:04,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748079349] [2024-06-03 20:48:04,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748079349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:04,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:04,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:04,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582555682] [2024-06-03 20:48:04,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:04,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:04,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:04,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:04,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:04,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:04,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 225 transitions, 2856 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:04,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:04,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:04,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:05,109 INFO L124 PetriNetUnfolderBase]: 2013/3434 cut-off events. [2024-06-03 20:48:05,109 INFO L125 PetriNetUnfolderBase]: For 195556/195556 co-relation queries the response was YES. [2024-06-03 20:48:05,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22653 conditions, 3434 events. 2013/3434 cut-off events. For 195556/195556 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 21773 event pairs, 374 based on Foata normal form. 18/3447 useless extension candidates. Maximal degree in co-relation 22543. Up to 1451 conditions per place. [2024-06-03 20:48:05,144 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 102 changer transitions 17/272 dead transitions. [2024-06-03 20:48:05,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 272 transitions, 3943 flow [2024-06-03 20:48:05,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:05,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:05,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-03 20:48:05,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5525 [2024-06-03 20:48:05,145 INFO L175 Difference]: Start difference. First operand has 248 places, 225 transitions, 2856 flow. Second operand 10 states and 221 transitions. [2024-06-03 20:48:05,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 272 transitions, 3943 flow [2024-06-03 20:48:05,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 272 transitions, 3747 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:05,999 INFO L231 Difference]: Finished difference. Result has 244 places, 223 transitions, 2869 flow [2024-06-03 20:48:05,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2672, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2869, PETRI_PLACES=244, PETRI_TRANSITIONS=223} [2024-06-03 20:48:06,000 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 203 predicate places. [2024-06-03 20:48:06,000 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 223 transitions, 2869 flow [2024-06-03 20:48:06,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:06,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:06,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:06,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:48:06,000 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)] === [2024-06-03 20:48:06,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:06,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1480999440, now seen corresponding path program 4 times [2024-06-03 20:48:06,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:06,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935115421] [2024-06-03 20:48:06,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:06,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:06,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:06,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935115421] [2024-06-03 20:48:06,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935115421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:06,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:06,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:06,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25411769] [2024-06-03 20:48:06,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:06,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:06,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:06,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:06,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:06,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:06,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 223 transitions, 2869 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:06,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:06,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:06,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:06,787 INFO L124 PetriNetUnfolderBase]: 2013/3448 cut-off events. [2024-06-03 20:48:06,787 INFO L125 PetriNetUnfolderBase]: For 216202/216202 co-relation queries the response was YES. [2024-06-03 20:48:06,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23765 conditions, 3448 events. 2013/3448 cut-off events. For 216202/216202 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 22017 event pairs, 446 based on Foata normal form. 18/3461 useless extension candidates. Maximal degree in co-relation 23655. Up to 1451 conditions per place. [2024-06-03 20:48:06,821 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 158 selfloop transitions, 90 changer transitions 10/264 dead transitions. [2024-06-03 20:48:06,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 264 transitions, 3883 flow [2024-06-03 20:48:06,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:06,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:06,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-03 20:48:06,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5475 [2024-06-03 20:48:06,822 INFO L175 Difference]: Start difference. First operand has 244 places, 223 transitions, 2869 flow. Second operand 10 states and 219 transitions. [2024-06-03 20:48:06,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 264 transitions, 3883 flow [2024-06-03 20:48:07,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 264 transitions, 3649 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:07,540 INFO L231 Difference]: Finished difference. Result has 243 places, 220 transitions, 2806 flow [2024-06-03 20:48:07,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2653, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2806, PETRI_PLACES=243, PETRI_TRANSITIONS=220} [2024-06-03 20:48:07,540 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 202 predicate places. [2024-06-03 20:48:07,541 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 220 transitions, 2806 flow [2024-06-03 20:48:07,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:07,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:07,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:07,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:48:07,541 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)] === [2024-06-03 20:48:07,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:07,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1480989210, now seen corresponding path program 5 times [2024-06-03 20:48:07,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:07,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283416826] [2024-06-03 20:48:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:07,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:07,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:07,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:07,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283416826] [2024-06-03 20:48:07,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283416826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:07,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:07,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:07,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440862254] [2024-06-03 20:48:07,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:07,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:07,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:07,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:07,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:07,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:07,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 220 transitions, 2806 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:07,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:07,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:07,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:08,288 INFO L124 PetriNetUnfolderBase]: 1884/3225 cut-off events. [2024-06-03 20:48:08,288 INFO L125 PetriNetUnfolderBase]: For 175111/175111 co-relation queries the response was YES. [2024-06-03 20:48:08,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21363 conditions, 3225 events. 1884/3225 cut-off events. For 175111/175111 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 20283 event pairs, 444 based on Foata normal form. 18/3238 useless extension candidates. Maximal degree in co-relation 21255. Up to 1451 conditions per place. [2024-06-03 20:48:08,317 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 150 selfloop transitions, 84 changer transitions 17/257 dead transitions. [2024-06-03 20:48:08,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 257 transitions, 3638 flow [2024-06-03 20:48:08,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:08,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-03 20:48:08,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-03 20:48:08,318 INFO L175 Difference]: Start difference. First operand has 243 places, 220 transitions, 2806 flow. Second operand 10 states and 215 transitions. [2024-06-03 20:48:08,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 257 transitions, 3638 flow [2024-06-03 20:48:09,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 257 transitions, 3448 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-03 20:48:09,075 INFO L231 Difference]: Finished difference. Result has 240 places, 213 transitions, 2670 flow [2024-06-03 20:48:09,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2618, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2670, PETRI_PLACES=240, PETRI_TRANSITIONS=213} [2024-06-03 20:48:09,076 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 199 predicate places. [2024-06-03 20:48:09,076 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 213 transitions, 2670 flow [2024-06-03 20:48:09,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:09,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:09,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:09,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:48:09,076 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)] === [2024-06-03 20:48:09,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:09,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1538879850, now seen corresponding path program 6 times [2024-06-03 20:48:09,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:09,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718672139] [2024-06-03 20:48:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:09,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:09,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:09,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:09,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718672139] [2024-06-03 20:48:09,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718672139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:09,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:09,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:09,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979625029] [2024-06-03 20:48:09,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:09,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:09,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:09,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:09,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:09,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:09,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 213 transitions, 2670 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:09,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:09,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:09,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:09,849 INFO L124 PetriNetUnfolderBase]: 1979/3366 cut-off events. [2024-06-03 20:48:09,849 INFO L125 PetriNetUnfolderBase]: For 229976/229976 co-relation queries the response was YES. [2024-06-03 20:48:09,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23482 conditions, 3366 events. 1979/3366 cut-off events. For 229976/229976 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 21283 event pairs, 686 based on Foata normal form. 24/3385 useless extension candidates. Maximal degree in co-relation 23376. Up to 2618 conditions per place. [2024-06-03 20:48:09,884 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 147 selfloop transitions, 79 changer transitions 10/242 dead transitions. [2024-06-03 20:48:09,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 242 transitions, 3418 flow [2024-06-03 20:48:09,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:48:09,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:48:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 242 transitions. [2024-06-03 20:48:09,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-06-03 20:48:09,885 INFO L175 Difference]: Start difference. First operand has 240 places, 213 transitions, 2670 flow. Second operand 12 states and 242 transitions. [2024-06-03 20:48:09,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 242 transitions, 3418 flow [2024-06-03 20:48:10,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 242 transitions, 3215 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-03 20:48:10,839 INFO L231 Difference]: Finished difference. Result has 237 places, 210 transitions, 2599 flow [2024-06-03 20:48:10,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2599, PETRI_PLACES=237, PETRI_TRANSITIONS=210} [2024-06-03 20:48:10,840 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 196 predicate places. [2024-06-03 20:48:10,840 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 210 transitions, 2599 flow [2024-06-03 20:48:10,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:10,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:10,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:10,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:48:10,840 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)] === [2024-06-03 20:48:10,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:10,841 INFO L85 PathProgramCache]: Analyzing trace with hash -73855846, now seen corresponding path program 7 times [2024-06-03 20:48:10,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:10,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498268603] [2024-06-03 20:48:10,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:10,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:10,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:11,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:11,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498268603] [2024-06-03 20:48:11,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498268603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:11,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:11,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:11,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585585787] [2024-06-03 20:48:11,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:11,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:11,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:11,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:11,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:11,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:11,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 210 transitions, 2599 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:11,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:11,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:11,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:11,597 INFO L124 PetriNetUnfolderBase]: 1955/3314 cut-off events. [2024-06-03 20:48:11,597 INFO L125 PetriNetUnfolderBase]: For 233060/233060 co-relation queries the response was YES. [2024-06-03 20:48:11,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23066 conditions, 3314 events. 1955/3314 cut-off events. For 233060/233060 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 20803 event pairs, 718 based on Foata normal form. 26/3335 useless extension candidates. Maximal degree in co-relation 22962. Up to 2829 conditions per place. [2024-06-03 20:48:11,630 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 138 selfloop transitions, 73 changer transitions 15/232 dead transitions. [2024-06-03 20:48:11,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 232 transitions, 3147 flow [2024-06-03 20:48:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:48:11,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:48:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 235 transitions. [2024-06-03 20:48:11,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895833333333333 [2024-06-03 20:48:11,631 INFO L175 Difference]: Start difference. First operand has 237 places, 210 transitions, 2599 flow. Second operand 12 states and 235 transitions. [2024-06-03 20:48:11,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 232 transitions, 3147 flow [2024-06-03 20:48:12,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 232 transitions, 2991 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-03 20:48:12,461 INFO L231 Difference]: Finished difference. Result has 236 places, 204 transitions, 2541 flow [2024-06-03 20:48:12,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2443, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2541, PETRI_PLACES=236, PETRI_TRANSITIONS=204} [2024-06-03 20:48:12,461 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 195 predicate places. [2024-06-03 20:48:12,461 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 204 transitions, 2541 flow [2024-06-03 20:48:12,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:12,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:12,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:12,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:48:12,462 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)] === [2024-06-03 20:48:12,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:12,462 INFO L85 PathProgramCache]: Analyzing trace with hash -63845326, now seen corresponding path program 8 times [2024-06-03 20:48:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:12,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171054414] [2024-06-03 20:48:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:12,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:12,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:12,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171054414] [2024-06-03 20:48:12,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171054414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:12,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:12,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:12,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293409218] [2024-06-03 20:48:12,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:12,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:12,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:12,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:12,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:12,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:12,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 204 transitions, 2541 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:12,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:12,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:12,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:13,206 INFO L124 PetriNetUnfolderBase]: 1937/3300 cut-off events. [2024-06-03 20:48:13,206 INFO L125 PetriNetUnfolderBase]: For 222231/222231 co-relation queries the response was YES. [2024-06-03 20:48:13,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22809 conditions, 3300 events. 1937/3300 cut-off events. For 222231/222231 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 20868 event pairs, 668 based on Foata normal form. 24/3319 useless extension candidates. Maximal degree in co-relation 22706. Up to 2490 conditions per place. [2024-06-03 20:48:13,238 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 144 selfloop transitions, 68 changer transitions 13/231 dead transitions. [2024-06-03 20:48:13,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 231 transitions, 3261 flow [2024-06-03 20:48:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:13,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:13,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-03 20:48:13,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225 [2024-06-03 20:48:13,239 INFO L175 Difference]: Start difference. First operand has 236 places, 204 transitions, 2541 flow. Second operand 10 states and 209 transitions. [2024-06-03 20:48:13,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 231 transitions, 3261 flow [2024-06-03 20:48:13,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 231 transitions, 3103 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-03 20:48:13,876 INFO L231 Difference]: Finished difference. Result has 230 places, 198 transitions, 2433 flow [2024-06-03 20:48:13,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2389, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2433, PETRI_PLACES=230, PETRI_TRANSITIONS=198} [2024-06-03 20:48:13,876 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 189 predicate places. [2024-06-03 20:48:13,876 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 198 transitions, 2433 flow [2024-06-03 20:48:13,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:13,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:13,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:13,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:48:13,877 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)] === [2024-06-03 20:48:13,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:13,877 INFO L85 PathProgramCache]: Analyzing trace with hash -68429296, now seen corresponding path program 9 times [2024-06-03 20:48:13,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:13,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358561370] [2024-06-03 20:48:13,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:13,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:13,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:14,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:14,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:14,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358561370] [2024-06-03 20:48:14,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358561370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:14,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:14,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:14,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210191636] [2024-06-03 20:48:14,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:14,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:14,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:14,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:14,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:14,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:14,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 198 transitions, 2433 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:14,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:14,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:14,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:14,594 INFO L124 PetriNetUnfolderBase]: 1934/3327 cut-off events. [2024-06-03 20:48:14,594 INFO L125 PetriNetUnfolderBase]: For 224801/224801 co-relation queries the response was YES. [2024-06-03 20:48:14,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23325 conditions, 3327 events. 1934/3327 cut-off events. For 224801/224801 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 21325 event pairs, 652 based on Foata normal form. 18/3340 useless extension candidates. Maximal degree in co-relation 23224. Up to 2336 conditions per place. [2024-06-03 20:48:14,627 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 144 selfloop transitions, 72 changer transitions 10/232 dead transitions. [2024-06-03 20:48:14,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 232 transitions, 3303 flow [2024-06-03 20:48:14,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:14,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-03 20:48:14,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-03 20:48:14,628 INFO L175 Difference]: Start difference. First operand has 230 places, 198 transitions, 2433 flow. Second operand 11 states and 231 transitions. [2024-06-03 20:48:14,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 232 transitions, 3303 flow [2024-06-03 20:48:15,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 232 transitions, 3146 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-03 20:48:15,463 INFO L231 Difference]: Finished difference. Result has 229 places, 195 transitions, 2405 flow [2024-06-03 20:48:15,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2405, PETRI_PLACES=229, PETRI_TRANSITIONS=195} [2024-06-03 20:48:15,463 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-03 20:48:15,463 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 195 transitions, 2405 flow [2024-06-03 20:48:15,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:15,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:15,463 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] [2024-06-03 20:48:15,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:48:15,464 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)] === [2024-06-03 20:48:15,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1539081660, now seen corresponding path program 10 times [2024-06-03 20:48:15,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:15,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343620684] [2024-06-03 20:48:15,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:15,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:15,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:15,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:15,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343620684] [2024-06-03 20:48:15,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343620684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:15,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:15,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:15,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247194186] [2024-06-03 20:48:15,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:15,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:15,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:15,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:15,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:15,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:15,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 195 transitions, 2405 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:15,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:15,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:15,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:16,167 INFO L124 PetriNetUnfolderBase]: 1805/3100 cut-off events. [2024-06-03 20:48:16,167 INFO L125 PetriNetUnfolderBase]: For 190996/190996 co-relation queries the response was YES. [2024-06-03 20:48:16,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21277 conditions, 3100 events. 1805/3100 cut-off events. For 190996/190996 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 19639 event pairs, 638 based on Foata normal form. 18/3113 useless extension candidates. Maximal degree in co-relation 21176. Up to 2336 conditions per place. [2024-06-03 20:48:16,197 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 136 selfloop transitions, 68 changer transitions 15/225 dead transitions. [2024-06-03 20:48:16,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 225 transitions, 3115 flow [2024-06-03 20:48:16,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:16,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 227 transitions. [2024-06-03 20:48:16,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159090909090909 [2024-06-03 20:48:16,198 INFO L175 Difference]: Start difference. First operand has 229 places, 195 transitions, 2405 flow. Second operand 11 states and 227 transitions. [2024-06-03 20:48:16,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 225 transitions, 3115 flow [2024-06-03 20:48:16,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 225 transitions, 2961 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-03 20:48:16,983 INFO L231 Difference]: Finished difference. Result has 226 places, 190 transitions, 2315 flow [2024-06-03 20:48:16,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2315, PETRI_PLACES=226, PETRI_TRANSITIONS=190} [2024-06-03 20:48:16,984 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 185 predicate places. [2024-06-03 20:48:16,984 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 190 transitions, 2315 flow [2024-06-03 20:48:16,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:16,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:16,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:16,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:48:16,984 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)] === [2024-06-03 20:48:16,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:16,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1539200700, now seen corresponding path program 11 times [2024-06-03 20:48:16,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:16,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895455042] [2024-06-03 20:48:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:16,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:17,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:17,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:17,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895455042] [2024-06-03 20:48:17,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895455042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:17,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:17,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:17,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113982909] [2024-06-03 20:48:17,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:17,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:17,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:17,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:17,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:17,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:17,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 190 transitions, 2315 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:17,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:17,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:17,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:17,632 INFO L124 PetriNetUnfolderBase]: 1674/2859 cut-off events. [2024-06-03 20:48:17,632 INFO L125 PetriNetUnfolderBase]: For 164111/164111 co-relation queries the response was YES. [2024-06-03 20:48:17,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18737 conditions, 2859 events. 1674/2859 cut-off events. For 164111/164111 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 17589 event pairs, 615 based on Foata normal form. 26/2880 useless extension candidates. Maximal degree in co-relation 18638. Up to 2398 conditions per place. [2024-06-03 20:48:17,657 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 128 selfloop transitions, 57 changer transitions 19/210 dead transitions. [2024-06-03 20:48:17,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 210 transitions, 2815 flow [2024-06-03 20:48:17,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:17,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:17,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-03 20:48:17,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-06-03 20:48:17,658 INFO L175 Difference]: Start difference. First operand has 226 places, 190 transitions, 2315 flow. Second operand 10 states and 202 transitions. [2024-06-03 20:48:17,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 210 transitions, 2815 flow [2024-06-03 20:48:18,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 210 transitions, 2612 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-03 20:48:18,153 INFO L231 Difference]: Finished difference. Result has 220 places, 179 transitions, 2114 flow [2024-06-03 20:48:18,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2112, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2114, PETRI_PLACES=220, PETRI_TRANSITIONS=179} [2024-06-03 20:48:18,153 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 179 predicate places. [2024-06-03 20:48:18,153 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 179 transitions, 2114 flow [2024-06-03 20:48:18,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:18,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:18,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:18,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:48:18,154 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)] === [2024-06-03 20:48:18,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:18,154 INFO L85 PathProgramCache]: Analyzing trace with hash 275413730, now seen corresponding path program 12 times [2024-06-03 20:48:18,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:18,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004071975] [2024-06-03 20:48:18,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:18,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:18,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:18,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:18,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:18,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004071975] [2024-06-03 20:48:18,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004071975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:18,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:18,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:18,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601572401] [2024-06-03 20:48:18,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:18,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:18,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:18,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:18,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:18,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:18,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 179 transitions, 2114 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:18,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:18,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:18,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:18,811 INFO L124 PetriNetUnfolderBase]: 1774/3023 cut-off events. [2024-06-03 20:48:18,811 INFO L125 PetriNetUnfolderBase]: For 198560/198560 co-relation queries the response was YES. [2024-06-03 20:48:18,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20586 conditions, 3023 events. 1774/3023 cut-off events. For 198560/198560 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 18934 event pairs, 644 based on Foata normal form. 24/3043 useless extension candidates. Maximal degree in co-relation 20489. Up to 2336 conditions per place. [2024-06-03 20:48:18,841 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 149 selfloop transitions, 39 changer transitions 10/204 dead transitions. [2024-06-03 20:48:18,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 204 transitions, 2770 flow [2024-06-03 20:48:18,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:18,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 20:48:18,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54375 [2024-06-03 20:48:18,842 INFO L175 Difference]: Start difference. First operand has 220 places, 179 transitions, 2114 flow. Second operand 8 states and 174 transitions. [2024-06-03 20:48:18,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 204 transitions, 2770 flow [2024-06-03 20:48:19,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 204 transitions, 2630 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-03 20:48:19,313 INFO L231 Difference]: Finished difference. Result has 209 places, 176 transitions, 2000 flow [2024-06-03 20:48:19,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2000, PETRI_PLACES=209, PETRI_TRANSITIONS=176} [2024-06-03 20:48:19,314 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-03 20:48:19,314 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 176 transitions, 2000 flow [2024-06-03 20:48:19,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:19,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:19,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:19,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:48:19,314 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)] === [2024-06-03 20:48:19,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:19,315 INFO L85 PathProgramCache]: Analyzing trace with hash 445936670, now seen corresponding path program 13 times [2024-06-03 20:48:19,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:19,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583533168] [2024-06-03 20:48:19,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:19,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:19,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:19,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:19,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583533168] [2024-06-03 20:48:19,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583533168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:19,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:19,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:19,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677153898] [2024-06-03 20:48:19,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:19,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:19,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:19,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:19,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:19,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:19,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 176 transitions, 2000 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:19,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:19,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:19,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:19,992 INFO L124 PetriNetUnfolderBase]: 1750/2987 cut-off events. [2024-06-03 20:48:19,992 INFO L125 PetriNetUnfolderBase]: For 187265/187265 co-relation queries the response was YES. [2024-06-03 20:48:20,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20060 conditions, 2987 events. 1750/2987 cut-off events. For 187265/187265 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 18722 event pairs, 700 based on Foata normal form. 26/3009 useless extension candidates. Maximal degree in co-relation 19966. Up to 2579 conditions per place. [2024-06-03 20:48:20,021 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 142 selfloop transitions, 35 changer transitions 12/195 dead transitions. [2024-06-03 20:48:20,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 195 transitions, 2468 flow [2024-06-03 20:48:20,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:20,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:20,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-03 20:48:20,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-03 20:48:20,022 INFO L175 Difference]: Start difference. First operand has 209 places, 176 transitions, 2000 flow. Second operand 9 states and 185 transitions. [2024-06-03 20:48:20,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 195 transitions, 2468 flow [2024-06-03 20:48:20,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 195 transitions, 2385 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:20,597 INFO L231 Difference]: Finished difference. Result has 209 places, 172 transitions, 1948 flow [2024-06-03 20:48:20,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1917, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1948, PETRI_PLACES=209, PETRI_TRANSITIONS=172} [2024-06-03 20:48:20,597 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 168 predicate places. [2024-06-03 20:48:20,597 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 172 transitions, 1948 flow [2024-06-03 20:48:20,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:20,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:20,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:20,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:48:20,598 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)] === [2024-06-03 20:48:20,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:20,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2009165828, now seen corresponding path program 14 times [2024-06-03 20:48:20,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:20,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111706829] [2024-06-03 20:48:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:20,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:20,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:20,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:20,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:20,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111706829] [2024-06-03 20:48:20,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111706829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:20,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:20,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:20,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124751456] [2024-06-03 20:48:20,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:20,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:20,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:20,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:20,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:20,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:20,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 172 transitions, 1948 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:20,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:20,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:20,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:21,223 INFO L124 PetriNetUnfolderBase]: 1616/2771 cut-off events. [2024-06-03 20:48:21,224 INFO L125 PetriNetUnfolderBase]: For 150660/150660 co-relation queries the response was YES. [2024-06-03 20:48:21,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17604 conditions, 2771 events. 1616/2771 cut-off events. For 150660/150660 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17099 event pairs, 623 based on Foata normal form. 26/2793 useless extension candidates. Maximal degree in co-relation 17510. Up to 2368 conditions per place. [2024-06-03 20:48:21,248 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 141 selfloop transitions, 31 changer transitions 12/190 dead transitions. [2024-06-03 20:48:21,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 190 transitions, 2404 flow [2024-06-03 20:48:21,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-03 20:48:21,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51875 [2024-06-03 20:48:21,249 INFO L175 Difference]: Start difference. First operand has 209 places, 172 transitions, 1948 flow. Second operand 8 states and 166 transitions. [2024-06-03 20:48:21,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 190 transitions, 2404 flow [2024-06-03 20:48:21,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 190 transitions, 2330 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:21,809 INFO L231 Difference]: Finished difference. Result has 206 places, 168 transitions, 1903 flow [2024-06-03 20:48:21,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1903, PETRI_PLACES=206, PETRI_TRANSITIONS=168} [2024-06-03 20:48:21,809 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-03 20:48:21,809 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 168 transitions, 1903 flow [2024-06-03 20:48:21,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:21,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:21,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:21,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:48:21,809 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)] === [2024-06-03 20:48:21,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash -115767114, now seen corresponding path program 15 times [2024-06-03 20:48:21,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:21,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911896937] [2024-06-03 20:48:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:21,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:21,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:22,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:22,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:22,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911896937] [2024-06-03 20:48:22,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911896937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:22,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:22,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:22,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870746702] [2024-06-03 20:48:22,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:22,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:22,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:22,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:22,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:22,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:22,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 168 transitions, 1903 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:22,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:22,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:22,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:22,440 INFO L124 PetriNetUnfolderBase]: 1601/2764 cut-off events. [2024-06-03 20:48:22,440 INFO L125 PetriNetUnfolderBase]: For 141386/141386 co-relation queries the response was YES. [2024-06-03 20:48:22,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17397 conditions, 2764 events. 1601/2764 cut-off events. For 141386/141386 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 17209 event pairs, 575 based on Foata normal form. 24/2784 useless extension candidates. Maximal degree in co-relation 17304. Up to 2288 conditions per place. [2024-06-03 20:48:22,506 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 145 selfloop transitions, 29 changer transitions 11/191 dead transitions. [2024-06-03 20:48:22,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 191 transitions, 2401 flow [2024-06-03 20:48:22,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:22,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-03 20:48:22,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5194444444444445 [2024-06-03 20:48:22,507 INFO L175 Difference]: Start difference. First operand has 206 places, 168 transitions, 1903 flow. Second operand 9 states and 187 transitions. [2024-06-03 20:48:22,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 191 transitions, 2401 flow [2024-06-03 20:48:22,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 191 transitions, 2331 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:23,001 INFO L231 Difference]: Finished difference. Result has 206 places, 164 transitions, 1831 flow [2024-06-03 20:48:23,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1831, PETRI_PLACES=206, PETRI_TRANSITIONS=164} [2024-06-03 20:48:23,001 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 165 predicate places. [2024-06-03 20:48:23,001 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 164 transitions, 1831 flow [2024-06-03 20:48:23,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:23,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:23,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:23,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:48:23,002 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)] === [2024-06-03 20:48:23,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:23,002 INFO L85 PathProgramCache]: Analyzing trace with hash -2009313698, now seen corresponding path program 16 times [2024-06-03 20:48:23,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:23,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708321982] [2024-06-03 20:48:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:23,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:23,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:23,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708321982] [2024-06-03 20:48:23,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708321982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:23,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:23,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:23,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230856856] [2024-06-03 20:48:23,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:23,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:23,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:23,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:23,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:23,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:23,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 164 transitions, 1831 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:23,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:23,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:23,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:23,669 INFO L124 PetriNetUnfolderBase]: 1723/2944 cut-off events. [2024-06-03 20:48:23,669 INFO L125 PetriNetUnfolderBase]: For 177995/177995 co-relation queries the response was YES. [2024-06-03 20:48:23,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19569 conditions, 2944 events. 1723/2944 cut-off events. For 177995/177995 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 18288 event pairs, 652 based on Foata normal form. 24/2964 useless extension candidates. Maximal degree in co-relation 19476. Up to 2310 conditions per place. [2024-06-03 20:48:23,695 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 148 selfloop transitions, 25 changer transitions 11/190 dead transitions. [2024-06-03 20:48:23,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 190 transitions, 2465 flow [2024-06-03 20:48:23,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:23,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 20:48:23,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-03 20:48:23,696 INFO L175 Difference]: Start difference. First operand has 206 places, 164 transitions, 1831 flow. Second operand 8 states and 170 transitions. [2024-06-03 20:48:23,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 190 transitions, 2465 flow [2024-06-03 20:48:24,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 190 transitions, 2396 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:24,290 INFO L231 Difference]: Finished difference. Result has 204 places, 161 transitions, 1777 flow [2024-06-03 20:48:24,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1764, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1777, PETRI_PLACES=204, PETRI_TRANSITIONS=161} [2024-06-03 20:48:24,290 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 163 predicate places. [2024-06-03 20:48:24,290 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 161 transitions, 1777 flow [2024-06-03 20:48:24,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:24,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:24,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:24,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:48:24,291 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)] === [2024-06-03 20:48:24,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:24,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1999334798, now seen corresponding path program 17 times [2024-06-03 20:48:24,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:24,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789645567] [2024-06-03 20:48:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:24,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:24,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:24,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:24,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:24,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789645567] [2024-06-03 20:48:24,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789645567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:24,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:24,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:24,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376015321] [2024-06-03 20:48:24,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:24,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:24,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:24,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:24,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:24,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:24,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 161 transitions, 1777 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:24,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:24,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:24,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:24,896 INFO L124 PetriNetUnfolderBase]: 1571/2682 cut-off events. [2024-06-03 20:48:24,896 INFO L125 PetriNetUnfolderBase]: For 145755/145755 co-relation queries the response was YES. [2024-06-03 20:48:24,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16996 conditions, 2682 events. 1571/2682 cut-off events. For 145755/145755 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 16313 event pairs, 607 based on Foata normal form. 26/2704 useless extension candidates. Maximal degree in co-relation 16902. Up to 2310 conditions per place. [2024-06-03 20:48:24,918 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 138 selfloop transitions, 22 changer transitions 13/179 dead transitions. [2024-06-03 20:48:24,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 179 transitions, 2211 flow [2024-06-03 20:48:24,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:24,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:24,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-03 20:48:24,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-03 20:48:24,919 INFO L175 Difference]: Start difference. First operand has 204 places, 161 transitions, 1777 flow. Second operand 8 states and 165 transitions. [2024-06-03 20:48:24,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 179 transitions, 2211 flow [2024-06-03 20:48:25,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 179 transitions, 2133 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:25,473 INFO L231 Difference]: Finished difference. Result has 201 places, 156 transitions, 1692 flow [2024-06-03 20:48:25,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1692, PETRI_PLACES=201, PETRI_TRANSITIONS=156} [2024-06-03 20:48:25,473 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-03 20:48:25,473 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 156 transitions, 1692 flow [2024-06-03 20:48:25,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:25,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:25,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:25,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:48:25,473 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)] === [2024-06-03 20:48:25,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:25,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2003749508, now seen corresponding path program 18 times [2024-06-03 20:48:25,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:25,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920887928] [2024-06-03 20:48:25,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:25,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:25,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:25,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:25,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920887928] [2024-06-03 20:48:25,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920887928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:25,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:25,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:25,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694081011] [2024-06-03 20:48:25,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:25,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:25,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:25,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:25,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:25,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:25,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 156 transitions, 1692 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:25,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:25,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:25,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:26,156 INFO L124 PetriNetUnfolderBase]: 1636/2817 cut-off events. [2024-06-03 20:48:26,156 INFO L125 PetriNetUnfolderBase]: For 157557/157557 co-relation queries the response was YES. [2024-06-03 20:48:26,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18271 conditions, 2817 events. 1636/2817 cut-off events. For 157557/157557 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 17399 event pairs, 462 based on Foata normal form. 18/2831 useless extension candidates. Maximal degree in co-relation 18179. Up to 2152 conditions per place. [2024-06-03 20:48:26,179 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 146 selfloop transitions, 27 changer transitions 8/187 dead transitions. [2024-06-03 20:48:26,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 187 transitions, 2330 flow [2024-06-03 20:48:26,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:26,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:26,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-03 20:48:26,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.546875 [2024-06-03 20:48:26,180 INFO L175 Difference]: Start difference. First operand has 201 places, 156 transitions, 1692 flow. Second operand 8 states and 175 transitions. [2024-06-03 20:48:26,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 187 transitions, 2330 flow [2024-06-03 20:48:26,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 187 transitions, 2250 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-03 20:48:26,762 INFO L231 Difference]: Finished difference. Result has 197 places, 155 transitions, 1658 flow [2024-06-03 20:48:26,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1658, PETRI_PLACES=197, PETRI_TRANSITIONS=155} [2024-06-03 20:48:26,763 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-03 20:48:26,763 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 155 transitions, 1658 flow [2024-06-03 20:48:26,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:26,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:26,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:26,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:48:26,763 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)] === [2024-06-03 20:48:26,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:26,763 INFO L85 PathProgramCache]: Analyzing trace with hash -2003739278, now seen corresponding path program 19 times [2024-06-03 20:48:26,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:26,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957805170] [2024-06-03 20:48:26,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:26,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:26,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:26,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:26,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957805170] [2024-06-03 20:48:26,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957805170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:26,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:26,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:26,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185103600] [2024-06-03 20:48:26,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:26,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:26,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:26,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:26,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:27,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:27,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 155 transitions, 1658 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:27,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:27,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:27,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:27,388 INFO L124 PetriNetUnfolderBase]: 1531/2630 cut-off events. [2024-06-03 20:48:27,388 INFO L125 PetriNetUnfolderBase]: For 134555/134555 co-relation queries the response was YES. [2024-06-03 20:48:27,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16590 conditions, 2630 events. 1531/2630 cut-off events. For 134555/134555 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15975 event pairs, 438 based on Foata normal form. 18/2644 useless extension candidates. Maximal degree in co-relation 16499. Up to 2152 conditions per place. [2024-06-03 20:48:27,410 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 141 selfloop transitions, 25 changer transitions 10/182 dead transitions. [2024-06-03 20:48:27,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 182 transitions, 2146 flow [2024-06-03 20:48:27,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:27,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:27,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-03 20:48:27,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-03 20:48:27,411 INFO L175 Difference]: Start difference. First operand has 197 places, 155 transitions, 1658 flow. Second operand 8 states and 172 transitions. [2024-06-03 20:48:27,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 182 transitions, 2146 flow [2024-06-03 20:48:28,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 182 transitions, 2088 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:28,049 INFO L231 Difference]: Finished difference. Result has 197 places, 151 transitions, 1599 flow [2024-06-03 20:48:28,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1600, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1599, PETRI_PLACES=197, PETRI_TRANSITIONS=151} [2024-06-03 20:48:28,050 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 156 predicate places. [2024-06-03 20:48:28,050 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 151 transitions, 1599 flow [2024-06-03 20:48:28,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:28,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:28,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:28,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:48:28,050 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)] === [2024-06-03 20:48:28,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:28,050 INFO L85 PathProgramCache]: Analyzing trace with hash 120472788, now seen corresponding path program 1 times [2024-06-03 20:48:28,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:28,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248694636] [2024-06-03 20:48:28,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:28,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:28,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:28,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248694636] [2024-06-03 20:48:28,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248694636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:28,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:28,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:28,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470606124] [2024-06-03 20:48:28,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:28,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:28,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:28,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:28,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:28,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:28,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 151 transitions, 1599 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:28,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:28,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:28,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:28,675 INFO L124 PetriNetUnfolderBase]: 1504/2579 cut-off events. [2024-06-03 20:48:28,675 INFO L125 PetriNetUnfolderBase]: For 133608/133608 co-relation queries the response was YES. [2024-06-03 20:48:28,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16309 conditions, 2579 events. 1504/2579 cut-off events. For 133608/133608 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15595 event pairs, 500 based on Foata normal form. 18/2593 useless extension candidates. Maximal degree in co-relation 16219. Up to 2234 conditions per place. [2024-06-03 20:48:28,698 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 138 selfloop transitions, 12 changer transitions 12/168 dead transitions. [2024-06-03 20:48:28,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 168 transitions, 2011 flow [2024-06-03 20:48:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:28,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 20:48:28,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107142857142857 [2024-06-03 20:48:28,699 INFO L175 Difference]: Start difference. First operand has 197 places, 151 transitions, 1599 flow. Second operand 7 states and 143 transitions. [2024-06-03 20:48:28,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 168 transitions, 2011 flow [2024-06-03 20:48:29,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 168 transitions, 1908 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-03 20:48:29,273 INFO L231 Difference]: Finished difference. Result has 190 places, 149 transitions, 1498 flow [2024-06-03 20:48:29,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1498, PETRI_PLACES=190, PETRI_TRANSITIONS=149} [2024-06-03 20:48:29,273 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-03 20:48:29,273 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 149 transitions, 1498 flow [2024-06-03 20:48:29,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:29,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:29,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:29,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:48:29,274 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)] === [2024-06-03 20:48:29,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:29,274 INFO L85 PathProgramCache]: Analyzing trace with hash 120592758, now seen corresponding path program 2 times [2024-06-03 20:48:29,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:29,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872013397] [2024-06-03 20:48:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:29,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:29,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:29,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872013397] [2024-06-03 20:48:29,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872013397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:29,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:29,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:48:29,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540411818] [2024-06-03 20:48:29,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:29,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:48:29,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:29,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:48:29,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:48:29,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:29,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 149 transitions, 1498 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:29,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:29,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:29,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:29,867 INFO L124 PetriNetUnfolderBase]: 1480/2527 cut-off events. [2024-06-03 20:48:29,867 INFO L125 PetriNetUnfolderBase]: For 133573/133573 co-relation queries the response was YES. [2024-06-03 20:48:29,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15901 conditions, 2527 events. 1480/2527 cut-off events. For 133573/133573 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15156 event pairs, 479 based on Foata normal form. 18/2541 useless extension candidates. Maximal degree in co-relation 15813. Up to 2092 conditions per place. [2024-06-03 20:48:29,887 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 134 selfloop transitions, 23 changer transitions 11/174 dead transitions. [2024-06-03 20:48:29,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 174 transitions, 1968 flow [2024-06-03 20:48:29,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-03 20:48:29,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2024-06-03 20:48:29,888 INFO L175 Difference]: Start difference. First operand has 190 places, 149 transitions, 1498 flow. Second operand 9 states and 184 transitions. [2024-06-03 20:48:29,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 174 transitions, 1968 flow [2024-06-03 20:48:30,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 174 transitions, 1916 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:30,450 INFO L231 Difference]: Finished difference. Result has 190 places, 144 transitions, 1451 flow [2024-06-03 20:48:30,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1446, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1451, PETRI_PLACES=190, PETRI_TRANSITIONS=144} [2024-06-03 20:48:30,450 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 149 predicate places. [2024-06-03 20:48:30,450 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 144 transitions, 1451 flow [2024-06-03 20:48:30,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:30,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:30,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:30,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:48:30,451 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)] === [2024-06-03 20:48:30,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:30,451 INFO L85 PathProgramCache]: Analyzing trace with hash 210948212, now seen corresponding path program 20 times [2024-06-03 20:48:30,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:30,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940294661] [2024-06-03 20:48:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:30,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:30,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:30,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:30,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940294661] [2024-06-03 20:48:30,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940294661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:30,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:30,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:30,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163892877] [2024-06-03 20:48:30,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:30,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:30,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:30,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:30,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:30,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:30,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 144 transitions, 1451 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:30,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:30,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:30,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:31,208 INFO L124 PetriNetUnfolderBase]: 1719/2966 cut-off events. [2024-06-03 20:48:31,209 INFO L125 PetriNetUnfolderBase]: For 212784/212784 co-relation queries the response was YES. [2024-06-03 20:48:31,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20756 conditions, 2966 events. 1719/2966 cut-off events. For 212784/212784 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 18635 event pairs, 401 based on Foata normal form. 18/2982 useless extension candidates. Maximal degree in co-relation 20669. Up to 1561 conditions per place. [2024-06-03 20:48:31,233 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 131 selfloop transitions, 36 changer transitions 16/189 dead transitions. [2024-06-03 20:48:31,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 189 transitions, 2303 flow [2024-06-03 20:48:31,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:31,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-03 20:48:31,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-03 20:48:31,234 INFO L175 Difference]: Start difference. First operand has 190 places, 144 transitions, 1451 flow. Second operand 10 states and 215 transitions. [2024-06-03 20:48:31,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 189 transitions, 2303 flow [2024-06-03 20:48:31,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 189 transitions, 2227 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-03 20:48:31,866 INFO L231 Difference]: Finished difference. Result has 185 places, 141 transitions, 1422 flow [2024-06-03 20:48:31,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1422, PETRI_PLACES=185, PETRI_TRANSITIONS=141} [2024-06-03 20:48:31,866 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-03 20:48:31,866 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 141 transitions, 1422 flow [2024-06-03 20:48:31,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:31,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:31,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:31,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:48:31,866 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)] === [2024-06-03 20:48:31,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:31,867 INFO L85 PathProgramCache]: Analyzing trace with hash -276672786, now seen corresponding path program 21 times [2024-06-03 20:48:31,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:31,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299442343] [2024-06-03 20:48:31,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:31,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:32,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:32,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:32,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299442343] [2024-06-03 20:48:32,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299442343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:32,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:32,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:32,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686832373] [2024-06-03 20:48:32,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:32,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:32,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:32,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:32,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:32,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:32,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 141 transitions, 1422 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:32,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:32,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:32,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:32,569 INFO L124 PetriNetUnfolderBase]: 1729/2970 cut-off events. [2024-06-03 20:48:32,569 INFO L125 PetriNetUnfolderBase]: For 234992/234996 co-relation queries the response was YES. [2024-06-03 20:48:32,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21726 conditions, 2970 events. 1729/2970 cut-off events. For 234992/234996 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 18877 event pairs, 471 based on Foata normal form. 22/2990 useless extension candidates. Maximal degree in co-relation 21641. Up to 1561 conditions per place. [2024-06-03 20:48:32,594 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 136 selfloop transitions, 29 changer transitions 8/179 dead transitions. [2024-06-03 20:48:32,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 179 transitions, 2220 flow [2024-06-03 20:48:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-03 20:48:32,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5472222222222223 [2024-06-03 20:48:32,595 INFO L175 Difference]: Start difference. First operand has 185 places, 141 transitions, 1422 flow. Second operand 9 states and 197 transitions. [2024-06-03 20:48:32,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 179 transitions, 2220 flow [2024-06-03 20:48:33,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 179 transitions, 2143 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:33,204 INFO L231 Difference]: Finished difference. Result has 182 places, 139 transitions, 1395 flow [2024-06-03 20:48:33,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1395, PETRI_PLACES=182, PETRI_TRANSITIONS=139} [2024-06-03 20:48:33,204 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2024-06-03 20:48:33,204 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 139 transitions, 1395 flow [2024-06-03 20:48:33,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:33,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:33,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:33,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:48:33,205 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)] === [2024-06-03 20:48:33,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:33,205 INFO L85 PathProgramCache]: Analyzing trace with hash -276683016, now seen corresponding path program 22 times [2024-06-03 20:48:33,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:33,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146709295] [2024-06-03 20:48:33,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:33,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:33,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:33,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:33,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146709295] [2024-06-03 20:48:33,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146709295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:33,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:33,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:33,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402630731] [2024-06-03 20:48:33,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:33,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:33,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:33,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:33,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:33,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:33,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 139 transitions, 1395 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:33,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:33,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:33,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:33,918 INFO L124 PetriNetUnfolderBase]: 1624/2779 cut-off events. [2024-06-03 20:48:33,918 INFO L125 PetriNetUnfolderBase]: For 204847/204851 co-relation queries the response was YES. [2024-06-03 20:48:33,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19939 conditions, 2779 events. 1624/2779 cut-off events. For 204847/204851 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 17349 event pairs, 495 based on Foata normal form. 22/2799 useless extension candidates. Maximal degree in co-relation 19855. Up to 1561 conditions per place. [2024-06-03 20:48:33,942 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 129 selfloop transitions, 27 changer transitions 14/176 dead transitions. [2024-06-03 20:48:33,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 176 transitions, 2061 flow [2024-06-03 20:48:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-03 20:48:33,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5225 [2024-06-03 20:48:33,943 INFO L175 Difference]: Start difference. First operand has 182 places, 139 transitions, 1395 flow. Second operand 10 states and 209 transitions. [2024-06-03 20:48:33,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 176 transitions, 2061 flow [2024-06-03 20:48:34,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 176 transitions, 1992 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:34,396 INFO L231 Difference]: Finished difference. Result has 181 places, 135 transitions, 1352 flow [2024-06-03 20:48:34,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1328, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1352, PETRI_PLACES=181, PETRI_TRANSITIONS=135} [2024-06-03 20:48:34,396 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 140 predicate places. [2024-06-03 20:48:34,396 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 135 transitions, 1352 flow [2024-06-03 20:48:34,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:34,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:34,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:34,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:48:34,397 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)] === [2024-06-03 20:48:34,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:34,397 INFO L85 PathProgramCache]: Analyzing trace with hash -696340140, now seen corresponding path program 23 times [2024-06-03 20:48:34,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:34,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844005600] [2024-06-03 20:48:34,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:34,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:34,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:34,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:34,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844005600] [2024-06-03 20:48:34,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844005600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:34,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:34,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:34,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550395281] [2024-06-03 20:48:34,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:34,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:34,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:34,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:34,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:34,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:34,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 135 transitions, 1352 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:34,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:34,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:34,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:35,042 INFO L124 PetriNetUnfolderBase]: 1673/2864 cut-off events. [2024-06-03 20:48:35,042 INFO L125 PetriNetUnfolderBase]: For 226337/226341 co-relation queries the response was YES. [2024-06-03 20:48:35,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21166 conditions, 2864 events. 1673/2864 cut-off events. For 226337/226341 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 17981 event pairs, 782 based on Foata normal form. 18/2880 useless extension candidates. Maximal degree in co-relation 21083. Up to 2079 conditions per place. [2024-06-03 20:48:35,065 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 87 selfloop transitions, 51 changer transitions 27/171 dead transitions. [2024-06-03 20:48:35,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 171 transitions, 1956 flow [2024-06-03 20:48:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:35,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:35,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-03 20:48:35,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-06-03 20:48:35,067 INFO L175 Difference]: Start difference. First operand has 181 places, 135 transitions, 1352 flow. Second operand 11 states and 225 transitions. [2024-06-03 20:48:35,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 171 transitions, 1956 flow [2024-06-03 20:48:35,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 171 transitions, 1892 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:35,493 INFO L231 Difference]: Finished difference. Result has 179 places, 130 transitions, 1343 flow [2024-06-03 20:48:35,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1343, PETRI_PLACES=179, PETRI_TRANSITIONS=130} [2024-06-03 20:48:35,494 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 138 predicate places. [2024-06-03 20:48:35,495 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 130 transitions, 1343 flow [2024-06-03 20:48:35,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:35,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:35,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:35,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:48:35,497 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)] === [2024-06-03 20:48:35,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:35,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1849459824, now seen corresponding path program 24 times [2024-06-03 20:48:35,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:35,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744312303] [2024-06-03 20:48:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:35,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:35,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:35,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:35,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:35,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744312303] [2024-06-03 20:48:35,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744312303] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:35,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:35,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:35,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142849545] [2024-06-03 20:48:35,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:35,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:35,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:35,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:35,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:35,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:35,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 130 transitions, 1343 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:35,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:35,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:35,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:36,158 INFO L124 PetriNetUnfolderBase]: 1637/2804 cut-off events. [2024-06-03 20:48:36,159 INFO L125 PetriNetUnfolderBase]: For 227182/227182 co-relation queries the response was YES. [2024-06-03 20:48:36,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20904 conditions, 2804 events. 1637/2804 cut-off events. For 227182/227182 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17701 event pairs, 752 based on Foata normal form. 24/2826 useless extension candidates. Maximal degree in co-relation 20822. Up to 2074 conditions per place. [2024-06-03 20:48:36,183 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 87 selfloop transitions, 51 changer transitions 19/163 dead transitions. [2024-06-03 20:48:36,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 163 transitions, 1953 flow [2024-06-03 20:48:36,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:48:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:48:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 241 transitions. [2024-06-03 20:48:36,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5020833333333333 [2024-06-03 20:48:36,184 INFO L175 Difference]: Start difference. First operand has 179 places, 130 transitions, 1343 flow. Second operand 12 states and 241 transitions. [2024-06-03 20:48:36,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 163 transitions, 1953 flow [2024-06-03 20:48:36,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 163 transitions, 1870 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:36,770 INFO L231 Difference]: Finished difference. Result has 173 places, 126 transitions, 1325 flow [2024-06-03 20:48:36,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1268, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1325, PETRI_PLACES=173, PETRI_TRANSITIONS=126} [2024-06-03 20:48:36,771 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 132 predicate places. [2024-06-03 20:48:36,771 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 126 transitions, 1325 flow [2024-06-03 20:48:36,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:36,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:36,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:36,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:48:36,771 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)] === [2024-06-03 20:48:36,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:36,771 INFO L85 PathProgramCache]: Analyzing trace with hash 880588774, now seen corresponding path program 25 times [2024-06-03 20:48:36,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:36,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103550071] [2024-06-03 20:48:36,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:36,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:36,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:37,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:37,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:37,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103550071] [2024-06-03 20:48:37,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103550071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:37,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:37,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:37,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307327194] [2024-06-03 20:48:37,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:37,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:37,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:37,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:37,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:37,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:37,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 126 transitions, 1325 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:37,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:37,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:37,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:37,419 INFO L124 PetriNetUnfolderBase]: 1572/2705 cut-off events. [2024-06-03 20:48:37,419 INFO L125 PetriNetUnfolderBase]: For 200651/200651 co-relation queries the response was YES. [2024-06-03 20:48:37,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19872 conditions, 2705 events. 1572/2705 cut-off events. For 200651/200651 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 17011 event pairs, 795 based on Foata normal form. 26/2729 useless extension candidates. Maximal degree in co-relation 19794. Up to 2308 conditions per place. [2024-06-03 20:48:37,444 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 78 selfloop transitions, 48 changer transitions 15/147 dead transitions. [2024-06-03 20:48:37,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 147 transitions, 1701 flow [2024-06-03 20:48:37,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:37,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-03 20:48:37,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-03 20:48:37,446 INFO L175 Difference]: Start difference. First operand has 173 places, 126 transitions, 1325 flow. Second operand 11 states and 213 transitions. [2024-06-03 20:48:37,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 147 transitions, 1701 flow [2024-06-03 20:48:37,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 147 transitions, 1594 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-03 20:48:37,810 INFO L231 Difference]: Finished difference. Result has 169 places, 122 transitions, 1287 flow [2024-06-03 20:48:37,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1218, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1287, PETRI_PLACES=169, PETRI_TRANSITIONS=122} [2024-06-03 20:48:37,810 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 128 predicate places. [2024-06-03 20:48:37,810 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 122 transitions, 1287 flow [2024-06-03 20:48:37,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:37,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:37,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:37,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:48:37,811 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)] === [2024-06-03 20:48:37,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1209055996, now seen corresponding path program 26 times [2024-06-03 20:48:37,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:37,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907103160] [2024-06-03 20:48:37,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:37,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:38,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:38,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:38,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907103160] [2024-06-03 20:48:38,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907103160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:38,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:38,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:38,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102907005] [2024-06-03 20:48:38,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:38,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:38,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:38,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:38,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:38,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:38,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 122 transitions, 1287 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:38,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:38,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:38,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:38,438 INFO L124 PetriNetUnfolderBase]: 1443/2496 cut-off events. [2024-06-03 20:48:38,439 INFO L125 PetriNetUnfolderBase]: For 158178/158178 co-relation queries the response was YES. [2024-06-03 20:48:38,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17484 conditions, 2496 events. 1443/2496 cut-off events. For 158178/158178 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 15484 event pairs, 671 based on Foata normal form. 24/2518 useless extension candidates. Maximal degree in co-relation 17408. Up to 2074 conditions per place. [2024-06-03 20:48:38,458 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 75 selfloop transitions, 44 changer transitions 22/147 dead transitions. [2024-06-03 20:48:38,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 147 transitions, 1701 flow [2024-06-03 20:48:38,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:38,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-03 20:48:38,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-03 20:48:38,458 INFO L175 Difference]: Start difference. First operand has 169 places, 122 transitions, 1287 flow. Second operand 11 states and 214 transitions. [2024-06-03 20:48:38,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 147 transitions, 1701 flow [2024-06-03 20:48:38,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 147 transitions, 1601 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:38,687 INFO L231 Difference]: Finished difference. Result has 167 places, 117 transitions, 1233 flow [2024-06-03 20:48:38,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1233, PETRI_PLACES=167, PETRI_TRANSITIONS=117} [2024-06-03 20:48:38,687 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 126 predicate places. [2024-06-03 20:48:38,687 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 117 transitions, 1233 flow [2024-06-03 20:48:38,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:38,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:38,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:38,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:48:38,688 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)] === [2024-06-03 20:48:38,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:38,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1741963538, now seen corresponding path program 27 times [2024-06-03 20:48:38,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:38,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477821328] [2024-06-03 20:48:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:38,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:38,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:38,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477821328] [2024-06-03 20:48:38,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477821328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:38,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:38,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:38,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883443076] [2024-06-03 20:48:38,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:38,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:38,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:38,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:38,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:38,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:38,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 117 transitions, 1233 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:38,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:38,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:38,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:39,347 INFO L124 PetriNetUnfolderBase]: 1470/2551 cut-off events. [2024-06-03 20:48:39,347 INFO L125 PetriNetUnfolderBase]: For 162502/162502 co-relation queries the response was YES. [2024-06-03 20:48:39,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18235 conditions, 2551 events. 1470/2551 cut-off events. For 162502/162502 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15972 event pairs, 625 based on Foata normal form. 18/2567 useless extension candidates. Maximal degree in co-relation 18160. Up to 2003 conditions per place. [2024-06-03 20:48:39,366 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 110 selfloop transitions, 16 changer transitions 8/140 dead transitions. [2024-06-03 20:48:39,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 140 transitions, 1719 flow [2024-06-03 20:48:39,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:39,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:39,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-03 20:48:39,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-06-03 20:48:39,366 INFO L175 Difference]: Start difference. First operand has 167 places, 117 transitions, 1233 flow. Second operand 8 states and 165 transitions. [2024-06-03 20:48:39,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 140 transitions, 1719 flow [2024-06-03 20:48:39,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 140 transitions, 1599 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:39,613 INFO L231 Difference]: Finished difference. Result has 157 places, 115 transitions, 1147 flow [2024-06-03 20:48:39,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1131, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1147, PETRI_PLACES=157, PETRI_TRANSITIONS=115} [2024-06-03 20:48:39,613 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 116 predicate places. [2024-06-03 20:48:39,613 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 115 transitions, 1147 flow [2024-06-03 20:48:39,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:39,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:39,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:39,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:48:39,613 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)] === [2024-06-03 20:48:39,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:39,614 INFO L85 PathProgramCache]: Analyzing trace with hash 994568090, now seen corresponding path program 28 times [2024-06-03 20:48:39,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:39,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079200287] [2024-06-03 20:48:39,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:39,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:39,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:39,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079200287] [2024-06-03 20:48:39,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079200287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:39,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:39,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:39,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740462243] [2024-06-03 20:48:39,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:39,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:39,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:39,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:39,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:39,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:39,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 115 transitions, 1147 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:39,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:39,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:39,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:40,241 INFO L124 PetriNetUnfolderBase]: 1365/2360 cut-off events. [2024-06-03 20:48:40,242 INFO L125 PetriNetUnfolderBase]: For 127380/127384 co-relation queries the response was YES. [2024-06-03 20:48:40,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15793 conditions, 2360 events. 1365/2360 cut-off events. For 127380/127384 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 14465 event pairs, 605 based on Foata normal form. 22/2380 useless extension candidates. Maximal degree in co-relation 15721. Up to 2003 conditions per place. [2024-06-03 20:48:40,260 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 103 selfloop transitions, 15 changer transitions 13/137 dead transitions. [2024-06-03 20:48:40,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 137 transitions, 1511 flow [2024-06-03 20:48:40,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:40,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 20:48:40,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2024-06-03 20:48:40,260 INFO L175 Difference]: Start difference. First operand has 157 places, 115 transitions, 1147 flow. Second operand 9 states and 177 transitions. [2024-06-03 20:48:40,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 137 transitions, 1511 flow [2024-06-03 20:48:40,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 137 transitions, 1456 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:40,499 INFO L231 Difference]: Finished difference. Result has 155 places, 112 transitions, 1098 flow [2024-06-03 20:48:40,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1098, PETRI_PLACES=155, PETRI_TRANSITIONS=112} [2024-06-03 20:48:40,500 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 114 predicate places. [2024-06-03 20:48:40,500 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 112 transitions, 1098 flow [2024-06-03 20:48:40,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:40,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:40,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:40,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:48:40,500 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)] === [2024-06-03 20:48:40,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:40,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1729999088, now seen corresponding path program 29 times [2024-06-03 20:48:40,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:40,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397582660] [2024-06-03 20:48:40,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:40,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:40,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:40,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:40,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397582660] [2024-06-03 20:48:40,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397582660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:40,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:40,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:40,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571170444] [2024-06-03 20:48:40,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:40,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:40,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:40,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:40,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:40,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 112 transitions, 1098 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:40,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:40,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:40,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:41,082 INFO L124 PetriNetUnfolderBase]: 1337/2300 cut-off events. [2024-06-03 20:48:41,082 INFO L125 PetriNetUnfolderBase]: For 128083/128087 co-relation queries the response was YES. [2024-06-03 20:48:41,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15431 conditions, 2300 events. 1337/2300 cut-off events. For 128083/128087 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 13985 event pairs, 621 based on Foata normal form. 18/2316 useless extension candidates. Maximal degree in co-relation 15361. Up to 1920 conditions per place. [2024-06-03 20:48:41,099 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 63 selfloop transitions, 41 changer transitions 29/139 dead transitions. [2024-06-03 20:48:41,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 139 transitions, 1474 flow [2024-06-03 20:48:41,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:41,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-03 20:48:41,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-03 20:48:41,100 INFO L175 Difference]: Start difference. First operand has 155 places, 112 transitions, 1098 flow. Second operand 11 states and 214 transitions. [2024-06-03 20:48:41,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 139 transitions, 1474 flow [2024-06-03 20:48:41,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 139 transitions, 1421 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:41,293 INFO L231 Difference]: Finished difference. Result has 153 places, 106 transitions, 1074 flow [2024-06-03 20:48:41,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1074, PETRI_PLACES=153, PETRI_TRANSITIONS=106} [2024-06-03 20:48:41,293 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-03 20:48:41,293 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 106 transitions, 1074 flow [2024-06-03 20:48:41,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:41,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:41,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:41,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:48:41,293 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)] === [2024-06-03 20:48:41,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:41,294 INFO L85 PathProgramCache]: Analyzing trace with hash -863621432, now seen corresponding path program 30 times [2024-06-03 20:48:41,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:41,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828319855] [2024-06-03 20:48:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:41,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:41,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:41,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828319855] [2024-06-03 20:48:41,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828319855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:41,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:41,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:41,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183405998] [2024-06-03 20:48:41,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:41,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:41,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:41,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:41,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:41,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:41,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 106 transitions, 1074 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:41,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:41,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:41,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:41,947 INFO L124 PetriNetUnfolderBase]: 1396/2410 cut-off events. [2024-06-03 20:48:41,947 INFO L125 PetriNetUnfolderBase]: For 139216/139220 co-relation queries the response was YES. [2024-06-03 20:48:41,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16621 conditions, 2410 events. 1396/2410 cut-off events. For 139216/139220 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 15133 event pairs, 500 based on Foata normal form. 22/2431 useless extension candidates. Maximal degree in co-relation 16553. Up to 1173 conditions per place. [2024-06-03 20:48:41,964 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 91 selfloop transitions, 27 changer transitions 8/132 dead transitions. [2024-06-03 20:48:41,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 132 transitions, 1661 flow [2024-06-03 20:48:41,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:41,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 20:48:41,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.53125 [2024-06-03 20:48:41,965 INFO L175 Difference]: Start difference. First operand has 153 places, 106 transitions, 1074 flow. Second operand 8 states and 170 transitions. [2024-06-03 20:48:41,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 132 transitions, 1661 flow [2024-06-03 20:48:42,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 132 transitions, 1519 flow, removed 28 selfloop flow, removed 13 redundant places. [2024-06-03 20:48:42,111 INFO L231 Difference]: Finished difference. Result has 139 places, 105 transitions, 1035 flow [2024-06-03 20:48:42,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1035, PETRI_PLACES=139, PETRI_TRANSITIONS=105} [2024-06-03 20:48:42,112 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 98 predicate places. [2024-06-03 20:48:42,112 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 105 transitions, 1035 flow [2024-06-03 20:48:42,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:42,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:42,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:42,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:48:42,112 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)] === [2024-06-03 20:48:42,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash 169987156, now seen corresponding path program 3 times [2024-06-03 20:48:42,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:42,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816741922] [2024-06-03 20:48:42,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:42,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:42,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:42,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:42,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816741922] [2024-06-03 20:48:42,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816741922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:42,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:42,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:42,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691797958] [2024-06-03 20:48:42,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:42,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:42,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:42,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:42,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:42,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:42,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 105 transitions, 1035 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:42,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:42,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:42,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:42,727 INFO L124 PetriNetUnfolderBase]: 1519/2597 cut-off events. [2024-06-03 20:48:42,728 INFO L125 PetriNetUnfolderBase]: For 135777/135777 co-relation queries the response was YES. [2024-06-03 20:48:42,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17493 conditions, 2597 events. 1519/2597 cut-off events. For 135777/135777 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 16468 event pairs, 773 based on Foata normal form. 24/2620 useless extension candidates. Maximal degree in co-relation 17431. Up to 1870 conditions per place. [2024-06-03 20:48:42,746 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 40 changer transitions 16/131 dead transitions. [2024-06-03 20:48:42,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 131 transitions, 1509 flow [2024-06-03 20:48:42,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:42,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:42,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 218 transitions. [2024-06-03 20:48:42,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4954545454545455 [2024-06-03 20:48:42,747 INFO L175 Difference]: Start difference. First operand has 139 places, 105 transitions, 1035 flow. Second operand 11 states and 218 transitions. [2024-06-03 20:48:42,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 131 transitions, 1509 flow [2024-06-03 20:48:42,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 131 transitions, 1457 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:42,941 INFO L231 Difference]: Finished difference. Result has 141 places, 101 transitions, 1019 flow [2024-06-03 20:48:42,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=985, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1019, PETRI_PLACES=141, PETRI_TRANSITIONS=101} [2024-06-03 20:48:42,942 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 100 predicate places. [2024-06-03 20:48:42,942 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 101 transitions, 1019 flow [2024-06-03 20:48:42,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:42,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:42,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:42,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:48:42,942 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)] === [2024-06-03 20:48:42,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:42,943 INFO L85 PathProgramCache]: Analyzing trace with hash -161117016, now seen corresponding path program 4 times [2024-06-03 20:48:42,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:42,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130641722] [2024-06-03 20:48:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:42,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:43,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:43,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:43,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130641722] [2024-06-03 20:48:43,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130641722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:43,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:43,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:43,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199981429] [2024-06-03 20:48:43,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:43,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:43,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:43,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:43,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:43,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:43,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 101 transitions, 1019 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:43,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:43,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:43,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:43,553 INFO L124 PetriNetUnfolderBase]: 1467/2505 cut-off events. [2024-06-03 20:48:43,554 INFO L125 PetriNetUnfolderBase]: For 137591/137599 co-relation queries the response was YES. [2024-06-03 20:48:43,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17050 conditions, 2505 events. 1467/2505 cut-off events. For 137591/137599 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 15876 event pairs, 807 based on Foata normal form. 34/2538 useless extension candidates. Maximal degree in co-relation 16989. Up to 2204 conditions per place. [2024-06-03 20:48:43,571 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 77 selfloop transitions, 19 changer transitions 12/114 dead transitions. [2024-06-03 20:48:43,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 114 transitions, 1299 flow [2024-06-03 20:48:43,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:43,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:43,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 20:48:43,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-06-03 20:48:43,572 INFO L175 Difference]: Start difference. First operand has 141 places, 101 transitions, 1019 flow. Second operand 9 states and 173 transitions. [2024-06-03 20:48:43,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 114 transitions, 1299 flow [2024-06-03 20:48:43,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 114 transitions, 1223 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:43,726 INFO L231 Difference]: Finished difference. Result has 136 places, 97 transitions, 949 flow [2024-06-03 20:48:43,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=943, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=949, PETRI_PLACES=136, PETRI_TRANSITIONS=97} [2024-06-03 20:48:43,727 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 95 predicate places. [2024-06-03 20:48:43,727 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 97 transitions, 949 flow [2024-06-03 20:48:43,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:43,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:43,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:43,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:48:43,727 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)] === [2024-06-03 20:48:43,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:43,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1568318286, now seen corresponding path program 5 times [2024-06-03 20:48:43,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:43,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109420377] [2024-06-03 20:48:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:43,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:43,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:43,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:43,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109420377] [2024-06-03 20:48:43,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109420377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:43,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:43,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:43,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531678752] [2024-06-03 20:48:43,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:43,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:43,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:43,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:43,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:44,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:44,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 97 transitions, 949 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:44,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:44,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:44,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:44,326 INFO L124 PetriNetUnfolderBase]: 1566/2684 cut-off events. [2024-06-03 20:48:44,326 INFO L125 PetriNetUnfolderBase]: For 134574/134574 co-relation queries the response was YES. [2024-06-03 20:48:44,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18126 conditions, 2684 events. 1566/2684 cut-off events. For 134574/134574 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 17269 event pairs, 848 based on Foata normal form. 24/2707 useless extension candidates. Maximal degree in co-relation 18067. Up to 2104 conditions per place. [2024-06-03 20:48:44,345 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 67 selfloop transitions, 34 changer transitions 10/117 dead transitions. [2024-06-03 20:48:44,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 117 transitions, 1355 flow [2024-06-03 20:48:44,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:44,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:44,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-03 20:48:44,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083333333333333 [2024-06-03 20:48:44,346 INFO L175 Difference]: Start difference. First operand has 136 places, 97 transitions, 949 flow. Second operand 9 states and 183 transitions. [2024-06-03 20:48:44,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 117 transitions, 1355 flow [2024-06-03 20:48:44,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 117 transitions, 1309 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:44,489 INFO L231 Difference]: Finished difference. Result has 134 places, 94 transitions, 936 flow [2024-06-03 20:48:44,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=936, PETRI_PLACES=134, PETRI_TRANSITIONS=94} [2024-06-03 20:48:44,489 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 93 predicate places. [2024-06-03 20:48:44,490 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 94 transitions, 936 flow [2024-06-03 20:48:44,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:44,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:44,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:44,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:48:44,490 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)] === [2024-06-03 20:48:44,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:44,491 INFO L85 PathProgramCache]: Analyzing trace with hash -581108208, now seen corresponding path program 6 times [2024-06-03 20:48:44,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:44,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132823259] [2024-06-03 20:48:44,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:44,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:44,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:44,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132823259] [2024-06-03 20:48:44,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132823259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:44,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:44,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:44,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217467165] [2024-06-03 20:48:44,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:44,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:44,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:44,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:44,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:44,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:44,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 94 transitions, 936 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:44,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:44,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:44,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:45,109 INFO L124 PetriNetUnfolderBase]: 1415/2427 cut-off events. [2024-06-03 20:48:45,109 INFO L125 PetriNetUnfolderBase]: For 114999/115003 co-relation queries the response was YES. [2024-06-03 20:48:45,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16015 conditions, 2427 events. 1415/2427 cut-off events. For 114999/115003 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 15253 event pairs, 802 based on Foata normal form. 30/2456 useless extension candidates. Maximal degree in co-relation 15957. Up to 2131 conditions per place. [2024-06-03 20:48:45,127 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 73 selfloop transitions, 14 changer transitions 12/105 dead transitions. [2024-06-03 20:48:45,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 105 transitions, 1194 flow [2024-06-03 20:48:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:45,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-03 20:48:45,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:48:45,128 INFO L175 Difference]: Start difference. First operand has 134 places, 94 transitions, 936 flow. Second operand 7 states and 140 transitions. [2024-06-03 20:48:45,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 105 transitions, 1194 flow [2024-06-03 20:48:45,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 105 transitions, 1125 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:45,305 INFO L231 Difference]: Finished difference. Result has 131 places, 90 transitions, 861 flow [2024-06-03 20:48:45,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=861, PETRI_PLACES=131, PETRI_TRANSITIONS=90} [2024-06-03 20:48:45,306 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 90 predicate places. [2024-06-03 20:48:45,306 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 90 transitions, 861 flow [2024-06-03 20:48:45,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:45,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:45,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:45,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:48:45,306 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)] === [2024-06-03 20:48:45,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:45,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1598483702, now seen corresponding path program 7 times [2024-06-03 20:48:45,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:45,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017204503] [2024-06-03 20:48:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:45,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:45,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:45,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017204503] [2024-06-03 20:48:45,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017204503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:45,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:45,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:45,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123618854] [2024-06-03 20:48:45,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:45,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:45,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:45,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:45,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 90 transitions, 861 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:45,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:45,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:45,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:45,913 INFO L124 PetriNetUnfolderBase]: 1461/2531 cut-off events. [2024-06-03 20:48:45,913 INFO L125 PetriNetUnfolderBase]: For 110522/110522 co-relation queries the response was YES. [2024-06-03 20:48:45,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16612 conditions, 2531 events. 1461/2531 cut-off events. For 110522/110522 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 16127 event pairs, 772 based on Foata normal form. 18/2548 useless extension candidates. Maximal degree in co-relation 16555. Up to 1502 conditions per place. [2024-06-03 20:48:45,930 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 69 selfloop transitions, 34 changer transitions 8/117 dead transitions. [2024-06-03 20:48:45,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 117 transitions, 1355 flow [2024-06-03 20:48:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 216 transitions. [2024-06-03 20:48:45,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-06-03 20:48:45,930 INFO L175 Difference]: Start difference. First operand has 131 places, 90 transitions, 861 flow. Second operand 11 states and 216 transitions. [2024-06-03 20:48:45,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 117 transitions, 1355 flow [2024-06-03 20:48:46,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 117 transitions, 1315 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:46,082 INFO L231 Difference]: Finished difference. Result has 133 places, 88 transitions, 877 flow [2024-06-03 20:48:46,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=829, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=877, PETRI_PLACES=133, PETRI_TRANSITIONS=88} [2024-06-03 20:48:46,083 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-03 20:48:46,083 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 88 transitions, 877 flow [2024-06-03 20:48:46,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:46,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:46,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:46,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:48:46,083 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)] === [2024-06-03 20:48:46,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:46,083 INFO L85 PathProgramCache]: Analyzing trace with hash -858852950, now seen corresponding path program 8 times [2024-06-03 20:48:46,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:46,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474198879] [2024-06-03 20:48:46,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:46,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:46,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:46,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:46,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474198879] [2024-06-03 20:48:46,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474198879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:46,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:46,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:46,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628775757] [2024-06-03 20:48:46,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:46,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:46,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:46,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:46,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:46,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:46,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 88 transitions, 877 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:46,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:46,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:46,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:46,691 INFO L124 PetriNetUnfolderBase]: 1343/2333 cut-off events. [2024-06-03 20:48:46,691 INFO L125 PetriNetUnfolderBase]: For 96151/96155 co-relation queries the response was YES. [2024-06-03 20:48:46,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14965 conditions, 2333 events. 1343/2333 cut-off events. For 96151/96155 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 14684 event pairs, 725 based on Foata normal form. 28/2360 useless extension candidates. Maximal degree in co-relation 14909. Up to 1964 conditions per place. [2024-06-03 20:48:46,706 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 74 selfloop transitions, 12 changer transitions 11/103 dead transitions. [2024-06-03 20:48:46,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 103 transitions, 1163 flow [2024-06-03 20:48:46,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:46,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:46,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-03 20:48:46,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-03 20:48:46,707 INFO L175 Difference]: Start difference. First operand has 133 places, 88 transitions, 877 flow. Second operand 7 states and 142 transitions. [2024-06-03 20:48:46,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 103 transitions, 1163 flow [2024-06-03 20:48:46,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 103 transitions, 1092 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:46,820 INFO L231 Difference]: Finished difference. Result has 128 places, 84 transitions, 783 flow [2024-06-03 20:48:46,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=783, PETRI_PLACES=128, PETRI_TRANSITIONS=84} [2024-06-03 20:48:46,820 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-03 20:48:46,820 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 84 transitions, 783 flow [2024-06-03 20:48:46,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:46,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:46,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:46,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:48:46,820 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)] === [2024-06-03 20:48:46,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1368790442, now seen corresponding path program 9 times [2024-06-03 20:48:46,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:46,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865692192] [2024-06-03 20:48:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:46,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:46,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:47,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:47,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865692192] [2024-06-03 20:48:47,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865692192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:47,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:47,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:47,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643860592] [2024-06-03 20:48:47,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:47,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:47,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:47,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:47,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:47,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 84 transitions, 783 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:47,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:47,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:47,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:47,370 INFO L124 PetriNetUnfolderBase]: 1209/2089 cut-off events. [2024-06-03 20:48:47,371 INFO L125 PetriNetUnfolderBase]: For 81170/81170 co-relation queries the response was YES. [2024-06-03 20:48:47,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13248 conditions, 2089 events. 1209/2089 cut-off events. For 81170/81170 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 12860 event pairs, 662 based on Foata normal form. 18/2106 useless extension candidates. Maximal degree in co-relation 13193. Up to 1825 conditions per place. [2024-06-03 20:48:47,382 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 71 selfloop transitions, 7 changer transitions 15/99 dead transitions. [2024-06-03 20:48:47,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 99 transitions, 1039 flow [2024-06-03 20:48:47,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:47,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 20:48:47,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-03 20:48:47,383 INFO L175 Difference]: Start difference. First operand has 128 places, 84 transitions, 783 flow. Second operand 8 states and 152 transitions. [2024-06-03 20:48:47,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 99 transitions, 1039 flow [2024-06-03 20:48:47,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 99 transitions, 998 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-03 20:48:47,464 INFO L231 Difference]: Finished difference. Result has 126 places, 81 transitions, 720 flow [2024-06-03 20:48:47,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=742, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=720, PETRI_PLACES=126, PETRI_TRANSITIONS=81} [2024-06-03 20:48:47,464 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 85 predicate places. [2024-06-03 20:48:47,464 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 81 transitions, 720 flow [2024-06-03 20:48:47,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:47,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:47,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:47,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:48:47,465 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)] === [2024-06-03 20:48:47,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:47,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1968173646, now seen corresponding path program 10 times [2024-06-03 20:48:47,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:47,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265671488] [2024-06-03 20:48:47,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:47,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:47,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:47,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265671488] [2024-06-03 20:48:47,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265671488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:47,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:47,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:47,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925764510] [2024-06-03 20:48:47,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:47,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:47,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:47,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:47,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:47,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:47,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 81 transitions, 720 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:47,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:47,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:47,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:47,961 INFO L124 PetriNetUnfolderBase]: 1084/1870 cut-off events. [2024-06-03 20:48:47,961 INFO L125 PetriNetUnfolderBase]: For 72429/72433 co-relation queries the response was YES. [2024-06-03 20:48:47,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11563 conditions, 1870 events. 1084/1870 cut-off events. For 72429/72433 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11136 event pairs, 622 based on Foata normal form. 30/1899 useless extension candidates. Maximal degree in co-relation 11509. Up to 1581 conditions per place. [2024-06-03 20:48:47,973 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 51 selfloop transitions, 23 changer transitions 14/94 dead transitions. [2024-06-03 20:48:47,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 94 transitions, 960 flow [2024-06-03 20:48:47,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 20:48:47,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2024-06-03 20:48:47,974 INFO L175 Difference]: Start difference. First operand has 126 places, 81 transitions, 720 flow. Second operand 9 states and 172 transitions. [2024-06-03 20:48:47,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 94 transitions, 960 flow [2024-06-03 20:48:48,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 94 transitions, 930 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:48,051 INFO L231 Difference]: Finished difference. Result has 122 places, 76 transitions, 700 flow [2024-06-03 20:48:48,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=700, PETRI_PLACES=122, PETRI_TRANSITIONS=76} [2024-06-03 20:48:48,052 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-03 20:48:48,052 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 76 transitions, 700 flow [2024-06-03 20:48:48,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:48,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:48,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:48,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:48:48,052 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)] === [2024-06-03 20:48:48,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:48,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1002175292, now seen corresponding path program 11 times [2024-06-03 20:48:48,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:48,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541207205] [2024-06-03 20:48:48,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:48,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:48,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:48,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:48,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:48,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541207205] [2024-06-03 20:48:48,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541207205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:48,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:48,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:48,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950940668] [2024-06-03 20:48:48,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:48,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:48,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:48,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:48,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:48,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:48,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 76 transitions, 700 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:48,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:48,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:48,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:48,573 INFO L124 PetriNetUnfolderBase]: 1076/1872 cut-off events. [2024-06-03 20:48:48,573 INFO L125 PetriNetUnfolderBase]: For 66929/66933 co-relation queries the response was YES. [2024-06-03 20:48:48,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11375 conditions, 1872 events. 1076/1872 cut-off events. For 66929/66933 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11221 event pairs, 633 based on Foata normal form. 30/1901 useless extension candidates. Maximal degree in co-relation 11323. Up to 1575 conditions per place. [2024-06-03 20:48:48,585 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 51 selfloop transitions, 22 changer transitions 12/91 dead transitions. [2024-06-03 20:48:48,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 91 transitions, 938 flow [2024-06-03 20:48:48,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:48,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-03 20:48:48,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-03 20:48:48,586 INFO L175 Difference]: Start difference. First operand has 122 places, 76 transitions, 700 flow. Second operand 11 states and 206 transitions. [2024-06-03 20:48:48,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 91 transitions, 938 flow [2024-06-03 20:48:48,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 91 transitions, 886 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:48,650 INFO L231 Difference]: Finished difference. Result has 119 places, 72 transitions, 664 flow [2024-06-03 20:48:48,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=664, PETRI_PLACES=119, PETRI_TRANSITIONS=72} [2024-06-03 20:48:48,650 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 78 predicate places. [2024-06-03 20:48:48,650 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 72 transitions, 664 flow [2024-06-03 20:48:48,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:48,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:48,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:48,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:48:48,651 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)] === [2024-06-03 20:48:48,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:48,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1562968506, now seen corresponding path program 12 times [2024-06-03 20:48:48,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:48,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122537207] [2024-06-03 20:48:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:48,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:48,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:48,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122537207] [2024-06-03 20:48:48,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122537207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:48,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:48,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:48,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86306296] [2024-06-03 20:48:48,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:48,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:48,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:48,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:48,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:48,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:48,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 72 transitions, 664 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:48,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:48,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:48,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:49,210 INFO L124 PetriNetUnfolderBase]: 1175/2051 cut-off events. [2024-06-03 20:48:49,210 INFO L125 PetriNetUnfolderBase]: For 65870/65870 co-relation queries the response was YES. [2024-06-03 20:48:49,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12411 conditions, 2051 events. 1175/2051 cut-off events. For 65870/65870 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 12634 event pairs, 673 based on Foata normal form. 24/2074 useless extension candidates. Maximal degree in co-relation 12361. Up to 1502 conditions per place. [2024-06-03 20:48:49,222 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 58 selfloop transitions, 20 changer transitions 10/94 dead transitions. [2024-06-03 20:48:49,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 94 transitions, 1014 flow [2024-06-03 20:48:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-03 20:48:49,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-03 20:48:49,223 INFO L175 Difference]: Start difference. First operand has 119 places, 72 transitions, 664 flow. Second operand 11 states and 210 transitions. [2024-06-03 20:48:49,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 94 transitions, 1014 flow [2024-06-03 20:48:49,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 94 transitions, 962 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:49,280 INFO L231 Difference]: Finished difference. Result has 117 places, 69 transitions, 621 flow [2024-06-03 20:48:49,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=621, PETRI_PLACES=117, PETRI_TRANSITIONS=69} [2024-06-03 20:48:49,281 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 76 predicate places. [2024-06-03 20:48:49,281 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 69 transitions, 621 flow [2024-06-03 20:48:49,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:49,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:49,281 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, 1] [2024-06-03 20:48:49,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:48:49,281 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)] === [2024-06-03 20:48:49,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:49,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1563326556, now seen corresponding path program 13 times [2024-06-03 20:48:49,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:49,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373016477] [2024-06-03 20:48:49,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:49,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:49,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:49,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373016477] [2024-06-03 20:48:49,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373016477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:49,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:49,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:49,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771134748] [2024-06-03 20:48:49,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:49,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:49,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:49,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:49,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:49,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:49,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 69 transitions, 621 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:49,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:49,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:49,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:49,767 INFO L124 PetriNetUnfolderBase]: 1024/1794 cut-off events. [2024-06-03 20:48:49,768 INFO L125 PetriNetUnfolderBase]: For 53755/53759 co-relation queries the response was YES. [2024-06-03 20:48:49,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10516 conditions, 1794 events. 1024/1794 cut-off events. For 53755/53759 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 10664 event pairs, 628 based on Foata normal form. 30/1823 useless extension candidates. Maximal degree in co-relation 10467. Up to 1502 conditions per place. [2024-06-03 20:48:49,778 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 48 selfloop transitions, 15 changer transitions 15/84 dead transitions. [2024-06-03 20:48:49,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 84 transitions, 845 flow [2024-06-03 20:48:49,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:48:49,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:48:49,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-03 20:48:49,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-03 20:48:49,779 INFO L175 Difference]: Start difference. First operand has 117 places, 69 transitions, 621 flow. Second operand 11 states and 202 transitions. [2024-06-03 20:48:49,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 84 transitions, 845 flow [2024-06-03 20:48:49,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 84 transitions, 804 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 20:48:49,824 INFO L231 Difference]: Finished difference. Result has 116 places, 63 transitions, 565 flow [2024-06-03 20:48:49,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=565, PETRI_PLACES=116, PETRI_TRANSITIONS=63} [2024-06-03 20:48:49,824 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-03 20:48:49,824 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 63 transitions, 565 flow [2024-06-03 20:48:49,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:49,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:49,825 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, 1] [2024-06-03 20:48:49,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:48:49,825 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)] === [2024-06-03 20:48:49,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:49,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1362308342, now seen corresponding path program 14 times [2024-06-03 20:48:49,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:49,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802801148] [2024-06-03 20:48:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:49,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:49,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:50,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:50,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802801148] [2024-06-03 20:48:50,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802801148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:50,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:50,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:50,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992269695] [2024-06-03 20:48:50,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:50,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:50,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:50,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:50,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:50,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:50,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 63 transitions, 565 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:50,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:50,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:50,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:50,322 INFO L124 PetriNetUnfolderBase]: 893/1577 cut-off events. [2024-06-03 20:48:50,322 INFO L125 PetriNetUnfolderBase]: For 41413/41417 co-relation queries the response was YES. [2024-06-03 20:48:50,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8873 conditions, 1577 events. 893/1577 cut-off events. For 41413/41417 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 9142 event pairs, 504 based on Foata normal form. 28/1604 useless extension candidates. Maximal degree in co-relation 8825. Up to 1268 conditions per place. [2024-06-03 20:48:50,331 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 45 selfloop transitions, 11 changer transitions 19/81 dead transitions. [2024-06-03 20:48:50,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 81 transitions, 813 flow [2024-06-03 20:48:50,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:50,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-03 20:48:50,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675 [2024-06-03 20:48:50,332 INFO L175 Difference]: Start difference. First operand has 116 places, 63 transitions, 565 flow. Second operand 10 states and 187 transitions. [2024-06-03 20:48:50,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 81 transitions, 813 flow [2024-06-03 20:48:50,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 81 transitions, 775 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-03 20:48:50,367 INFO L231 Difference]: Finished difference. Result has 108 places, 58 transitions, 500 flow [2024-06-03 20:48:50,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=527, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=500, PETRI_PLACES=108, PETRI_TRANSITIONS=58} [2024-06-03 20:48:50,367 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 67 predicate places. [2024-06-03 20:48:50,367 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 58 transitions, 500 flow [2024-06-03 20:48:50,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:50,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:50,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:50,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:48:50,368 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)] === [2024-06-03 20:48:50,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash -645563146, now seen corresponding path program 15 times [2024-06-03 20:48:50,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:50,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378376389] [2024-06-03 20:48:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:50,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:50,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:50,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:50,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378376389] [2024-06-03 20:48:50,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378376389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:50,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:50,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:50,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86521687] [2024-06-03 20:48:50,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:50,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:50,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:50,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:50,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:50,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:50,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 58 transitions, 500 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:50,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:50,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:50,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:50,910 INFO L124 PetriNetUnfolderBase]: 1001/1771 cut-off events. [2024-06-03 20:48:50,910 INFO L125 PetriNetUnfolderBase]: For 40735/40739 co-relation queries the response was YES. [2024-06-03 20:48:50,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9926 conditions, 1771 events. 1001/1771 cut-off events. For 40735/40739 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 10720 event pairs, 408 based on Foata normal form. 22/1792 useless extension candidates. Maximal degree in co-relation 9881. Up to 836 conditions per place. [2024-06-03 20:48:50,920 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 59 selfloop transitions, 15 changer transitions 8/88 dead transitions. [2024-06-03 20:48:50,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 88 transitions, 926 flow [2024-06-03 20:48:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:48:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:48:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-03 20:48:50,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.495 [2024-06-03 20:48:50,920 INFO L175 Difference]: Start difference. First operand has 108 places, 58 transitions, 500 flow. Second operand 10 states and 198 transitions. [2024-06-03 20:48:50,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 88 transitions, 926 flow [2024-06-03 20:48:50,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 88 transitions, 863 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-03 20:48:50,957 INFO L231 Difference]: Finished difference. Result has 101 places, 56 transitions, 472 flow [2024-06-03 20:48:50,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=472, PETRI_PLACES=101, PETRI_TRANSITIONS=56} [2024-06-03 20:48:50,957 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-03 20:48:50,957 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 56 transitions, 472 flow [2024-06-03 20:48:50,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:50,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:50,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:50,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:48:50,958 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)] === [2024-06-03 20:48:50,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:50,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1554508716, now seen corresponding path program 16 times [2024-06-03 20:48:50,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:50,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181470207] [2024-06-03 20:48:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:50,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:51,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:51,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181470207] [2024-06-03 20:48:51,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181470207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:51,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:51,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:51,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454884628] [2024-06-03 20:48:51,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:51,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:51,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:51,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:51,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:51,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:51,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 56 transitions, 472 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:51,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:51,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:51,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:51,426 INFO L124 PetriNetUnfolderBase]: 883/1569 cut-off events. [2024-06-03 20:48:51,426 INFO L125 PetriNetUnfolderBase]: For 30211/30215 co-relation queries the response was YES. [2024-06-03 20:48:51,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8192 conditions, 1569 events. 883/1569 cut-off events. For 30211/30215 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 9174 event pairs, 541 based on Foata normal form. 28/1596 useless extension candidates. Maximal degree in co-relation 8149. Up to 1224 conditions per place. [2024-06-03 20:48:51,433 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 40 selfloop transitions, 7 changer transitions 23/76 dead transitions. [2024-06-03 20:48:51,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 76 transitions, 730 flow [2024-06-03 20:48:51,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:51,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:51,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 20:48:51,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:48:51,434 INFO L175 Difference]: Start difference. First operand has 101 places, 56 transitions, 472 flow. Second operand 8 states and 160 transitions. [2024-06-03 20:48:51,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 76 transitions, 730 flow [2024-06-03 20:48:51,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 76 transitions, 697 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:48:51,455 INFO L231 Difference]: Finished difference. Result has 98 places, 51 transitions, 394 flow [2024-06-03 20:48:51,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=98, PETRI_TRANSITIONS=51} [2024-06-03 20:48:51,455 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 57 predicate places. [2024-06-03 20:48:51,455 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 51 transitions, 394 flow [2024-06-03 20:48:51,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:51,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:51,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:51,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:48:51,455 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)] === [2024-06-03 20:48:51,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash -645567796, now seen corresponding path program 17 times [2024-06-03 20:48:51,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:51,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717799316] [2024-06-03 20:48:51,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:51,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:51,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:51,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:51,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717799316] [2024-06-03 20:48:51,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717799316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:51,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:51,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:51,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052627054] [2024-06-03 20:48:51,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:51,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:51,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:51,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:51,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:51,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:51,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 51 transitions, 394 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:51,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:51,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:51,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:51,930 INFO L124 PetriNetUnfolderBase]: 721/1293 cut-off events. [2024-06-03 20:48:51,930 INFO L125 PetriNetUnfolderBase]: For 22507/22507 co-relation queries the response was YES. [2024-06-03 20:48:51,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6567 conditions, 1293 events. 721/1293 cut-off events. For 22507/22507 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7261 event pairs, 414 based on Foata normal form. 18/1310 useless extension candidates. Maximal degree in co-relation 6525. Up to 1048 conditions per place. [2024-06-03 20:48:51,935 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 41 selfloop transitions, 5 changer transitions 15/67 dead transitions. [2024-06-03 20:48:51,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 67 transitions, 584 flow [2024-06-03 20:48:51,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:51,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:48:51,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-03 20:48:51,936 INFO L175 Difference]: Start difference. First operand has 98 places, 51 transitions, 394 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:48:51,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 67 transitions, 584 flow [2024-06-03 20:48:51,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 67 transitions, 549 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:48:51,966 INFO L231 Difference]: Finished difference. Result has 91 places, 48 transitions, 348 flow [2024-06-03 20:48:51,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=348, PETRI_PLACES=91, PETRI_TRANSITIONS=48} [2024-06-03 20:48:51,966 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 50 predicate places. [2024-06-03 20:48:51,966 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 48 transitions, 348 flow [2024-06-03 20:48:51,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:51,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:51,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:51,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:48:51,966 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)] === [2024-06-03 20:48:51,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:51,967 INFO L85 PathProgramCache]: Analyzing trace with hash -580277318, now seen corresponding path program 31 times [2024-06-03 20:48:51,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:51,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537047615] [2024-06-03 20:48:51,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:51,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:51,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:52,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:52,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537047615] [2024-06-03 20:48:52,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537047615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:52,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:52,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:52,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486088122] [2024-06-03 20:48:52,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:52,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:52,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:52,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:52,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:52,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:52,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 48 transitions, 348 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:52,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:52,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:52,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:52,431 INFO L124 PetriNetUnfolderBase]: 612/1102 cut-off events. [2024-06-03 20:48:52,431 INFO L125 PetriNetUnfolderBase]: For 14323/14323 co-relation queries the response was YES. [2024-06-03 20:48:52,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5257 conditions, 1102 events. 612/1102 cut-off events. For 14323/14323 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6014 event pairs, 272 based on Foata normal form. 18/1119 useless extension candidates. Maximal degree in co-relation 5219. Up to 607 conditions per place. [2024-06-03 20:48:52,436 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 41 selfloop transitions, 8 changer transitions 13/68 dead transitions. [2024-06-03 20:48:52,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 68 transitions, 612 flow [2024-06-03 20:48:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:52,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-03 20:48:52,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-06-03 20:48:52,437 INFO L175 Difference]: Start difference. First operand has 91 places, 48 transitions, 348 flow. Second operand 7 states and 145 transitions. [2024-06-03 20:48:52,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 68 transitions, 612 flow [2024-06-03 20:48:52,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 68 transitions, 588 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 20:48:52,446 INFO L231 Difference]: Finished difference. Result has 84 places, 45 transitions, 314 flow [2024-06-03 20:48:52,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=314, PETRI_PLACES=84, PETRI_TRANSITIONS=45} [2024-06-03 20:48:52,446 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 43 predicate places. [2024-06-03 20:48:52,446 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 45 transitions, 314 flow [2024-06-03 20:48:52,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:52,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:52,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:52,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:48:52,447 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)] === [2024-06-03 20:48:52,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:52,447 INFO L85 PathProgramCache]: Analyzing trace with hash -869195852, now seen corresponding path program 32 times [2024-06-03 20:48:52,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:52,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925170064] [2024-06-03 20:48:52,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:52,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:52,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:52,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:52,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:52,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925170064] [2024-06-03 20:48:52,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925170064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:52,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:52,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:52,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267552925] [2024-06-03 20:48:52,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:52,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:52,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:52,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:52,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:52,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:52,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 45 transitions, 314 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:52,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:52,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:52,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:52,935 INFO L124 PetriNetUnfolderBase]: 492/900 cut-off events. [2024-06-03 20:48:52,936 INFO L125 PetriNetUnfolderBase]: For 10407/10407 co-relation queries the response was YES. [2024-06-03 20:48:52,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4051 conditions, 900 events. 492/900 cut-off events. For 10407/10407 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4652 event pairs, 284 based on Foata normal form. 24/923 useless extension candidates. Maximal degree in co-relation 4015. Up to 637 conditions per place. [2024-06-03 20:48:52,939 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 32 selfloop transitions, 4 changer transitions 18/60 dead transitions. [2024-06-03 20:48:52,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 60 transitions, 510 flow [2024-06-03 20:48:52,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:48:52,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:48:52,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 20:48:52,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2024-06-03 20:48:52,939 INFO L175 Difference]: Start difference. First operand has 84 places, 45 transitions, 314 flow. Second operand 7 states and 138 transitions. [2024-06-03 20:48:52,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 60 transitions, 510 flow [2024-06-03 20:48:52,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 60 transitions, 466 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 20:48:52,946 INFO L231 Difference]: Finished difference. Result has 79 places, 40 transitions, 240 flow [2024-06-03 20:48:52,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=240, PETRI_PLACES=79, PETRI_TRANSITIONS=40} [2024-06-03 20:48:52,946 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 38 predicate places. [2024-06-03 20:48:52,946 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 40 transitions, 240 flow [2024-06-03 20:48:52,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:52,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:52,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:52,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:48:52,947 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)] === [2024-06-03 20:48:52,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:52,947 INFO L85 PathProgramCache]: Analyzing trace with hash -468431626, now seen corresponding path program 18 times [2024-06-03 20:48:52,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:52,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269965893] [2024-06-03 20:48:52,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:52,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:53,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:53,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269965893] [2024-06-03 20:48:53,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269965893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:53,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:53,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:53,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737109655] [2024-06-03 20:48:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:53,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:53,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:53,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:53,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:53,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:53,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 40 transitions, 240 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:53,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:53,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:53,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:53,361 INFO L124 PetriNetUnfolderBase]: 357/653 cut-off events. [2024-06-03 20:48:53,361 INFO L125 PetriNetUnfolderBase]: For 7327/7327 co-relation queries the response was YES. [2024-06-03 20:48:53,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2778 conditions, 653 events. 357/653 cut-off events. For 7327/7327 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3042 event pairs, 185 based on Foata normal form. 18/670 useless extension candidates. Maximal degree in co-relation 2743. Up to 425 conditions per place. [2024-06-03 20:48:53,363 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 27 selfloop transitions, 3 changer transitions 22/58 dead transitions. [2024-06-03 20:48:53,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 58 transitions, 416 flow [2024-06-03 20:48:53,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:48:53,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:48:53,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 20:48:53,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-03 20:48:53,364 INFO L175 Difference]: Start difference. First operand has 79 places, 40 transitions, 240 flow. Second operand 9 states and 165 transitions. [2024-06-03 20:48:53,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 58 transitions, 416 flow [2024-06-03 20:48:53,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 402 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:48:53,368 INFO L231 Difference]: Finished difference. Result has 75 places, 34 transitions, 184 flow [2024-06-03 20:48:53,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=184, PETRI_PLACES=75, PETRI_TRANSITIONS=34} [2024-06-03 20:48:53,368 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 34 predicate places. [2024-06-03 20:48:53,368 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 34 transitions, 184 flow [2024-06-03 20:48:53,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:53,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:53,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:53,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:48:53,369 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)] === [2024-06-03 20:48:53,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:53,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1848765520, now seen corresponding path program 33 times [2024-06-03 20:48:53,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:53,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107032938] [2024-06-03 20:48:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:53,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:53,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:53,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:53,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107032938] [2024-06-03 20:48:53,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107032938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:53,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:53,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:53,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955679465] [2024-06-03 20:48:53,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:53,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:53,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:53,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:53,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:53,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:53,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 34 transitions, 184 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:53,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:53,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:53,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:53,821 INFO L124 PetriNetUnfolderBase]: 310/574 cut-off events. [2024-06-03 20:48:53,821 INFO L125 PetriNetUnfolderBase]: For 5570/5570 co-relation queries the response was YES. [2024-06-03 20:48:53,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2402 conditions, 574 events. 310/574 cut-off events. For 5570/5570 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2719 event pairs, 69 based on Foata normal form. 18/591 useless extension candidates. Maximal degree in co-relation 2369. Up to 204 conditions per place. [2024-06-03 20:48:53,823 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 35 selfloop transitions, 6 changer transitions 8/55 dead transitions. [2024-06-03 20:48:53,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 55 transitions, 406 flow [2024-06-03 20:48:53,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:53,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:53,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 20:48:53,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478125 [2024-06-03 20:48:53,824 INFO L175 Difference]: Start difference. First operand has 75 places, 34 transitions, 184 flow. Second operand 8 states and 153 transitions. [2024-06-03 20:48:53,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 55 transitions, 406 flow [2024-06-03 20:48:53,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 55 transitions, 358 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-03 20:48:53,827 INFO L231 Difference]: Finished difference. Result has 63 places, 32 transitions, 159 flow [2024-06-03 20:48:53,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=159, PETRI_PLACES=63, PETRI_TRANSITIONS=32} [2024-06-03 20:48:53,827 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-06-03 20:48:53,827 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 32 transitions, 159 flow [2024-06-03 20:48:53,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:53,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:53,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:53,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:48:53,827 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)] === [2024-06-03 20:48:53,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:53,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1848775750, now seen corresponding path program 34 times [2024-06-03 20:48:53,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:53,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258517111] [2024-06-03 20:48:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:53,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:54,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:54,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:54,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258517111] [2024-06-03 20:48:54,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258517111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:54,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:54,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:54,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052359148] [2024-06-03 20:48:54,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:54,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:54,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:54,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:54,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:54,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:54,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 32 transitions, 159 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:54,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:54,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:54,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:54,267 INFO L124 PetriNetUnfolderBase]: 205/387 cut-off events. [2024-06-03 20:48:54,267 INFO L125 PetriNetUnfolderBase]: For 2143/2167 co-relation queries the response was YES. [2024-06-03 20:48:54,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 387 events. 205/387 cut-off events. For 2143/2167 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1598 event pairs, 57 based on Foata normal form. 18/404 useless extension candidates. Maximal degree in co-relation 1387. Up to 204 conditions per place. [2024-06-03 20:48:54,268 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 23 selfloop transitions, 4 changer transitions 15/48 dead transitions. [2024-06-03 20:48:54,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 48 transitions, 303 flow [2024-06-03 20:48:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:54,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 20:48:54,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.459375 [2024-06-03 20:48:54,269 INFO L175 Difference]: Start difference. First operand has 63 places, 32 transitions, 159 flow. Second operand 8 states and 147 transitions. [2024-06-03 20:48:54,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 48 transitions, 303 flow [2024-06-03 20:48:54,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 48 transitions, 288 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:48:54,270 INFO L231 Difference]: Finished difference. Result has 62 places, 29 transitions, 135 flow [2024-06-03 20:48:54,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=135, PETRI_PLACES=62, PETRI_TRANSITIONS=29} [2024-06-03 20:48:54,271 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-03 20:48:54,271 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 29 transitions, 135 flow [2024-06-03 20:48:54,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:54,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:48:54,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:54,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:48:54,271 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)] === [2024-06-03 20:48:54,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:48:54,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1842052622, now seen corresponding path program 35 times [2024-06-03 20:48:54,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:48:54,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850487167] [2024-06-03 20:48:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:48:54,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:48:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:48:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:48:54,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:48:54,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850487167] [2024-06-03 20:48:54,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850487167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:48:54,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:48:54,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:48:54,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112985635] [2024-06-03 20:48:54,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:48:54,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:48:54,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:48:54,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:48:54,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:48:54,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 40 [2024-06-03 20:48:54,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 29 transitions, 135 flow. Second operand has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:54,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:48:54,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 40 [2024-06-03 20:48:54,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:48:54,670 INFO L124 PetriNetUnfolderBase]: 96/196 cut-off events. [2024-06-03 20:48:54,670 INFO L125 PetriNetUnfolderBase]: For 863/863 co-relation queries the response was YES. [2024-06-03 20:48:54,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 616 conditions, 196 events. 96/196 cut-off events. For 863/863 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 591 event pairs, 1 based on Foata normal form. 18/213 useless extension candidates. Maximal degree in co-relation 600. Up to 96 conditions per place. [2024-06-03 20:48:54,671 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 0 selfloop transitions, 0 changer transitions 40/40 dead transitions. [2024-06-03 20:48:54,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 40 transitions, 225 flow [2024-06-03 20:48:54,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:48:54,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:48:54,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 20:48:54,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.434375 [2024-06-03 20:48:54,672 INFO L175 Difference]: Start difference. First operand has 62 places, 29 transitions, 135 flow. Second operand 8 states and 139 transitions. [2024-06-03 20:48:54,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 40 transitions, 225 flow [2024-06-03 20:48:54,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 40 transitions, 191 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-03 20:48:54,672 INFO L231 Difference]: Finished difference. Result has 50 places, 0 transitions, 0 flow [2024-06-03 20:48:54,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=87, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=50, PETRI_TRANSITIONS=0} [2024-06-03 20:48:54,673 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2024-06-03 20:48:54,673 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 0 transitions, 0 flow [2024-06-03 20:48:54,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.636363636363637) internal successors, (161), 11 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:48:54,675 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (5 of 6 remaining) [2024-06-03 20:48:54,676 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (4 of 6 remaining) [2024-06-03 20:48:54,676 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 6 remaining) [2024-06-03 20:48:54,676 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 6 remaining) [2024-06-03 20:48:54,676 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 6 remaining) [2024-06-03 20:48:54,676 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 6 remaining) [2024-06-03 20:48:54,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:48:54,677 INFO L445 BasicCegarLoop]: Path program histogram: [35, 21, 18, 13, 9, 8, 8, 6, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:48:54,679 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-03 20:48:54,679 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-03 20:48:54,682 INFO L507 ceAbstractionStarter]: Automizer considered 3 witness invariants [2024-06-03 20:48:54,682 INFO L508 ceAbstractionStarter]: WitnessConsidered=3 [2024-06-03 20:48:54,682 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.06 08:48:54 BasicIcfg [2024-06-03 20:48:54,682 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-03 20:48:54,683 INFO L158 Benchmark]: Toolchain (without parser) took 146280.97ms. Allocated memory was 188.7MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 113.0MB in the beginning and 2.0GB in the end (delta: -1.9GB). Peak memory consumption was 60.4MB. Max. memory is 16.1GB. [2024-06-03 20:48:54,683 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 117.4MB. Free memory was 78.3MB in the beginning and 78.2MB in the end (delta: 86.3kB). There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 20:48:54,683 INFO L158 Benchmark]: Witness Parser took 0.14ms. Allocated memory is still 188.7MB. Free memory is still 118.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-03 20:48:54,683 INFO L158 Benchmark]: CACSL2BoogieTranslator took 490.05ms. Allocated memory is still 188.7MB. Free memory was 112.9MB in the beginning and 82.8MB in the end (delta: 30.0MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-06-03 20:48:54,683 INFO L158 Benchmark]: Boogie Procedure Inliner took 52.87ms. Allocated memory is still 188.7MB. Free memory was 82.8MB in the beginning and 79.8MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-03 20:48:54,684 INFO L158 Benchmark]: Boogie Preprocessor took 67.32ms. Allocated memory is still 188.7MB. Free memory was 79.8MB in the beginning and 157.0MB in the end (delta: -77.2MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. [2024-06-03 20:48:54,684 INFO L158 Benchmark]: RCFGBuilder took 491.68ms. Allocated memory is still 188.7MB. Free memory was 156.3MB in the beginning and 117.9MB in the end (delta: 38.5MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. [2024-06-03 20:48:54,684 INFO L158 Benchmark]: TraceAbstraction took 145172.67ms. Allocated memory was 188.7MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 117.2MB in the beginning and 2.0GB in the end (delta: -1.9GB). Peak memory consumption was 62.8MB. Max. memory is 16.1GB. [2024-06-03 20:48:54,685 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 117.4MB. Free memory was 78.3MB in the beginning and 78.2MB in the end (delta: 86.3kB). There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.14ms. Allocated memory is still 188.7MB. Free memory is still 118.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 490.05ms. Allocated memory is still 188.7MB. Free memory was 112.9MB in the beginning and 82.8MB in the end (delta: 30.0MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 52.87ms. Allocated memory is still 188.7MB. Free memory was 82.8MB in the beginning and 79.8MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 67.32ms. Allocated memory is still 188.7MB. Free memory was 79.8MB in the beginning and 157.0MB in the end (delta: -77.2MB). Peak memory consumption was 10.2MB. Max. memory is 16.1GB. * RCFGBuilder took 491.68ms. Allocated memory is still 188.7MB. Free memory was 156.3MB in the beginning and 117.9MB in the end (delta: 38.5MB). Peak memory consumption was 37.7MB. Max. memory is 16.1GB. * TraceAbstraction took 145172.67ms. Allocated memory was 188.7MB in the beginning and 2.1GB in the end (delta: 1.9GB). Free memory was 117.2MB in the beginning and 2.0GB in the end (delta: -1.9GB). Peak memory consumption was 62.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 778]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 780]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 781]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 64 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 145.1s, OverallIterations: 156, TraceHistogramMax: 1, PathProgramHistogramMax: 35, EmptinessCheckTime: 0.0s, AutomataDifference: 107.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 12382 SdHoareTripleChecker+Valid, 20.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10421 mSDsluCounter, 2375 SdHoareTripleChecker+Invalid, 16.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1562 mSDsCounter, 1898 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 48181 IncrementalHoareTripleChecker+Invalid, 50079 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1898 mSolverCounterUnsat, 813 mSDtfsCounter, 48181 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1484 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 1385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 8.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3661occurred in iteration=80, InterpolantAutomatonStates: 1273, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 35.5s InterpolantComputationTime, 3161 NumberOfCodeBlocks, 3161 NumberOfCodeBlocksAsserted, 156 NumberOfCheckSat, 3005 ConstructedInterpolants, 0 QuantifiedInterpolants, 36502 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 156 InterpolantComputations, 156 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-03 20:48:54,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE