./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe002_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_rmo.oepc.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-7724a2d-m [2024-06-28 03:52:26,927 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-28 03:52:26,986 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-28 03:52:26,989 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-28 03:52:26,989 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-28 03:52:27,014 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-28 03:52:27,014 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-28 03:52:27,015 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-28 03:52:27,015 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-28 03:52:27,015 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-28 03:52:27,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-28 03:52:27,016 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-28 03:52:27,016 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-28 03:52:27,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-28 03:52:27,016 INFO L153 SettingsManager]: * Use SBE=true [2024-06-28 03:52:27,017 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-28 03:52:27,017 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-28 03:52:27,017 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-28 03:52:27,017 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-28 03:52:27,018 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-28 03:52:27,018 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-28 03:52:27,021 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-28 03:52:27,021 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-28 03:52:27,021 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-28 03:52:27,024 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-28 03:52:27,024 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-28 03:52:27,024 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-28 03:52:27,024 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-28 03:52:27,025 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-28 03:52:27,025 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-28 03:52:27,025 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-28 03:52:27,025 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-28 03:52:27,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:52:27,026 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-28 03:52:27,026 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-28 03:52:27,026 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-28 03:52:27,026 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-28 03:52:27,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-28 03:52:27,026 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-28 03:52:27,026 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-28 03:52:27,026 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-28 03:52:27,027 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-28 03:52:27,027 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-28 03:52:27,027 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-28 03:52:27,215 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-28 03:52:27,231 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-28 03:52:27,233 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-28 03:52:27,235 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-28 03:52:27,235 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-28 03:52:27,236 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe002_rmo.oepc.yml/witness.yml [2024-06-28 03:52:27,428 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-28 03:52:27,429 INFO L274 PluginConnector]: CDTParser initialized [2024-06-28 03:52:27,429 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i [2024-06-28 03:52:28,388 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-28 03:52:28,604 INFO L384 CDTParser]: Found 1 translation units. [2024-06-28 03:52:28,604 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe002_rmo.oepc.i [2024-06-28 03:52:28,631 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb6a2993/65bea65f746d4f4f821f98bd330bdee9/FLAG2ebb0cea5 [2024-06-28 03:52:28,640 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3fb6a2993/65bea65f746d4f4f821f98bd330bdee9 [2024-06-28 03:52:28,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-28 03:52:28,641 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-28 03:52:28,644 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-28 03:52:28,644 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-28 03:52:28,647 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-28 03:52:28,648 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:52:27" (1/2) ... [2024-06-28 03:52:28,649 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15a01719 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:52:28, skipping insertion in model container [2024-06-28 03:52:28,649 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:52:27" (1/2) ... [2024-06-28 03:52:28,650 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3ad9f580 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 28.06 03:52:28, skipping insertion in model container [2024-06-28 03:52:28,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:52:28" (2/2) ... [2024-06-28 03:52:28,650 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15a01719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:28, skipping insertion in model container [2024-06-28 03:52:28,650 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.06 03:52:28" (2/2) ... [2024-06-28 03:52:28,651 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-28 03:52:28,834 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-28 03:52:28,836 INFO L97 edCorrectnessWitness]: Location invariant before [L855-L855] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 03:52:28,836 INFO L97 edCorrectnessWitness]: Location invariant before [L857-L857] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 03:52:28,836 INFO L97 edCorrectnessWitness]: Location invariant before [L858-L858] ((((((((((((((((((((((((((((((((((((! multithreaded || __unbuffered_p0_EAX$w_buff0 == 0) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$w_buff1_used == (_Bool)0)) && (! multithreaded || y$w_buff1 == 0)) && (! multithreaded || y$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((((((((((((((((((((((((((((((((((((0 <= __unbuffered_cnt && __unbuffered_p0_EAX$flush_delayed == (_Bool)0) && __unbuffered_p0_EAX$mem_tmp == 0) && __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff0_thd3 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd0 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0) && __unbuffered_p0_EAX$r_buff1_thd3 == (_Bool)0) && __unbuffered_p0_EAX$w_buff0 == 0) && __unbuffered_p0_EAX$w_buff0_used == (_Bool)0) && __unbuffered_p0_EAX$w_buff1 == 0) && __unbuffered_p0_EAX$w_buff1_used == (_Bool)0) && y$flush_delayed == (_Bool)0) && y$r_buff0_thd0 == (_Bool)0) && y$r_buff0_thd1 == (_Bool)0) && y$r_buff0_thd2 == (_Bool)0) && y$r_buff0_thd3 == (_Bool)0) && y$r_buff1_thd0 == (_Bool)0) && y$r_buff1_thd1 == (_Bool)0) && y$r_buff1_thd2 == (_Bool)0) && y$r_buff1_thd3 == (_Bool)0) && y$read_delayed == (_Bool)0) && y$read_delayed_var == 0) && y$w_buff0 == 0) && y$w_buff0_used == (_Bool)0) && y$w_buff1 == 0) && y$w_buff1_used == (_Bool)0) && (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2)))) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((y == 0 || y == 1) || y == 2)) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || __unbuffered_p0_EAX$w_buff0_used == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EAX$read_delayed_var == 0 || (__unbuffered_p0_EAX$read_delayed_var == & y && ((*__unbuffered_p0_EAX$read_delayed_var == 0 || *__unbuffered_p0_EAX$read_delayed_var == 1) || *__unbuffered_p0_EAX$read_delayed_var == 2))))) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1 == 0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || __unbuffered_p0_EAX$w_buff1_used == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$flush_delayed == (_Bool)0)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || __unbuffered_p0_EAX$mem_tmp == 0)) && (! multithreaded || y$w_buff0 == 0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || __unbuffered_p0_EAX$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0) [2024-06-28 03:52:28,836 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-28 03:52:28,836 INFO L106 edCorrectnessWitness]: ghost_update [L853-L853] multithreaded = 1; [2024-06-28 03:52:28,872 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-28 03:52:29,171 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:52:29,183 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-28 03:52:29,331 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-28 03:52:29,367 INFO L206 MainTranslator]: Completed translation [2024-06-28 03:52:29,368 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29 WrapperNode [2024-06-28 03:52:29,368 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-28 03:52:29,369 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-28 03:52:29,369 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-28 03:52:29,369 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-28 03:52:29,375 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29" (1/1) ... [2024-06-28 03:52:29,407 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29" (1/1) ... [2024-06-28 03:52:29,446 INFO L138 Inliner]: procedures = 175, calls = 107, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 279 [2024-06-28 03:52:29,449 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-28 03:52:29,450 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-28 03:52:29,450 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-28 03:52:29,450 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-28 03:52:29,460 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29" (1/1) ... [2024-06-28 03:52:29,461 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29" (1/1) ... [2024-06-28 03:52:29,475 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29" (1/1) ... [2024-06-28 03:52:29,505 INFO L175 MemorySlicer]: Split 66 memory accesses to 2 slices as follows [2, 64]. 97 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 1]. The 11 writes are split as follows [0, 11]. [2024-06-28 03:52:29,506 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29" (1/1) ... [2024-06-28 03:52:29,506 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29" (1/1) ... [2024-06-28 03:52:29,519 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29" (1/1) ... [2024-06-28 03:52:29,529 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29" (1/1) ... [2024-06-28 03:52:29,541 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29" (1/1) ... [2024-06-28 03:52:29,543 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29" (1/1) ... [2024-06-28 03:52:29,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-28 03:52:29,557 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-28 03:52:29,557 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-28 03:52:29,557 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-28 03:52:29,558 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29" (1/1) ... [2024-06-28 03:52:29,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-28 03:52:29,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-28 03:52:29,598 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) [2024-06-28 03:52:29,609 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 [2024-06-28 03:52:29,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-28 03:52:29,633 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-28 03:52:29,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-28 03:52:29,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-28 03:52:29,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-28 03:52:29,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-28 03:52:29,634 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-28 03:52:29,634 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-28 03:52:29,635 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-28 03:52:29,635 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-28 03:52:29,635 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-28 03:52:29,635 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-28 03:52:29,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-28 03:52:29,635 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-28 03:52:29,640 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-28 03:52:29,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-28 03:52:29,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-28 03:52:29,644 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-28 03:52:29,756 INFO L244 CfgBuilder]: Building ICFG [2024-06-28 03:52:29,758 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-28 03:52:30,257 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-28 03:52:30,258 INFO L293 CfgBuilder]: Performing block encoding [2024-06-28 03:52:30,669 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-28 03:52:30,670 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-28 03:52:30,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:52:30 BoogieIcfgContainer [2024-06-28 03:52:30,670 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-28 03:52:30,672 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-28 03:52:30,673 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-28 03:52:30,675 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-28 03:52:30,675 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 28.06 03:52:27" (1/4) ... [2024-06-28 03:52:30,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cbee94f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 28.06 03:52:30, skipping insertion in model container [2024-06-28 03:52:30,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.06 03:52:28" (2/4) ... [2024-06-28 03:52:30,676 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cbee94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:52:30, skipping insertion in model container [2024-06-28 03:52:30,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.06 03:52:29" (3/4) ... [2024-06-28 03:52:30,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cbee94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.06 03:52:30, skipping insertion in model container [2024-06-28 03:52:30,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.06 03:52:30" (4/4) ... [2024-06-28 03:52:30,678 INFO L112 eAbstractionObserver]: Analyzing ICFG safe002_rmo.oepc.i [2024-06-28 03:52:30,691 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-28 03:52:30,692 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-28 03:52:30,692 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-28 03:52:30,746 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-28 03:52:30,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:52:30,803 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-28 03:52:30,803 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:52:30,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-28 03:52:30,806 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-28 03:52:30,808 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-28 03:52:30,819 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-28 03:52:30,825 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;@500015b0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-28 03:52:30,825 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-28 03:52:30,830 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-28 03:52:30,831 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-28 03:52:30,831 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-28 03:52:30,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:30,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-28 03:52:30,832 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)] === [2024-06-28 03:52:30,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:30,839 INFO L85 PathProgramCache]: Analyzing trace with hash 906645505, now seen corresponding path program 1 times [2024-06-28 03:52:30,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:30,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554758632] [2024-06-28 03:52:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:30,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:32,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:32,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554758632] [2024-06-28 03:52:32,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554758632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:32,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:32,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-28 03:52:32,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864527069] [2024-06-28 03:52:32,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:32,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-28 03:52:32,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:32,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-28 03:52:32,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-28 03:52:32,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:52:32,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:32,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:32,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:52:32,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:33,119 INFO L124 PetriNetUnfolderBase]: 1097/1694 cut-off events. [2024-06-28 03:52:33,120 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-06-28 03:52:33,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3423 conditions, 1694 events. 1097/1694 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8167 event pairs, 643 based on Foata normal form. 2/1663 useless extension candidates. Maximal degree in co-relation 3411. Up to 1653 conditions per place. [2024-06-28 03:52:33,132 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 36 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-06-28 03:52:33,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 46 transitions, 187 flow [2024-06-28 03:52:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-28 03:52:33,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-28 03:52:33,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-06-28 03:52:33,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-28 03:52:33,142 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 70 transitions. [2024-06-28 03:52:33,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 46 transitions, 187 flow [2024-06-28 03:52:33,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 182 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-28 03:52:33,148 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-28 03:52:33,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-28 03:52:33,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-28 03:52:33,152 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-28 03:52:33,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:33,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:33,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:33,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-28 03:52:33,153 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)] === [2024-06-28 03:52:33,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:33,153 INFO L85 PathProgramCache]: Analyzing trace with hash -591977984, now seen corresponding path program 1 times [2024-06-28 03:52:33,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:33,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845249216] [2024-06-28 03:52:33,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:33,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:33,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:35,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:35,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845249216] [2024-06-28 03:52:35,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845249216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:35,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:35,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-28 03:52:35,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588766083] [2024-06-28 03:52:35,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:35,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-28 03:52:35,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:35,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-28 03:52:35,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-28 03:52:35,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-28 03:52:35,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:35,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:35,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-28 03:52:35,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:35,676 INFO L124 PetriNetUnfolderBase]: 1088/1681 cut-off events. [2024-06-28 03:52:35,676 INFO L125 PetriNetUnfolderBase]: For 326/326 co-relation queries the response was YES. [2024-06-28 03:52:35,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3878 conditions, 1681 events. 1088/1681 cut-off events. For 326/326 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8204 event pairs, 496 based on Foata normal form. 4/1684 useless extension candidates. Maximal degree in co-relation 3866. Up to 1616 conditions per place. [2024-06-28 03:52:35,684 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 7 changer transitions 0/59 dead transitions. [2024-06-28 03:52:35,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 266 flow [2024-06-28 03:52:35,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-28 03:52:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-28 03:52:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-28 03:52:35,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-28 03:52:35,686 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 92 transitions. [2024-06-28 03:52:35,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 266 flow [2024-06-28 03:52:35,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-28 03:52:35,688 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-28 03:52:35,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-28 03:52:35,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-28 03:52:35,688 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-28 03:52:35,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:35,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:35,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:35,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-28 03:52:35,689 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:35,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:35,690 INFO L85 PathProgramCache]: Analyzing trace with hash -478703922, now seen corresponding path program 1 times [2024-06-28 03:52:35,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:35,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549371196] [2024-06-28 03:52:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:35,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:38,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:38,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549371196] [2024-06-28 03:52:38,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549371196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:38,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:38,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:52:38,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630007815] [2024-06-28 03:52:38,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:38,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:52:38,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:38,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:52:38,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:52:38,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:52:38,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:38,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:38,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:52:38,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:39,259 INFO L124 PetriNetUnfolderBase]: 1377/2089 cut-off events. [2024-06-28 03:52:39,259 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2024-06-28 03:52:39,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5323 conditions, 2089 events. 1377/2089 cut-off events. For 1089/1089 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9831 event pairs, 416 based on Foata normal form. 8/2096 useless extension candidates. Maximal degree in co-relation 5309. Up to 1964 conditions per place. [2024-06-28 03:52:39,271 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 63 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-28 03:52:39,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 398 flow [2024-06-28 03:52:39,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:52:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:52:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-28 03:52:39,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-28 03:52:39,276 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 126 transitions. [2024-06-28 03:52:39,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 398 flow [2024-06-28 03:52:39,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 80 transitions, 378 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-28 03:52:39,279 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-28 03:52:39,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-28 03:52:39,280 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-28 03:52:39,280 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-28 03:52:39,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:39,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:39,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:39,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-28 03:52:39,281 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)] === [2024-06-28 03:52:39,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1961594941, now seen corresponding path program 1 times [2024-06-28 03:52:39,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:39,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662821772] [2024-06-28 03:52:39,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:39,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:40,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:40,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:40,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662821772] [2024-06-28 03:52:40,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662821772] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:40,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:40,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-28 03:52:40,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093156272] [2024-06-28 03:52:40,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:40,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-28 03:52:40,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:40,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-28 03:52:40,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-28 03:52:40,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:40,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:40,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:40,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:40,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:41,482 INFO L124 PetriNetUnfolderBase]: 1369/2078 cut-off events. [2024-06-28 03:52:41,483 INFO L125 PetriNetUnfolderBase]: For 2042/2042 co-relation queries the response was YES. [2024-06-28 03:52:41,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5812 conditions, 2078 events. 1369/2078 cut-off events. For 2042/2042 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9784 event pairs, 527 based on Foata normal form. 3/2080 useless extension candidates. Maximal degree in co-relation 5795. Up to 2033 conditions per place. [2024-06-28 03:52:41,493 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 50 selfloop transitions, 8 changer transitions 0/62 dead transitions. [2024-06-28 03:52:41,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 349 flow [2024-06-28 03:52:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:52:41,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:52:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-28 03:52:41,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-28 03:52:41,495 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 87 transitions. [2024-06-28 03:52:41,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 349 flow [2024-06-28 03:52:41,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 62 transitions, 322 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-28 03:52:41,500 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-28 03:52:41,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-28 03:52:41,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-28 03:52:41,502 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-28 03:52:41,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:41,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:41,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:41,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-28 03:52:41,503 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)] === [2024-06-28 03:52:41,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:41,504 INFO L85 PathProgramCache]: Analyzing trace with hash -679899700, now seen corresponding path program 1 times [2024-06-28 03:52:41,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:41,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687060105] [2024-06-28 03:52:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:41,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:41,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:43,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:43,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687060105] [2024-06-28 03:52:43,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687060105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:43,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:43,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:52:43,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886432980] [2024-06-28 03:52:43,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:43,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:52:43,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:43,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:52:43,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:52:43,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:43,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:43,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:43,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:43,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:44,152 INFO L124 PetriNetUnfolderBase]: 1359/2062 cut-off events. [2024-06-28 03:52:44,152 INFO L125 PetriNetUnfolderBase]: For 2884/2884 co-relation queries the response was YES. [2024-06-28 03:52:44,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6200 conditions, 2062 events. 1359/2062 cut-off events. For 2884/2884 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9487 event pairs, 566 based on Foata normal form. 4/2065 useless extension candidates. Maximal degree in co-relation 6181. Up to 2005 conditions per place. [2024-06-28 03:52:44,163 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-28 03:52:44,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 75 transitions, 430 flow [2024-06-28 03:52:44,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:52:44,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:52:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 03:52:44,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-28 03:52:44,166 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 6 states and 101 transitions. [2024-06-28 03:52:44,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 75 transitions, 430 flow [2024-06-28 03:52:44,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 75 transitions, 403 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-28 03:52:44,174 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 265 flow [2024-06-28 03:52:44,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-28 03:52:44,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-28 03:52:44,176 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 265 flow [2024-06-28 03:52:44,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:44,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:44,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:44,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-28 03:52:44,177 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)] === [2024-06-28 03:52:44,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:44,178 INFO L85 PathProgramCache]: Analyzing trace with hash 392225282, now seen corresponding path program 1 times [2024-06-28 03:52:44,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:44,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929031309] [2024-06-28 03:52:44,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:44,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:46,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:46,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929031309] [2024-06-28 03:52:46,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929031309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:46,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:46,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:52:46,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412275136] [2024-06-28 03:52:46,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:46,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:52:46,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:46,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:52:46,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:52:46,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:46,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:46,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:46,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:46,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:47,440 INFO L124 PetriNetUnfolderBase]: 1377/2091 cut-off events. [2024-06-28 03:52:47,441 INFO L125 PetriNetUnfolderBase]: For 4101/4103 co-relation queries the response was YES. [2024-06-28 03:52:47,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6825 conditions, 2091 events. 1377/2091 cut-off events. For 4101/4103 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9774 event pairs, 507 based on Foata normal form. 5/2095 useless extension candidates. Maximal degree in co-relation 6803. Up to 1985 conditions per place. [2024-06-28 03:52:47,453 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 65 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-28 03:52:47,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 88 transitions, 557 flow [2024-06-28 03:52:47,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:52:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:52:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-28 03:52:47,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 03:52:47,454 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 265 flow. Second operand 6 states and 111 transitions. [2024-06-28 03:52:47,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 88 transitions, 557 flow [2024-06-28 03:52:47,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 88 transitions, 551 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-28 03:52:47,460 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 347 flow [2024-06-28 03:52:47,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=347, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-28 03:52:47,463 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-28 03:52:47,463 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 347 flow [2024-06-28 03:52:47,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:47,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:47,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:47,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-28 03:52:47,464 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:52:47,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:47,464 INFO L85 PathProgramCache]: Analyzing trace with hash 885022052, now seen corresponding path program 2 times [2024-06-28 03:52:47,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:47,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424083051] [2024-06-28 03:52:47,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:47,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:47,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:49,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:49,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424083051] [2024-06-28 03:52:49,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424083051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:49,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:49,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:52:49,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585877214] [2024-06-28 03:52:49,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:49,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:52:49,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:49,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:52:49,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:52:49,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:49,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:49,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:49,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:49,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:50,743 INFO L124 PetriNetUnfolderBase]: 1369/2081 cut-off events. [2024-06-28 03:52:50,744 INFO L125 PetriNetUnfolderBase]: For 5638/5640 co-relation queries the response was YES. [2024-06-28 03:52:50,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7328 conditions, 2081 events. 1369/2081 cut-off events. For 5638/5640 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9733 event pairs, 510 based on Foata normal form. 5/2085 useless extension candidates. Maximal degree in co-relation 7303. Up to 1978 conditions per place. [2024-06-28 03:52:50,758 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 19 changer transitions 0/83 dead transitions. [2024-06-28 03:52:50,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 563 flow [2024-06-28 03:52:50,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:52:50,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:52:50,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-28 03:52:50,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 03:52:50,760 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 347 flow. Second operand 6 states and 105 transitions. [2024-06-28 03:52:50,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 563 flow [2024-06-28 03:52:50,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 83 transitions, 530 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-28 03:52:50,765 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 361 flow [2024-06-28 03:52:50,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-28 03:52:50,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-28 03:52:50,766 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 361 flow [2024-06-28 03:52:50,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:50,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:50,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:50,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-28 03:52:50,767 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)] === [2024-06-28 03:52:50,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:50,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1603429801, now seen corresponding path program 1 times [2024-06-28 03:52:50,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:50,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73718941] [2024-06-28 03:52:50,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:50,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:54,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:54,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73718941] [2024-06-28 03:52:54,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73718941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:54,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:54,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:52:54,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915130391] [2024-06-28 03:52:54,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:54,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:52:54,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:54,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:52:54,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:52:54,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:54,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:54,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:54,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:54,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:55,318 INFO L124 PetriNetUnfolderBase]: 1447/2205 cut-off events. [2024-06-28 03:52:55,318 INFO L125 PetriNetUnfolderBase]: For 6827/6829 co-relation queries the response was YES. [2024-06-28 03:52:55,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7901 conditions, 2205 events. 1447/2205 cut-off events. For 6827/6829 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10375 event pairs, 504 based on Foata normal form. 5/2209 useless extension candidates. Maximal degree in co-relation 7874. Up to 2064 conditions per place. [2024-06-28 03:52:55,333 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 83 selfloop transitions, 27 changer transitions 0/114 dead transitions. [2024-06-28 03:52:55,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 767 flow [2024-06-28 03:52:55,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:52:55,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:52:55,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-28 03:52:55,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-28 03:52:55,336 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 361 flow. Second operand 8 states and 145 transitions. [2024-06-28 03:52:55,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 767 flow [2024-06-28 03:52:55,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 114 transitions, 703 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 03:52:55,343 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 477 flow [2024-06-28 03:52:55,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=477, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-06-28 03:52:55,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-28 03:52:55,345 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 477 flow [2024-06-28 03:52:55,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:55,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:55,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:55,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-28 03:52:55,345 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)] === [2024-06-28 03:52:55,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:55,346 INFO L85 PathProgramCache]: Analyzing trace with hash -726036975, now seen corresponding path program 2 times [2024-06-28 03:52:55,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:55,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525811748] [2024-06-28 03:52:55,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:55,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:52:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:52:58,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:52:58,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525811748] [2024-06-28 03:52:58,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525811748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:52:58,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:52:58,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:52:58,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412210687] [2024-06-28 03:52:58,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:52:58,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:52:58,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:52:58,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:52:58,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:52:58,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:52:58,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 477 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:58,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:52:58,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:52:58,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:52:59,229 INFO L124 PetriNetUnfolderBase]: 1465/2243 cut-off events. [2024-06-28 03:52:59,230 INFO L125 PetriNetUnfolderBase]: For 8828/8832 co-relation queries the response was YES. [2024-06-28 03:52:59,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8693 conditions, 2243 events. 1465/2243 cut-off events. For 8828/8832 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10609 event pairs, 486 based on Foata normal form. 7/2249 useless extension candidates. Maximal degree in co-relation 8664. Up to 2064 conditions per place. [2024-06-28 03:52:59,242 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 82 selfloop transitions, 28 changer transitions 0/114 dead transitions. [2024-06-28 03:52:59,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 114 transitions, 839 flow [2024-06-28 03:52:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:52:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:52:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-28 03:52:59,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-28 03:52:59,243 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 477 flow. Second operand 7 states and 127 transitions. [2024-06-28 03:52:59,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 114 transitions, 839 flow [2024-06-28 03:52:59,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 114 transitions, 793 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-28 03:52:59,251 INFO L231 Difference]: Finished difference. Result has 74 places, 79 transitions, 534 flow [2024-06-28 03:52:59,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=534, PETRI_PLACES=74, PETRI_TRANSITIONS=79} [2024-06-28 03:52:59,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-28 03:52:59,251 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 79 transitions, 534 flow [2024-06-28 03:52:59,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:52:59,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:52:59,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:52:59,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-28 03:52:59,252 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)] === [2024-06-28 03:52:59,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:52:59,253 INFO L85 PathProgramCache]: Analyzing trace with hash -725917005, now seen corresponding path program 3 times [2024-06-28 03:52:59,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:52:59,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106841810] [2024-06-28 03:52:59,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:52:59,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:52:59,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:01,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:01,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106841810] [2024-06-28 03:53:01,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106841810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:01,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:01,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:01,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783940415] [2024-06-28 03:53:01,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:01,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:01,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:01,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:01,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:02,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:02,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 79 transitions, 534 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:02,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:02,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:02,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:03,234 INFO L124 PetriNetUnfolderBase]: 1483/2269 cut-off events. [2024-06-28 03:53:03,234 INFO L125 PetriNetUnfolderBase]: For 11568/11572 co-relation queries the response was YES. [2024-06-28 03:53:03,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9355 conditions, 2269 events. 1483/2269 cut-off events. For 11568/11572 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10740 event pairs, 506 based on Foata normal form. 5/2273 useless extension candidates. Maximal degree in co-relation 9325. Up to 1998 conditions per place. [2024-06-28 03:53:03,246 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 73 selfloop transitions, 40 changer transitions 0/117 dead transitions. [2024-06-28 03:53:03,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 117 transitions, 962 flow [2024-06-28 03:53:03,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:03,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-28 03:53:03,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-28 03:53:03,248 INFO L175 Difference]: Start difference. First operand has 74 places, 79 transitions, 534 flow. Second operand 7 states and 129 transitions. [2024-06-28 03:53:03,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 117 transitions, 962 flow [2024-06-28 03:53:03,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 899 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:03,257 INFO L231 Difference]: Finished difference. Result has 76 places, 85 transitions, 633 flow [2024-06-28 03:53:03,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=633, PETRI_PLACES=76, PETRI_TRANSITIONS=85} [2024-06-28 03:53:03,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-28 03:53:03,258 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 85 transitions, 633 flow [2024-06-28 03:53:03,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:03,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:03,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:03,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-28 03:53:03,258 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)] === [2024-06-28 03:53:03,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:03,259 INFO L85 PathProgramCache]: Analyzing trace with hash -171857285, now seen corresponding path program 1 times [2024-06-28 03:53:03,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:03,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489450896] [2024-06-28 03:53:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:03,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:03,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:05,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:05,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489450896] [2024-06-28 03:53:05,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489450896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:05,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:05,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:05,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327745207] [2024-06-28 03:53:05,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:05,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:05,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:05,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:05,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:05,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:05,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 85 transitions, 633 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:05,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:05,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:05,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:06,906 INFO L124 PetriNetUnfolderBase]: 1711/2598 cut-off events. [2024-06-28 03:53:06,906 INFO L125 PetriNetUnfolderBase]: For 15803/15809 co-relation queries the response was YES. [2024-06-28 03:53:06,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11040 conditions, 2598 events. 1711/2598 cut-off events. For 15803/15809 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12395 event pairs, 510 based on Foata normal form. 16/2613 useless extension candidates. Maximal degree in co-relation 11009. Up to 2270 conditions per place. [2024-06-28 03:53:06,919 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 107 selfloop transitions, 36 changer transitions 0/147 dead transitions. [2024-06-28 03:53:06,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 147 transitions, 1223 flow [2024-06-28 03:53:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:53:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:53:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-28 03:53:06,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-28 03:53:06,921 INFO L175 Difference]: Start difference. First operand has 76 places, 85 transitions, 633 flow. Second operand 9 states and 166 transitions. [2024-06-28 03:53:06,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 147 transitions, 1223 flow [2024-06-28 03:53:06,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 147 transitions, 1176 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 03:53:06,933 INFO L231 Difference]: Finished difference. Result has 84 places, 99 transitions, 781 flow [2024-06-28 03:53:06,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=586, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=781, PETRI_PLACES=84, PETRI_TRANSITIONS=99} [2024-06-28 03:53:06,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 41 predicate places. [2024-06-28 03:53:06,934 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 99 transitions, 781 flow [2024-06-28 03:53:06,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:06,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:06,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:06,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-28 03:53:06,935 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:06,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:06,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1665880977, now seen corresponding path program 4 times [2024-06-28 03:53:06,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:06,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227427533] [2024-06-28 03:53:06,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:06,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:06,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:09,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:09,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:09,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227427533] [2024-06-28 03:53:09,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227427533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:09,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:09,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:09,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622314357] [2024-06-28 03:53:09,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:09,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:09,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:09,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:09,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:09,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:09,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 99 transitions, 781 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:09,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:09,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:09,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:10,446 INFO L124 PetriNetUnfolderBase]: 1703/2578 cut-off events. [2024-06-28 03:53:10,446 INFO L125 PetriNetUnfolderBase]: For 19237/19243 co-relation queries the response was YES. [2024-06-28 03:53:10,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12231 conditions, 2578 events. 1703/2578 cut-off events. For 19237/19243 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12193 event pairs, 544 based on Foata normal form. 4/2580 useless extension candidates. Maximal degree in co-relation 12196. Up to 2311 conditions per place. [2024-06-28 03:53:10,462 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 40 changer transitions 0/127 dead transitions. [2024-06-28 03:53:10,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 127 transitions, 1135 flow [2024-06-28 03:53:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-28 03:53:10,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-28 03:53:10,464 INFO L175 Difference]: Start difference. First operand has 84 places, 99 transitions, 781 flow. Second operand 7 states and 123 transitions. [2024-06-28 03:53:10,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 127 transitions, 1135 flow [2024-06-28 03:53:10,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 127 transitions, 1060 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 03:53:10,480 INFO L231 Difference]: Finished difference. Result has 87 places, 99 transitions, 794 flow [2024-06-28 03:53:10,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=794, PETRI_PLACES=87, PETRI_TRANSITIONS=99} [2024-06-28 03:53:10,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-28 03:53:10,481 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 99 transitions, 794 flow [2024-06-28 03:53:10,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:10,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:10,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:10,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-28 03:53:10,481 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:10,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:10,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1167416973, now seen corresponding path program 2 times [2024-06-28 03:53:10,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:10,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142208719] [2024-06-28 03:53:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:10,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:12,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:12,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:12,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142208719] [2024-06-28 03:53:12,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142208719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:12,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:12,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:12,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528430551] [2024-06-28 03:53:12,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:12,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:12,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:12,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:12,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:12,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:12,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 99 transitions, 794 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:12,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:12,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:12,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:13,767 INFO L124 PetriNetUnfolderBase]: 1693/2566 cut-off events. [2024-06-28 03:53:13,767 INFO L125 PetriNetUnfolderBase]: For 20490/20496 co-relation queries the response was YES. [2024-06-28 03:53:13,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12383 conditions, 2566 events. 1693/2566 cut-off events. For 20490/20496 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11975 event pairs, 536 based on Foata normal form. 10/2575 useless extension candidates. Maximal degree in co-relation 12346. Up to 2351 conditions per place. [2024-06-28 03:53:13,782 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 113 selfloop transitions, 31 changer transitions 0/148 dead transitions. [2024-06-28 03:53:13,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 148 transitions, 1381 flow [2024-06-28 03:53:13,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:13,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:53:13,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:53:13,784 INFO L175 Difference]: Start difference. First operand has 87 places, 99 transitions, 794 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:53:13,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 148 transitions, 1381 flow [2024-06-28 03:53:13,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 148 transitions, 1262 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-28 03:53:13,801 INFO L231 Difference]: Finished difference. Result has 93 places, 119 transitions, 976 flow [2024-06-28 03:53:13,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=976, PETRI_PLACES=93, PETRI_TRANSITIONS=119} [2024-06-28 03:53:13,802 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-28 03:53:13,802 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 119 transitions, 976 flow [2024-06-28 03:53:13,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:13,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:13,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:13,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-28 03:53:13,803 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:13,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:13,803 INFO L85 PathProgramCache]: Analyzing trace with hash -548785299, now seen corresponding path program 3 times [2024-06-28 03:53:13,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:13,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557080347] [2024-06-28 03:53:13,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:13,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:16,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:16,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557080347] [2024-06-28 03:53:16,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557080347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:16,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:16,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:53:16,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891976045] [2024-06-28 03:53:16,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:16,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:53:16,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:16,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:53:16,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:53:16,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:16,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 119 transitions, 976 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:16,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:16,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:16,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:17,150 INFO L124 PetriNetUnfolderBase]: 1705/2584 cut-off events. [2024-06-28 03:53:17,150 INFO L125 PetriNetUnfolderBase]: For 23130/23144 co-relation queries the response was YES. [2024-06-28 03:53:17,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13019 conditions, 2584 events. 1705/2584 cut-off events. For 23130/23144 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12168 event pairs, 564 based on Foata normal form. 24/2607 useless extension candidates. Maximal degree in co-relation 12977. Up to 2358 conditions per place. [2024-06-28 03:53:17,166 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 111 selfloop transitions, 42 changer transitions 0/157 dead transitions. [2024-06-28 03:53:17,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 157 transitions, 1474 flow [2024-06-28 03:53:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:17,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 03:53:17,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-28 03:53:17,168 INFO L175 Difference]: Start difference. First operand has 93 places, 119 transitions, 976 flow. Second operand 8 states and 139 transitions. [2024-06-28 03:53:17,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 157 transitions, 1474 flow [2024-06-28 03:53:17,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 157 transitions, 1430 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-28 03:53:17,193 INFO L231 Difference]: Finished difference. Result has 101 places, 126 transitions, 1121 flow [2024-06-28 03:53:17,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1121, PETRI_PLACES=101, PETRI_TRANSITIONS=126} [2024-06-28 03:53:17,194 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-28 03:53:17,194 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 126 transitions, 1121 flow [2024-06-28 03:53:17,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:17,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:17,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:17,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-28 03:53:17,195 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:17,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:17,195 INFO L85 PathProgramCache]: Analyzing trace with hash -548539221, now seen corresponding path program 1 times [2024-06-28 03:53:17,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:17,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318222132] [2024-06-28 03:53:17,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:17,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:20,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:20,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318222132] [2024-06-28 03:53:20,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318222132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:20,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:20,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:20,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787773096] [2024-06-28 03:53:20,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:20,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:20,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:20,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:20,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:20,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:20,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 126 transitions, 1121 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:20,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:20,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:20,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:21,369 INFO L124 PetriNetUnfolderBase]: 1697/2568 cut-off events. [2024-06-28 03:53:21,369 INFO L125 PetriNetUnfolderBase]: For 25792/25792 co-relation queries the response was YES. [2024-06-28 03:53:21,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13400 conditions, 2568 events. 1697/2568 cut-off events. For 25792/25792 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12008 event pairs, 539 based on Foata normal form. 4/2571 useless extension candidates. Maximal degree in co-relation 13354. Up to 2467 conditions per place. [2024-06-28 03:53:21,382 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 136 selfloop transitions, 13 changer transitions 0/153 dead transitions. [2024-06-28 03:53:21,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 153 transitions, 1505 flow [2024-06-28 03:53:21,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:53:21,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:53:21,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:53:21,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:53:21,384 INFO L175 Difference]: Start difference. First operand has 101 places, 126 transitions, 1121 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:53:21,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 153 transitions, 1505 flow [2024-06-28 03:53:21,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 153 transitions, 1429 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-28 03:53:21,408 INFO L231 Difference]: Finished difference. Result has 104 places, 128 transitions, 1100 flow [2024-06-28 03:53:21,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1100, PETRI_PLACES=104, PETRI_TRANSITIONS=128} [2024-06-28 03:53:21,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-28 03:53:21,409 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 128 transitions, 1100 flow [2024-06-28 03:53:21,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:21,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:21,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:21,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-28 03:53:21,410 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:21,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:21,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1813896292, now seen corresponding path program 1 times [2024-06-28 03:53:21,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:21,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255113999] [2024-06-28 03:53:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:21,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:24,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:24,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:24,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255113999] [2024-06-28 03:53:24,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255113999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:24,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:24,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:24,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428542242] [2024-06-28 03:53:24,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:24,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:24,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:24,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:24,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:24,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:24,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 128 transitions, 1100 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:24,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:24,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:24,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:25,640 INFO L124 PetriNetUnfolderBase]: 1830/2761 cut-off events. [2024-06-28 03:53:25,640 INFO L125 PetriNetUnfolderBase]: For 30507/30515 co-relation queries the response was YES. [2024-06-28 03:53:25,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14602 conditions, 2761 events. 1830/2761 cut-off events. For 30507/30515 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13136 event pairs, 509 based on Foata normal form. 18/2778 useless extension candidates. Maximal degree in co-relation 14554. Up to 2453 conditions per place. [2024-06-28 03:53:25,655 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 139 selfloop transitions, 48 changer transitions 0/191 dead transitions. [2024-06-28 03:53:25,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 191 transitions, 1849 flow [2024-06-28 03:53:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:53:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:53:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-28 03:53:25,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-28 03:53:25,657 INFO L175 Difference]: Start difference. First operand has 104 places, 128 transitions, 1100 flow. Second operand 10 states and 177 transitions. [2024-06-28 03:53:25,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 191 transitions, 1849 flow [2024-06-28 03:53:25,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 191 transitions, 1810 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:25,685 INFO L231 Difference]: Finished difference. Result has 111 places, 143 transitions, 1355 flow [2024-06-28 03:53:25,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1061, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1355, PETRI_PLACES=111, PETRI_TRANSITIONS=143} [2024-06-28 03:53:25,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-28 03:53:25,686 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 143 transitions, 1355 flow [2024-06-28 03:53:25,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:25,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:25,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:25,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-28 03:53:25,686 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:25,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1028589348, now seen corresponding path program 2 times [2024-06-28 03:53:25,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:25,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7636080] [2024-06-28 03:53:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:25,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:25,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:28,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:28,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:28,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7636080] [2024-06-28 03:53:28,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7636080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:28,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:28,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:28,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140953911] [2024-06-28 03:53:28,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:28,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:28,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:28,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:28,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:28,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:28,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 143 transitions, 1355 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:28,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:28,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:28,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:30,138 INFO L124 PetriNetUnfolderBase]: 2158/3263 cut-off events. [2024-06-28 03:53:30,138 INFO L125 PetriNetUnfolderBase]: For 43750/43752 co-relation queries the response was YES. [2024-06-28 03:53:30,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18697 conditions, 3263 events. 2158/3263 cut-off events. For 43750/43752 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15980 event pairs, 585 based on Foata normal form. 12/3274 useless extension candidates. Maximal degree in co-relation 18646. Up to 2310 conditions per place. [2024-06-28 03:53:30,159 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 132 selfloop transitions, 91 changer transitions 0/227 dead transitions. [2024-06-28 03:53:30,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 227 transitions, 2464 flow [2024-06-28 03:53:30,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:53:30,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:53:30,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-28 03:53:30,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46320346320346323 [2024-06-28 03:53:30,163 INFO L175 Difference]: Start difference. First operand has 111 places, 143 transitions, 1355 flow. Second operand 11 states and 214 transitions. [2024-06-28 03:53:30,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 227 transitions, 2464 flow [2024-06-28 03:53:30,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 227 transitions, 2312 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-28 03:53:30,203 INFO L231 Difference]: Finished difference. Result has 118 places, 160 transitions, 1649 flow [2024-06-28 03:53:30,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1649, PETRI_PLACES=118, PETRI_TRANSITIONS=160} [2024-06-28 03:53:30,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-28 03:53:30,204 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 160 transitions, 1649 flow [2024-06-28 03:53:30,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:30,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:30,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:30,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-28 03:53:30,205 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:30,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:30,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1028583768, now seen corresponding path program 3 times [2024-06-28 03:53:30,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:30,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674397025] [2024-06-28 03:53:30,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:30,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:33,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:33,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674397025] [2024-06-28 03:53:33,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674397025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:33,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:33,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:33,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690841205] [2024-06-28 03:53:33,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:33,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:33,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:33,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:33,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:33,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:33,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 160 transitions, 1649 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:33,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:33,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:33,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:34,408 INFO L124 PetriNetUnfolderBase]: 2202/3325 cut-off events. [2024-06-28 03:53:34,408 INFO L125 PetriNetUnfolderBase]: For 51928/51930 co-relation queries the response was YES. [2024-06-28 03:53:34,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20335 conditions, 3325 events. 2202/3325 cut-off events. For 51928/51930 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16293 event pairs, 547 based on Foata normal form. 12/3336 useless extension candidates. Maximal degree in co-relation 20281. Up to 2347 conditions per place. [2024-06-28 03:53:34,426 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 118 selfloop transitions, 101 changer transitions 0/223 dead transitions. [2024-06-28 03:53:34,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 223 transitions, 2589 flow [2024-06-28 03:53:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:53:34,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:53:34,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-28 03:53:34,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-28 03:53:34,428 INFO L175 Difference]: Start difference. First operand has 118 places, 160 transitions, 1649 flow. Second operand 10 states and 191 transitions. [2024-06-28 03:53:34,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 223 transitions, 2589 flow [2024-06-28 03:53:34,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 223 transitions, 2432 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:34,473 INFO L231 Difference]: Finished difference. Result has 125 places, 169 transitions, 1911 flow [2024-06-28 03:53:34,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1911, PETRI_PLACES=125, PETRI_TRANSITIONS=169} [2024-06-28 03:53:34,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 82 predicate places. [2024-06-28 03:53:34,474 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 169 transitions, 1911 flow [2024-06-28 03:53:34,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:34,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:34,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:34,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-28 03:53:34,474 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:34,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:34,475 INFO L85 PathProgramCache]: Analyzing trace with hash 110061292, now seen corresponding path program 4 times [2024-06-28 03:53:34,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:34,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258119300] [2024-06-28 03:53:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:34,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:36,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:36,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258119300] [2024-06-28 03:53:36,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258119300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:36,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:36,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:36,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803924561] [2024-06-28 03:53:36,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:36,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:36,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:36,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:36,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:36,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:36,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 169 transitions, 1911 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:36,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:36,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:36,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:38,390 INFO L124 PetriNetUnfolderBase]: 2192/3321 cut-off events. [2024-06-28 03:53:38,390 INFO L125 PetriNetUnfolderBase]: For 54603/54613 co-relation queries the response was YES. [2024-06-28 03:53:38,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21009 conditions, 3321 events. 2192/3321 cut-off events. For 54603/54613 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 16233 event pairs, 604 based on Foata normal form. 7/3327 useless extension candidates. Maximal degree in co-relation 20951. Up to 2821 conditions per place. [2024-06-28 03:53:38,410 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 170 selfloop transitions, 55 changer transitions 0/229 dead transitions. [2024-06-28 03:53:38,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 229 transitions, 2879 flow [2024-06-28 03:53:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:38,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-28 03:53:38,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-28 03:53:38,412 INFO L175 Difference]: Start difference. First operand has 125 places, 169 transitions, 1911 flow. Second operand 8 states and 141 transitions. [2024-06-28 03:53:38,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 229 transitions, 2879 flow [2024-06-28 03:53:38,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 229 transitions, 2624 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-28 03:53:38,466 INFO L231 Difference]: Finished difference. Result has 130 places, 196 transitions, 2243 flow [2024-06-28 03:53:38,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2243, PETRI_PLACES=130, PETRI_TRANSITIONS=196} [2024-06-28 03:53:38,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-28 03:53:38,467 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 196 transitions, 2243 flow [2024-06-28 03:53:38,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:38,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:38,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:38,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-28 03:53:38,467 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:38,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:38,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1822837286, now seen corresponding path program 5 times [2024-06-28 03:53:38,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:38,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357186610] [2024-06-28 03:53:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:38,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:38,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:41,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:41,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357186610] [2024-06-28 03:53:41,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357186610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:41,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:41,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:41,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715849912] [2024-06-28 03:53:41,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:41,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:41,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:41,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:41,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:41,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:41,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 196 transitions, 2243 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:41,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:41,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:41,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:42,389 INFO L124 PetriNetUnfolderBase]: 2288/3473 cut-off events. [2024-06-28 03:53:42,389 INFO L125 PetriNetUnfolderBase]: For 61251/61261 co-relation queries the response was YES. [2024-06-28 03:53:42,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22221 conditions, 3473 events. 2288/3473 cut-off events. For 61251/61261 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17202 event pairs, 641 based on Foata normal form. 13/3485 useless extension candidates. Maximal degree in co-relation 22159. Up to 2866 conditions per place. [2024-06-28 03:53:42,413 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 157 selfloop transitions, 87 changer transitions 0/248 dead transitions. [2024-06-28 03:53:42,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 248 transitions, 3196 flow [2024-06-28 03:53:42,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:53:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:53:42,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-28 03:53:42,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-28 03:53:42,414 INFO L175 Difference]: Start difference. First operand has 130 places, 196 transitions, 2243 flow. Second operand 9 states and 165 transitions. [2024-06-28 03:53:42,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 248 transitions, 3196 flow [2024-06-28 03:53:42,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 248 transitions, 3094 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-28 03:53:42,478 INFO L231 Difference]: Finished difference. Result has 138 places, 208 transitions, 2576 flow [2024-06-28 03:53:42,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2576, PETRI_PLACES=138, PETRI_TRANSITIONS=208} [2024-06-28 03:53:42,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-28 03:53:42,479 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 208 transitions, 2576 flow [2024-06-28 03:53:42,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:42,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:42,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:42,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-28 03:53:42,479 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:42,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:42,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1822831706, now seen corresponding path program 6 times [2024-06-28 03:53:42,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:42,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150524941] [2024-06-28 03:53:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:42,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:42,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:45,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:45,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150524941] [2024-06-28 03:53:45,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150524941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:45,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:45,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:45,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779118001] [2024-06-28 03:53:45,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:45,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:45,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:45,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:45,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:45,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:45,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 208 transitions, 2576 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:45,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:45,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:45,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:46,505 INFO L124 PetriNetUnfolderBase]: 2268/3447 cut-off events. [2024-06-28 03:53:46,505 INFO L125 PetriNetUnfolderBase]: For 65673/65683 co-relation queries the response was YES. [2024-06-28 03:53:46,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22520 conditions, 3447 events. 2268/3447 cut-off events. For 65673/65683 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 17075 event pairs, 654 based on Foata normal form. 13/3459 useless extension candidates. Maximal degree in co-relation 22454. Up to 2855 conditions per place. [2024-06-28 03:53:46,530 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 165 selfloop transitions, 87 changer transitions 0/256 dead transitions. [2024-06-28 03:53:46,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 256 transitions, 3303 flow [2024-06-28 03:53:46,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:53:46,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:53:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-28 03:53:46,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-28 03:53:46,531 INFO L175 Difference]: Start difference. First operand has 138 places, 208 transitions, 2576 flow. Second operand 10 states and 184 transitions. [2024-06-28 03:53:46,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 256 transitions, 3303 flow [2024-06-28 03:53:46,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 256 transitions, 3024 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:46,609 INFO L231 Difference]: Finished difference. Result has 143 places, 208 transitions, 2485 flow [2024-06-28 03:53:46,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2485, PETRI_PLACES=143, PETRI_TRANSITIONS=208} [2024-06-28 03:53:46,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-28 03:53:46,610 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 208 transitions, 2485 flow [2024-06-28 03:53:46,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:46,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:46,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:46,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-28 03:53:46,611 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:46,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:46,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1891700116, now seen corresponding path program 1 times [2024-06-28 03:53:46,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:46,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175591203] [2024-06-28 03:53:46,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:46,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:49,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:49,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:49,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175591203] [2024-06-28 03:53:49,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175591203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:49,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:49,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:49,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15063041] [2024-06-28 03:53:49,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:49,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:49,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:49,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:49,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:49,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:49,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 208 transitions, 2485 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:49,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:49,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:49,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:51,277 INFO L124 PetriNetUnfolderBase]: 2337/3558 cut-off events. [2024-06-28 03:53:51,278 INFO L125 PetriNetUnfolderBase]: For 69672/69680 co-relation queries the response was YES. [2024-06-28 03:53:51,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23407 conditions, 3558 events. 2337/3558 cut-off events. For 69672/69680 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17880 event pairs, 488 based on Foata normal form. 14/3571 useless extension candidates. Maximal degree in co-relation 23339. Up to 3141 conditions per place. [2024-06-28 03:53:51,309 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 51 changer transitions 0/258 dead transitions. [2024-06-28 03:53:51,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 258 transitions, 3351 flow [2024-06-28 03:53:51,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:53:51,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:53:51,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 03:53:51,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:53:51,311 INFO L175 Difference]: Start difference. First operand has 143 places, 208 transitions, 2485 flow. Second operand 9 states and 162 transitions. [2024-06-28 03:53:51,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 258 transitions, 3351 flow [2024-06-28 03:53:51,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 258 transitions, 3158 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-28 03:53:51,403 INFO L231 Difference]: Finished difference. Result has 143 places, 212 transitions, 2509 flow [2024-06-28 03:53:51,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2509, PETRI_PLACES=143, PETRI_TRANSITIONS=212} [2024-06-28 03:53:51,404 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-28 03:53:51,404 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 212 transitions, 2509 flow [2024-06-28 03:53:51,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:51,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:51,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:51,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-28 03:53:51,405 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:51,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:51,405 INFO L85 PathProgramCache]: Analyzing trace with hash 178608064, now seen corresponding path program 2 times [2024-06-28 03:53:51,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:51,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462839226] [2024-06-28 03:53:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:51,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:54,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:54,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462839226] [2024-06-28 03:53:54,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462839226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:54,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:54,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:54,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761940788] [2024-06-28 03:53:54,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:54,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:54,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:54,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:54,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:54,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:54,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 212 transitions, 2509 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:54,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:54,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:54,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:53:56,050 INFO L124 PetriNetUnfolderBase]: 2324/3539 cut-off events. [2024-06-28 03:53:56,050 INFO L125 PetriNetUnfolderBase]: For 71907/71915 co-relation queries the response was YES. [2024-06-28 03:53:56,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23247 conditions, 3539 events. 2324/3539 cut-off events. For 71907/71915 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 17724 event pairs, 635 based on Foata normal form. 14/3552 useless extension candidates. Maximal degree in co-relation 23179. Up to 3241 conditions per place. [2024-06-28 03:53:56,075 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 198 selfloop transitions, 47 changer transitions 0/249 dead transitions. [2024-06-28 03:53:56,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 249 transitions, 3125 flow [2024-06-28 03:53:56,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:53:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:53:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 03:53:56,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 03:53:56,077 INFO L175 Difference]: Start difference. First operand has 143 places, 212 transitions, 2509 flow. Second operand 8 states and 143 transitions. [2024-06-28 03:53:56,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 249 transitions, 3125 flow [2024-06-28 03:53:56,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 249 transitions, 3000 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-28 03:53:56,161 INFO L231 Difference]: Finished difference. Result has 146 places, 212 transitions, 2489 flow [2024-06-28 03:53:56,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2489, PETRI_PLACES=146, PETRI_TRANSITIONS=212} [2024-06-28 03:53:56,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-28 03:53:56,162 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 212 transitions, 2489 flow [2024-06-28 03:53:56,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:56,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:53:56,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:53:56,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-28 03:53:56,163 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:53:56,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:53:56,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1210183758, now seen corresponding path program 3 times [2024-06-28 03:53:56,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:53:56,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442500247] [2024-06-28 03:53:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:53:56,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:53:56,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:53:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:53:59,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:53:59,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442500247] [2024-06-28 03:53:59,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442500247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:53:59,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:53:59,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:53:59,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659589427] [2024-06-28 03:53:59,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:53:59,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:53:59,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:53:59,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:53:59,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:53:59,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:53:59,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 212 transitions, 2489 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:53:59,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:53:59,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:53:59,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:00,762 INFO L124 PetriNetUnfolderBase]: 2352/3581 cut-off events. [2024-06-28 03:54:00,763 INFO L125 PetriNetUnfolderBase]: For 77214/77216 co-relation queries the response was YES. [2024-06-28 03:54:00,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23699 conditions, 3581 events. 2352/3581 cut-off events. For 77214/77216 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17958 event pairs, 646 based on Foata normal form. 8/3588 useless extension candidates. Maximal degree in co-relation 23629. Up to 3207 conditions per place. [2024-06-28 03:54:00,790 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 182 selfloop transitions, 63 changer transitions 0/249 dead transitions. [2024-06-28 03:54:00,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 249 transitions, 3168 flow [2024-06-28 03:54:00,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:00,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 03:54:00,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 03:54:00,791 INFO L175 Difference]: Start difference. First operand has 146 places, 212 transitions, 2489 flow. Second operand 8 states and 143 transitions. [2024-06-28 03:54:00,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 249 transitions, 3168 flow [2024-06-28 03:54:00,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 249 transitions, 3064 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-28 03:54:00,882 INFO L231 Difference]: Finished difference. Result has 147 places, 214 transitions, 2579 flow [2024-06-28 03:54:00,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2385, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2579, PETRI_PLACES=147, PETRI_TRANSITIONS=214} [2024-06-28 03:54:00,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-28 03:54:00,882 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 214 transitions, 2579 flow [2024-06-28 03:54:00,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:00,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:00,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:00,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-28 03:54:00,883 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:00,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1946050150, now seen corresponding path program 1 times [2024-06-28 03:54:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:00,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949259398] [2024-06-28 03:54:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:00,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:04,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:04,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949259398] [2024-06-28 03:54:04,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949259398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:04,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:04,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:04,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013506725] [2024-06-28 03:54:04,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:04,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:04,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:04,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:04,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:04,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 214 transitions, 2579 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:04,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:04,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:04,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:06,427 INFO L124 PetriNetUnfolderBase]: 2440/3690 cut-off events. [2024-06-28 03:54:06,427 INFO L125 PetriNetUnfolderBase]: For 88950/88960 co-relation queries the response was YES. [2024-06-28 03:54:06,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24665 conditions, 3690 events. 2440/3690 cut-off events. For 88950/88960 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18481 event pairs, 608 based on Foata normal form. 28/3717 useless extension candidates. Maximal degree in co-relation 24594. Up to 3223 conditions per place. [2024-06-28 03:54:06,457 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 209 selfloop transitions, 57 changer transitions 0/270 dead transitions. [2024-06-28 03:54:06,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 270 transitions, 3435 flow [2024-06-28 03:54:06,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:54:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:54:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-28 03:54:06,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-28 03:54:06,459 INFO L175 Difference]: Start difference. First operand has 147 places, 214 transitions, 2579 flow. Second operand 10 states and 186 transitions. [2024-06-28 03:54:06,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 270 transitions, 3435 flow [2024-06-28 03:54:06,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 270 transitions, 3275 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:06,560 INFO L231 Difference]: Finished difference. Result has 151 places, 217 transitions, 2617 flow [2024-06-28 03:54:06,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2419, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2617, PETRI_PLACES=151, PETRI_TRANSITIONS=217} [2024-06-28 03:54:06,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-28 03:54:06,561 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 217 transitions, 2617 flow [2024-06-28 03:54:06,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:06,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:06,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:06,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-28 03:54:06,561 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:06,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:06,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1111144976, now seen corresponding path program 4 times [2024-06-28 03:54:06,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:06,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230224317] [2024-06-28 03:54:06,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:06,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:09,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:09,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:09,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230224317] [2024-06-28 03:54:09,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230224317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:09,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:09,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:09,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550082526] [2024-06-28 03:54:09,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:09,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:09,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:09,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:09,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:09,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:09,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 217 transitions, 2617 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:09,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:09,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:09,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:11,072 INFO L124 PetriNetUnfolderBase]: 2427/3700 cut-off events. [2024-06-28 03:54:11,072 INFO L125 PetriNetUnfolderBase]: For 87436/87446 co-relation queries the response was YES. [2024-06-28 03:54:11,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24854 conditions, 3700 events. 2427/3700 cut-off events. For 87436/87446 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18705 event pairs, 667 based on Foata normal form. 9/3708 useless extension candidates. Maximal degree in co-relation 24782. Up to 3328 conditions per place. [2024-06-28 03:54:11,099 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 184 selfloop transitions, 63 changer transitions 0/251 dead transitions. [2024-06-28 03:54:11,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 251 transitions, 3300 flow [2024-06-28 03:54:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:11,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-28 03:54:11,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-28 03:54:11,100 INFO L175 Difference]: Start difference. First operand has 151 places, 217 transitions, 2617 flow. Second operand 8 states and 139 transitions. [2024-06-28 03:54:11,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 251 transitions, 3300 flow [2024-06-28 03:54:11,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 251 transitions, 3134 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-28 03:54:11,204 INFO L231 Difference]: Finished difference. Result has 151 places, 219 transitions, 2651 flow [2024-06-28 03:54:11,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2651, PETRI_PLACES=151, PETRI_TRANSITIONS=219} [2024-06-28 03:54:11,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-28 03:54:11,204 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 219 transitions, 2651 flow [2024-06-28 03:54:11,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:11,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:11,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:11,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-28 03:54:11,205 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:11,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:11,205 INFO L85 PathProgramCache]: Analyzing trace with hash 673389134, now seen corresponding path program 2 times [2024-06-28 03:54:11,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:11,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451643240] [2024-06-28 03:54:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:11,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:14,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:14,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451643240] [2024-06-28 03:54:14,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451643240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:14,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:14,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:14,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85328437] [2024-06-28 03:54:14,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:14,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:14,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:14,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:14,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:14,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 219 transitions, 2651 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:14,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:14,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:14,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:16,174 INFO L124 PetriNetUnfolderBase]: 2515/3829 cut-off events. [2024-06-28 03:54:16,174 INFO L125 PetriNetUnfolderBase]: For 98933/98947 co-relation queries the response was YES. [2024-06-28 03:54:16,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25581 conditions, 3829 events. 2515/3829 cut-off events. For 98933/98947 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 19427 event pairs, 629 based on Foata normal form. 32/3860 useless extension candidates. Maximal degree in co-relation 25508. Up to 3444 conditions per place. [2024-06-28 03:54:16,203 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 214 selfloop transitions, 47 changer transitions 0/265 dead transitions. [2024-06-28 03:54:16,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 265 transitions, 3444 flow [2024-06-28 03:54:16,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:54:16,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:54:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-28 03:54:16,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-28 03:54:16,205 INFO L175 Difference]: Start difference. First operand has 151 places, 219 transitions, 2651 flow. Second operand 10 states and 169 transitions. [2024-06-28 03:54:16,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 265 transitions, 3444 flow [2024-06-28 03:54:16,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 265 transitions, 3280 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:16,308 INFO L231 Difference]: Finished difference. Result has 155 places, 222 transitions, 2673 flow [2024-06-28 03:54:16,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2487, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2673, PETRI_PLACES=155, PETRI_TRANSITIONS=222} [2024-06-28 03:54:16,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-28 03:54:16,309 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 222 transitions, 2673 flow [2024-06-28 03:54:16,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:16,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:16,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:16,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-28 03:54:16,309 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:16,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:16,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1134523916, now seen corresponding path program 3 times [2024-06-28 03:54:16,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:16,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593741097] [2024-06-28 03:54:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:16,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:19,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:19,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:19,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593741097] [2024-06-28 03:54:19,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593741097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:19,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:19,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:54:19,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201172472] [2024-06-28 03:54:19,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:19,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:54:19,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:19,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:54:19,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:54:19,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:19,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 222 transitions, 2673 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:19,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:19,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:19,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:20,913 INFO L124 PetriNetUnfolderBase]: 2535/3878 cut-off events. [2024-06-28 03:54:20,914 INFO L125 PetriNetUnfolderBase]: For 99456/99470 co-relation queries the response was YES. [2024-06-28 03:54:20,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26122 conditions, 3878 events. 2535/3878 cut-off events. For 99456/99470 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19733 event pairs, 619 based on Foata normal form. 18/3895 useless extension candidates. Maximal degree in co-relation 26048. Up to 3571 conditions per place. [2024-06-28 03:54:20,948 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 221 selfloop transitions, 31 changer transitions 0/256 dead transitions. [2024-06-28 03:54:20,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 256 transitions, 3307 flow [2024-06-28 03:54:20,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:20,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:54:20,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:54:20,949 INFO L175 Difference]: Start difference. First operand has 155 places, 222 transitions, 2673 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:54:20,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 256 transitions, 3307 flow [2024-06-28 03:54:21,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 256 transitions, 3168 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 03:54:21,084 INFO L231 Difference]: Finished difference. Result has 156 places, 224 transitions, 2647 flow [2024-06-28 03:54:21,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2534, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2647, PETRI_PLACES=156, PETRI_TRANSITIONS=224} [2024-06-28 03:54:21,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 113 predicate places. [2024-06-28 03:54:21,085 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 224 transitions, 2647 flow [2024-06-28 03:54:21,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:21,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:21,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:21,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-28 03:54:21,089 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:21,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:21,089 INFO L85 PathProgramCache]: Analyzing trace with hash 909861164, now seen corresponding path program 4 times [2024-06-28 03:54:21,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:21,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333476892] [2024-06-28 03:54:21,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:21,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:24,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:24,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333476892] [2024-06-28 03:54:24,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333476892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:24,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:24,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:24,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110192059] [2024-06-28 03:54:24,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:24,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:24,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:24,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:24,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:24,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:24,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 224 transitions, 2647 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:24,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:24,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:24,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:25,592 INFO L124 PetriNetUnfolderBase]: 2527/3870 cut-off events. [2024-06-28 03:54:25,592 INFO L125 PetriNetUnfolderBase]: For 103140/103154 co-relation queries the response was YES. [2024-06-28 03:54:25,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26034 conditions, 3870 events. 2527/3870 cut-off events. For 103140/103154 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 19698 event pairs, 587 based on Foata normal form. 18/3887 useless extension candidates. Maximal degree in co-relation 25959. Up to 3465 conditions per place. [2024-06-28 03:54:25,677 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 38 changer transitions 0/260 dead transitions. [2024-06-28 03:54:25,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 260 transitions, 3309 flow [2024-06-28 03:54:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:54:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:54:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:54:25,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:54:25,679 INFO L175 Difference]: Start difference. First operand has 156 places, 224 transitions, 2647 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:54:25,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 260 transitions, 3309 flow [2024-06-28 03:54:25,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 260 transitions, 3214 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-28 03:54:25,784 INFO L231 Difference]: Finished difference. Result has 159 places, 228 transitions, 2715 flow [2024-06-28 03:54:25,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2552, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2715, PETRI_PLACES=159, PETRI_TRANSITIONS=228} [2024-06-28 03:54:25,785 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-28 03:54:25,785 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 228 transitions, 2715 flow [2024-06-28 03:54:25,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:25,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:25,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:25,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-28 03:54:25,786 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)] === [2024-06-28 03:54:25,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:25,786 INFO L85 PathProgramCache]: Analyzing trace with hash -941946020, now seen corresponding path program 1 times [2024-06-28 03:54:25,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:25,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066036025] [2024-06-28 03:54:25,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:25,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:27,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:27,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066036025] [2024-06-28 03:54:27,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066036025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:27,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:27,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-28 03:54:27,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670452438] [2024-06-28 03:54:27,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:27,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-28 03:54:27,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:27,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-28 03:54:27,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-28 03:54:27,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:54:27,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 228 transitions, 2715 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:27,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:27,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:54:27,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:28,766 INFO L124 PetriNetUnfolderBase]: 2278/3546 cut-off events. [2024-06-28 03:54:28,766 INFO L125 PetriNetUnfolderBase]: For 104594/104636 co-relation queries the response was YES. [2024-06-28 03:54:28,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24761 conditions, 3546 events. 2278/3546 cut-off events. For 104594/104636 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18614 event pairs, 614 based on Foata normal form. 16/3517 useless extension candidates. Maximal degree in co-relation 24684. Up to 3239 conditions per place. [2024-06-28 03:54:28,795 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 203 selfloop transitions, 10 changer transitions 0/241 dead transitions. [2024-06-28 03:54:28,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 241 transitions, 3195 flow [2024-06-28 03:54:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-28 03:54:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-28 03:54:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-28 03:54:28,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-28 03:54:28,797 INFO L175 Difference]: Start difference. First operand has 159 places, 228 transitions, 2715 flow. Second operand 5 states and 86 transitions. [2024-06-28 03:54:28,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 241 transitions, 3195 flow [2024-06-28 03:54:28,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 241 transitions, 3086 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-28 03:54:28,917 INFO L231 Difference]: Finished difference. Result has 159 places, 231 transitions, 2666 flow [2024-06-28 03:54:28,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2606, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2666, PETRI_PLACES=159, PETRI_TRANSITIONS=231} [2024-06-28 03:54:28,918 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-28 03:54:28,918 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 231 transitions, 2666 flow [2024-06-28 03:54:28,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:54:28,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:28,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:28,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-28 03:54:28,918 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:28,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:28,919 INFO L85 PathProgramCache]: Analyzing trace with hash -774185243, now seen corresponding path program 1 times [2024-06-28 03:54:28,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:28,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376422571] [2024-06-28 03:54:28,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:28,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:33,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:33,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376422571] [2024-06-28 03:54:33,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376422571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:33,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:33,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:33,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330734006] [2024-06-28 03:54:33,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:33,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:33,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:33,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:33,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:33,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:33,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 231 transitions, 2666 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:33,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:33,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:33,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:35,802 INFO L124 PetriNetUnfolderBase]: 3559/5521 cut-off events. [2024-06-28 03:54:35,803 INFO L125 PetriNetUnfolderBase]: For 214219/214227 co-relation queries the response was YES. [2024-06-28 03:54:35,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38039 conditions, 5521 events. 3559/5521 cut-off events. For 214219/214227 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 30947 event pairs, 772 based on Foata normal form. 72/5592 useless extension candidates. Maximal degree in co-relation 37961. Up to 3288 conditions per place. [2024-06-28 03:54:35,848 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 261 selfloop transitions, 62 changer transitions 0/327 dead transitions. [2024-06-28 03:54:35,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 327 transitions, 4271 flow [2024-06-28 03:54:35,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:54:35,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:54:35,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 230 transitions. [2024-06-28 03:54:35,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-28 03:54:35,849 INFO L175 Difference]: Start difference. First operand has 159 places, 231 transitions, 2666 flow. Second operand 12 states and 230 transitions. [2024-06-28 03:54:35,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 327 transitions, 4271 flow [2024-06-28 03:54:36,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 327 transitions, 4233 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-28 03:54:36,045 INFO L231 Difference]: Finished difference. Result has 170 places, 239 transitions, 2996 flow [2024-06-28 03:54:36,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2996, PETRI_PLACES=170, PETRI_TRANSITIONS=239} [2024-06-28 03:54:36,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-28 03:54:36,045 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 239 transitions, 2996 flow [2024-06-28 03:54:36,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:36,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:36,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:36,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-28 03:54:36,046 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:36,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:36,046 INFO L85 PathProgramCache]: Analyzing trace with hash 602423099, now seen corresponding path program 2 times [2024-06-28 03:54:36,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:36,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288715549] [2024-06-28 03:54:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:36,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:39,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:39,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288715549] [2024-06-28 03:54:39,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288715549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:39,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:39,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:39,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390384116] [2024-06-28 03:54:39,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:39,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:39,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:39,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:39,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:39,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:39,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 239 transitions, 2996 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:39,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:39,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:39,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:41,969 INFO L124 PetriNetUnfolderBase]: 3830/5982 cut-off events. [2024-06-28 03:54:41,969 INFO L125 PetriNetUnfolderBase]: For 237111/237119 co-relation queries the response was YES. [2024-06-28 03:54:41,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40979 conditions, 5982 events. 3830/5982 cut-off events. For 237111/237119 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 34399 event pairs, 1333 based on Foata normal form. 82/6063 useless extension candidates. Maximal degree in co-relation 40898. Up to 5067 conditions per place. [2024-06-28 03:54:42,013 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 235 selfloop transitions, 62 changer transitions 0/301 dead transitions. [2024-06-28 03:54:42,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 301 transitions, 4047 flow [2024-06-28 03:54:42,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:54:42,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:54:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 199 transitions. [2024-06-28 03:54:42,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43073593073593075 [2024-06-28 03:54:42,015 INFO L175 Difference]: Start difference. First operand has 170 places, 239 transitions, 2996 flow. Second operand 11 states and 199 transitions. [2024-06-28 03:54:42,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 301 transitions, 4047 flow [2024-06-28 03:54:42,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 301 transitions, 3866 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-28 03:54:42,291 INFO L231 Difference]: Finished difference. Result has 174 places, 241 transitions, 3033 flow [2024-06-28 03:54:42,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3033, PETRI_PLACES=174, PETRI_TRANSITIONS=241} [2024-06-28 03:54:42,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-28 03:54:42,291 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 241 transitions, 3033 flow [2024-06-28 03:54:42,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:42,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:42,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:42,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-28 03:54:42,292 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:42,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:42,292 INFO L85 PathProgramCache]: Analyzing trace with hash 88945343, now seen corresponding path program 3 times [2024-06-28 03:54:42,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:42,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174358664] [2024-06-28 03:54:42,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:42,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:45,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:45,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174358664] [2024-06-28 03:54:45,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174358664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:45,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:45,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:45,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773137751] [2024-06-28 03:54:45,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:45,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:45,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:45,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:45,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:45,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:45,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 241 transitions, 3033 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:45,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:45,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:45,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:47,974 INFO L124 PetriNetUnfolderBase]: 3950/6198 cut-off events. [2024-06-28 03:54:47,974 INFO L125 PetriNetUnfolderBase]: For 230379/230387 co-relation queries the response was YES. [2024-06-28 03:54:48,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40484 conditions, 6198 events. 3950/6198 cut-off events. For 230379/230387 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 36195 event pairs, 1159 based on Foata normal form. 72/6269 useless extension candidates. Maximal degree in co-relation 40401. Up to 4291 conditions per place. [2024-06-28 03:54:48,022 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 250 selfloop transitions, 60 changer transitions 0/314 dead transitions. [2024-06-28 03:54:48,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 314 transitions, 4299 flow [2024-06-28 03:54:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:54:48,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:54:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-28 03:54:48,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-28 03:54:48,023 INFO L175 Difference]: Start difference. First operand has 174 places, 241 transitions, 3033 flow. Second operand 11 states and 204 transitions. [2024-06-28 03:54:48,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 314 transitions, 4299 flow [2024-06-28 03:54:48,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 314 transitions, 4124 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-28 03:54:48,325 INFO L231 Difference]: Finished difference. Result has 177 places, 246 transitions, 3154 flow [2024-06-28 03:54:48,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2858, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3154, PETRI_PLACES=177, PETRI_TRANSITIONS=246} [2024-06-28 03:54:48,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-28 03:54:48,326 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 246 transitions, 3154 flow [2024-06-28 03:54:48,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:48,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:48,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:48,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-28 03:54:48,326 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:48,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:48,326 INFO L85 PathProgramCache]: Analyzing trace with hash -626485433, now seen corresponding path program 4 times [2024-06-28 03:54:48,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:48,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517491915] [2024-06-28 03:54:48,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:48,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:52,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:52,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517491915] [2024-06-28 03:54:52,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517491915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:52,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:52,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:52,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958084414] [2024-06-28 03:54:52,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:52,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:52,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:52,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:52,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:52,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:52,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 246 transitions, 3154 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:52,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:52,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:52,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:54:54,004 INFO L124 PetriNetUnfolderBase]: 4262/6732 cut-off events. [2024-06-28 03:54:54,004 INFO L125 PetriNetUnfolderBase]: For 254721/254723 co-relation queries the response was YES. [2024-06-28 03:54:54,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43062 conditions, 6732 events. 4262/6732 cut-off events. For 254721/254723 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 40331 event pairs, 1490 based on Foata normal form. 76/6807 useless extension candidates. Maximal degree in co-relation 42977. Up to 5134 conditions per place. [2024-06-28 03:54:54,064 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 173 selfloop transitions, 134 changer transitions 0/311 dead transitions. [2024-06-28 03:54:54,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 311 transitions, 4251 flow [2024-06-28 03:54:54,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:54:54,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:54:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 212 transitions. [2024-06-28 03:54:54,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588744588744589 [2024-06-28 03:54:54,066 INFO L175 Difference]: Start difference. First operand has 177 places, 246 transitions, 3154 flow. Second operand 11 states and 212 transitions. [2024-06-28 03:54:54,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 311 transitions, 4251 flow [2024-06-28 03:54:54,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 311 transitions, 4098 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-28 03:54:54,454 INFO L231 Difference]: Finished difference. Result has 181 places, 248 transitions, 3366 flow [2024-06-28 03:54:54,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3001, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3366, PETRI_PLACES=181, PETRI_TRANSITIONS=248} [2024-06-28 03:54:54,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-28 03:54:54,454 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 248 transitions, 3366 flow [2024-06-28 03:54:54,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:54,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:54:54,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:54:54,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-28 03:54:54,455 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:54:54,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:54:54,456 INFO L85 PathProgramCache]: Analyzing trace with hash -631847813, now seen corresponding path program 5 times [2024-06-28 03:54:54,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:54:54,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919777402] [2024-06-28 03:54:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:54:54,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:54:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:54:57,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:54:57,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:54:57,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919777402] [2024-06-28 03:54:57,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919777402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:54:57,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:54:57,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:54:57,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093668514] [2024-06-28 03:54:57,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:54:57,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:54:57,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:54:57,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:54:57,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:54:57,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:54:57,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 248 transitions, 3366 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:54:57,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:54:57,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:54:57,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:00,199 INFO L124 PetriNetUnfolderBase]: 4574/7256 cut-off events. [2024-06-28 03:55:00,199 INFO L125 PetriNetUnfolderBase]: For 275315/275317 co-relation queries the response was YES. [2024-06-28 03:55:00,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46131 conditions, 7256 events. 4574/7256 cut-off events. For 275315/275317 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 44496 event pairs, 1686 based on Foata normal form. 76/7331 useless extension candidates. Maximal degree in co-relation 46044. Up to 5658 conditions per place. [2024-06-28 03:55:00,259 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 188 selfloop transitions, 130 changer transitions 0/322 dead transitions. [2024-06-28 03:55:00,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 322 transitions, 4521 flow [2024-06-28 03:55:00,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:55:00,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:55:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-28 03:55:00,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-28 03:55:00,262 INFO L175 Difference]: Start difference. First operand has 181 places, 248 transitions, 3366 flow. Second operand 12 states and 234 transitions. [2024-06-28 03:55:00,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 322 transitions, 4521 flow [2024-06-28 03:55:00,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 322 transitions, 4184 flow, removed 38 selfloop flow, removed 9 redundant places. [2024-06-28 03:55:00,613 INFO L231 Difference]: Finished difference. Result has 184 places, 250 transitions, 3390 flow [2024-06-28 03:55:00,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3390, PETRI_PLACES=184, PETRI_TRANSITIONS=250} [2024-06-28 03:55:00,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-28 03:55:00,614 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 250 transitions, 3390 flow [2024-06-28 03:55:00,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:55:00,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:00,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:00,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-28 03:55:00,614 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:00,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:00,614 INFO L85 PathProgramCache]: Analyzing trace with hash -631995683, now seen corresponding path program 6 times [2024-06-28 03:55:00,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:00,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398055578] [2024-06-28 03:55:00,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:00,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:03,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:03,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398055578] [2024-06-28 03:55:03,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398055578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:03,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:03,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:03,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319805348] [2024-06-28 03:55:03,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:03,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:03,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:03,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:03,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:03,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:03,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 250 transitions, 3390 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:55:03,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:03,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:03,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:06,326 INFO L124 PetriNetUnfolderBase]: 5135/8167 cut-off events. [2024-06-28 03:55:06,326 INFO L125 PetriNetUnfolderBase]: For 317506/317508 co-relation queries the response was YES. [2024-06-28 03:55:06,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51758 conditions, 8167 events. 5135/8167 cut-off events. For 317506/317508 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 51547 event pairs, 1707 based on Foata normal form. 66/8232 useless extension candidates. Maximal degree in co-relation 51670. Up to 5033 conditions per place. [2024-06-28 03:55:06,397 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 198 selfloop transitions, 133 changer transitions 0/335 dead transitions. [2024-06-28 03:55:06,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 335 transitions, 4783 flow [2024-06-28 03:55:06,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 03:55:06,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 03:55:06,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 239 transitions. [2024-06-28 03:55:06,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4742063492063492 [2024-06-28 03:55:06,398 INFO L175 Difference]: Start difference. First operand has 184 places, 250 transitions, 3390 flow. Second operand 12 states and 239 transitions. [2024-06-28 03:55:06,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 335 transitions, 4783 flow [2024-06-28 03:55:06,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 335 transitions, 4458 flow, removed 36 selfloop flow, removed 10 redundant places. [2024-06-28 03:55:06,819 INFO L231 Difference]: Finished difference. Result has 187 places, 255 transitions, 3536 flow [2024-06-28 03:55:06,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3065, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3536, PETRI_PLACES=187, PETRI_TRANSITIONS=255} [2024-06-28 03:55:06,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-28 03:55:06,820 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 255 transitions, 3536 flow [2024-06-28 03:55:06,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:55:06,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:06,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:06,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-28 03:55:06,820 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:06,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:06,821 INFO L85 PathProgramCache]: Analyzing trace with hash -626270231, now seen corresponding path program 1 times [2024-06-28 03:55:06,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:06,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233468541] [2024-06-28 03:55:06,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:06,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:06,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:10,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:10,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:10,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233468541] [2024-06-28 03:55:10,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233468541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:10,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:10,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:55:10,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950303357] [2024-06-28 03:55:10,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:10,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:55:10,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:10,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:55:10,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:55:10,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:10,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 255 transitions, 3536 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:10,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:10,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:10,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:13,006 INFO L124 PetriNetUnfolderBase]: 5638/9028 cut-off events. [2024-06-28 03:55:13,006 INFO L125 PetriNetUnfolderBase]: For 370577/370579 co-relation queries the response was YES. [2024-06-28 03:55:13,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57746 conditions, 9028 events. 5638/9028 cut-off events. For 370577/370579 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 58824 event pairs, 1933 based on Foata normal form. 56/9083 useless extension candidates. Maximal degree in co-relation 57656. Up to 5374 conditions per place. [2024-06-28 03:55:13,084 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 181 selfloop transitions, 143 changer transitions 0/328 dead transitions. [2024-06-28 03:55:13,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 328 transitions, 4865 flow [2024-06-28 03:55:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:55:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:55:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-28 03:55:13,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-28 03:55:13,085 INFO L175 Difference]: Start difference. First operand has 187 places, 255 transitions, 3536 flow. Second operand 11 states and 217 transitions. [2024-06-28 03:55:13,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 328 transitions, 4865 flow [2024-06-28 03:55:13,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 328 transitions, 4542 flow, removed 57 selfloop flow, removed 9 redundant places. [2024-06-28 03:55:13,547 INFO L231 Difference]: Finished difference. Result has 189 places, 258 transitions, 3659 flow [2024-06-28 03:55:13,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3215, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3659, PETRI_PLACES=189, PETRI_TRANSITIONS=258} [2024-06-28 03:55:13,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-28 03:55:13,547 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 258 transitions, 3659 flow [2024-06-28 03:55:13,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:13,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:13,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:13,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-28 03:55:13,548 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:13,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:13,548 INFO L85 PathProgramCache]: Analyzing trace with hash -80244311, now seen corresponding path program 7 times [2024-06-28 03:55:13,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:13,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665616134] [2024-06-28 03:55:13,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:13,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:16,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:16,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:16,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665616134] [2024-06-28 03:55:16,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665616134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:16,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:16,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:16,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133207714] [2024-06-28 03:55:16,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:16,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:16,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:16,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:16,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 258 transitions, 3659 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:55:16,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:16,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:16,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:19,486 INFO L124 PetriNetUnfolderBase]: 5950/9550 cut-off events. [2024-06-28 03:55:19,487 INFO L125 PetriNetUnfolderBase]: For 407542/407552 co-relation queries the response was YES. [2024-06-28 03:55:19,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60576 conditions, 9550 events. 5950/9550 cut-off events. For 407542/407552 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 63428 event pairs, 2603 based on Foata normal form. 77/9626 useless extension candidates. Maximal degree in co-relation 60485. Up to 8371 conditions per place. [2024-06-28 03:55:19,570 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 218 selfloop transitions, 89 changer transitions 0/311 dead transitions. [2024-06-28 03:55:19,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 311 transitions, 4616 flow [2024-06-28 03:55:19,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:55:19,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:55:19,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-28 03:55:19,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 03:55:19,572 INFO L175 Difference]: Start difference. First operand has 189 places, 258 transitions, 3659 flow. Second operand 10 states and 185 transitions. [2024-06-28 03:55:19,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 311 transitions, 4616 flow [2024-06-28 03:55:20,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 311 transitions, 4241 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-28 03:55:20,191 INFO L231 Difference]: Finished difference. Result has 190 places, 260 transitions, 3573 flow [2024-06-28 03:55:20,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3288, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3573, PETRI_PLACES=190, PETRI_TRANSITIONS=260} [2024-06-28 03:55:20,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-28 03:55:20,192 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 260 transitions, 3573 flow [2024-06-28 03:55:20,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:55:20,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:20,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:20,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-28 03:55:20,193 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:20,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:20,193 INFO L85 PathProgramCache]: Analyzing trace with hash 553788457, now seen corresponding path program 8 times [2024-06-28 03:55:20,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:20,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771334775] [2024-06-28 03:55:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:20,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:23,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:23,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:23,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771334775] [2024-06-28 03:55:23,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771334775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:23,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:23,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:23,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033591056] [2024-06-28 03:55:23,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:23,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:23,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:23,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:23,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:23,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:23,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 260 transitions, 3573 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:55:23,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:23,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:23,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:26,025 INFO L124 PetriNetUnfolderBase]: 6038/9710 cut-off events. [2024-06-28 03:55:26,025 INFO L125 PetriNetUnfolderBase]: For 379922/379932 co-relation queries the response was YES. [2024-06-28 03:55:26,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61011 conditions, 9710 events. 6038/9710 cut-off events. For 379922/379932 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 64671 event pairs, 2620 based on Foata normal form. 23/9732 useless extension candidates. Maximal degree in co-relation 60920. Up to 8971 conditions per place. [2024-06-28 03:55:26,101 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 239 selfloop transitions, 59 changer transitions 0/302 dead transitions. [2024-06-28 03:55:26,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 302 transitions, 4341 flow [2024-06-28 03:55:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:26,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 03:55:26,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 03:55:26,102 INFO L175 Difference]: Start difference. First operand has 190 places, 260 transitions, 3573 flow. Second operand 9 states and 157 transitions. [2024-06-28 03:55:26,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 302 transitions, 4341 flow [2024-06-28 03:55:26,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 302 transitions, 4092 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-28 03:55:26,620 INFO L231 Difference]: Finished difference. Result has 191 places, 261 transitions, 3493 flow [2024-06-28 03:55:26,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3324, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3493, PETRI_PLACES=191, PETRI_TRANSITIONS=261} [2024-06-28 03:55:26,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-28 03:55:26,621 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 261 transitions, 3493 flow [2024-06-28 03:55:26,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:55:26,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:26,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:26,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-28 03:55:26,622 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:26,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:26,622 INFO L85 PathProgramCache]: Analyzing trace with hash 2073425019, now seen corresponding path program 9 times [2024-06-28 03:55:26,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:26,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383092464] [2024-06-28 03:55:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:26,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:26,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:29,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:29,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383092464] [2024-06-28 03:55:29,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383092464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:29,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:29,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:29,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963511548] [2024-06-28 03:55:29,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:29,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:29,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:29,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:29,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:30,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:30,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 261 transitions, 3493 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:55:30,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:30,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:30,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:33,019 INFO L124 PetriNetUnfolderBase]: 6350/10234 cut-off events. [2024-06-28 03:55:33,019 INFO L125 PetriNetUnfolderBase]: For 439756/439766 co-relation queries the response was YES. [2024-06-28 03:55:33,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63296 conditions, 10234 events. 6350/10234 cut-off events. For 439756/439766 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 69160 event pairs, 2784 based on Foata normal form. 77/10310 useless extension candidates. Maximal degree in co-relation 63204. Up to 9043 conditions per place. [2024-06-28 03:55:33,112 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 231 selfloop transitions, 89 changer transitions 0/324 dead transitions. [2024-06-28 03:55:33,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 324 transitions, 4592 flow [2024-06-28 03:55:33,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:55:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:55:33,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-28 03:55:33,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-28 03:55:33,114 INFO L175 Difference]: Start difference. First operand has 191 places, 261 transitions, 3493 flow. Second operand 11 states and 206 transitions. [2024-06-28 03:55:33,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 324 transitions, 4592 flow [2024-06-28 03:55:33,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 324 transitions, 4435 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-28 03:55:33,629 INFO L231 Difference]: Finished difference. Result has 195 places, 263 transitions, 3631 flow [2024-06-28 03:55:33,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3340, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3631, PETRI_PLACES=195, PETRI_TRANSITIONS=263} [2024-06-28 03:55:33,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-28 03:55:33,630 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 263 transitions, 3631 flow [2024-06-28 03:55:33,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:55:33,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:33,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:33,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-28 03:55:33,631 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:33,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:33,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2073277149, now seen corresponding path program 10 times [2024-06-28 03:55:33,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:33,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222303745] [2024-06-28 03:55:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:33,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:36,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:36,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222303745] [2024-06-28 03:55:36,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222303745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:36,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:36,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:36,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682179795] [2024-06-28 03:55:36,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:36,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:36,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:36,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:36,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:36,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:36,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 263 transitions, 3631 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:55:36,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:36,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:36,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:39,449 INFO L124 PetriNetUnfolderBase]: 6855/11057 cut-off events. [2024-06-28 03:55:39,449 INFO L125 PetriNetUnfolderBase]: For 493893/493903 co-relation queries the response was YES. [2024-06-28 03:55:39,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68993 conditions, 11057 events. 6855/11057 cut-off events. For 493893/493903 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 76022 event pairs, 2809 based on Foata normal form. 67/11123 useless extension candidates. Maximal degree in co-relation 68900. Up to 8330 conditions per place. [2024-06-28 03:55:39,557 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 241 selfloop transitions, 92 changer transitions 0/337 dead transitions. [2024-06-28 03:55:39,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 337 transitions, 4984 flow [2024-06-28 03:55:39,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 03:55:39,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 03:55:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-28 03:55:39,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45670995670995673 [2024-06-28 03:55:39,559 INFO L175 Difference]: Start difference. First operand has 195 places, 263 transitions, 3631 flow. Second operand 11 states and 211 transitions. [2024-06-28 03:55:39,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 337 transitions, 4984 flow [2024-06-28 03:55:40,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 337 transitions, 4729 flow, removed 42 selfloop flow, removed 9 redundant places. [2024-06-28 03:55:40,305 INFO L231 Difference]: Finished difference. Result has 198 places, 268 transitions, 3787 flow [2024-06-28 03:55:40,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3787, PETRI_PLACES=198, PETRI_TRANSITIONS=268} [2024-06-28 03:55:40,307 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-28 03:55:40,307 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 268 transitions, 3787 flow [2024-06-28 03:55:40,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 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) [2024-06-28 03:55:40,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:40,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:40,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-28 03:55:40,307 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:40,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:40,308 INFO L85 PathProgramCache]: Analyzing trace with hash -599772185, now seen corresponding path program 2 times [2024-06-28 03:55:40,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:40,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632566055] [2024-06-28 03:55:40,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:40,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:44,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632566055] [2024-06-28 03:55:44,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632566055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:44,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:44,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:55:44,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926231128] [2024-06-28 03:55:44,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:44,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:55:44,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:44,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:55:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:55:44,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:44,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 268 transitions, 3787 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:44,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:44,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:44,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:46,859 INFO L124 PetriNetUnfolderBase]: 7067/11477 cut-off events. [2024-06-28 03:55:46,860 INFO L125 PetriNetUnfolderBase]: For 504840/504850 co-relation queries the response was YES. [2024-06-28 03:55:46,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70877 conditions, 11477 events. 7067/11477 cut-off events. For 504840/504850 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 80192 event pairs, 3044 based on Foata normal form. 57/11533 useless extension candidates. Maximal degree in co-relation 70782. Up to 9206 conditions per place. [2024-06-28 03:55:46,971 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 228 selfloop transitions, 95 changer transitions 0/327 dead transitions. [2024-06-28 03:55:46,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 327 transitions, 4834 flow [2024-06-28 03:55:46,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:55:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:55:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-28 03:55:46,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-28 03:55:46,973 INFO L175 Difference]: Start difference. First operand has 198 places, 268 transitions, 3787 flow. Second operand 10 states and 189 transitions. [2024-06-28 03:55:46,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 327 transitions, 4834 flow [2024-06-28 03:55:47,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 327 transitions, 4599 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-28 03:55:47,722 INFO L231 Difference]: Finished difference. Result has 201 places, 270 transitions, 3860 flow [2024-06-28 03:55:47,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3552, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3860, PETRI_PLACES=201, PETRI_TRANSITIONS=270} [2024-06-28 03:55:47,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-28 03:55:47,723 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 270 transitions, 3860 flow [2024-06-28 03:55:47,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:47,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:47,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:47,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-28 03:55:47,724 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:47,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:47,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1868270617, now seen corresponding path program 3 times [2024-06-28 03:55:47,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:47,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252072720] [2024-06-28 03:55:47,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:47,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:47,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:51,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:51,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252072720] [2024-06-28 03:55:51,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252072720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:51,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:51,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 03:55:51,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263059681] [2024-06-28 03:55:51,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:51,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 03:55:51,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:51,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 03:55:51,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-28 03:55:51,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:51,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 270 transitions, 3860 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:51,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:51,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:51,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:55:54,612 INFO L124 PetriNetUnfolderBase]: 7115/11573 cut-off events. [2024-06-28 03:55:54,612 INFO L125 PetriNetUnfolderBase]: For 486705/486715 co-relation queries the response was YES. [2024-06-28 03:55:54,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71411 conditions, 11573 events. 7115/11573 cut-off events. For 486705/486715 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 80984 event pairs, 3268 based on Foata normal form. 15/11587 useless extension candidates. Maximal degree in co-relation 71314. Up to 10664 conditions per place. [2024-06-28 03:55:54,742 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 249 selfloop transitions, 61 changer transitions 0/314 dead transitions. [2024-06-28 03:55:54,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 314 transitions, 4676 flow [2024-06-28 03:55:54,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:55:54,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:55:54,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-28 03:55:54,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:55:54,744 INFO L175 Difference]: Start difference. First operand has 201 places, 270 transitions, 3860 flow. Second operand 9 states and 159 transitions. [2024-06-28 03:55:54,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 314 transitions, 4676 flow [2024-06-28 03:55:55,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 314 transitions, 4394 flow, removed 48 selfloop flow, removed 8 redundant places. [2024-06-28 03:55:55,829 INFO L231 Difference]: Finished difference. Result has 202 places, 271 transitions, 3758 flow [2024-06-28 03:55:55,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3578, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3758, PETRI_PLACES=202, PETRI_TRANSITIONS=271} [2024-06-28 03:55:55,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-28 03:55:55,830 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 271 transitions, 3758 flow [2024-06-28 03:55:55,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:55,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:55:55,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:55:55,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-28 03:55:55,831 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:55:55,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:55:55,831 INFO L85 PathProgramCache]: Analyzing trace with hash 618223791, now seen corresponding path program 4 times [2024-06-28 03:55:55,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:55:55,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021410221] [2024-06-28 03:55:55,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:55:55,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:55:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:55:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:55:59,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:55:59,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021410221] [2024-06-28 03:55:59,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021410221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:55:59,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:55:59,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:55:59,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547304608] [2024-06-28 03:55:59,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:55:59,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:55:59,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:55:59,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:55:59,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:55:59,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:55:59,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 271 transitions, 3758 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:55:59,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:55:59,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:55:59,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:02,124 INFO L124 PetriNetUnfolderBase]: 7095/11541 cut-off events. [2024-06-28 03:56:02,124 INFO L125 PetriNetUnfolderBase]: For 490025/490035 co-relation queries the response was YES. [2024-06-28 03:56:02,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70464 conditions, 11541 events. 7095/11541 cut-off events. For 490025/490035 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 80304 event pairs, 3213 based on Foata normal form. 15/11555 useless extension candidates. Maximal degree in co-relation 70366. Up to 9556 conditions per place. [2024-06-28 03:56:02,226 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 236 selfloop transitions, 73 changer transitions 0/313 dead transitions. [2024-06-28 03:56:02,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 313 transitions, 4436 flow [2024-06-28 03:56:02,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:56:02,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:56:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-28 03:56:02,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-28 03:56:02,227 INFO L175 Difference]: Start difference. First operand has 202 places, 271 transitions, 3758 flow. Second operand 9 states and 157 transitions. [2024-06-28 03:56:02,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 313 transitions, 4436 flow [2024-06-28 03:56:02,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 313 transitions, 4270 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-28 03:56:02,982 INFO L231 Difference]: Finished difference. Result has 203 places, 270 transitions, 3656 flow [2024-06-28 03:56:02,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3506, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3656, PETRI_PLACES=203, PETRI_TRANSITIONS=270} [2024-06-28 03:56:02,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-28 03:56:02,983 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 270 transitions, 3656 flow [2024-06-28 03:56:02,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:02,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:02,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:02,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-28 03:56:02,983 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)] === [2024-06-28 03:56:02,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:02,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1593649829, now seen corresponding path program 1 times [2024-06-28 03:56:02,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:02,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270413947] [2024-06-28 03:56:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:02,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:06,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:06,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270413947] [2024-06-28 03:56:06,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270413947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:06,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:06,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:56:06,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297889340] [2024-06-28 03:56:06,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:06,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:56:06,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:06,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:56:06,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:56:06,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:56:06,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 270 transitions, 3656 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:06,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:06,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:56:06,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:08,625 INFO L124 PetriNetUnfolderBase]: 6789/11060 cut-off events. [2024-06-28 03:56:08,625 INFO L125 PetriNetUnfolderBase]: For 498624/498678 co-relation queries the response was YES. [2024-06-28 03:56:08,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69209 conditions, 11060 events. 6789/11060 cut-off events. For 498624/498678 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 78026 event pairs, 3224 based on Foata normal form. 20/10944 useless extension candidates. Maximal degree in co-relation 69110. Up to 10627 conditions per place. [2024-06-28 03:56:08,746 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 40 changer transitions 0/299 dead transitions. [2024-06-28 03:56:08,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 299 transitions, 4390 flow [2024-06-28 03:56:08,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:56:08,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:56:08,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-28 03:56:08,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-28 03:56:08,748 INFO L175 Difference]: Start difference. First operand has 203 places, 270 transitions, 3656 flow. Second operand 7 states and 118 transitions. [2024-06-28 03:56:08,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 299 transitions, 4390 flow [2024-06-28 03:56:09,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 299 transitions, 4040 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-28 03:56:09,555 INFO L231 Difference]: Finished difference. Result has 200 places, 280 transitions, 3550 flow [2024-06-28 03:56:09,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3316, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3550, PETRI_PLACES=200, PETRI_TRANSITIONS=280} [2024-06-28 03:56:09,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-28 03:56:09,556 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 280 transitions, 3550 flow [2024-06-28 03:56:09,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:09,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:09,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:09,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-28 03:56:09,556 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)] === [2024-06-28 03:56:09,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:09,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1886907325, now seen corresponding path program 2 times [2024-06-28 03:56:09,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:09,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653767748] [2024-06-28 03:56:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:09,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:12,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:12,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653767748] [2024-06-28 03:56:12,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653767748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:12,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:12,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:56:12,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002082140] [2024-06-28 03:56:12,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:12,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:56:12,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:12,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:56:12,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:56:12,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:56:12,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 280 transitions, 3550 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:12,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:12,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:56:12,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:14,716 INFO L124 PetriNetUnfolderBase]: 6775/11026 cut-off events. [2024-06-28 03:56:14,716 INFO L125 PetriNetUnfolderBase]: For 509440/509502 co-relation queries the response was YES. [2024-06-28 03:56:14,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67676 conditions, 11026 events. 6775/11026 cut-off events. For 509440/509502 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 77692 event pairs, 3168 based on Foata normal form. 19/10896 useless extension candidates. Maximal degree in co-relation 67580. Up to 10581 conditions per place. [2024-06-28 03:56:14,831 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 221 selfloop transitions, 47 changer transitions 0/296 dead transitions. [2024-06-28 03:56:14,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 296 transitions, 4246 flow [2024-06-28 03:56:14,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:56:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:56:14,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-28 03:56:14,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-28 03:56:14,833 INFO L175 Difference]: Start difference. First operand has 200 places, 280 transitions, 3550 flow. Second operand 6 states and 101 transitions. [2024-06-28 03:56:14,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 296 transitions, 4246 flow [2024-06-28 03:56:15,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 296 transitions, 4176 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 03:56:15,469 INFO L231 Difference]: Finished difference. Result has 203 places, 283 transitions, 3624 flow [2024-06-28 03:56:15,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3480, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3624, PETRI_PLACES=203, PETRI_TRANSITIONS=283} [2024-06-28 03:56:15,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-28 03:56:15,470 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 283 transitions, 3624 flow [2024-06-28 03:56:15,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:15,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:15,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:15,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-28 03:56:15,470 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)] === [2024-06-28 03:56:15,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:15,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1886491615, now seen corresponding path program 3 times [2024-06-28 03:56:15,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:15,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324554151] [2024-06-28 03:56:15,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:15,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:18,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:18,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:18,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324554151] [2024-06-28 03:56:18,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324554151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:18,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:18,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:56:18,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701799290] [2024-06-28 03:56:18,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:18,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:56:18,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:18,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:56:18,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:56:18,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:56:18,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 283 transitions, 3624 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:18,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:18,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:56:18,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:20,949 INFO L124 PetriNetUnfolderBase]: 6766/11029 cut-off events. [2024-06-28 03:56:20,949 INFO L125 PetriNetUnfolderBase]: For 529359/529408 co-relation queries the response was YES. [2024-06-28 03:56:21,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69287 conditions, 11029 events. 6766/11029 cut-off events. For 529359/529408 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 77852 event pairs, 3221 based on Foata normal form. 15/10908 useless extension candidates. Maximal degree in co-relation 69190. Up to 10587 conditions per place. [2024-06-28 03:56:21,063 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 230 selfloop transitions, 43 changer transitions 0/301 dead transitions. [2024-06-28 03:56:21,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 301 transitions, 4218 flow [2024-06-28 03:56:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:56:21,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:56:21,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-28 03:56:21,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-28 03:56:21,064 INFO L175 Difference]: Start difference. First operand has 203 places, 283 transitions, 3624 flow. Second operand 6 states and 106 transitions. [2024-06-28 03:56:21,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 301 transitions, 4218 flow [2024-06-28 03:56:22,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 301 transitions, 4080 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-28 03:56:22,021 INFO L231 Difference]: Finished difference. Result has 205 places, 283 transitions, 3591 flow [2024-06-28 03:56:22,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3486, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3591, PETRI_PLACES=205, PETRI_TRANSITIONS=283} [2024-06-28 03:56:22,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-28 03:56:22,021 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 283 transitions, 3591 flow [2024-06-28 03:56:22,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:22,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:22,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:22,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-28 03:56:22,022 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)] === [2024-06-28 03:56:22,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:22,022 INFO L85 PathProgramCache]: Analyzing trace with hash 864778145, now seen corresponding path program 1 times [2024-06-28 03:56:22,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:22,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586539390] [2024-06-28 03:56:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:22,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:24,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:24,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586539390] [2024-06-28 03:56:24,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586539390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:24,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:24,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:56:24,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843195621] [2024-06-28 03:56:24,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:24,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:56:24,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:24,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:56:24,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:56:24,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:56:24,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 283 transitions, 3591 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:24,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:24,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:56:24,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:27,079 INFO L124 PetriNetUnfolderBase]: 7143/11614 cut-off events. [2024-06-28 03:56:27,079 INFO L125 PetriNetUnfolderBase]: For 553005/553005 co-relation queries the response was YES. [2024-06-28 03:56:27,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72116 conditions, 11614 events. 7143/11614 cut-off events. For 553005/553005 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81350 event pairs, 3335 based on Foata normal form. 2/11615 useless extension candidates. Maximal degree in co-relation 72018. Up to 11225 conditions per place. [2024-06-28 03:56:27,182 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 290 selfloop transitions, 27 changer transitions 0/321 dead transitions. [2024-06-28 03:56:27,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 321 transitions, 4727 flow [2024-06-28 03:56:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:56:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:56:27,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-28 03:56:27,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-28 03:56:27,184 INFO L175 Difference]: Start difference. First operand has 205 places, 283 transitions, 3591 flow. Second operand 7 states and 124 transitions. [2024-06-28 03:56:27,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 321 transitions, 4727 flow [2024-06-28 03:56:27,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 321 transitions, 4635 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-28 03:56:27,973 INFO L231 Difference]: Finished difference. Result has 208 places, 294 transitions, 3832 flow [2024-06-28 03:56:27,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3832, PETRI_PLACES=208, PETRI_TRANSITIONS=294} [2024-06-28 03:56:27,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-28 03:56:27,974 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 294 transitions, 3832 flow [2024-06-28 03:56:27,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:27,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:27,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:27,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-28 03:56:27,974 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)] === [2024-06-28 03:56:27,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:27,974 INFO L85 PathProgramCache]: Analyzing trace with hash 854237767, now seen corresponding path program 2 times [2024-06-28 03:56:27,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:27,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594927054] [2024-06-28 03:56:27,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:27,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:30,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:30,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:30,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594927054] [2024-06-28 03:56:30,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594927054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:30,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:30,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:56:30,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989217199] [2024-06-28 03:56:30,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:30,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:56:30,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:30,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:56:30,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:56:30,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:56:30,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 294 transitions, 3832 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:30,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:30,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:56:30,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:33,016 INFO L124 PetriNetUnfolderBase]: 7234/11741 cut-off events. [2024-06-28 03:56:33,016 INFO L125 PetriNetUnfolderBase]: For 573133/573133 co-relation queries the response was YES. [2024-06-28 03:56:33,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74785 conditions, 11741 events. 7234/11741 cut-off events. For 573133/573133 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 82292 event pairs, 3388 based on Foata normal form. 6/11746 useless extension candidates. Maximal degree in co-relation 74685. Up to 11404 conditions per place. [2024-06-28 03:56:33,114 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 298 selfloop transitions, 24 changer transitions 0/326 dead transitions. [2024-06-28 03:56:33,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 326 transitions, 4839 flow [2024-06-28 03:56:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:56:33,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:56:33,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-28 03:56:33,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-28 03:56:33,115 INFO L175 Difference]: Start difference. First operand has 208 places, 294 transitions, 3832 flow. Second operand 8 states and 125 transitions. [2024-06-28 03:56:33,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 326 transitions, 4839 flow [2024-06-28 03:56:34,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 326 transitions, 4683 flow, removed 73 selfloop flow, removed 2 redundant places. [2024-06-28 03:56:34,067 INFO L231 Difference]: Finished difference. Result has 215 places, 305 transitions, 3971 flow [2024-06-28 03:56:34,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3710, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3971, PETRI_PLACES=215, PETRI_TRANSITIONS=305} [2024-06-28 03:56:34,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-28 03:56:34,068 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 305 transitions, 3971 flow [2024-06-28 03:56:34,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:34,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:34,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:34,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-28 03:56:34,068 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)] === [2024-06-28 03:56:34,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:34,068 INFO L85 PathProgramCache]: Analyzing trace with hash 864898301, now seen corresponding path program 1 times [2024-06-28 03:56:34,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:34,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404494444] [2024-06-28 03:56:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:34,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:36,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:36,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404494444] [2024-06-28 03:56:36,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404494444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:36,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:36,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:56:36,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984276884] [2024-06-28 03:56:36,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:36,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:56:36,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:36,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:56:36,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:56:36,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:56:36,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 305 transitions, 3971 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:36,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:36,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:56:36,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:38,978 INFO L124 PetriNetUnfolderBase]: 7208/11703 cut-off events. [2024-06-28 03:56:38,979 INFO L125 PetriNetUnfolderBase]: For 585741/585741 co-relation queries the response was YES. [2024-06-28 03:56:39,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74628 conditions, 11703 events. 7208/11703 cut-off events. For 585741/585741 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81963 event pairs, 3389 based on Foata normal form. 6/11708 useless extension candidates. Maximal degree in co-relation 74525. Up to 11385 conditions per place. [2024-06-28 03:56:39,130 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 297 selfloop transitions, 24 changer transitions 0/325 dead transitions. [2024-06-28 03:56:39,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 325 transitions, 4663 flow [2024-06-28 03:56:39,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:56:39,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:56:39,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-28 03:56:39,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-28 03:56:39,132 INFO L175 Difference]: Start difference. First operand has 215 places, 305 transitions, 3971 flow. Second operand 8 states and 124 transitions. [2024-06-28 03:56:39,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 325 transitions, 4663 flow [2024-06-28 03:56:40,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 325 transitions, 4513 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-28 03:56:40,358 INFO L231 Difference]: Finished difference. Result has 219 places, 305 transitions, 3877 flow [2024-06-28 03:56:40,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3821, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3877, PETRI_PLACES=219, PETRI_TRANSITIONS=305} [2024-06-28 03:56:40,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-28 03:56:40,359 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 305 transitions, 3877 flow [2024-06-28 03:56:40,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:40,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:40,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:40,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-28 03:56:40,359 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)] === [2024-06-28 03:56:40,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1886675941, now seen corresponding path program 3 times [2024-06-28 03:56:40,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:40,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599688322] [2024-06-28 03:56:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:40,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:42,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:42,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:42,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599688322] [2024-06-28 03:56:42,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599688322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:42,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:42,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:56:42,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864428224] [2024-06-28 03:56:42,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:42,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:56:42,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:42,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:56:42,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:56:42,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:56:42,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 305 transitions, 3877 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:42,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:42,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:56:42,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:45,438 INFO L124 PetriNetUnfolderBase]: 7230/11735 cut-off events. [2024-06-28 03:56:45,438 INFO L125 PetriNetUnfolderBase]: For 603099/603099 co-relation queries the response was YES. [2024-06-28 03:56:45,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74874 conditions, 11735 events. 7230/11735 cut-off events. For 603099/603099 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81944 event pairs, 3338 based on Foata normal form. 6/11740 useless extension candidates. Maximal degree in co-relation 74770. Up to 11324 conditions per place. [2024-06-28 03:56:45,587 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 293 selfloop transitions, 37 changer transitions 0/334 dead transitions. [2024-06-28 03:56:45,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 334 transitions, 4750 flow [2024-06-28 03:56:45,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:56:45,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:56:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-28 03:56:45,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-28 03:56:45,588 INFO L175 Difference]: Start difference. First operand has 219 places, 305 transitions, 3877 flow. Second operand 8 states and 131 transitions. [2024-06-28 03:56:45,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 334 transitions, 4750 flow [2024-06-28 03:56:46,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 334 transitions, 4636 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 03:56:46,749 INFO L231 Difference]: Finished difference. Result has 221 places, 308 transitions, 3923 flow [2024-06-28 03:56:46,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3763, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3923, PETRI_PLACES=221, PETRI_TRANSITIONS=308} [2024-06-28 03:56:46,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-28 03:56:46,750 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 308 transitions, 3923 flow [2024-06-28 03:56:46,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:46,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:46,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:46,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-28 03:56:46,751 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)] === [2024-06-28 03:56:46,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:46,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1728414461, now seen corresponding path program 2 times [2024-06-28 03:56:46,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:46,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209130486] [2024-06-28 03:56:46,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:46,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:49,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:49,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209130486] [2024-06-28 03:56:49,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209130486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:49,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:49,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:56:49,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654269605] [2024-06-28 03:56:49,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:49,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:56:49,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:56:49,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:56:49,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:56:49,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 308 transitions, 3923 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:49,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:49,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:56:49,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:51,879 INFO L124 PetriNetUnfolderBase]: 7228/11733 cut-off events. [2024-06-28 03:56:51,879 INFO L125 PetriNetUnfolderBase]: For 620773/620773 co-relation queries the response was YES. [2024-06-28 03:56:51,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75228 conditions, 11733 events. 7228/11733 cut-off events. For 620773/620773 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81952 event pairs, 3335 based on Foata normal form. 6/11738 useless extension candidates. Maximal degree in co-relation 75122. Up to 11322 conditions per place. [2024-06-28 03:56:52,002 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 39 changer transitions 0/337 dead transitions. [2024-06-28 03:56:52,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 337 transitions, 4818 flow [2024-06-28 03:56:52,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:56:52,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:56:52,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-28 03:56:52,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 03:56:52,003 INFO L175 Difference]: Start difference. First operand has 221 places, 308 transitions, 3923 flow. Second operand 8 states and 132 transitions. [2024-06-28 03:56:52,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 337 transitions, 4818 flow [2024-06-28 03:56:53,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 337 transitions, 4724 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-28 03:56:53,016 INFO L231 Difference]: Finished difference. Result has 223 places, 311 transitions, 3988 flow [2024-06-28 03:56:53,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3842, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3988, PETRI_PLACES=223, PETRI_TRANSITIONS=311} [2024-06-28 03:56:53,017 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-28 03:56:53,017 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 311 transitions, 3988 flow [2024-06-28 03:56:53,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:53,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:53,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:53,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-28 03:56:53,017 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)] === [2024-06-28 03:56:53,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:53,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1886913277, now seen corresponding path program 3 times [2024-06-28 03:56:53,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:53,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267581603] [2024-06-28 03:56:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:53,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:56:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:56:55,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:56:55,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267581603] [2024-06-28 03:56:55,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267581603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:56:55,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:56:55,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-28 03:56:55,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639651888] [2024-06-28 03:56:55,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:56:55,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-28 03:56:55,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:56:55,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-28 03:56:55,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-28 03:56:55,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:56:55,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 311 transitions, 3988 flow. Second operand has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:55,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:56:55,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:56:55,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:56:58,027 INFO L124 PetriNetUnfolderBase]: 7214/11714 cut-off events. [2024-06-28 03:56:58,028 INFO L125 PetriNetUnfolderBase]: For 613296/613298 co-relation queries the response was YES. [2024-06-28 03:56:58,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75003 conditions, 11714 events. 7214/11714 cut-off events. For 613296/613298 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81867 event pairs, 3338 based on Foata normal form. 4/11717 useless extension candidates. Maximal degree in co-relation 74896. Up to 11311 conditions per place. [2024-06-28 03:56:58,134 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 289 selfloop transitions, 38 changer transitions 0/331 dead transitions. [2024-06-28 03:56:58,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 331 transitions, 4692 flow [2024-06-28 03:56:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:56:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:56:58,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-28 03:56:58,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-28 03:56:58,135 INFO L175 Difference]: Start difference. First operand has 223 places, 311 transitions, 3988 flow. Second operand 7 states and 116 transitions. [2024-06-28 03:56:58,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 331 transitions, 4692 flow [2024-06-28 03:56:59,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 331 transitions, 4583 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-28 03:56:59,152 INFO L231 Difference]: Finished difference. Result has 224 places, 311 transitions, 3961 flow [2024-06-28 03:56:59,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3879, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3961, PETRI_PLACES=224, PETRI_TRANSITIONS=311} [2024-06-28 03:56:59,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-28 03:56:59,152 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 311 transitions, 3961 flow [2024-06-28 03:56:59,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.0) internal successors, (72), 8 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:56:59,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:56:59,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:56:59,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-28 03:56:59,153 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)] === [2024-06-28 03:56:59,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:56:59,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1886922205, now seen corresponding path program 1 times [2024-06-28 03:56:59,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:56:59,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596763885] [2024-06-28 03:56:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:56:59,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:56:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:02,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:02,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:02,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596763885] [2024-06-28 03:57:02,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596763885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:02,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:02,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:57:02,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390480825] [2024-06-28 03:57:02,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:02,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:57:02,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:02,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:57:02,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:57:02,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:57:02,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 311 transitions, 3961 flow. Second operand has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:02,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:02,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:57:02,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:04,889 INFO L124 PetriNetUnfolderBase]: 6874/11182 cut-off events. [2024-06-28 03:57:04,889 INFO L125 PetriNetUnfolderBase]: For 610007/610056 co-relation queries the response was YES. [2024-06-28 03:57:04,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72839 conditions, 11182 events. 6874/11182 cut-off events. For 610007/610056 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 78678 event pairs, 3236 based on Foata normal form. 13/11059 useless extension candidates. Maximal degree in co-relation 72732. Up to 10810 conditions per place. [2024-06-28 03:57:04,997 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 285 selfloop transitions, 12 changer transitions 0/325 dead transitions. [2024-06-28 03:57:04,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 325 transitions, 4617 flow [2024-06-28 03:57:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-28 03:57:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-28 03:57:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-28 03:57:04,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38492063492063494 [2024-06-28 03:57:04,999 INFO L175 Difference]: Start difference. First operand has 224 places, 311 transitions, 3961 flow. Second operand 6 states and 97 transitions. [2024-06-28 03:57:04,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 325 transitions, 4617 flow [2024-06-28 03:57:05,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 325 transitions, 4502 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-28 03:57:05,894 INFO L231 Difference]: Finished difference. Result has 223 places, 313 transitions, 3911 flow [2024-06-28 03:57:05,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3846, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3911, PETRI_PLACES=223, PETRI_TRANSITIONS=313} [2024-06-28 03:57:05,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-28 03:57:05,895 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 313 transitions, 3911 flow [2024-06-28 03:57:05,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.88888888888889) internal successors, (89), 9 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:05,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:05,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:57:05,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-28 03:57:05,895 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)] === [2024-06-28 03:57:05,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:05,896 INFO L85 PathProgramCache]: Analyzing trace with hash 707850194, now seen corresponding path program 1 times [2024-06-28 03:57:05,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:05,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542460268] [2024-06-28 03:57:05,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:05,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:05,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:08,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:08,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542460268] [2024-06-28 03:57:08,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542460268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:08,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:08,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:57:08,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755021139] [2024-06-28 03:57:08,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:08,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:57:08,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:08,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:57:08,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:57:08,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:57:08,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 313 transitions, 3911 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:08,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:08,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:57:08,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:11,598 INFO L124 PetriNetUnfolderBase]: 7197/11690 cut-off events. [2024-06-28 03:57:11,598 INFO L125 PetriNetUnfolderBase]: For 626993/626993 co-relation queries the response was YES. [2024-06-28 03:57:11,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74767 conditions, 11690 events. 7197/11690 cut-off events. For 626993/626993 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81563 event pairs, 3332 based on Foata normal form. 4/11693 useless extension candidates. Maximal degree in co-relation 74659. Up to 11264 conditions per place. [2024-06-28 03:57:11,710 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 43 changer transitions 0/341 dead transitions. [2024-06-28 03:57:11,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 341 transitions, 4655 flow [2024-06-28 03:57:11,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:57:11,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:57:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:57:11,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:57:11,711 INFO L175 Difference]: Start difference. First operand has 223 places, 313 transitions, 3911 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:57:11,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 341 transitions, 4655 flow [2024-06-28 03:57:12,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 341 transitions, 4588 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-28 03:57:12,846 INFO L231 Difference]: Finished difference. Result has 227 places, 313 transitions, 3936 flow [2024-06-28 03:57:12,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3844, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3936, PETRI_PLACES=227, PETRI_TRANSITIONS=313} [2024-06-28 03:57:12,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-28 03:57:12,847 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 313 transitions, 3936 flow [2024-06-28 03:57:12,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:12,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:12,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:57:12,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-28 03:57:12,847 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)] === [2024-06-28 03:57:12,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:12,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1804480070, now seen corresponding path program 1 times [2024-06-28 03:57:12,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:12,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533979647] [2024-06-28 03:57:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:12,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:12,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:16,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:16,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:16,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533979647] [2024-06-28 03:57:16,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533979647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:16,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:16,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:57:16,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333088807] [2024-06-28 03:57:16,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:16,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:57:16,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:16,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:57:16,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:57:16,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:57:16,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 313 transitions, 3936 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:16,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:16,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:57:16,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:19,646 INFO L124 PetriNetUnfolderBase]: 7287/11783 cut-off events. [2024-06-28 03:57:19,646 INFO L125 PetriNetUnfolderBase]: For 660459/660467 co-relation queries the response was YES. [2024-06-28 03:57:19,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76721 conditions, 11783 events. 7287/11783 cut-off events. For 660459/660467 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 81963 event pairs, 3329 based on Foata normal form. 10/11792 useless extension candidates. Maximal degree in co-relation 76612. Up to 11204 conditions per place. [2024-06-28 03:57:19,787 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 294 selfloop transitions, 69 changer transitions 0/367 dead transitions. [2024-06-28 03:57:19,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 367 transitions, 5231 flow [2024-06-28 03:57:19,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:57:19,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:57:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-28 03:57:19,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 03:57:19,789 INFO L175 Difference]: Start difference. First operand has 227 places, 313 transitions, 3936 flow. Second operand 10 states and 175 transitions. [2024-06-28 03:57:19,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 367 transitions, 5231 flow [2024-06-28 03:57:20,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 367 transitions, 5091 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 03:57:20,913 INFO L231 Difference]: Finished difference. Result has 229 places, 322 transitions, 4124 flow [2024-06-28 03:57:20,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3796, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4124, PETRI_PLACES=229, PETRI_TRANSITIONS=322} [2024-06-28 03:57:20,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-28 03:57:20,914 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 322 transitions, 4124 flow [2024-06-28 03:57:20,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:20,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:20,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:57:20,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-28 03:57:20,915 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)] === [2024-06-28 03:57:20,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:20,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1804600226, now seen corresponding path program 1 times [2024-06-28 03:57:20,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:20,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411299392] [2024-06-28 03:57:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:20,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:24,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:24,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411299392] [2024-06-28 03:57:24,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411299392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:24,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:24,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:57:24,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065665703] [2024-06-28 03:57:24,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:24,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:57:24,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:24,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:57:24,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:57:24,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:57:24,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 322 transitions, 4124 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:24,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:24,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:57:24,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:27,241 INFO L124 PetriNetUnfolderBase]: 7352/11900 cut-off events. [2024-06-28 03:57:27,241 INFO L125 PetriNetUnfolderBase]: For 696493/696501 co-relation queries the response was YES. [2024-06-28 03:57:27,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79146 conditions, 11900 events. 7352/11900 cut-off events. For 696493/696501 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 83100 event pairs, 3397 based on Foata normal form. 14/11913 useless extension candidates. Maximal degree in co-relation 79037. Up to 11507 conditions per place. [2024-06-28 03:57:27,374 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 46 changer transitions 3/363 dead transitions. [2024-06-28 03:57:27,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 363 transitions, 5075 flow [2024-06-28 03:57:27,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:57:27,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:57:27,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-28 03:57:27,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3862433862433862 [2024-06-28 03:57:27,375 INFO L175 Difference]: Start difference. First operand has 229 places, 322 transitions, 4124 flow. Second operand 9 states and 146 transitions. [2024-06-28 03:57:27,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 363 transitions, 5075 flow [2024-06-28 03:57:28,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 363 transitions, 4917 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-28 03:57:28,766 INFO L231 Difference]: Finished difference. Result has 235 places, 332 transitions, 4225 flow [2024-06-28 03:57:28,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4225, PETRI_PLACES=235, PETRI_TRANSITIONS=332} [2024-06-28 03:57:28,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-28 03:57:28,767 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 332 transitions, 4225 flow [2024-06-28 03:57:28,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:28,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:28,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:57:28,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-28 03:57:28,767 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)] === [2024-06-28 03:57:28,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:28,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1981968896, now seen corresponding path program 2 times [2024-06-28 03:57:28,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:28,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376413479] [2024-06-28 03:57:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:28,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:31,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:31,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376413479] [2024-06-28 03:57:31,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376413479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:31,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:31,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:57:31,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386186585] [2024-06-28 03:57:31,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:31,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:57:31,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:31,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:57:31,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:57:31,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:57:31,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 332 transitions, 4225 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:31,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:31,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:57:31,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:34,836 INFO L124 PetriNetUnfolderBase]: 7520/12122 cut-off events. [2024-06-28 03:57:34,836 INFO L125 PetriNetUnfolderBase]: For 733404/733412 co-relation queries the response was YES. [2024-06-28 03:57:34,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81692 conditions, 12122 events. 7520/12122 cut-off events. For 733404/733412 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 84178 event pairs, 3378 based on Foata normal form. 10/12131 useless extension candidates. Maximal degree in co-relation 81579. Up to 11615 conditions per place. [2024-06-28 03:57:34,959 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 71 changer transitions 1/386 dead transitions. [2024-06-28 03:57:34,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 386 transitions, 5527 flow [2024-06-28 03:57:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:57:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:57:34,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-28 03:57:34,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-28 03:57:34,961 INFO L175 Difference]: Start difference. First operand has 235 places, 332 transitions, 4225 flow. Second operand 9 states and 145 transitions. [2024-06-28 03:57:34,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 386 transitions, 5527 flow [2024-06-28 03:57:36,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 386 transitions, 5420 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 03:57:36,528 INFO L231 Difference]: Finished difference. Result has 241 places, 358 transitions, 4681 flow [2024-06-28 03:57:36,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4681, PETRI_PLACES=241, PETRI_TRANSITIONS=358} [2024-06-28 03:57:36,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-28 03:57:36,529 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 358 transitions, 4681 flow [2024-06-28 03:57:36,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:36,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:36,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:57:36,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-28 03:57:36,529 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)] === [2024-06-28 03:57:36,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:36,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1981731746, now seen corresponding path program 3 times [2024-06-28 03:57:36,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:36,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487877161] [2024-06-28 03:57:36,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:36,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:36,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:40,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:40,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487877161] [2024-06-28 03:57:40,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487877161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:40,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:40,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:57:40,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273141338] [2024-06-28 03:57:40,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:40,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:57:40,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:40,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:57:40,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:57:40,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:57:40,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 358 transitions, 4681 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:40,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:40,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:57:40,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:43,110 INFO L124 PetriNetUnfolderBase]: 7490/12089 cut-off events. [2024-06-28 03:57:43,111 INFO L125 PetriNetUnfolderBase]: For 755435/755443 co-relation queries the response was YES. [2024-06-28 03:57:43,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82027 conditions, 12089 events. 7490/12089 cut-off events. For 755435/755443 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 84029 event pairs, 3402 based on Foata normal form. 14/12102 useless extension candidates. Maximal degree in co-relation 81911. Up to 11596 conditions per place. [2024-06-28 03:57:43,254 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 68 changer transitions 2/387 dead transitions. [2024-06-28 03:57:43,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 387 transitions, 5631 flow [2024-06-28 03:57:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:57:43,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:57:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 159 transitions. [2024-06-28 03:57:43,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37857142857142856 [2024-06-28 03:57:43,255 INFO L175 Difference]: Start difference. First operand has 241 places, 358 transitions, 4681 flow. Second operand 10 states and 159 transitions. [2024-06-28 03:57:43,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 387 transitions, 5631 flow [2024-06-28 03:57:45,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 387 transitions, 5577 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-28 03:57:45,069 INFO L231 Difference]: Finished difference. Result has 248 places, 356 transitions, 4731 flow [2024-06-28 03:57:45,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4731, PETRI_PLACES=248, PETRI_TRANSITIONS=356} [2024-06-28 03:57:45,070 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-28 03:57:45,070 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 356 transitions, 4731 flow [2024-06-28 03:57:45,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:45,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:45,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:57:45,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-28 03:57:45,070 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)] === [2024-06-28 03:57:45,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:45,070 INFO L85 PathProgramCache]: Analyzing trace with hash -87777502, now seen corresponding path program 1 times [2024-06-28 03:57:45,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:45,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076504881] [2024-06-28 03:57:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:45,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:49,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:49,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:49,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076504881] [2024-06-28 03:57:49,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076504881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:49,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:49,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:57:49,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667760051] [2024-06-28 03:57:49,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:49,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:57:49,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:49,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:57:49,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:57:49,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:57:49,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 356 transitions, 4731 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:49,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:49,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:57:49,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:57:52,189 INFO L124 PetriNetUnfolderBase]: 7149/11594 cut-off events. [2024-06-28 03:57:52,189 INFO L125 PetriNetUnfolderBase]: For 798174/798235 co-relation queries the response was YES. [2024-06-28 03:57:52,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80384 conditions, 11594 events. 7149/11594 cut-off events. For 798174/798235 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 81521 event pairs, 3277 based on Foata normal form. 28/11478 useless extension candidates. Maximal degree in co-relation 80267. Up to 11024 conditions per place. [2024-06-28 03:57:52,328 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 298 selfloop transitions, 42 changer transitions 0/383 dead transitions. [2024-06-28 03:57:52,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 383 transitions, 5533 flow [2024-06-28 03:57:52,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:57:52,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:57:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 03:57:52,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 03:57:52,330 INFO L175 Difference]: Start difference. First operand has 248 places, 356 transitions, 4731 flow. Second operand 8 states and 133 transitions. [2024-06-28 03:57:52,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 383 transitions, 5533 flow [2024-06-28 03:57:54,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 383 transitions, 5409 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-28 03:57:54,204 INFO L231 Difference]: Finished difference. Result has 250 places, 358 transitions, 4736 flow [2024-06-28 03:57:54,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4736, PETRI_PLACES=250, PETRI_TRANSITIONS=358} [2024-06-28 03:57:54,204 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-28 03:57:54,205 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 358 transitions, 4736 flow [2024-06-28 03:57:54,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:54,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:57:54,205 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] [2024-06-28 03:57:54,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-28 03:57:54,205 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)] === [2024-06-28 03:57:54,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:57:54,206 INFO L85 PathProgramCache]: Analyzing trace with hash 457080100, now seen corresponding path program 2 times [2024-06-28 03:57:54,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:57:54,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125431146] [2024-06-28 03:57:54,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:57:54,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:57:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:57:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:57:57,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:57:57,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125431146] [2024-06-28 03:57:57,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125431146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:57:57,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:57:57,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:57:57,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139875241] [2024-06-28 03:57:57,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:57:57,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:57:57,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:57:57,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:57:57,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:57:57,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:57:57,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 358 transitions, 4736 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:57:57,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:57:57,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:57:57,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:00,450 INFO L124 PetriNetUnfolderBase]: 7604/12290 cut-off events. [2024-06-28 03:58:00,451 INFO L125 PetriNetUnfolderBase]: For 816171/816183 co-relation queries the response was YES. [2024-06-28 03:58:00,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84613 conditions, 12290 events. 7604/12290 cut-off events. For 816171/816183 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85628 event pairs, 2861 based on Foata normal form. 14/12303 useless extension candidates. Maximal degree in co-relation 84496. Up to 11183 conditions per place. [2024-06-28 03:58:00,600 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 273 selfloop transitions, 137 changer transitions 0/414 dead transitions. [2024-06-28 03:58:00,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 414 transitions, 6460 flow [2024-06-28 03:58:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:58:00,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:58:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-28 03:58:00,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-28 03:58:00,601 INFO L175 Difference]: Start difference. First operand has 250 places, 358 transitions, 4736 flow. Second operand 8 states and 147 transitions. [2024-06-28 03:58:00,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 414 transitions, 6460 flow [2024-06-28 03:58:02,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 414 transitions, 6367 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-28 03:58:02,562 INFO L231 Difference]: Finished difference. Result has 254 places, 378 transitions, 5510 flow [2024-06-28 03:58:02,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4643, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5510, PETRI_PLACES=254, PETRI_TRANSITIONS=378} [2024-06-28 03:58:02,563 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-28 03:58:02,563 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 378 transitions, 5510 flow [2024-06-28 03:58:02,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:02,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:02,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:58:02,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-28 03:58:02,564 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)] === [2024-06-28 03:58:02,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:02,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1883838786, now seen corresponding path program 3 times [2024-06-28 03:58:02,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:02,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259680952] [2024-06-28 03:58:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:02,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:05,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:05,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:05,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259680952] [2024-06-28 03:58:05,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259680952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:05,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:05,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:58:05,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722625302] [2024-06-28 03:58:05,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:05,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:58:05,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:05,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:58:05,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:58:05,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:58:05,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 378 transitions, 5510 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:05,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:05,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:58:05,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:08,739 INFO L124 PetriNetUnfolderBase]: 7598/12252 cut-off events. [2024-06-28 03:58:08,739 INFO L125 PetriNetUnfolderBase]: For 850613/850625 co-relation queries the response was YES. [2024-06-28 03:58:08,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87150 conditions, 12252 events. 7598/12252 cut-off events. For 850613/850625 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85311 event pairs, 3404 based on Foata normal form. 14/12265 useless extension candidates. Maximal degree in co-relation 87030. Up to 11731 conditions per place. [2024-06-28 03:58:08,872 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 335 selfloop transitions, 71 changer transitions 0/410 dead transitions. [2024-06-28 03:58:08,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 410 transitions, 6524 flow [2024-06-28 03:58:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:58:08,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:58:08,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 03:58:08,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-28 03:58:08,873 INFO L175 Difference]: Start difference. First operand has 254 places, 378 transitions, 5510 flow. Second operand 9 states and 149 transitions. [2024-06-28 03:58:08,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 410 transitions, 6524 flow [2024-06-28 03:58:10,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 410 transitions, 6356 flow, removed 83 selfloop flow, removed 1 redundant places. [2024-06-28 03:58:10,549 INFO L231 Difference]: Finished difference. Result has 262 places, 378 transitions, 5490 flow [2024-06-28 03:58:10,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5342, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5490, PETRI_PLACES=262, PETRI_TRANSITIONS=378} [2024-06-28 03:58:10,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-28 03:58:10,550 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 378 transitions, 5490 flow [2024-06-28 03:58:10,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:10,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:10,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:58:10,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-28 03:58:10,550 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)] === [2024-06-28 03:58:10,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:10,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1407875678, now seen corresponding path program 4 times [2024-06-28 03:58:10,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:10,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268835557] [2024-06-28 03:58:10,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:10,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:14,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:14,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268835557] [2024-06-28 03:58:14,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268835557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:14,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:14,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:58:14,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972630812] [2024-06-28 03:58:14,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:14,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:58:14,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:14,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:58:14,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:58:14,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:58:14,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 378 transitions, 5490 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:14,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:14,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:58:14,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:17,635 INFO L124 PetriNetUnfolderBase]: 7572/12225 cut-off events. [2024-06-28 03:58:17,636 INFO L125 PetriNetUnfolderBase]: For 863572/863584 co-relation queries the response was YES. [2024-06-28 03:58:17,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85599 conditions, 12225 events. 7572/12225 cut-off events. For 863572/863584 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85274 event pairs, 3432 based on Foata normal form. 18/12242 useless extension candidates. Maximal degree in co-relation 85476. Up to 11827 conditions per place. [2024-06-28 03:58:17,754 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 344 selfloop transitions, 53 changer transitions 3/404 dead transitions. [2024-06-28 03:58:17,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 404 transitions, 6360 flow [2024-06-28 03:58:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:58:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:58:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-28 03:58:17,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-28 03:58:17,755 INFO L175 Difference]: Start difference. First operand has 262 places, 378 transitions, 5490 flow. Second operand 9 states and 142 transitions. [2024-06-28 03:58:17,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 404 transitions, 6360 flow [2024-06-28 03:58:19,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 404 transitions, 6111 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-28 03:58:19,502 INFO L231 Difference]: Finished difference. Result has 264 places, 376 transitions, 5322 flow [2024-06-28 03:58:19,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5241, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5322, PETRI_PLACES=264, PETRI_TRANSITIONS=376} [2024-06-28 03:58:19,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-28 03:58:19,504 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 376 transitions, 5322 flow [2024-06-28 03:58:19,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:19,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:19,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:58:19,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-28 03:58:19,504 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)] === [2024-06-28 03:58:19,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:19,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2123167776, now seen corresponding path program 4 times [2024-06-28 03:58:19,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:19,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853753259] [2024-06-28 03:58:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:19,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:22,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:22,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853753259] [2024-06-28 03:58:22,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853753259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:22,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:22,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:58:22,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331140139] [2024-06-28 03:58:22,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:22,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:58:22,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:22,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:58:22,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:58:22,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:58:22,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 376 transitions, 5322 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:22,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:22,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:58:22,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:26,029 INFO L124 PetriNetUnfolderBase]: 7558/12225 cut-off events. [2024-06-28 03:58:26,029 INFO L125 PetriNetUnfolderBase]: For 883326/883338 co-relation queries the response was YES. [2024-06-28 03:58:26,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85683 conditions, 12225 events. 7558/12225 cut-off events. For 883326/883338 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 85199 event pairs, 2892 based on Foata normal form. 14/12238 useless extension candidates. Maximal degree in co-relation 85559. Up to 11151 conditions per place. [2024-06-28 03:58:26,163 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 138 changer transitions 0/409 dead transitions. [2024-06-28 03:58:26,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 409 transitions, 6531 flow [2024-06-28 03:58:26,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:58:26,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:58:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-28 03:58:26,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-28 03:58:26,164 INFO L175 Difference]: Start difference. First operand has 264 places, 376 transitions, 5322 flow. Second operand 8 states and 140 transitions. [2024-06-28 03:58:26,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 409 transitions, 6531 flow [2024-06-28 03:58:27,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 409 transitions, 6420 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-28 03:58:27,677 INFO L231 Difference]: Finished difference. Result has 266 places, 379 transitions, 5574 flow [2024-06-28 03:58:27,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5211, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5574, PETRI_PLACES=266, PETRI_TRANSITIONS=379} [2024-06-28 03:58:27,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-28 03:58:27,678 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 379 transitions, 5574 flow [2024-06-28 03:58:27,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:27,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:27,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:58:27,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-28 03:58:27,679 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)] === [2024-06-28 03:58:27,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:27,679 INFO L85 PathProgramCache]: Analyzing trace with hash -2056508350, now seen corresponding path program 5 times [2024-06-28 03:58:27,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:27,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686819206] [2024-06-28 03:58:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:27,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:30,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:30,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686819206] [2024-06-28 03:58:30,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686819206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:30,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:30,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:58:30,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394068561] [2024-06-28 03:58:30,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:30,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:58:30,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:30,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:58:30,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:58:30,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:58:30,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 379 transitions, 5574 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:30,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:30,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:58:30,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:33,956 INFO L124 PetriNetUnfolderBase]: 7759/12480 cut-off events. [2024-06-28 03:58:33,956 INFO L125 PetriNetUnfolderBase]: For 952087/952099 co-relation queries the response was YES. [2024-06-28 03:58:34,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89810 conditions, 12480 events. 7759/12480 cut-off events. For 952087/952099 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 86777 event pairs, 3418 based on Foata normal form. 18/12497 useless extension candidates. Maximal degree in co-relation 89686. Up to 11873 conditions per place. [2024-06-28 03:58:34,097 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 335 selfloop transitions, 89 changer transitions 0/428 dead transitions. [2024-06-28 03:58:34,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 428 transitions, 7182 flow [2024-06-28 03:58:34,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:58:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:58:34,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-28 03:58:34,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-28 03:58:34,098 INFO L175 Difference]: Start difference. First operand has 266 places, 379 transitions, 5574 flow. Second operand 10 states and 154 transitions. [2024-06-28 03:58:34,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 428 transitions, 7182 flow [2024-06-28 03:58:35,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 428 transitions, 6871 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-28 03:58:35,377 INFO L231 Difference]: Finished difference. Result has 273 places, 401 transitions, 5973 flow [2024-06-28 03:58:35,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5291, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5973, PETRI_PLACES=273, PETRI_TRANSITIONS=401} [2024-06-28 03:58:35,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-28 03:58:35,377 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 401 transitions, 5973 flow [2024-06-28 03:58:35,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:35,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:35,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:58:35,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-28 03:58:35,378 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)] === [2024-06-28 03:58:35,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:35,378 INFO L85 PathProgramCache]: Analyzing trace with hash 583562146, now seen corresponding path program 5 times [2024-06-28 03:58:35,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:35,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799509283] [2024-06-28 03:58:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:35,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:38,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:38,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799509283] [2024-06-28 03:58:38,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799509283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:38,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:38,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:58:38,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740777871] [2024-06-28 03:58:38,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:38,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:58:38,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:58:38,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:58:38,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:58:38,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 401 transitions, 5973 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:38,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:38,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:58:38,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:42,236 INFO L124 PetriNetUnfolderBase]: 7733/12452 cut-off events. [2024-06-28 03:58:42,236 INFO L125 PetriNetUnfolderBase]: For 969537/969549 co-relation queries the response was YES. [2024-06-28 03:58:42,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89517 conditions, 12452 events. 7733/12452 cut-off events. For 969537/969549 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 86699 event pairs, 3475 based on Foata normal form. 18/12469 useless extension candidates. Maximal degree in co-relation 89390. Up to 12051 conditions per place. [2024-06-28 03:58:42,389 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 359 selfloop transitions, 58 changer transitions 3/424 dead transitions. [2024-06-28 03:58:42,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 424 transitions, 6884 flow [2024-06-28 03:58:42,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:58:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:58:42,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2024-06-28 03:58:42,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-28 03:58:42,390 INFO L175 Difference]: Start difference. First operand has 273 places, 401 transitions, 5973 flow. Second operand 10 states and 147 transitions. [2024-06-28 03:58:42,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 424 transitions, 6884 flow [2024-06-28 03:58:44,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 424 transitions, 6715 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-28 03:58:44,565 INFO L231 Difference]: Finished difference. Result has 279 places, 399 transitions, 5885 flow [2024-06-28 03:58:44,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5804, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5885, PETRI_PLACES=279, PETRI_TRANSITIONS=399} [2024-06-28 03:58:44,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-28 03:58:44,565 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 399 transitions, 5885 flow [2024-06-28 03:58:44,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:44,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:44,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:58:44,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-28 03:58:44,566 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)] === [2024-06-28 03:58:44,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:44,566 INFO L85 PathProgramCache]: Analyzing trace with hash -2056329604, now seen corresponding path program 6 times [2024-06-28 03:58:44,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:44,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249901193] [2024-06-28 03:58:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:44,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:47,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:47,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249901193] [2024-06-28 03:58:47,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249901193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:47,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:47,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:58:47,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185318759] [2024-06-28 03:58:47,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:47,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:58:47,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:47,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:58:47,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:58:47,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:58:47,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 399 transitions, 5885 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:47,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:47,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:58:47,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:50,844 INFO L124 PetriNetUnfolderBase]: 7723/12440 cut-off events. [2024-06-28 03:58:50,844 INFO L125 PetriNetUnfolderBase]: For 992142/992154 co-relation queries the response was YES. [2024-06-28 03:58:50,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89396 conditions, 12440 events. 7723/12440 cut-off events. For 992142/992154 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 86673 event pairs, 3438 based on Foata normal form. 18/12457 useless extension candidates. Maximal degree in co-relation 89268. Up to 11851 conditions per place. [2024-06-28 03:58:50,995 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 335 selfloop transitions, 90 changer transitions 0/429 dead transitions. [2024-06-28 03:58:50,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 429 transitions, 7127 flow [2024-06-28 03:58:50,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 03:58:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 03:58:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-28 03:58:50,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-28 03:58:50,997 INFO L175 Difference]: Start difference. First operand has 279 places, 399 transitions, 5885 flow. Second operand 10 states and 154 transitions. [2024-06-28 03:58:50,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 429 transitions, 7127 flow [2024-06-28 03:58:52,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 429 transitions, 6996 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-28 03:58:52,287 INFO L231 Difference]: Finished difference. Result has 282 places, 402 transitions, 6002 flow [2024-06-28 03:58:52,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5754, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6002, PETRI_PLACES=282, PETRI_TRANSITIONS=402} [2024-06-28 03:58:52,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-28 03:58:52,287 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 402 transitions, 6002 flow [2024-06-28 03:58:52,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:52,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:58:52,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:58:52,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-28 03:58:52,288 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)] === [2024-06-28 03:58:52,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:58:52,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1122272254, now seen corresponding path program 7 times [2024-06-28 03:58:52,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:58:52,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420752676] [2024-06-28 03:58:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:58:52,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:58:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:58:55,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:58:55,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:58:55,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420752676] [2024-06-28 03:58:55,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420752676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:58:55,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:58:55,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:58:55,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660155759] [2024-06-28 03:58:55,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:58:55,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:58:55,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:58:55,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:58:55,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:58:55,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:58:55,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 402 transitions, 6002 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:58:55,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:58:55,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:58:55,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:58:58,955 INFO L124 PetriNetUnfolderBase]: 7801/12562 cut-off events. [2024-06-28 03:58:58,955 INFO L125 PetriNetUnfolderBase]: For 1033151/1033163 co-relation queries the response was YES. [2024-06-28 03:58:59,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91349 conditions, 12562 events. 7801/12562 cut-off events. For 1033151/1033163 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 87372 event pairs, 2896 based on Foata normal form. 18/12579 useless extension candidates. Maximal degree in co-relation 91220. Up to 11468 conditions per place. [2024-06-28 03:58:59,117 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 284 selfloop transitions, 157 changer transitions 0/445 dead transitions. [2024-06-28 03:58:59,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 445 transitions, 7478 flow [2024-06-28 03:58:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:58:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:58:59,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-28 03:58:59,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-28 03:58:59,118 INFO L175 Difference]: Start difference. First operand has 282 places, 402 transitions, 6002 flow. Second operand 9 states and 152 transitions. [2024-06-28 03:58:59,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 445 transitions, 7478 flow [2024-06-28 03:59:00,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 445 transitions, 7244 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-28 03:59:00,890 INFO L231 Difference]: Finished difference. Result has 284 places, 414 transitions, 6414 flow [2024-06-28 03:59:00,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5768, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6414, PETRI_PLACES=284, PETRI_TRANSITIONS=414} [2024-06-28 03:59:00,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-28 03:59:00,891 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 414 transitions, 6414 flow [2024-06-28 03:59:00,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:00,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:00,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:00,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-28 03:59:00,891 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-28 03:59:00,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:00,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1122278020, now seen corresponding path program 6 times [2024-06-28 03:59:00,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:00,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436061635] [2024-06-28 03:59:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:00,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:03,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:03,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:03,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436061635] [2024-06-28 03:59:03,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436061635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:03,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:03,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:03,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016051249] [2024-06-28 03:59:03,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:03,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:03,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:03,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:03,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:03,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:59:03,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 414 transitions, 6414 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:03,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:03,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:59:03,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:07,014 INFO L124 PetriNetUnfolderBase]: 7783/12538 cut-off events. [2024-06-28 03:59:07,015 INFO L125 PetriNetUnfolderBase]: For 1052999/1053011 co-relation queries the response was YES. [2024-06-28 03:59:07,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91890 conditions, 12538 events. 7783/12538 cut-off events. For 1052999/1053011 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 87182 event pairs, 2889 based on Foata normal form. 18/12555 useless extension candidates. Maximal degree in co-relation 91759. Up to 11457 conditions per place. [2024-06-28 03:59:07,182 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 284 selfloop transitions, 161 changer transitions 0/449 dead transitions. [2024-06-28 03:59:07,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 449 transitions, 7656 flow [2024-06-28 03:59:07,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:59:07,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:59:07,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-28 03:59:07,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-28 03:59:07,183 INFO L175 Difference]: Start difference. First operand has 284 places, 414 transitions, 6414 flow. Second operand 9 states and 156 transitions. [2024-06-28 03:59:07,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 449 transitions, 7656 flow [2024-06-28 03:59:09,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 449 transitions, 7426 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-28 03:59:09,411 INFO L231 Difference]: Finished difference. Result has 288 places, 414 transitions, 6526 flow [2024-06-28 03:59:09,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6188, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6526, PETRI_PLACES=288, PETRI_TRANSITIONS=414} [2024-06-28 03:59:09,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-28 03:59:09,411 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 414 transitions, 6526 flow [2024-06-28 03:59:09,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:09,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:09,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:09,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-28 03:59:09,412 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)] === [2024-06-28 03:59:09,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:09,412 INFO L85 PathProgramCache]: Analyzing trace with hash -242645776, now seen corresponding path program 8 times [2024-06-28 03:59:09,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:09,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85743516] [2024-06-28 03:59:09,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:09,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:12,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:12,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:12,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85743516] [2024-06-28 03:59:12,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85743516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:12,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:12,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:12,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659170014] [2024-06-28 03:59:12,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:12,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:12,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:12,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:12,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:12,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:59:12,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 414 transitions, 6526 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:12,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:12,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:59:12,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:16,167 INFO L124 PetriNetUnfolderBase]: 7649/12260 cut-off events. [2024-06-28 03:59:16,167 INFO L125 PetriNetUnfolderBase]: For 1041294/1041306 co-relation queries the response was YES. [2024-06-28 03:59:16,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90679 conditions, 12260 events. 7649/12260 cut-off events. For 1041294/1041306 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 84556 event pairs, 3365 based on Foata normal form. 18/12277 useless extension candidates. Maximal degree in co-relation 90548. Up to 11805 conditions per place. [2024-06-28 03:59:16,300 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 365 selfloop transitions, 70 changer transitions 4/443 dead transitions. [2024-06-28 03:59:16,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 443 transitions, 7484 flow [2024-06-28 03:59:16,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:59:16,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:59:16,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 03:59:16,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:59:16,301 INFO L175 Difference]: Start difference. First operand has 288 places, 414 transitions, 6526 flow. Second operand 8 states and 136 transitions. [2024-06-28 03:59:16,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 443 transitions, 7484 flow [2024-06-28 03:59:18,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 443 transitions, 7137 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 03:59:18,027 INFO L231 Difference]: Finished difference. Result has 288 places, 411 transitions, 6287 flow [2024-06-28 03:59:18,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6179, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6287, PETRI_PLACES=288, PETRI_TRANSITIONS=411} [2024-06-28 03:59:18,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-28 03:59:18,027 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 411 transitions, 6287 flow [2024-06-28 03:59:18,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:18,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:18,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:18,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-28 03:59:18,028 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)] === [2024-06-28 03:59:18,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:18,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1115070334, now seen corresponding path program 9 times [2024-06-28 03:59:18,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:18,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376760029] [2024-06-28 03:59:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:18,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:18,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:21,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:21,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:21,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376760029] [2024-06-28 03:59:21,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376760029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:21,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:21,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:21,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320708123] [2024-06-28 03:59:21,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:21,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:21,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:21,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:21,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:21,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:59:21,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 411 transitions, 6287 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:21,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:21,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:59:21,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:24,363 INFO L124 PetriNetUnfolderBase]: 7323/11729 cut-off events. [2024-06-28 03:59:24,363 INFO L125 PetriNetUnfolderBase]: For 1027684/1027710 co-relation queries the response was YES. [2024-06-28 03:59:24,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87964 conditions, 11729 events. 7323/11729 cut-off events. For 1027684/1027710 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 79937 event pairs, 2758 based on Foata normal form. 28/11756 useless extension candidates. Maximal degree in co-relation 87832. Up to 10720 conditions per place. [2024-06-28 03:59:24,486 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 284 selfloop transitions, 153 changer transitions 0/441 dead transitions. [2024-06-28 03:59:24,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 441 transitions, 7691 flow [2024-06-28 03:59:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:59:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:59:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-28 03:59:24,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-28 03:59:24,487 INFO L175 Difference]: Start difference. First operand has 288 places, 411 transitions, 6287 flow. Second operand 8 states and 137 transitions. [2024-06-28 03:59:24,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 441 transitions, 7691 flow [2024-06-28 03:59:26,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 441 transitions, 7521 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-28 03:59:26,167 INFO L231 Difference]: Finished difference. Result has 287 places, 414 transitions, 6513 flow [2024-06-28 03:59:26,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6129, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6513, PETRI_PLACES=287, PETRI_TRANSITIONS=414} [2024-06-28 03:59:26,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-28 03:59:26,167 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 414 transitions, 6513 flow [2024-06-28 03:59:26,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:26,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:26,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:26,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-28 03:59:26,168 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)] === [2024-06-28 03:59:26,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash 847518844, now seen corresponding path program 10 times [2024-06-28 03:59:26,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:26,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961773076] [2024-06-28 03:59:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:26,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:29,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:29,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:29,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961773076] [2024-06-28 03:59:29,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961773076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:29,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:29,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:29,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705861304] [2024-06-28 03:59:29,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:29,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:29,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:29,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:29,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:29,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:59:29,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 414 transitions, 6513 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:29,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:29,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:59:29,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:32,051 INFO L124 PetriNetUnfolderBase]: 7317/11727 cut-off events. [2024-06-28 03:59:32,051 INFO L125 PetriNetUnfolderBase]: For 997839/997865 co-relation queries the response was YES. [2024-06-28 03:59:32,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87789 conditions, 11727 events. 7317/11727 cut-off events. For 997839/997865 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 79951 event pairs, 2765 based on Foata normal form. 28/11754 useless extension candidates. Maximal degree in co-relation 87658. Up to 10717 conditions per place. [2024-06-28 03:59:32,197 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 283 selfloop transitions, 153 changer transitions 0/440 dead transitions. [2024-06-28 03:59:32,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 440 transitions, 7835 flow [2024-06-28 03:59:32,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:59:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:59:32,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-28 03:59:32,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-28 03:59:32,199 INFO L175 Difference]: Start difference. First operand has 287 places, 414 transitions, 6513 flow. Second operand 8 states and 135 transitions. [2024-06-28 03:59:32,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 440 transitions, 7835 flow [2024-06-28 03:59:34,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 440 transitions, 7429 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-28 03:59:34,196 INFO L231 Difference]: Finished difference. Result has 289 places, 414 transitions, 6419 flow [2024-06-28 03:59:34,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6107, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6419, PETRI_PLACES=289, PETRI_TRANSITIONS=414} [2024-06-28 03:59:34,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-28 03:59:34,196 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 414 transitions, 6419 flow [2024-06-28 03:59:34,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:34,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:34,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:34,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-28 03:59:34,197 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)] === [2024-06-28 03:59:34,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:34,197 INFO L85 PathProgramCache]: Analyzing trace with hash 442070464, now seen corresponding path program 11 times [2024-06-28 03:59:34,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:34,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68356610] [2024-06-28 03:59:34,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:34,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:37,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:37,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:37,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68356610] [2024-06-28 03:59:37,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68356610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:37,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:37,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:37,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201064118] [2024-06-28 03:59:37,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:37,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:37,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:37,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:37,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:37,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:59:37,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 414 transitions, 6419 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:37,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:37,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:59:37,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:41,182 INFO L124 PetriNetUnfolderBase]: 7299/11664 cut-off events. [2024-06-28 03:59:41,182 INFO L125 PetriNetUnfolderBase]: For 1022862/1022870 co-relation queries the response was YES. [2024-06-28 03:59:41,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87365 conditions, 11664 events. 7299/11664 cut-off events. For 1022862/1022870 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 79452 event pairs, 3143 based on Foata normal form. 14/11677 useless extension candidates. Maximal degree in co-relation 87234. Up to 11102 conditions per place. [2024-06-28 03:59:41,304 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 350 selfloop transitions, 99 changer transitions 1/454 dead transitions. [2024-06-28 03:59:41,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 454 transitions, 7557 flow [2024-06-28 03:59:41,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 03:59:41,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 03:59:41,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-28 03:59:41,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 03:59:41,305 INFO L175 Difference]: Start difference. First operand has 289 places, 414 transitions, 6419 flow. Second operand 9 states and 162 transitions. [2024-06-28 03:59:41,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 454 transitions, 7557 flow [2024-06-28 03:59:42,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 454 transitions, 7050 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-28 03:59:42,727 INFO L231 Difference]: Finished difference. Result has 290 places, 413 transitions, 6101 flow [2024-06-28 03:59:42,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5912, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6101, PETRI_PLACES=290, PETRI_TRANSITIONS=413} [2024-06-28 03:59:42,727 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-28 03:59:42,728 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 413 transitions, 6101 flow [2024-06-28 03:59:42,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:42,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:42,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:42,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-28 03:59:42,728 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)] === [2024-06-28 03:59:42,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:42,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1126688824, now seen corresponding path program 12 times [2024-06-28 03:59:42,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:42,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881467532] [2024-06-28 03:59:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:42,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:46,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:46,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881467532] [2024-06-28 03:59:46,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881467532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:46,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:46,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 03:59:46,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819995166] [2024-06-28 03:59:46,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:46,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 03:59:46,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:46,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 03:59:46,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-28 03:59:46,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 03:59:46,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 413 transitions, 6101 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:46,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:46,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 03:59:46,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:49,882 INFO L124 PetriNetUnfolderBase]: 7173/11423 cut-off events. [2024-06-28 03:59:49,882 INFO L125 PetriNetUnfolderBase]: For 1031727/1031735 co-relation queries the response was YES. [2024-06-28 03:59:49,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85870 conditions, 11423 events. 7173/11423 cut-off events. For 1031727/1031735 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 77280 event pairs, 3042 based on Foata normal form. 10/11432 useless extension candidates. Maximal degree in co-relation 85739. Up to 10887 conditions per place. [2024-06-28 03:59:50,019 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 338 selfloop transitions, 96 changer transitions 4/442 dead transitions. [2024-06-28 03:59:50,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 442 transitions, 7055 flow [2024-06-28 03:59:50,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 03:59:50,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 03:59:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-28 03:59:50,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-28 03:59:50,020 INFO L175 Difference]: Start difference. First operand has 290 places, 413 transitions, 6101 flow. Second operand 8 states and 136 transitions. [2024-06-28 03:59:50,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 442 transitions, 7055 flow [2024-06-28 03:59:52,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 442 transitions, 6874 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-28 03:59:52,171 INFO L231 Difference]: Finished difference. Result has 291 places, 410 transitions, 6074 flow [2024-06-28 03:59:52,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5920, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6074, PETRI_PLACES=291, PETRI_TRANSITIONS=410} [2024-06-28 03:59:52,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-28 03:59:52,172 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 410 transitions, 6074 flow [2024-06-28 03:59:52,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:52,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 03:59:52,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 03:59:52,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-28 03:59:52,172 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)] === [2024-06-28 03:59:52,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 03:59:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash 841813852, now seen corresponding path program 2 times [2024-06-28 03:59:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 03:59:52,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302217720] [2024-06-28 03:59:52,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 03:59:52,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 03:59:52,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 03:59:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 03:59:56,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 03:59:56,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302217720] [2024-06-28 03:59:56,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302217720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 03:59:56,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 03:59:56,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 03:59:56,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178984841] [2024-06-28 03:59:56,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 03:59:56,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 03:59:56,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 03:59:56,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 03:59:56,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 03:59:56,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 03:59:56,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 410 transitions, 6074 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 03:59:56,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 03:59:56,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 03:59:56,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 03:59:59,003 INFO L124 PetriNetUnfolderBase]: 6604/10553 cut-off events. [2024-06-28 03:59:59,003 INFO L125 PetriNetUnfolderBase]: For 1043371/1043403 co-relation queries the response was YES. [2024-06-28 03:59:59,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81430 conditions, 10553 events. 6604/10553 cut-off events. For 1043371/1043403 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 71204 event pairs, 2773 based on Foata normal form. 25/10499 useless extension candidates. Maximal degree in co-relation 81299. Up to 9981 conditions per place. [2024-06-28 03:59:59,126 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 317 selfloop transitions, 50 changer transitions 0/429 dead transitions. [2024-06-28 03:59:59,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 429 transitions, 6898 flow [2024-06-28 03:59:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 03:59:59,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 03:59:59,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-28 03:59:59,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-28 03:59:59,127 INFO L175 Difference]: Start difference. First operand has 291 places, 410 transitions, 6074 flow. Second operand 7 states and 115 transitions. [2024-06-28 03:59:59,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 429 transitions, 6898 flow [2024-06-28 04:00:00,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 429 transitions, 6644 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-28 04:00:00,747 INFO L231 Difference]: Finished difference. Result has 288 places, 411 transitions, 5950 flow [2024-06-28 04:00:00,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5820, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5950, PETRI_PLACES=288, PETRI_TRANSITIONS=411} [2024-06-28 04:00:00,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-28 04:00:00,748 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 411 transitions, 5950 flow [2024-06-28 04:00:00,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:00,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:00,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:00,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-28 04:00:00,748 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)] === [2024-06-28 04:00:00,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:00,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1114643836, now seen corresponding path program 3 times [2024-06-28 04:00:00,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:00,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436054810] [2024-06-28 04:00:00,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:00,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:04,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:04,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:04,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436054810] [2024-06-28 04:00:04,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436054810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:04,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:04,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:00:04,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885565720] [2024-06-28 04:00:04,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:04,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:00:04,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:04,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:00:04,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:00:04,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:00:04,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 411 transitions, 5950 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:04,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:04,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:00:04,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:07,638 INFO L124 PetriNetUnfolderBase]: 6689/10691 cut-off events. [2024-06-28 04:00:07,638 INFO L125 PetriNetUnfolderBase]: For 1031565/1031597 co-relation queries the response was YES. [2024-06-28 04:00:07,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82399 conditions, 10691 events. 6689/10691 cut-off events. For 1031565/1031597 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 72295 event pairs, 2790 based on Foata normal form. 21/10630 useless extension candidates. Maximal degree in co-relation 82268. Up to 9917 conditions per place. [2024-06-28 04:00:07,759 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 317 selfloop transitions, 56 changer transitions 0/435 dead transitions. [2024-06-28 04:00:07,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 435 transitions, 6978 flow [2024-06-28 04:00:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:00:07,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:00:07,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-28 04:00:07,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-28 04:00:07,760 INFO L175 Difference]: Start difference. First operand has 288 places, 411 transitions, 5950 flow. Second operand 7 states and 117 transitions. [2024-06-28 04:00:07,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 435 transitions, 6978 flow [2024-06-28 04:00:09,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 435 transitions, 6868 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-28 04:00:09,910 INFO L231 Difference]: Finished difference. Result has 291 places, 414 transitions, 6041 flow [2024-06-28 04:00:09,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5840, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6041, PETRI_PLACES=291, PETRI_TRANSITIONS=414} [2024-06-28 04:00:09,911 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-28 04:00:09,911 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 414 transitions, 6041 flow [2024-06-28 04:00:09,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:09,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:09,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:09,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-28 04:00:09,911 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)] === [2024-06-28 04:00:09,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:09,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1277811102, now seen corresponding path program 4 times [2024-06-28 04:00:09,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:09,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171015931] [2024-06-28 04:00:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:09,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:13,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:13,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171015931] [2024-06-28 04:00:13,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171015931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:13,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:13,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:00:13,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825661005] [2024-06-28 04:00:13,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:13,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:00:13,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:13,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:00:13,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:00:13,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-28 04:00:13,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 414 transitions, 6041 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:13,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:13,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-28 04:00:13,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:16,861 INFO L124 PetriNetUnfolderBase]: 6648/10639 cut-off events. [2024-06-28 04:00:16,861 INFO L125 PetriNetUnfolderBase]: For 1045294/1045329 co-relation queries the response was YES. [2024-06-28 04:00:16,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81479 conditions, 10639 events. 6648/10639 cut-off events. For 1045294/1045329 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 72097 event pairs, 2857 based on Foata normal form. 26/10590 useless extension candidates. Maximal degree in co-relation 81346. Up to 9992 conditions per place. [2024-06-28 04:00:16,984 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 329 selfloop transitions, 47 changer transitions 0/438 dead transitions. [2024-06-28 04:00:16,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 438 transitions, 6879 flow [2024-06-28 04:00:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-28 04:00:16,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-28 04:00:16,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-28 04:00:16,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-28 04:00:16,986 INFO L175 Difference]: Start difference. First operand has 291 places, 414 transitions, 6041 flow. Second operand 7 states and 121 transitions. [2024-06-28 04:00:16,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 438 transitions, 6879 flow [2024-06-28 04:00:19,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 438 transitions, 6778 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-28 04:00:19,074 INFO L231 Difference]: Finished difference. Result has 294 places, 414 transitions, 6046 flow [2024-06-28 04:00:19,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5940, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6046, PETRI_PLACES=294, PETRI_TRANSITIONS=414} [2024-06-28 04:00:19,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-28 04:00:19,075 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 414 transitions, 6046 flow [2024-06-28 04:00:19,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:19,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:19,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:19,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-28 04:00:19,075 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)] === [2024-06-28 04:00:19,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:19,075 INFO L85 PathProgramCache]: Analyzing trace with hash 2123058594, now seen corresponding path program 1 times [2024-06-28 04:00:19,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:19,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521649181] [2024-06-28 04:00:19,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:19,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:22,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:22,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521649181] [2024-06-28 04:00:22,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521649181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:22,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:22,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:00:22,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738950494] [2024-06-28 04:00:22,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:22,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:00:22,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:22,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:00:22,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:00:22,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:00:22,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 414 transitions, 6046 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-28 04:00:22,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:22,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:00:22,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:25,388 INFO L124 PetriNetUnfolderBase]: 7014/11153 cut-off events. [2024-06-28 04:00:25,389 INFO L125 PetriNetUnfolderBase]: For 1071530/1071530 co-relation queries the response was YES. [2024-06-28 04:00:25,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85988 conditions, 11153 events. 7014/11153 cut-off events. For 1071530/1071530 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74669 event pairs, 2800 based on Foata normal form. 2/11154 useless extension candidates. Maximal degree in co-relation 85854. Up to 10684 conditions per place. [2024-06-28 04:00:25,542 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 48 changer transitions 0/455 dead transitions. [2024-06-28 04:00:25,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 455 transitions, 7364 flow [2024-06-28 04:00:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:00:25,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:00:25,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-28 04:00:25,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-28 04:00:25,544 INFO L175 Difference]: Start difference. First operand has 294 places, 414 transitions, 6046 flow. Second operand 8 states and 143 transitions. [2024-06-28 04:00:25,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 455 transitions, 7364 flow [2024-06-28 04:00:27,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 455 transitions, 7259 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-28 04:00:27,902 INFO L231 Difference]: Finished difference. Result has 296 places, 418 transitions, 6210 flow [2024-06-28 04:00:27,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5941, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6210, PETRI_PLACES=296, PETRI_TRANSITIONS=418} [2024-06-28 04:00:27,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-28 04:00:27,902 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 418 transitions, 6210 flow [2024-06-28 04:00:27,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-28 04:00:27,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:27,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:27,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-28 04:00:27,903 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)] === [2024-06-28 04:00:27,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:27,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2123061384, now seen corresponding path program 2 times [2024-06-28 04:00:27,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:27,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311108450] [2024-06-28 04:00:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:27,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:31,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:31,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311108450] [2024-06-28 04:00:31,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311108450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:31,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:31,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-28 04:00:31,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797822839] [2024-06-28 04:00:31,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:31,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-28 04:00:31,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:31,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-28 04:00:31,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-28 04:00:31,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:00:31,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 418 transitions, 6210 flow. Second operand has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-28 04:00:31,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:31,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:00:31,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:34,249 INFO L124 PetriNetUnfolderBase]: 7022/11167 cut-off events. [2024-06-28 04:00:34,249 INFO L125 PetriNetUnfolderBase]: For 1104000/1104000 co-relation queries the response was YES. [2024-06-28 04:00:34,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86739 conditions, 11167 events. 7022/11167 cut-off events. For 1104000/1104000 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 74761 event pairs, 2836 based on Foata normal form. 2/11168 useless extension candidates. Maximal degree in co-relation 86604. Up to 10821 conditions per place. [2024-06-28 04:00:34,382 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 398 selfloop transitions, 45 changer transitions 0/447 dead transitions. [2024-06-28 04:00:34,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 447 transitions, 7250 flow [2024-06-28 04:00:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:00:34,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:00:34,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 04:00:34,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 04:00:34,383 INFO L175 Difference]: Start difference. First operand has 296 places, 418 transitions, 6210 flow. Second operand 8 states and 133 transitions. [2024-06-28 04:00:34,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 447 transitions, 7250 flow [2024-06-28 04:00:36,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 447 transitions, 7101 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-28 04:00:36,237 INFO L231 Difference]: Finished difference. Result has 300 places, 420 transitions, 6246 flow [2024-06-28 04:00:36,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6069, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6246, PETRI_PLACES=300, PETRI_TRANSITIONS=420} [2024-06-28 04:00:36,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-28 04:00:36,238 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 420 transitions, 6246 flow [2024-06-28 04:00:36,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.0) internal successors, (81), 9 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) [2024-06-28 04:00:36,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:36,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:36,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-28 04:00:36,238 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)] === [2024-06-28 04:00:36,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:36,238 INFO L85 PathProgramCache]: Analyzing trace with hash 583808038, now seen corresponding path program 3 times [2024-06-28 04:00:36,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:36,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155958693] [2024-06-28 04:00:36,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:36,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:39,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:39,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155958693] [2024-06-28 04:00:39,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155958693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:39,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:39,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:00:39,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856323280] [2024-06-28 04:00:39,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:39,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:00:39,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:39,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:00:39,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:00:39,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:00:39,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 420 transitions, 6246 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:39,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:39,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:00:39,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:42,807 INFO L124 PetriNetUnfolderBase]: 7074/11247 cut-off events. [2024-06-28 04:00:42,807 INFO L125 PetriNetUnfolderBase]: For 1165416/1165416 co-relation queries the response was YES. [2024-06-28 04:00:42,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87807 conditions, 11247 events. 7074/11247 cut-off events. For 1165416/1165416 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 75583 event pairs, 2950 based on Foata normal form. 14/11260 useless extension candidates. Maximal degree in co-relation 87670. Up to 10957 conditions per place. [2024-06-28 04:00:42,974 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 418 selfloop transitions, 28 changer transitions 0/450 dead transitions. [2024-06-28 04:00:42,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 450 transitions, 7326 flow [2024-06-28 04:00:42,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:00:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:00:42,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2024-06-28 04:00:42,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523809523809524 [2024-06-28 04:00:42,975 INFO L175 Difference]: Start difference. First operand has 300 places, 420 transitions, 6246 flow. Second operand 10 states and 148 transitions. [2024-06-28 04:00:42,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 450 transitions, 7326 flow [2024-06-28 04:00:45,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 450 transitions, 7167 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-28 04:00:45,666 INFO L231 Difference]: Finished difference. Result has 304 places, 423 transitions, 6251 flow [2024-06-28 04:00:45,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6089, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6251, PETRI_PLACES=304, PETRI_TRANSITIONS=423} [2024-06-28 04:00:45,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-28 04:00:45,666 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 423 transitions, 6251 flow [2024-06-28 04:00:45,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:45,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:45,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:45,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-28 04:00:45,667 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)] === [2024-06-28 04:00:45,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:45,667 INFO L85 PathProgramCache]: Analyzing trace with hash 583992736, now seen corresponding path program 1 times [2024-06-28 04:00:45,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:45,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110859451] [2024-06-28 04:00:45,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:45,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:45,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:49,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:49,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110859451] [2024-06-28 04:00:49,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110859451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:49,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:49,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:00:49,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026050660] [2024-06-28 04:00:49,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:49,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:00:49,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:49,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:00:49,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:00:49,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:00:49,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 423 transitions, 6251 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:49,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:49,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:00:49,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:00:52,879 INFO L124 PetriNetUnfolderBase]: 7126/11327 cut-off events. [2024-06-28 04:00:52,880 INFO L125 PetriNetUnfolderBase]: For 1196899/1196899 co-relation queries the response was YES. [2024-06-28 04:00:52,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88615 conditions, 11327 events. 7126/11327 cut-off events. For 1196899/1196899 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 76072 event pairs, 2958 based on Foata normal form. 14/11340 useless extension candidates. Maximal degree in co-relation 88477. Up to 11037 conditions per place. [2024-06-28 04:00:53,034 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 421 selfloop transitions, 27 changer transitions 0/452 dead transitions. [2024-06-28 04:00:53,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 452 transitions, 7291 flow [2024-06-28 04:00:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:00:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:00:53,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-28 04:00:53,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-28 04:00:53,036 INFO L175 Difference]: Start difference. First operand has 304 places, 423 transitions, 6251 flow. Second operand 9 states and 140 transitions. [2024-06-28 04:00:53,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 452 transitions, 7291 flow [2024-06-28 04:00:54,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 452 transitions, 7175 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-28 04:00:54,649 INFO L231 Difference]: Finished difference. Result has 306 places, 425 transitions, 6253 flow [2024-06-28 04:00:54,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6135, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6253, PETRI_PLACES=306, PETRI_TRANSITIONS=425} [2024-06-28 04:00:54,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-28 04:00:54,650 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 425 transitions, 6253 flow [2024-06-28 04:00:54,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:54,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:00:54,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:00:54,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-28 04:00:54,650 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)] === [2024-06-28 04:00:54,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:00:54,650 INFO L85 PathProgramCache]: Analyzing trace with hash 619447876, now seen corresponding path program 4 times [2024-06-28 04:00:54,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:00:54,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049132820] [2024-06-28 04:00:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:00:54,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:00:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:00:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:00:58,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:00:58,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049132820] [2024-06-28 04:00:58,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049132820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:00:58,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:00:58,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:00:58,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874215861] [2024-06-28 04:00:58,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:00:58,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:00:58,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:00:58,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:00:58,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:00:58,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:00:58,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 425 transitions, 6253 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:00:58,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:00:58,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:00:58,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:01,350 INFO L124 PetriNetUnfolderBase]: 7093/11274 cut-off events. [2024-06-28 04:01:01,350 INFO L125 PetriNetUnfolderBase]: For 1192063/1192063 co-relation queries the response was YES. [2024-06-28 04:01:01,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87625 conditions, 11274 events. 7093/11274 cut-off events. For 1192063/1192063 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 75529 event pairs, 2785 based on Foata normal form. 14/11287 useless extension candidates. Maximal degree in co-relation 87486. Up to 10826 conditions per place. [2024-06-28 04:01:01,470 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 410 selfloop transitions, 47 changer transitions 0/461 dead transitions. [2024-06-28 04:01:01,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 461 transitions, 7283 flow [2024-06-28 04:01:01,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:01:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:01:01,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-28 04:01:01,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-28 04:01:01,471 INFO L175 Difference]: Start difference. First operand has 306 places, 425 transitions, 6253 flow. Second operand 9 states and 151 transitions. [2024-06-28 04:01:01,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 461 transitions, 7283 flow [2024-06-28 04:01:03,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 461 transitions, 7131 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-28 04:01:03,361 INFO L231 Difference]: Finished difference. Result has 308 places, 425 transitions, 6208 flow [2024-06-28 04:01:03,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6101, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6208, PETRI_PLACES=308, PETRI_TRANSITIONS=425} [2024-06-28 04:01:03,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-28 04:01:03,361 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 425 transitions, 6208 flow [2024-06-28 04:01:03,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:03,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:03,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:03,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-28 04:01:03,362 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)] === [2024-06-28 04:01:03,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:03,362 INFO L85 PathProgramCache]: Analyzing trace with hash 855807934, now seen corresponding path program 2 times [2024-06-28 04:01:03,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:03,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043795424] [2024-06-28 04:01:03,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:03,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:07,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:07,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043795424] [2024-06-28 04:01:07,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043795424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:07,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:07,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:01:07,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660425410] [2024-06-28 04:01:07,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:07,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:01:07,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:07,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:01:07,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:01:07,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:01:07,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 425 transitions, 6208 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:07,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:07,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:01:07,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:10,355 INFO L124 PetriNetUnfolderBase]: 7101/11292 cut-off events. [2024-06-28 04:01:10,355 INFO L125 PetriNetUnfolderBase]: For 1190409/1190409 co-relation queries the response was YES. [2024-06-28 04:01:10,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88032 conditions, 11292 events. 7101/11292 cut-off events. For 1190409/1190409 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 75687 event pairs, 2833 based on Foata normal form. 2/11293 useless extension candidates. Maximal degree in co-relation 87892. Up to 10962 conditions per place. [2024-06-28 04:01:10,526 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 406 selfloop transitions, 49 changer transitions 0/459 dead transitions. [2024-06-28 04:01:10,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 459 transitions, 7318 flow [2024-06-28 04:01:10,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:01:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:01:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-28 04:01:10,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-28 04:01:10,528 INFO L175 Difference]: Start difference. First operand has 308 places, 425 transitions, 6208 flow. Second operand 9 states and 141 transitions. [2024-06-28 04:01:10,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 459 transitions, 7318 flow [2024-06-28 04:01:12,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 459 transitions, 7207 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-28 04:01:12,411 INFO L231 Difference]: Finished difference. Result has 309 places, 432 transitions, 6342 flow [2024-06-28 04:01:12,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6105, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6342, PETRI_PLACES=309, PETRI_TRANSITIONS=432} [2024-06-28 04:01:12,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-28 04:01:12,412 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 432 transitions, 6342 flow [2024-06-28 04:01:12,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:12,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:12,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:12,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-28 04:01:12,412 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)] === [2024-06-28 04:01:12,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:12,412 INFO L85 PathProgramCache]: Analyzing trace with hash 856104604, now seen corresponding path program 3 times [2024-06-28 04:01:12,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:12,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192749247] [2024-06-28 04:01:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:12,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:15,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:15,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:15,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192749247] [2024-06-28 04:01:15,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192749247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:15,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:15,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:01:15,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20931782] [2024-06-28 04:01:15,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:15,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:01:15,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:01:15,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:01:15,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:01:15,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 432 transitions, 6342 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:15,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:15,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:01:15,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:18,935 INFO L124 PetriNetUnfolderBase]: 7168/11390 cut-off events. [2024-06-28 04:01:18,935 INFO L125 PetriNetUnfolderBase]: For 1218123/1218125 co-relation queries the response was YES. [2024-06-28 04:01:19,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89364 conditions, 11390 events. 7168/11390 cut-off events. For 1218123/1218125 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 76337 event pairs, 2826 based on Foata normal form. 4/11393 useless extension candidates. Maximal degree in co-relation 89223. Up to 10917 conditions per place. [2024-06-28 04:01:19,071 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 52 changer transitions 0/463 dead transitions. [2024-06-28 04:01:19,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 463 transitions, 7580 flow [2024-06-28 04:01:19,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-28 04:01:19,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-28 04:01:19,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-28 04:01:19,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-28 04:01:19,073 INFO L175 Difference]: Start difference. First operand has 309 places, 432 transitions, 6342 flow. Second operand 8 states and 133 transitions. [2024-06-28 04:01:19,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 463 transitions, 7580 flow [2024-06-28 04:01:21,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 463 transitions, 7457 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-28 04:01:21,259 INFO L231 Difference]: Finished difference. Result has 312 places, 435 transitions, 6416 flow [2024-06-28 04:01:21,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6219, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6416, PETRI_PLACES=312, PETRI_TRANSITIONS=435} [2024-06-28 04:01:21,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-28 04:01:21,259 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 435 transitions, 6416 flow [2024-06-28 04:01:21,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:21,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:21,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:21,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-28 04:01:21,260 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)] === [2024-06-28 04:01:21,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:21,260 INFO L85 PathProgramCache]: Analyzing trace with hash 731051469, now seen corresponding path program 1 times [2024-06-28 04:01:21,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:21,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062611865] [2024-06-28 04:01:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:21,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:24,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:24,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:24,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062611865] [2024-06-28 04:01:24,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062611865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:24,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:24,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-28 04:01:24,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195945726] [2024-06-28 04:01:24,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:24,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-28 04:01:24,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:24,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-28 04:01:24,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-28 04:01:24,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:01:24,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 435 transitions, 6416 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:24,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:24,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:01:24,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:27,989 INFO L124 PetriNetUnfolderBase]: 7150/11369 cut-off events. [2024-06-28 04:01:27,989 INFO L125 PetriNetUnfolderBase]: For 1244539/1244545 co-relation queries the response was YES. [2024-06-28 04:01:28,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89140 conditions, 11369 events. 7150/11369 cut-off events. For 1244539/1244545 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 76131 event pairs, 2740 based on Foata normal form. 14/11382 useless extension candidates. Maximal degree in co-relation 88998. Up to 10998 conditions per place. [2024-06-28 04:01:28,152 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 424 selfloop transitions, 46 changer transitions 0/474 dead transitions. [2024-06-28 04:01:28,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 474 transitions, 7475 flow [2024-06-28 04:01:28,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-28 04:01:28,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-28 04:01:28,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-28 04:01:28,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-28 04:01:28,153 INFO L175 Difference]: Start difference. First operand has 312 places, 435 transitions, 6416 flow. Second operand 9 states and 149 transitions. [2024-06-28 04:01:28,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 474 transitions, 7475 flow [2024-06-28 04:01:30,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 474 transitions, 7361 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-28 04:01:30,715 INFO L231 Difference]: Finished difference. Result has 317 places, 436 transitions, 6403 flow [2024-06-28 04:01:30,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6302, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6403, PETRI_PLACES=317, PETRI_TRANSITIONS=436} [2024-06-28 04:01:30,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-28 04:01:30,716 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 436 transitions, 6403 flow [2024-06-28 04:01:30,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:30,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:30,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:30,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-28 04:01:30,717 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)] === [2024-06-28 04:01:30,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:30,718 INFO L85 PathProgramCache]: Analyzing trace with hash -733332091, now seen corresponding path program 2 times [2024-06-28 04:01:30,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:30,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171748534] [2024-06-28 04:01:30,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:30,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:34,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:34,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171748534] [2024-06-28 04:01:34,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171748534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:34,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:34,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:01:34,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56258121] [2024-06-28 04:01:34,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:34,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:01:34,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:34,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:01:34,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:01:34,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:01:34,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 436 transitions, 6403 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:34,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:34,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:01:34,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:37,637 INFO L124 PetriNetUnfolderBase]: 7242/11517 cut-off events. [2024-06-28 04:01:37,637 INFO L125 PetriNetUnfolderBase]: For 1276253/1276259 co-relation queries the response was YES. [2024-06-28 04:01:37,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90446 conditions, 11517 events. 7242/11517 cut-off events. For 1276253/1276259 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 77440 event pairs, 2979 based on Foata normal form. 14/11530 useless extension candidates. Maximal degree in co-relation 90302. Up to 11148 conditions per place. [2024-06-28 04:01:37,789 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 430 selfloop transitions, 54 changer transitions 0/488 dead transitions. [2024-06-28 04:01:37,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 488 transitions, 7703 flow [2024-06-28 04:01:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:01:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:01:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-28 04:01:37,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-28 04:01:37,791 INFO L175 Difference]: Start difference. First operand has 317 places, 436 transitions, 6403 flow. Second operand 10 states and 160 transitions. [2024-06-28 04:01:37,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 488 transitions, 7703 flow [2024-06-28 04:01:40,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 488 transitions, 7447 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-28 04:01:40,598 INFO L231 Difference]: Finished difference. Result has 320 places, 449 transitions, 6481 flow [2024-06-28 04:01:40,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6173, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6481, PETRI_PLACES=320, PETRI_TRANSITIONS=449} [2024-06-28 04:01:40,599 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-28 04:01:40,599 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 449 transitions, 6481 flow [2024-06-28 04:01:40,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:40,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:40,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:40,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-28 04:01:40,599 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)] === [2024-06-28 04:01:40,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:40,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1300321387, now seen corresponding path program 3 times [2024-06-28 04:01:40,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:40,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67959447] [2024-06-28 04:01:40,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:40,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:40,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:44,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:44,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67959447] [2024-06-28 04:01:44,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67959447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:44,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:44,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:01:44,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533922063] [2024-06-28 04:01:44,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:44,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:01:44,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:44,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:01:44,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:01:44,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:01:44,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 449 transitions, 6481 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:44,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:44,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:01:44,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:47,453 INFO L124 PetriNetUnfolderBase]: 7278/11570 cut-off events. [2024-06-28 04:01:47,453 INFO L125 PetriNetUnfolderBase]: For 1306002/1306002 co-relation queries the response was YES. [2024-06-28 04:01:47,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90607 conditions, 11570 events. 7278/11570 cut-off events. For 1306002/1306002 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 77779 event pairs, 3004 based on Foata normal form. 8/11577 useless extension candidates. Maximal degree in co-relation 90463. Up to 11186 conditions per place. [2024-06-28 04:01:47,623 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 424 selfloop transitions, 57 changer transitions 0/485 dead transitions. [2024-06-28 04:01:47,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 485 transitions, 7598 flow [2024-06-28 04:01:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:01:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:01:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 166 transitions. [2024-06-28 04:01:47,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3593073593073593 [2024-06-28 04:01:47,624 INFO L175 Difference]: Start difference. First operand has 320 places, 449 transitions, 6481 flow. Second operand 11 states and 166 transitions. [2024-06-28 04:01:47,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 485 transitions, 7598 flow [2024-06-28 04:01:50,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 485 transitions, 7496 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-28 04:01:50,293 INFO L231 Difference]: Finished difference. Result has 327 places, 452 transitions, 6549 flow [2024-06-28 04:01:50,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6379, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6549, PETRI_PLACES=327, PETRI_TRANSITIONS=452} [2024-06-28 04:01:50,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-28 04:01:50,294 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 452 transitions, 6549 flow [2024-06-28 04:01:50,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:50,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:01:50,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:01:50,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-28 04:01:50,294 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)] === [2024-06-28 04:01:50,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:01:50,294 INFO L85 PathProgramCache]: Analyzing trace with hash 856819183, now seen corresponding path program 1 times [2024-06-28 04:01:50,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:01:50,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611888935] [2024-06-28 04:01:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:01:50,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:01:50,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:01:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:01:53,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:01:53,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611888935] [2024-06-28 04:01:53,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611888935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:01:53,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:01:53,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:01:53,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140872588] [2024-06-28 04:01:53,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:01:53,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:01:53,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:01:53,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:01:53,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:01:53,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:01:53,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 452 transitions, 6549 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:01:53,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:01:53,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:01:53,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:01:57,339 INFO L124 PetriNetUnfolderBase]: 7320/11635 cut-off events. [2024-06-28 04:01:57,339 INFO L125 PetriNetUnfolderBase]: For 1338897/1338903 co-relation queries the response was YES. [2024-06-28 04:01:57,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91842 conditions, 11635 events. 7320/11635 cut-off events. For 1338897/1338903 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 78310 event pairs, 2838 based on Foata normal form. 8/11642 useless extension candidates. Maximal degree in co-relation 91696. Up to 11056 conditions per place. [2024-06-28 04:01:57,517 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 405 selfloop transitions, 96 changer transitions 0/505 dead transitions. [2024-06-28 04:01:57,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 505 transitions, 8125 flow [2024-06-28 04:01:57,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:01:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:01:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-28 04:01:57,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-28 04:01:57,518 INFO L175 Difference]: Start difference. First operand has 327 places, 452 transitions, 6549 flow. Second operand 11 states and 186 transitions. [2024-06-28 04:01:57,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 505 transitions, 8125 flow [2024-06-28 04:02:00,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 505 transitions, 7996 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-28 04:02:00,704 INFO L231 Difference]: Finished difference. Result has 332 places, 458 transitions, 6808 flow [2024-06-28 04:02:00,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6420, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6808, PETRI_PLACES=332, PETRI_TRANSITIONS=458} [2024-06-28 04:02:00,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-28 04:02:00,704 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 458 transitions, 6808 flow [2024-06-28 04:02:00,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:00,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:00,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:00,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-28 04:02:00,705 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)] === [2024-06-28 04:02:00,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash -39759691, now seen corresponding path program 1 times [2024-06-28 04:02:00,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:00,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815671380] [2024-06-28 04:02:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:00,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:04,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:04,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815671380] [2024-06-28 04:02:04,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815671380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:04,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:04,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:02:04,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906772975] [2024-06-28 04:02:04,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:04,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:02:04,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:04,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:02:04,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:02:04,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:04,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 458 transitions, 6808 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:04,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:04,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:04,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:07,838 INFO L124 PetriNetUnfolderBase]: 7310/11619 cut-off events. [2024-06-28 04:02:07,838 INFO L125 PetriNetUnfolderBase]: For 1374488/1374494 co-relation queries the response was YES. [2024-06-28 04:02:07,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93725 conditions, 11619 events. 7310/11619 cut-off events. For 1374488/1374494 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 77939 event pairs, 2938 based on Foata normal form. 12/11630 useless extension candidates. Maximal degree in co-relation 93578. Up to 11236 conditions per place. [2024-06-28 04:02:07,985 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 424 selfloop transitions, 69 changer transitions 0/497 dead transitions. [2024-06-28 04:02:07,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 497 transitions, 8061 flow [2024-06-28 04:02:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:02:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:02:07,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-28 04:02:07,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 04:02:07,986 INFO L175 Difference]: Start difference. First operand has 332 places, 458 transitions, 6808 flow. Second operand 10 states and 165 transitions. [2024-06-28 04:02:07,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 497 transitions, 8061 flow [2024-06-28 04:02:10,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 497 transitions, 7796 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-28 04:02:10,657 INFO L231 Difference]: Finished difference. Result has 334 places, 459 transitions, 6700 flow [2024-06-28 04:02:10,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6543, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6700, PETRI_PLACES=334, PETRI_TRANSITIONS=459} [2024-06-28 04:02:10,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 291 predicate places. [2024-06-28 04:02:10,658 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 459 transitions, 6700 flow [2024-06-28 04:02:10,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:10,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:10,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:10,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-28 04:02:10,659 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)] === [2024-06-28 04:02:10,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:10,659 INFO L85 PathProgramCache]: Analyzing trace with hash -740858403, now seen corresponding path program 2 times [2024-06-28 04:02:10,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:10,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478173206] [2024-06-28 04:02:10,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:10,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:14,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:14,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478173206] [2024-06-28 04:02:14,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478173206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:14,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:14,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:02:14,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852848801] [2024-06-28 04:02:14,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:14,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:02:14,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:14,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:02:14,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:02:14,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:14,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 459 transitions, 6700 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:14,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:14,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:14,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:17,888 INFO L124 PetriNetUnfolderBase]: 7284/11583 cut-off events. [2024-06-28 04:02:17,888 INFO L125 PetriNetUnfolderBase]: For 1387679/1387685 co-relation queries the response was YES. [2024-06-28 04:02:17,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93297 conditions, 11583 events. 7284/11583 cut-off events. For 1387679/1387685 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 77605 event pairs, 2982 based on Foata normal form. 12/11594 useless extension candidates. Maximal degree in co-relation 93149. Up to 11217 conditions per place. [2024-06-28 04:02:18,021 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 423 selfloop transitions, 69 changer transitions 0/496 dead transitions. [2024-06-28 04:02:18,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 496 transitions, 7784 flow [2024-06-28 04:02:18,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:02:18,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:02:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-28 04:02:18,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-28 04:02:18,022 INFO L175 Difference]: Start difference. First operand has 334 places, 459 transitions, 6700 flow. Second operand 10 states and 164 transitions. [2024-06-28 04:02:18,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 496 transitions, 7784 flow [2024-06-28 04:02:21,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 496 transitions, 7525 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-28 04:02:21,556 INFO L231 Difference]: Finished difference. Result has 336 places, 459 transitions, 6587 flow [2024-06-28 04:02:21,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6441, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6587, PETRI_PLACES=336, PETRI_TRANSITIONS=459} [2024-06-28 04:02:21,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-28 04:02:21,557 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 459 transitions, 6587 flow [2024-06-28 04:02:21,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:21,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:21,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:21,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-28 04:02:21,557 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)] === [2024-06-28 04:02:21,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1086445449, now seen corresponding path program 2 times [2024-06-28 04:02:21,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:21,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162708646] [2024-06-28 04:02:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:21,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:25,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:25,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162708646] [2024-06-28 04:02:25,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162708646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:25,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:25,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:02:25,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543315213] [2024-06-28 04:02:25,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:25,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:02:25,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:25,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:02:25,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:02:25,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:25,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 459 transitions, 6587 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:25,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:25,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:25,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:29,564 INFO L124 PetriNetUnfolderBase]: 7378/11715 cut-off events. [2024-06-28 04:02:29,564 INFO L125 PetriNetUnfolderBase]: For 1423204/1423210 co-relation queries the response was YES. [2024-06-28 04:02:29,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93390 conditions, 11715 events. 7378/11715 cut-off events. For 1423204/1423210 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 78435 event pairs, 2951 based on Foata normal form. 12/11726 useless extension candidates. Maximal degree in co-relation 93242. Up to 11268 conditions per place. [2024-06-28 04:02:29,708 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 428 selfloop transitions, 86 changer transitions 1/519 dead transitions. [2024-06-28 04:02:29,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 519 transitions, 8183 flow [2024-06-28 04:02:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-28 04:02:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-28 04:02:29,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 204 transitions. [2024-06-28 04:02:29,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37362637362637363 [2024-06-28 04:02:29,709 INFO L175 Difference]: Start difference. First operand has 336 places, 459 transitions, 6587 flow. Second operand 13 states and 204 transitions. [2024-06-28 04:02:29,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 519 transitions, 8183 flow [2024-06-28 04:02:32,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 519 transitions, 8003 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-28 04:02:32,929 INFO L231 Difference]: Finished difference. Result has 341 places, 474 transitions, 6876 flow [2024-06-28 04:02:32,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6419, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6876, PETRI_PLACES=341, PETRI_TRANSITIONS=474} [2024-06-28 04:02:32,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-28 04:02:32,930 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 474 transitions, 6876 flow [2024-06-28 04:02:32,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:32,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:32,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:32,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-28 04:02:32,930 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)] === [2024-06-28 04:02:32,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:32,930 INFO L85 PathProgramCache]: Analyzing trace with hash 151605779, now seen corresponding path program 3 times [2024-06-28 04:02:32,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:32,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380944810] [2024-06-28 04:02:32,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:32,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:36,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:36,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380944810] [2024-06-28 04:02:36,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380944810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:36,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:36,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:02:36,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738633143] [2024-06-28 04:02:36,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:36,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:02:36,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:36,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:02:36,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:02:36,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:36,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 474 transitions, 6876 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:36,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:36,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:36,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:39,993 INFO L124 PetriNetUnfolderBase]: 7360/11691 cut-off events. [2024-06-28 04:02:39,993 INFO L125 PetriNetUnfolderBase]: For 1436987/1436993 co-relation queries the response was YES. [2024-06-28 04:02:40,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93553 conditions, 11691 events. 7360/11691 cut-off events. For 1436987/1436993 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 78277 event pairs, 2956 based on Foata normal form. 8/11698 useless extension candidates. Maximal degree in co-relation 93403. Up to 11257 conditions per place. [2024-06-28 04:02:40,155 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 422 selfloop transitions, 87 changer transitions 2/515 dead transitions. [2024-06-28 04:02:40,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 515 transitions, 8022 flow [2024-06-28 04:02:40,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:02:40,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:02:40,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 188 transitions. [2024-06-28 04:02:40,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-28 04:02:40,156 INFO L175 Difference]: Start difference. First operand has 341 places, 474 transitions, 6876 flow. Second operand 12 states and 188 transitions. [2024-06-28 04:02:40,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 515 transitions, 8022 flow [2024-06-28 04:02:43,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 515 transitions, 7894 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-28 04:02:43,832 INFO L231 Difference]: Finished difference. Result has 345 places, 473 transitions, 6912 flow [2024-06-28 04:02:43,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6748, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6912, PETRI_PLACES=345, PETRI_TRANSITIONS=473} [2024-06-28 04:02:43,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-28 04:02:43,832 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 473 transitions, 6912 flow [2024-06-28 04:02:43,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:43,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:43,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:43,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-28 04:02:43,833 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)] === [2024-06-28 04:02:43,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:43,834 INFO L85 PathProgramCache]: Analyzing trace with hash 8309333, now seen corresponding path program 3 times [2024-06-28 04:02:43,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:43,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439075466] [2024-06-28 04:02:43,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:43,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:47,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:47,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:47,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439075466] [2024-06-28 04:02:47,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439075466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:47,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:47,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:02:47,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540548235] [2024-06-28 04:02:47,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:47,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:02:47,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:47,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:02:47,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:02:47,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:47,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 473 transitions, 6912 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:47,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:47,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:47,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:02:50,731 INFO L124 PetriNetUnfolderBase]: 7442/11799 cut-off events. [2024-06-28 04:02:50,731 INFO L125 PetriNetUnfolderBase]: For 1512712/1512714 co-relation queries the response was YES. [2024-06-28 04:02:50,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96243 conditions, 11799 events. 7442/11799 cut-off events. For 1512712/1512714 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 78883 event pairs, 2821 based on Foata normal form. 4/11802 useless extension candidates. Maximal degree in co-relation 96091. Up to 10357 conditions per place. [2024-06-28 04:02:50,904 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 333 selfloop transitions, 207 changer transitions 0/544 dead transitions. [2024-06-28 04:02:50,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 544 transitions, 8982 flow [2024-06-28 04:02:50,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-28 04:02:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-28 04:02:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 222 transitions. [2024-06-28 04:02:50,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-28 04:02:50,905 INFO L175 Difference]: Start difference. First operand has 345 places, 473 transitions, 6912 flow. Second operand 12 states and 222 transitions. [2024-06-28 04:02:50,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 544 transitions, 8982 flow [2024-06-28 04:02:54,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 544 transitions, 8818 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-28 04:02:54,724 INFO L231 Difference]: Finished difference. Result has 348 places, 482 transitions, 7376 flow [2024-06-28 04:02:54,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6748, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7376, PETRI_PLACES=348, PETRI_TRANSITIONS=482} [2024-06-28 04:02:54,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-28 04:02:54,725 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 482 transitions, 7376 flow [2024-06-28 04:02:54,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:54,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:02:54,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:02:54,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-28 04:02:54,725 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)] === [2024-06-28 04:02:54,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:02:54,726 INFO L85 PathProgramCache]: Analyzing trace with hash 98768459, now seen corresponding path program 4 times [2024-06-28 04:02:54,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:02:54,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561372191] [2024-06-28 04:02:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:02:54,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:02:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:02:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:02:58,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:02:58,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561372191] [2024-06-28 04:02:58,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561372191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:02:58,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:02:58,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:02:58,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469709803] [2024-06-28 04:02:58,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:02:58,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:02:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:02:58,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:02:58,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:02:58,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:02:58,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 482 transitions, 7376 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:02:58,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:02:58,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:02:58,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:01,883 INFO L124 PetriNetUnfolderBase]: 7507/11900 cut-off events. [2024-06-28 04:03:01,883 INFO L125 PetriNetUnfolderBase]: For 1568607/1568609 co-relation queries the response was YES. [2024-06-28 04:03:02,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99735 conditions, 11900 events. 7507/11900 cut-off events. For 1568607/1568609 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 79680 event pairs, 3027 based on Foata normal form. 8/11907 useless extension candidates. Maximal degree in co-relation 99582. Up to 11422 conditions per place. [2024-06-28 04:03:02,050 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 417 selfloop transitions, 103 changer transitions 3/527 dead transitions. [2024-06-28 04:03:02,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 527 transitions, 8673 flow [2024-06-28 04:03:02,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:03:02,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:03:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-28 04:03:02,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-28 04:03:02,051 INFO L175 Difference]: Start difference. First operand has 348 places, 482 transitions, 7376 flow. Second operand 10 states and 164 transitions. [2024-06-28 04:03:02,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 527 transitions, 8673 flow [2024-06-28 04:03:05,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 527 transitions, 8376 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-28 04:03:05,277 INFO L231 Difference]: Finished difference. Result has 353 places, 492 transitions, 7463 flow [2024-06-28 04:03:05,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7088, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7463, PETRI_PLACES=353, PETRI_TRANSITIONS=492} [2024-06-28 04:03:05,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-28 04:03:05,278 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 492 transitions, 7463 flow [2024-06-28 04:03:05,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:05,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:05,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:05,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-28 04:03:05,278 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)] === [2024-06-28 04:03:05,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:05,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1189073391, now seen corresponding path program 4 times [2024-06-28 04:03:05,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:05,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907111077] [2024-06-28 04:03:05,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:05,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:08,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:08,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:08,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907111077] [2024-06-28 04:03:08,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907111077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:08,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:08,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:08,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143289209] [2024-06-28 04:03:08,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:08,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:08,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:08,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:08,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:08,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:08,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 492 transitions, 7463 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:08,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:08,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:08,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:12,546 INFO L124 PetriNetUnfolderBase]: 7493/11882 cut-off events. [2024-06-28 04:03:12,546 INFO L125 PetriNetUnfolderBase]: For 1588676/1588678 co-relation queries the response was YES. [2024-06-28 04:03:12,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98467 conditions, 11882 events. 7493/11882 cut-off events. For 1588676/1588678 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 79478 event pairs, 2805 based on Foata normal form. 4/11885 useless extension candidates. Maximal degree in co-relation 98311. Up to 10393 conditions per place. [2024-06-28 04:03:12,697 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 321 selfloop transitions, 223 changer transitions 0/548 dead transitions. [2024-06-28 04:03:12,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 548 transitions, 9459 flow [2024-06-28 04:03:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:03:12,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:03:12,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 198 transitions. [2024-06-28 04:03:12,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-28 04:03:12,698 INFO L175 Difference]: Start difference. First operand has 353 places, 492 transitions, 7463 flow. Second operand 11 states and 198 transitions. [2024-06-28 04:03:12,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 548 transitions, 9459 flow [2024-06-28 04:03:16,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 548 transitions, 9224 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-28 04:03:16,109 INFO L231 Difference]: Finished difference. Result has 359 places, 498 transitions, 7910 flow [2024-06-28 04:03:16,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7228, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7910, PETRI_PLACES=359, PETRI_TRANSITIONS=498} [2024-06-28 04:03:16,110 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-28 04:03:16,110 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 498 transitions, 7910 flow [2024-06-28 04:03:16,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:16,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:16,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:16,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-28 04:03:16,110 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)] === [2024-06-28 04:03:16,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:16,110 INFO L85 PathProgramCache]: Analyzing trace with hash 13970615, now seen corresponding path program 1 times [2024-06-28 04:03:16,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:16,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778489350] [2024-06-28 04:03:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:16,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:20,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:20,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:20,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778489350] [2024-06-28 04:03:20,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778489350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:20,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:20,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:20,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650237587] [2024-06-28 04:03:20,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:20,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:20,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:20,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:20,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:20,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:20,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 498 transitions, 7910 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:20,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:20,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:20,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:23,910 INFO L124 PetriNetUnfolderBase]: 7481/11853 cut-off events. [2024-06-28 04:03:23,910 INFO L125 PetriNetUnfolderBase]: For 1619796/1619804 co-relation queries the response was YES. [2024-06-28 04:03:24,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99252 conditions, 11853 events. 7481/11853 cut-off events. For 1619796/1619804 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 79235 event pairs, 2977 based on Foata normal form. 12/11864 useless extension candidates. Maximal degree in co-relation 99094. Up to 11283 conditions per place. [2024-06-28 04:03:24,075 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 429 selfloop transitions, 109 changer transitions 0/542 dead transitions. [2024-06-28 04:03:24,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 542 transitions, 9270 flow [2024-06-28 04:03:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:03:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:03:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-28 04:03:24,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2024-06-28 04:03:24,077 INFO L175 Difference]: Start difference. First operand has 359 places, 498 transitions, 7910 flow. Second operand 11 states and 183 transitions. [2024-06-28 04:03:24,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 542 transitions, 9270 flow [2024-06-28 04:03:27,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 542 transitions, 8767 flow, removed 70 selfloop flow, removed 7 redundant places. [2024-06-28 04:03:27,314 INFO L231 Difference]: Finished difference. Result has 363 places, 498 transitions, 7631 flow [2024-06-28 04:03:27,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7407, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7631, PETRI_PLACES=363, PETRI_TRANSITIONS=498} [2024-06-28 04:03:27,314 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-28 04:03:27,314 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 498 transitions, 7631 flow [2024-06-28 04:03:27,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:27,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:27,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:27,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-28 04:03:27,315 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)] === [2024-06-28 04:03:27,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:27,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1625771627, now seen corresponding path program 5 times [2024-06-28 04:03:27,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:27,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956453334] [2024-06-28 04:03:27,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:27,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:31,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:31,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956453334] [2024-06-28 04:03:31,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956453334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:31,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:31,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:31,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054904078] [2024-06-28 04:03:31,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:31,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:31,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:31,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:31,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:31,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:31,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 498 transitions, 7631 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:31,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:31,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:31,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:34,992 INFO L124 PetriNetUnfolderBase]: 7475/11862 cut-off events. [2024-06-28 04:03:34,993 INFO L125 PetriNetUnfolderBase]: For 1642651/1642653 co-relation queries the response was YES. [2024-06-28 04:03:35,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98685 conditions, 11862 events. 7475/11862 cut-off events. For 1642651/1642653 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 79417 event pairs, 2800 based on Foata normal form. 4/11865 useless extension candidates. Maximal degree in co-relation 98526. Up to 10386 conditions per place. [2024-06-28 04:03:35,135 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 317 selfloop transitions, 222 changer transitions 0/543 dead transitions. [2024-06-28 04:03:35,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 543 transitions, 9237 flow [2024-06-28 04:03:35,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:03:35,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:03:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2024-06-28 04:03:35,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41774891774891776 [2024-06-28 04:03:35,136 INFO L175 Difference]: Start difference. First operand has 363 places, 498 transitions, 7631 flow. Second operand 11 states and 193 transitions. [2024-06-28 04:03:35,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 543 transitions, 9237 flow [2024-06-28 04:03:38,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 543 transitions, 8914 flow, removed 42 selfloop flow, removed 10 redundant places. [2024-06-28 04:03:38,605 INFO L231 Difference]: Finished difference. Result has 364 places, 498 transitions, 7758 flow [2024-06-28 04:03:38,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7308, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7758, PETRI_PLACES=364, PETRI_TRANSITIONS=498} [2024-06-28 04:03:38,605 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-28 04:03:38,606 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 498 transitions, 7758 flow [2024-06-28 04:03:38,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:38,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:38,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:38,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-28 04:03:38,606 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)] === [2024-06-28 04:03:38,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:38,607 INFO L85 PathProgramCache]: Analyzing trace with hash 108022889, now seen corresponding path program 5 times [2024-06-28 04:03:38,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:38,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413634299] [2024-06-28 04:03:38,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:38,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:42,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:42,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413634299] [2024-06-28 04:03:42,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413634299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:42,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:42,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:42,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881156185] [2024-06-28 04:03:42,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:42,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:42,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:42,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:42,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:42,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:42,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 498 transitions, 7758 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:42,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:42,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:42,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:46,788 INFO L124 PetriNetUnfolderBase]: 7606/12075 cut-off events. [2024-06-28 04:03:46,789 INFO L125 PetriNetUnfolderBase]: For 1715508/1715510 co-relation queries the response was YES. [2024-06-28 04:03:46,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101464 conditions, 12075 events. 7606/12075 cut-off events. For 1715508/1715510 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 81020 event pairs, 3003 based on Foata normal form. 8/12082 useless extension candidates. Maximal degree in co-relation 101304. Up to 11401 conditions per place. [2024-06-28 04:03:47,021 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 415 selfloop transitions, 129 changer transitions 1/549 dead transitions. [2024-06-28 04:03:47,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 549 transitions, 9421 flow [2024-06-28 04:03:47,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:03:47,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:03:47,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 178 transitions. [2024-06-28 04:03:47,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3852813852813853 [2024-06-28 04:03:47,023 INFO L175 Difference]: Start difference. First operand has 364 places, 498 transitions, 7758 flow. Second operand 11 states and 178 transitions. [2024-06-28 04:03:47,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 549 transitions, 9421 flow [2024-06-28 04:03:50,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 549 transitions, 8920 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-28 04:03:50,604 INFO L231 Difference]: Finished difference. Result has 366 places, 514 transitions, 7841 flow [2024-06-28 04:03:50,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7296, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7841, PETRI_PLACES=366, PETRI_TRANSITIONS=514} [2024-06-28 04:03:50,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-28 04:03:50,605 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 514 transitions, 7841 flow [2024-06-28 04:03:50,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:50,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:03:50,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:03:50,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-28 04:03:50,605 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)] === [2024-06-28 04:03:50,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:03:50,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1622046791, now seen corresponding path program 6 times [2024-06-28 04:03:50,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:03:50,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251301336] [2024-06-28 04:03:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:03:50,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:03:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:03:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:03:54,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:03:54,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251301336] [2024-06-28 04:03:54,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251301336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:03:54,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:03:54,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:03:54,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109094489] [2024-06-28 04:03:54,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:03:54,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:03:54,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:03:54,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:03:54,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:03:54,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:03:54,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 514 transitions, 7841 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:03:54,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:03:54,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:03:54,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:03:58,311 INFO L124 PetriNetUnfolderBase]: 7576/12035 cut-off events. [2024-06-28 04:03:58,311 INFO L125 PetriNetUnfolderBase]: For 1726573/1726575 co-relation queries the response was YES. [2024-06-28 04:03:58,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100563 conditions, 12035 events. 7576/12035 cut-off events. For 1726573/1726575 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 80861 event pairs, 2996 based on Foata normal form. 8/12042 useless extension candidates. Maximal degree in co-relation 100401. Up to 11382 conditions per place. [2024-06-28 04:03:58,469 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 410 selfloop transitions, 130 changer transitions 2/546 dead transitions. [2024-06-28 04:03:58,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 546 transitions, 9023 flow [2024-06-28 04:03:58,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-28 04:03:58,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-28 04:03:58,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-28 04:03:58,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-28 04:03:58,470 INFO L175 Difference]: Start difference. First operand has 366 places, 514 transitions, 7841 flow. Second operand 10 states and 165 transitions. [2024-06-28 04:03:58,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 546 transitions, 9023 flow [2024-06-28 04:04:02,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 546 transitions, 8881 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-28 04:04:02,344 INFO L231 Difference]: Finished difference. Result has 371 places, 513 transitions, 7953 flow [2024-06-28 04:04:02,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7699, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7953, PETRI_PLACES=371, PETRI_TRANSITIONS=513} [2024-06-28 04:04:02,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-28 04:04:02,344 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 513 transitions, 7953 flow [2024-06-28 04:04:02,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:02,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:02,345 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:02,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-28 04:04:02,345 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)] === [2024-06-28 04:04:02,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:02,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1478156261, now seen corresponding path program 7 times [2024-06-28 04:04:02,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:02,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127118934] [2024-06-28 04:04:02,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:02,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:05,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:05,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:05,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127118934] [2024-06-28 04:04:05,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127118934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:05,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:05,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:04:05,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532271951] [2024-06-28 04:04:05,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:05,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:04:05,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:05,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:04:05,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:04:05,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:04:05,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 513 transitions, 7953 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:05,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:05,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:04:05,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-28 04:04:10,107 INFO L124 PetriNetUnfolderBase]: 7907/12511 cut-off events. [2024-06-28 04:04:10,107 INFO L125 PetriNetUnfolderBase]: For 1859215/1859217 co-relation queries the response was YES. [2024-06-28 04:04:10,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106767 conditions, 12511 events. 7907/12511 cut-off events. For 1859215/1859217 co-relation queries the response was YES. Maximal size of possible extension queue 538. Compared 84025 event pairs, 2959 based on Foata normal form. 8/12518 useless extension candidates. Maximal degree in co-relation 106603. Up to 11435 conditions per place. [2024-06-28 04:04:10,272 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 402 selfloop transitions, 188 changer transitions 1/595 dead transitions. [2024-06-28 04:04:10,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 595 transitions, 10609 flow [2024-06-28 04:04:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-28 04:04:10,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-28 04:04:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-28 04:04:10,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-28 04:04:10,276 INFO L175 Difference]: Start difference. First operand has 371 places, 513 transitions, 7953 flow. Second operand 11 states and 182 transitions. [2024-06-28 04:04:10,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 595 transitions, 10609 flow [2024-06-28 04:04:15,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 595 transitions, 10345 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-28 04:04:15,198 INFO L231 Difference]: Finished difference. Result has 378 places, 556 transitions, 9026 flow [2024-06-28 04:04:15,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7707, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9026, PETRI_PLACES=378, PETRI_TRANSITIONS=556} [2024-06-28 04:04:15,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-28 04:04:15,199 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 556 transitions, 9026 flow [2024-06-28 04:04:15,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:15,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-28 04:04:15,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-28 04:04:15,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-28 04:04:15,200 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)] === [2024-06-28 04:04:15,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-28 04:04:15,200 INFO L85 PathProgramCache]: Analyzing trace with hash 514007753, now seen corresponding path program 8 times [2024-06-28 04:04:15,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-28 04:04:15,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564940608] [2024-06-28 04:04:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-28 04:04:15,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-28 04:04:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-28 04:04:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-28 04:04:19,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-28 04:04:19,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564940608] [2024-06-28 04:04:19,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564940608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-28 04:04:19,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-28 04:04:19,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-28 04:04:19,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854300343] [2024-06-28 04:04:19,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-28 04:04:19,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-28 04:04:19,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-28 04:04:19,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-28 04:04:19,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-28 04:04:19,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-28 04:04:19,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 556 transitions, 9026 flow. Second operand has 10 states, 10 states have (on average 8.8) internal successors, (88), 10 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-28 04:04:19,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-28 04:04:19,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-28 04:04:19,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand