./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix053_tso.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/protection/mix053_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/mix053_tso.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix053_tso.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-eb4cb34-m [2024-06-21 17:01:24,699 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 17:01:24,754 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 17:01:24,760 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 17:01:24,760 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 17:01:24,788 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 17:01:24,791 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 17:01:24,791 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 17:01:24,791 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 17:01:24,792 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 17:01:24,792 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 17:01:24,792 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 17:01:24,792 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 17:01:24,793 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 17:01:24,793 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 17:01:24,793 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 17:01:24,793 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 17:01:24,794 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 17:01:24,794 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 17:01:24,794 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 17:01:24,797 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 17:01:24,798 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 17:01:24,798 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 17:01:24,798 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 17:01:24,798 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 17:01:24,798 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 17:01:24,799 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 17:01:24,799 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 17:01:24,799 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 17:01:24,800 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 17:01:24,800 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 17:01:24,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 17:01:24,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:01:24,802 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 17:01:24,802 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 17:01:24,802 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 17:01:24,802 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 17:01:24,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 17:01:24,803 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 17:01:24,803 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 17:01:24,803 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 17:01:24,803 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 17:01:24,803 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 17:01:24,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 17:01:24,995 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 17:01:25,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 17:01:25,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 17:01:25,022 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 17:01:25,022 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 17:01:25,023 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix053_tso.oepc.yml/witness.yml [2024-06-21 17:01:25,185 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 17:01:25,186 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 17:01:25,186 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix053_tso.oepc.i [2024-06-21 17:01:26,264 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 17:01:26,503 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 17:01:26,503 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix053_tso.oepc.i [2024-06-21 17:01:26,517 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ac015b59/b043fe28982b4b5e87f7e8637406a31a/FLAGe6502b5ef [2024-06-21 17:01:26,527 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ac015b59/b043fe28982b4b5e87f7e8637406a31a [2024-06-21 17:01:26,528 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 17:01:26,529 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 17:01:26,529 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 17:01:26,530 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 17:01:26,544 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 17:01:26,545 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:01:25" (1/2) ... [2024-06-21 17:01:26,545 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c3cb9ee and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:01:26, skipping insertion in model container [2024-06-21 17:01:26,546 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:01:25" (1/2) ... [2024-06-21 17:01:26,547 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2494c8bb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 05:01:26, skipping insertion in model container [2024-06-21 17:01:26,547 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:01:26" (2/2) ... [2024-06-21 17:01:26,547 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c3cb9ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:26, skipping insertion in model container [2024-06-21 17:01:26,547 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 05:01:26" (2/2) ... [2024-06-21 17:01:26,553 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 17:01:26,632 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 17:01:26,634 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] ((((((((((((((((((((! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) [2024-06-21 17:01:26,634 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((((((! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) [2024-06-21 17:01:26,634 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((((! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) [2024-06-21 17:01:26,634 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] ((((((((((((((((((((! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 2)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 2))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)) [2024-06-21 17:01:26,634 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 17:01:26,635 INFO L106 edCorrectnessWitness]: ghost_update [L842-L842] multithreaded = 1; [2024-06-21 17:01:26,672 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 17:01:26,951 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:01:26,958 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 17:01:27,049 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 17:01:27,078 INFO L206 MainTranslator]: Completed translation [2024-06-21 17:01:27,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27 WrapperNode [2024-06-21 17:01:27,079 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 17:01:27,079 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 17:01:27,080 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 17:01:27,080 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 17:01:27,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27" (1/1) ... [2024-06-21 17:01:27,096 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27" (1/1) ... [2024-06-21 17:01:27,129 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 156 [2024-06-21 17:01:27,130 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 17:01:27,130 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 17:01:27,130 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 17:01:27,130 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 17:01:27,139 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27" (1/1) ... [2024-06-21 17:01:27,139 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27" (1/1) ... [2024-06-21 17:01:27,144 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27" (1/1) ... [2024-06-21 17:01:27,161 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 17:01:27,161 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27" (1/1) ... [2024-06-21 17:01:27,162 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27" (1/1) ... [2024-06-21 17:01:27,169 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27" (1/1) ... [2024-06-21 17:01:27,176 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27" (1/1) ... [2024-06-21 17:01:27,178 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27" (1/1) ... [2024-06-21 17:01:27,179 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27" (1/1) ... [2024-06-21 17:01:27,182 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 17:01:27,183 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 17:01:27,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 17:01:27,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 17:01:27,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27" (1/1) ... [2024-06-21 17:01:27,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 17:01:27,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 17:01:27,204 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) [2024-06-21 17:01:27,230 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 [2024-06-21 17:01:27,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 17:01:27,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 17:01:27,244 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 17:01:27,245 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 17:01:27,245 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 17:01:27,245 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 17:01:27,246 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 17:01:27,246 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 17:01:27,246 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 17:01:27,246 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 17:01:27,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 17:01:27,246 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 17:01:27,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 17:01:27,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 17:01:27,251 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 17:01:27,384 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 17:01:27,386 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 17:01:27,736 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 17:01:27,736 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 17:01:27,854 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 17:01:27,854 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 17:01:27,854 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:01:27 BoogieIcfgContainer [2024-06-21 17:01:27,854 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 17:01:27,856 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 17:01:27,856 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 17:01:27,858 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 17:01:27,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 05:01:25" (1/4) ... [2024-06-21 17:01:27,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d93b286 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 05:01:27, skipping insertion in model container [2024-06-21 17:01:27,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 05:01:26" (2/4) ... [2024-06-21 17:01:27,859 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d93b286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:01:27, skipping insertion in model container [2024-06-21 17:01:27,859 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 05:01:27" (3/4) ... [2024-06-21 17:01:27,860 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d93b286 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 05:01:27, skipping insertion in model container [2024-06-21 17:01:27,860 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 05:01:27" (4/4) ... [2024-06-21 17:01:27,861 INFO L112 eAbstractionObserver]: Analyzing ICFG mix053_tso.oepc.i [2024-06-21 17:01:27,873 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 17:01:27,873 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 17:01:27,873 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 17:01:27,911 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 17:01:27,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 17:01:27,961 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-21 17:01:27,962 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:01:27,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 17:01:27,963 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 17:01:27,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-21 17:01:27,977 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 17:01:27,983 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;@71aed980, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 17:01:27,983 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 17:01:27,987 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 17:01:27,988 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 17:01:27,988 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 17:01:27,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:27,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 17:01:27,989 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:27,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:27,994 INFO L85 PathProgramCache]: Analyzing trace with hash 389701297, now seen corresponding path program 1 times [2024-06-21 17:01:28,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:28,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727202568] [2024-06-21 17:01:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:28,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:28,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:28,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:28,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727202568] [2024-06-21 17:01:28,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727202568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:28,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:28,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 17:01:28,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246909393] [2024-06-21 17:01:28,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:28,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 17:01:28,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:28,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 17:01:28,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 17:01:28,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 17:01:28,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:28,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:28,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 17:01:28,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:30,056 INFO L124 PetriNetUnfolderBase]: 8188/11556 cut-off events. [2024-06-21 17:01:30,056 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-06-21 17:01:30,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23109 conditions, 11556 events. 8188/11556 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 63575 event pairs, 6210 based on Foata normal form. 1/11371 useless extension candidates. Maximal degree in co-relation 23096. Up to 11164 conditions per place. [2024-06-21 17:01:30,118 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 42 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-21 17:01:30,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 225 flow [2024-06-21 17:01:30,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 17:01:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 17:01:30,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-21 17:01:30,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-21 17:01:30,130 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 93 transitions. [2024-06-21 17:01:30,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 225 flow [2024-06-21 17:01:30,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 17:01:30,139 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-21 17:01:30,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-21 17:01:30,144 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-21 17:01:30,144 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-21 17:01:30,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:30,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:30,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:30,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 17:01:30,146 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:30,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:30,147 INFO L85 PathProgramCache]: Analyzing trace with hash 841653080, now seen corresponding path program 1 times [2024-06-21 17:01:30,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:30,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308922436] [2024-06-21 17:01:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:30,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:30,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:30,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:30,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308922436] [2024-06-21 17:01:30,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308922436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:30,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:30,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 17:01:30,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183075072] [2024-06-21 17:01:30,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:30,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 17:01:30,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:30,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 17:01:30,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 17:01:30,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:30,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:30,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:30,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:30,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:31,872 INFO L124 PetriNetUnfolderBase]: 9573/13147 cut-off events. [2024-06-21 17:01:31,872 INFO L125 PetriNetUnfolderBase]: For 2477/2477 co-relation queries the response was YES. [2024-06-21 17:01:31,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29985 conditions, 13147 events. 9573/13147 cut-off events. For 2477/2477 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 69585 event pairs, 6546 based on Foata normal form. 4/13148 useless extension candidates. Maximal degree in co-relation 29973. Up to 12974 conditions per place. [2024-06-21 17:01:31,930 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 53 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-21 17:01:31,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 319 flow [2024-06-21 17:01:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 17:01:31,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 17:01:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-06-21 17:01:31,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2024-06-21 17:01:31,932 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 118 transitions. [2024-06-21 17:01:31,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 319 flow [2024-06-21 17:01:31,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 17:01:31,934 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-21 17:01:31,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-21 17:01:31,935 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-21 17:01:31,945 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-21 17:01:31,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:31,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:31,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:31,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 17:01:31,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:31,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:31,961 INFO L85 PathProgramCache]: Analyzing trace with hash 321443458, now seen corresponding path program 1 times [2024-06-21 17:01:31,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:31,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263842780] [2024-06-21 17:01:31,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:31,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:31,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:32,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:32,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263842780] [2024-06-21 17:01:32,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263842780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:32,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:32,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 17:01:32,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141626766] [2024-06-21 17:01:32,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:32,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 17:01:32,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:32,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 17:01:32,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 17:01:32,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:32,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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) [2024-06-21 17:01:32,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:32,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:32,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:33,805 INFO L124 PetriNetUnfolderBase]: 9591/13184 cut-off events. [2024-06-21 17:01:33,805 INFO L125 PetriNetUnfolderBase]: For 7220/7220 co-relation queries the response was YES. [2024-06-21 17:01:33,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33493 conditions, 13184 events. 9591/13184 cut-off events. For 7220/7220 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 69765 event pairs, 5215 based on Foata normal form. 7/13186 useless extension candidates. Maximal degree in co-relation 33479. Up to 12895 conditions per place. [2024-06-21 17:01:33,862 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 71 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-21 17:01:33,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 535 flow [2024-06-21 17:01:33,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:01:33,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:01:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-21 17:01:33,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-21 17:01:33,864 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 155 transitions. [2024-06-21 17:01:33,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 535 flow [2024-06-21 17:01:33,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 516 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 17:01:33,868 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-21 17:01:33,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-21 17:01:33,869 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-21 17:01:33,869 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-21 17:01:33,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 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) [2024-06-21 17:01:33,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:33,869 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:33,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 17:01:33,870 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:33,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:33,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1390891913, now seen corresponding path program 1 times [2024-06-21 17:01:33,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:33,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982660010] [2024-06-21 17:01:33,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:33,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:34,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:34,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:34,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982660010] [2024-06-21 17:01:34,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982660010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:34,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:34,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:01:34,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735201238] [2024-06-21 17:01:34,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:34,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:01:34,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:01:34,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:01:34,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 17:01:34,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-21 17:01:34,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:34,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 17:01:34,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:35,797 INFO L124 PetriNetUnfolderBase]: 9620/13234 cut-off events. [2024-06-21 17:01:35,797 INFO L125 PetriNetUnfolderBase]: For 17233/17239 co-relation queries the response was YES. [2024-06-21 17:01:35,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39126 conditions, 13234 events. 9620/13234 cut-off events. For 17233/17239 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 70281 event pairs, 4299 based on Foata normal form. 18/13247 useless extension candidates. Maximal degree in co-relation 39109. Up to 12860 conditions per place. [2024-06-21 17:01:35,870 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 78 selfloop transitions, 25 changer transitions 0/110 dead transitions. [2024-06-21 17:01:35,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 680 flow [2024-06-21 17:01:35,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:01:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:01:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-21 17:01:35,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849673202614379 [2024-06-21 17:01:35,872 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 179 transitions. [2024-06-21 17:01:35,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 680 flow [2024-06-21 17:01:35,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 668 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 17:01:35,880 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 385 flow [2024-06-21 17:01:35,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-21 17:01:35,881 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2024-06-21 17:01:35,881 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 385 flow [2024-06-21 17:01:35,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 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) [2024-06-21 17:01:35,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:35,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:35,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 17:01:35,882 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:35,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:35,883 INFO L85 PathProgramCache]: Analyzing trace with hash 214448959, now seen corresponding path program 1 times [2024-06-21 17:01:35,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:35,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109988748] [2024-06-21 17:01:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:35,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:36,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:36,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109988748] [2024-06-21 17:01:36,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109988748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:36,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:36,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:01:36,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351559139] [2024-06-21 17:01:36,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:36,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:01:36,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:36,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:01:36,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:01:36,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:01:36,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-21 17:01:36,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:36,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:01:36,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:37,731 INFO L124 PetriNetUnfolderBase]: 8216/11594 cut-off events. [2024-06-21 17:01:37,732 INFO L125 PetriNetUnfolderBase]: For 21841/21841 co-relation queries the response was YES. [2024-06-21 17:01:37,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37156 conditions, 11594 events. 8216/11594 cut-off events. For 21841/21841 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 63837 event pairs, 4302 based on Foata normal form. 3/11594 useless extension candidates. Maximal degree in co-relation 37135. Up to 11191 conditions per place. [2024-06-21 17:01:37,794 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 66 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-21 17:01:37,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 581 flow [2024-06-21 17:01:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:01:37,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:01:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 17:01:37,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745098039215686 [2024-06-21 17:01:37,796 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 385 flow. Second operand 5 states and 121 transitions. [2024-06-21 17:01:37,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 581 flow [2024-06-21 17:01:37,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 512 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 17:01:37,802 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 347 flow [2024-06-21 17:01:37,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-21 17:01:37,803 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-21 17:01:37,803 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 347 flow [2024-06-21 17:01:37,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 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) [2024-06-21 17:01:37,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:37,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:37,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 17:01:37,804 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:37,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:37,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1950347063, now seen corresponding path program 1 times [2024-06-21 17:01:37,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:37,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453523092] [2024-06-21 17:01:37,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:37,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:38,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:38,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453523092] [2024-06-21 17:01:38,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453523092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:38,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:38,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:01:38,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487637430] [2024-06-21 17:01:38,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:38,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:01:38,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:38,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:01:38,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:01:38,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:01:38,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:38,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:38,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:01:38,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:39,683 INFO L124 PetriNetUnfolderBase]: 8198/11634 cut-off events. [2024-06-21 17:01:39,684 INFO L125 PetriNetUnfolderBase]: For 25269/25269 co-relation queries the response was YES. [2024-06-21 17:01:39,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37682 conditions, 11634 events. 8198/11634 cut-off events. For 25269/25269 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 64377 event pairs, 4090 based on Foata normal form. 6/11637 useless extension candidates. Maximal degree in co-relation 37659. Up to 11137 conditions per place. [2024-06-21 17:01:39,756 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 74 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-21 17:01:39,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 615 flow [2024-06-21 17:01:39,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:01:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:01:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 17:01:39,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738562091503268 [2024-06-21 17:01:39,758 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 347 flow. Second operand 6 states and 145 transitions. [2024-06-21 17:01:39,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 615 flow [2024-06-21 17:01:39,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 586 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 17:01:39,767 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 393 flow [2024-06-21 17:01:39,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-21 17:01:39,768 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 15 predicate places. [2024-06-21 17:01:39,768 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 393 flow [2024-06-21 17:01:39,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:39,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:39,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:39,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 17:01:39,769 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:39,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:39,770 INFO L85 PathProgramCache]: Analyzing trace with hash -336936964, now seen corresponding path program 1 times [2024-06-21 17:01:39,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:39,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428453471] [2024-06-21 17:01:39,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:39,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:40,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:40,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428453471] [2024-06-21 17:01:40,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428453471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:40,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:40,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:01:40,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426409286] [2024-06-21 17:01:40,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:40,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:01:40,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:40,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:01:40,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:01:40,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:01:40,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:40,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:40,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:01:40,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:41,694 INFO L124 PetriNetUnfolderBase]: 9606/13255 cut-off events. [2024-06-21 17:01:41,694 INFO L125 PetriNetUnfolderBase]: For 40303/40315 co-relation queries the response was YES. [2024-06-21 17:01:41,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46540 conditions, 13255 events. 9606/13255 cut-off events. For 40303/40315 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 70435 event pairs, 4983 based on Foata normal form. 14/13264 useless extension candidates. Maximal degree in co-relation 46517. Up to 12914 conditions per place. [2024-06-21 17:01:41,777 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 73 selfloop transitions, 25 changer transitions 0/104 dead transitions. [2024-06-21 17:01:41,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 104 transitions, 732 flow [2024-06-21 17:01:41,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:01:41,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:01:41,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 17:01:41,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869281045751634 [2024-06-21 17:01:41,778 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 393 flow. Second operand 6 states and 149 transitions. [2024-06-21 17:01:41,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 104 transitions, 732 flow [2024-06-21 17:01:41,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 104 transitions, 689 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 17:01:41,790 INFO L231 Difference]: Finished difference. Result has 71 places, 74 transitions, 446 flow [2024-06-21 17:01:41,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=446, PETRI_PLACES=71, PETRI_TRANSITIONS=74} [2024-06-21 17:01:41,790 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-06-21 17:01:41,790 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 74 transitions, 446 flow [2024-06-21 17:01:41,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:41,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:41,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:41,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 17:01:41,791 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:41,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:41,792 INFO L85 PathProgramCache]: Analyzing trace with hash -72935074, now seen corresponding path program 2 times [2024-06-21 17:01:41,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:41,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796970113] [2024-06-21 17:01:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:41,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:42,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:42,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796970113] [2024-06-21 17:01:42,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796970113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:42,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:42,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:01:42,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647956519] [2024-06-21 17:01:42,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:42,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:01:42,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:42,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:01:42,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:01:42,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:01:42,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 74 transitions, 446 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:42,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:42,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:01:42,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:43,618 INFO L124 PetriNetUnfolderBase]: 9582/13207 cut-off events. [2024-06-21 17:01:43,619 INFO L125 PetriNetUnfolderBase]: For 47027/47027 co-relation queries the response was YES. [2024-06-21 17:01:43,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47482 conditions, 13207 events. 9582/13207 cut-off events. For 47027/47027 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 70067 event pairs, 5003 based on Foata normal form. 3/13198 useless extension candidates. Maximal degree in co-relation 47458. Up to 12884 conditions per place. [2024-06-21 17:01:43,699 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 66 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-21 17:01:43,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 98 transitions, 692 flow [2024-06-21 17:01:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:01:43,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:01:43,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 17:01:43,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-21 17:01:43,701 INFO L175 Difference]: Start difference. First operand has 71 places, 74 transitions, 446 flow. Second operand 6 states and 144 transitions. [2024-06-21 17:01:43,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 98 transitions, 692 flow [2024-06-21 17:01:43,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 649 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 17:01:43,713 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 466 flow [2024-06-21 17:01:43,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=466, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-21 17:01:43,713 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 20 predicate places. [2024-06-21 17:01:43,714 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 466 flow [2024-06-21 17:01:43,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:43,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:43,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:43,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 17:01:43,714 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:43,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:43,715 INFO L85 PathProgramCache]: Analyzing trace with hash 847064636, now seen corresponding path program 1 times [2024-06-21 17:01:43,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:43,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935871134] [2024-06-21 17:01:43,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:43,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:44,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:44,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:44,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935871134] [2024-06-21 17:01:44,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935871134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:44,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:44,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:44,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578130593] [2024-06-21 17:01:44,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:44,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:44,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:44,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:44,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:44,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:01:44,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 466 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:44,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:44,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:01:44,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:45,695 INFO L124 PetriNetUnfolderBase]: 9948/13711 cut-off events. [2024-06-21 17:01:45,696 INFO L125 PetriNetUnfolderBase]: For 57909/57918 co-relation queries the response was YES. [2024-06-21 17:01:45,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50876 conditions, 13711 events. 9948/13711 cut-off events. For 57909/57918 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 72743 event pairs, 4405 based on Foata normal form. 15/13719 useless extension candidates. Maximal degree in co-relation 50851. Up to 12950 conditions per place. [2024-06-21 17:01:45,770 INFO L140 encePairwiseOnDemand]: 35/51 looper letters, 103 selfloop transitions, 55 changer transitions 0/164 dead transitions. [2024-06-21 17:01:45,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 164 transitions, 1342 flow [2024-06-21 17:01:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:01:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:01:45,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 17:01:45,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073529411764706 [2024-06-21 17:01:45,772 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 466 flow. Second operand 8 states and 207 transitions. [2024-06-21 17:01:45,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 164 transitions, 1342 flow [2024-06-21 17:01:45,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 164 transitions, 1179 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 17:01:45,793 INFO L231 Difference]: Finished difference. Result has 79 places, 107 transitions, 787 flow [2024-06-21 17:01:45,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=787, PETRI_PLACES=79, PETRI_TRANSITIONS=107} [2024-06-21 17:01:45,794 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-06-21 17:01:45,794 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 107 transitions, 787 flow [2024-06-21 17:01:45,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:45,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:45,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:45,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 17:01:45,795 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:45,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:45,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1855109622, now seen corresponding path program 2 times [2024-06-21 17:01:45,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:45,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119638942] [2024-06-21 17:01:45,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:45,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:46,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:46,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:46,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119638942] [2024-06-21 17:01:46,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119638942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:46,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:46,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:46,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680469064] [2024-06-21 17:01:46,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:46,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:46,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:46,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:46,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:46,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:01:46,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 107 transitions, 787 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:46,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:46,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:01:46,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:47,967 INFO L124 PetriNetUnfolderBase]: 10108/13923 cut-off events. [2024-06-21 17:01:47,967 INFO L125 PetriNetUnfolderBase]: For 76337/76349 co-relation queries the response was YES. [2024-06-21 17:01:47,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56688 conditions, 13923 events. 10108/13923 cut-off events. For 76337/76349 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73589 event pairs, 4444 based on Foata normal form. 26/13942 useless extension candidates. Maximal degree in co-relation 56659. Up to 13062 conditions per place. [2024-06-21 17:01:48,041 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 89 selfloop transitions, 65 changer transitions 0/160 dead transitions. [2024-06-21 17:01:48,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 160 transitions, 1393 flow [2024-06-21 17:01:48,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 17:01:48,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957983193277311 [2024-06-21 17:01:48,044 INFO L175 Difference]: Start difference. First operand has 79 places, 107 transitions, 787 flow. Second operand 7 states and 177 transitions. [2024-06-21 17:01:48,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 160 transitions, 1393 flow [2024-06-21 17:01:48,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 160 transitions, 1352 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 17:01:48,081 INFO L231 Difference]: Finished difference. Result has 84 places, 116 transitions, 996 flow [2024-06-21 17:01:48,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=746, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=996, PETRI_PLACES=84, PETRI_TRANSITIONS=116} [2024-06-21 17:01:48,082 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-21 17:01:48,082 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 116 transitions, 996 flow [2024-06-21 17:01:48,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:48,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:48,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:48,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 17:01:48,083 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:48,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:48,084 INFO L85 PathProgramCache]: Analyzing trace with hash 2033981672, now seen corresponding path program 3 times [2024-06-21 17:01:48,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:48,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011090158] [2024-06-21 17:01:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:48,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:48,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:48,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:48,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011090158] [2024-06-21 17:01:48,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011090158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:48,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:48,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:48,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971417382] [2024-06-21 17:01:48,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:48,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:48,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:48,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:48,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:48,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:01:48,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 116 transitions, 996 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:48,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:48,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:01:48,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:50,393 INFO L124 PetriNetUnfolderBase]: 10188/14045 cut-off events. [2024-06-21 17:01:50,393 INFO L125 PetriNetUnfolderBase]: For 90099/90103 co-relation queries the response was YES. [2024-06-21 17:01:50,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59794 conditions, 14045 events. 10188/14045 cut-off events. For 90099/90103 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 74234 event pairs, 4442 based on Foata normal form. 12/14032 useless extension candidates. Maximal degree in co-relation 59763. Up to 13104 conditions per place. [2024-06-21 17:01:50,479 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 90 selfloop transitions, 79 changer transitions 0/175 dead transitions. [2024-06-21 17:01:50,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 175 transitions, 1792 flow [2024-06-21 17:01:50,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:50,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:50,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 17:01:50,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014005602240896 [2024-06-21 17:01:50,481 INFO L175 Difference]: Start difference. First operand has 84 places, 116 transitions, 996 flow. Second operand 7 states and 179 transitions. [2024-06-21 17:01:50,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 175 transitions, 1792 flow [2024-06-21 17:01:50,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 175 transitions, 1623 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 17:01:50,539 INFO L231 Difference]: Finished difference. Result has 87 places, 130 transitions, 1205 flow [2024-06-21 17:01:50,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1205, PETRI_PLACES=87, PETRI_TRANSITIONS=130} [2024-06-21 17:01:50,540 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 33 predicate places. [2024-06-21 17:01:50,540 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 130 transitions, 1205 flow [2024-06-21 17:01:50,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:50,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:50,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:50,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 17:01:50,541 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:50,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:50,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1677740952, now seen corresponding path program 4 times [2024-06-21 17:01:50,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:50,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831672176] [2024-06-21 17:01:50,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:50,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:50,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:51,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:51,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:51,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831672176] [2024-06-21 17:01:51,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831672176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:51,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:51,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:51,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6652986] [2024-06-21 17:01:51,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:51,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:51,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:51,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:51,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:51,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:01:51,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 130 transitions, 1205 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:51,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:51,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:01:51,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:53,215 INFO L124 PetriNetUnfolderBase]: 10156/13991 cut-off events. [2024-06-21 17:01:53,216 INFO L125 PetriNetUnfolderBase]: For 90531/90541 co-relation queries the response was YES. [2024-06-21 17:01:53,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59247 conditions, 13991 events. 10156/13991 cut-off events. For 90531/90541 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 73965 event pairs, 4424 based on Foata normal form. 18/13985 useless extension candidates. Maximal degree in co-relation 59215. Up to 13087 conditions per place. [2024-06-21 17:01:53,322 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 85 selfloop transitions, 81 changer transitions 0/172 dead transitions. [2024-06-21 17:01:53,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 172 transitions, 1739 flow [2024-06-21 17:01:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:53,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 17:01:53,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 17:01:53,325 INFO L175 Difference]: Start difference. First operand has 87 places, 130 transitions, 1205 flow. Second operand 7 states and 175 transitions. [2024-06-21 17:01:53,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 172 transitions, 1739 flow [2024-06-21 17:01:53,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 172 transitions, 1608 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-21 17:01:53,417 INFO L231 Difference]: Finished difference. Result has 92 places, 130 transitions, 1250 flow [2024-06-21 17:01:53,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1074, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1250, PETRI_PLACES=92, PETRI_TRANSITIONS=130} [2024-06-21 17:01:53,419 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-21 17:01:53,419 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 130 transitions, 1250 flow [2024-06-21 17:01:53,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:53,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:53,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:53,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 17:01:53,420 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:53,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:53,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1677732024, now seen corresponding path program 1 times [2024-06-21 17:01:53,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:53,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301110299] [2024-06-21 17:01:53,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:53,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:54,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:54,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:54,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301110299] [2024-06-21 17:01:54,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301110299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:54,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:54,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:01:54,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884252677] [2024-06-21 17:01:54,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:54,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:01:54,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:54,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:01:54,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:01:54,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:01:54,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 130 transitions, 1250 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:54,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:54,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:01:54,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:56,009 INFO L124 PetriNetUnfolderBase]: 8746/12331 cut-off events. [2024-06-21 17:01:56,009 INFO L125 PetriNetUnfolderBase]: For 85074/85076 co-relation queries the response was YES. [2024-06-21 17:01:56,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52926 conditions, 12331 events. 8746/12331 cut-off events. For 85074/85076 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 67609 event pairs, 3825 based on Foata normal form. 6/12334 useless extension candidates. Maximal degree in co-relation 52891. Up to 11846 conditions per place. [2024-06-21 17:01:56,089 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 142 selfloop transitions, 17 changer transitions 0/166 dead transitions. [2024-06-21 17:01:56,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 166 transitions, 1706 flow [2024-06-21 17:01:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:01:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:01:56,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 17:01:56,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-21 17:01:56,092 INFO L175 Difference]: Start difference. First operand has 92 places, 130 transitions, 1250 flow. Second operand 7 states and 168 transitions. [2024-06-21 17:01:56,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 166 transitions, 1706 flow [2024-06-21 17:01:56,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 166 transitions, 1499 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 17:01:56,155 INFO L231 Difference]: Finished difference. Result has 92 places, 133 transitions, 1129 flow [2024-06-21 17:01:56,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1129, PETRI_PLACES=92, PETRI_TRANSITIONS=133} [2024-06-21 17:01:56,156 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-21 17:01:56,157 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 133 transitions, 1129 flow [2024-06-21 17:01:56,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:56,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:56,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:56,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 17:01:56,157 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:56,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:56,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1519240989, now seen corresponding path program 1 times [2024-06-21 17:01:56,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:56,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348014111] [2024-06-21 17:01:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:56,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:56,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:56,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348014111] [2024-06-21 17:01:56,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348014111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:56,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:56,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 17:01:56,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054105559] [2024-06-21 17:01:56,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:56,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 17:01:56,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:56,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 17:01:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 17:01:56,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:01:56,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 133 transitions, 1129 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-21 17:01:56,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:56,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:01:56,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:01:57,876 INFO L124 PetriNetUnfolderBase]: 8739/12560 cut-off events. [2024-06-21 17:01:57,877 INFO L125 PetriNetUnfolderBase]: For 94771/94773 co-relation queries the response was YES. [2024-06-21 17:01:57,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54446 conditions, 12560 events. 8739/12560 cut-off events. For 94771/94773 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 70156 event pairs, 3988 based on Foata normal form. 2/12559 useless extension candidates. Maximal degree in co-relation 54411. Up to 11903 conditions per place. [2024-06-21 17:01:57,966 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 134 selfloop transitions, 10 changer transitions 0/151 dead transitions. [2024-06-21 17:01:57,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 151 transitions, 1499 flow [2024-06-21 17:01:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 17:01:57,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 17:01:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-21 17:01:57,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2024-06-21 17:01:57,968 INFO L175 Difference]: Start difference. First operand has 92 places, 133 transitions, 1129 flow. Second operand 5 states and 117 transitions. [2024-06-21 17:01:57,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 151 transitions, 1499 flow [2024-06-21 17:01:58,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 151 transitions, 1439 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 17:01:58,046 INFO L231 Difference]: Finished difference. Result has 92 places, 137 transitions, 1144 flow [2024-06-21 17:01:58,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1144, PETRI_PLACES=92, PETRI_TRANSITIONS=137} [2024-06-21 17:01:58,047 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 38 predicate places. [2024-06-21 17:01:58,047 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 137 transitions, 1144 flow [2024-06-21 17:01:58,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 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) [2024-06-21 17:01:58,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:01:58,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:01:58,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 17:01:58,048 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:01:58,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:01:58,048 INFO L85 PathProgramCache]: Analyzing trace with hash 2142980314, now seen corresponding path program 1 times [2024-06-21 17:01:58,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:01:58,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124322654] [2024-06-21 17:01:58,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:01:58,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:01:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:01:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:01:58,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:01:58,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124322654] [2024-06-21 17:01:58,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124322654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:01:58,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:01:58,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:01:58,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724628826] [2024-06-21 17:01:58,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:01:58,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:01:58,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:01:58,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:01:58,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:01:58,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:01:58,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 137 transitions, 1144 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:01:58,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:01:58,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:01:58,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:00,398 INFO L124 PetriNetUnfolderBase]: 10222/14132 cut-off events. [2024-06-21 17:02:00,398 INFO L125 PetriNetUnfolderBase]: For 130587/130610 co-relation queries the response was YES. [2024-06-21 17:02:00,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65282 conditions, 14132 events. 10222/14132 cut-off events. For 130587/130610 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 74794 event pairs, 4407 based on Foata normal form. 30/14155 useless extension candidates. Maximal degree in co-relation 65246. Up to 13133 conditions per place. [2024-06-21 17:02:00,500 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 100 selfloop transitions, 86 changer transitions 0/192 dead transitions. [2024-06-21 17:02:00,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 192 transitions, 1858 flow [2024-06-21 17:02:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:02:00,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:02:00,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 17:02:00,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-21 17:02:00,502 INFO L175 Difference]: Start difference. First operand has 92 places, 137 transitions, 1144 flow. Second operand 7 states and 181 transitions. [2024-06-21 17:02:00,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 192 transitions, 1858 flow [2024-06-21 17:02:00,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 192 transitions, 1813 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 17:02:00,563 INFO L231 Difference]: Finished difference. Result has 96 places, 145 transitions, 1398 flow [2024-06-21 17:02:00,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1099, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1398, PETRI_PLACES=96, PETRI_TRANSITIONS=145} [2024-06-21 17:02:00,564 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2024-06-21 17:02:00,564 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 145 transitions, 1398 flow [2024-06-21 17:02:00,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:00,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:00,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:00,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 17:02:00,565 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:00,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:00,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1569188622, now seen corresponding path program 2 times [2024-06-21 17:02:00,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:00,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164469339] [2024-06-21 17:02:00,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:00,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:01,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:01,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164469339] [2024-06-21 17:02:01,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164469339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:01,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:01,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:02:01,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527672398] [2024-06-21 17:02:01,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:01,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:02:01,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:01,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:02:01,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:02:01,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:01,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 145 transitions, 1398 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:01,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:01,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:01,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:02,821 INFO L124 PetriNetUnfolderBase]: 10298/14238 cut-off events. [2024-06-21 17:02:02,821 INFO L125 PetriNetUnfolderBase]: For 147607/147632 co-relation queries the response was YES. [2024-06-21 17:02:02,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67817 conditions, 14238 events. 10298/14238 cut-off events. For 147607/147632 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 75387 event pairs, 4379 based on Foata normal form. 30/14261 useless extension candidates. Maximal degree in co-relation 67780. Up to 13200 conditions per place. [2024-06-21 17:02:02,934 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 101 selfloop transitions, 90 changer transitions 0/197 dead transitions. [2024-06-21 17:02:02,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 197 transitions, 2132 flow [2024-06-21 17:02:02,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:02:02,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:02:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 17:02:02,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4957983193277311 [2024-06-21 17:02:02,936 INFO L175 Difference]: Start difference. First operand has 96 places, 145 transitions, 1398 flow. Second operand 7 states and 177 transitions. [2024-06-21 17:02:02,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 197 transitions, 2132 flow [2024-06-21 17:02:03,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 197 transitions, 1828 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 17:02:03,045 INFO L231 Difference]: Finished difference. Result has 97 places, 153 transitions, 1419 flow [2024-06-21 17:02:03,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1419, PETRI_PLACES=97, PETRI_TRANSITIONS=153} [2024-06-21 17:02:03,046 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 43 predicate places. [2024-06-21 17:02:03,046 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 153 transitions, 1419 flow [2024-06-21 17:02:03,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:03,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:03,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:03,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 17:02:03,047 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:03,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:03,047 INFO L85 PathProgramCache]: Analyzing trace with hash 331646868, now seen corresponding path program 3 times [2024-06-21 17:02:03,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:03,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875629758] [2024-06-21 17:02:03,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:03,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:03,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:03,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875629758] [2024-06-21 17:02:03,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875629758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:03,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:03,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:02:03,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670123264] [2024-06-21 17:02:03,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:03,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:02:03,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:03,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:02:03,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:02:03,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:03,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 153 transitions, 1419 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:03,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:03,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:03,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:05,296 INFO L124 PetriNetUnfolderBase]: 10266/14200 cut-off events. [2024-06-21 17:02:05,296 INFO L125 PetriNetUnfolderBase]: For 158479/158527 co-relation queries the response was YES. [2024-06-21 17:02:05,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68227 conditions, 14200 events. 10266/14200 cut-off events. For 158479/158527 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 75302 event pairs, 4403 based on Foata normal form. 42/14211 useless extension candidates. Maximal degree in co-relation 68190. Up to 13173 conditions per place. [2024-06-21 17:02:05,400 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 98 selfloop transitions, 87 changer transitions 0/191 dead transitions. [2024-06-21 17:02:05,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 191 transitions, 1921 flow [2024-06-21 17:02:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:02:05,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:02:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 17:02:05,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4733893557422969 [2024-06-21 17:02:05,401 INFO L175 Difference]: Start difference. First operand has 97 places, 153 transitions, 1419 flow. Second operand 7 states and 169 transitions. [2024-06-21 17:02:05,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 191 transitions, 1921 flow [2024-06-21 17:02:05,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 191 transitions, 1712 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 17:02:05,542 INFO L231 Difference]: Finished difference. Result has 100 places, 153 transitions, 1399 flow [2024-06-21 17:02:05,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1399, PETRI_PLACES=100, PETRI_TRANSITIONS=153} [2024-06-21 17:02:05,542 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 46 predicate places. [2024-06-21 17:02:05,543 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 153 transitions, 1399 flow [2024-06-21 17:02:05,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:05,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:05,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:05,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 17:02:05,543 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:05,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:05,544 INFO L85 PathProgramCache]: Analyzing trace with hash 424650733, now seen corresponding path program 1 times [2024-06-21 17:02:05,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:05,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94239418] [2024-06-21 17:02:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:05,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:06,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:06,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:06,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94239418] [2024-06-21 17:02:06,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94239418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:06,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:06,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:02:06,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104857439] [2024-06-21 17:02:06,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:06,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:02:06,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:06,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:02:06,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:02:06,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:06,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 153 transitions, 1399 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:06,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:06,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:06,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:07,792 INFO L124 PetriNetUnfolderBase]: 10302/14244 cut-off events. [2024-06-21 17:02:07,793 INFO L125 PetriNetUnfolderBase]: For 173915/173935 co-relation queries the response was YES. [2024-06-21 17:02:07,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69308 conditions, 14244 events. 10302/14244 cut-off events. For 173915/173935 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 75588 event pairs, 3806 based on Foata normal form. 22/14261 useless extension candidates. Maximal degree in co-relation 69270. Up to 13587 conditions per place. [2024-06-21 17:02:07,909 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 147 selfloop transitions, 46 changer transitions 0/199 dead transitions. [2024-06-21 17:02:07,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 199 transitions, 2085 flow [2024-06-21 17:02:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:02:07,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:02:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 17:02:07,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789915966386555 [2024-06-21 17:02:07,911 INFO L175 Difference]: Start difference. First operand has 100 places, 153 transitions, 1399 flow. Second operand 7 states and 171 transitions. [2024-06-21 17:02:07,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 199 transitions, 2085 flow [2024-06-21 17:02:08,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 199 transitions, 1831 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 17:02:08,033 INFO L231 Difference]: Finished difference. Result has 100 places, 159 transitions, 1333 flow [2024-06-21 17:02:08,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1333, PETRI_PLACES=100, PETRI_TRANSITIONS=159} [2024-06-21 17:02:08,034 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 46 predicate places. [2024-06-21 17:02:08,034 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 159 transitions, 1333 flow [2024-06-21 17:02:08,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:08,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:08,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:08,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 17:02:08,035 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:08,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:08,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1997847635, now seen corresponding path program 2 times [2024-06-21 17:02:08,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:08,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890959214] [2024-06-21 17:02:08,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:08,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:08,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:08,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890959214] [2024-06-21 17:02:08,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890959214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:08,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:08,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:02:08,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373894087] [2024-06-21 17:02:08,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:08,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:02:08,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:02:08,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:02:08,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:08,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 159 transitions, 1333 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:08,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:08,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:08,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:10,264 INFO L124 PetriNetUnfolderBase]: 10287/14222 cut-off events. [2024-06-21 17:02:10,265 INFO L125 PetriNetUnfolderBase]: For 193842/193854 co-relation queries the response was YES. [2024-06-21 17:02:10,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70988 conditions, 14222 events. 10287/14222 cut-off events. For 193842/193854 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 75483 event pairs, 4473 based on Foata normal form. 14/14231 useless extension candidates. Maximal degree in co-relation 70949. Up to 13702 conditions per place. [2024-06-21 17:02:10,365 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 146 selfloop transitions, 45 changer transitions 0/197 dead transitions. [2024-06-21 17:02:10,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 197 transitions, 1845 flow [2024-06-21 17:02:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:02:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:02:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 17:02:10,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-21 17:02:10,367 INFO L175 Difference]: Start difference. First operand has 100 places, 159 transitions, 1333 flow. Second operand 7 states and 168 transitions. [2024-06-21 17:02:10,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 197 transitions, 1845 flow [2024-06-21 17:02:10,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 197 transitions, 1744 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 17:02:10,497 INFO L231 Difference]: Finished difference. Result has 104 places, 159 transitions, 1334 flow [2024-06-21 17:02:10,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1334, PETRI_PLACES=104, PETRI_TRANSITIONS=159} [2024-06-21 17:02:10,497 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 50 predicate places. [2024-06-21 17:02:10,498 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 159 transitions, 1334 flow [2024-06-21 17:02:10,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:10,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:10,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:10,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 17:02:10,498 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:10,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:10,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1882371767, now seen corresponding path program 1 times [2024-06-21 17:02:10,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:10,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189526620] [2024-06-21 17:02:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:10,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:11,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:11,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189526620] [2024-06-21 17:02:11,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189526620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:11,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:11,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:02:11,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193570877] [2024-06-21 17:02:11,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:11,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:02:11,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:11,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:02:11,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:02:11,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:11,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 159 transitions, 1334 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:11,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:11,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:11,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:13,355 INFO L124 PetriNetUnfolderBase]: 10487/14508 cut-off events. [2024-06-21 17:02:13,355 INFO L125 PetriNetUnfolderBase]: For 221330/221345 co-relation queries the response was YES. [2024-06-21 17:02:13,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73604 conditions, 14508 events. 10487/14508 cut-off events. For 221330/221345 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77350 event pairs, 4088 based on Foata normal form. 44/14545 useless extension candidates. Maximal degree in co-relation 73563. Up to 13216 conditions per place. [2024-06-21 17:02:13,450 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 112 selfloop transitions, 96 changer transitions 0/214 dead transitions. [2024-06-21 17:02:13,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 214 transitions, 1970 flow [2024-06-21 17:02:13,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:13,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 17:02:13,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 17:02:13,453 INFO L175 Difference]: Start difference. First operand has 104 places, 159 transitions, 1334 flow. Second operand 8 states and 200 transitions. [2024-06-21 17:02:13,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 214 transitions, 1970 flow [2024-06-21 17:02:13,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 214 transitions, 1868 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 17:02:13,590 INFO L231 Difference]: Finished difference. Result has 106 places, 162 transitions, 1491 flow [2024-06-21 17:02:13,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1232, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1491, PETRI_PLACES=106, PETRI_TRANSITIONS=162} [2024-06-21 17:02:13,591 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 52 predicate places. [2024-06-21 17:02:13,591 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 162 transitions, 1491 flow [2024-06-21 17:02:13,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:13,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:13,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:13,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 17:02:13,592 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:13,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:13,592 INFO L85 PathProgramCache]: Analyzing trace with hash -298647906, now seen corresponding path program 1 times [2024-06-21 17:02:13,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:13,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697364648] [2024-06-21 17:02:13,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:13,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:13,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:14,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:14,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697364648] [2024-06-21 17:02:14,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697364648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:14,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:14,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:02:14,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002067599] [2024-06-21 17:02:14,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:14,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:02:14,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:14,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:02:14,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:02:14,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:14,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 162 transitions, 1491 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:14,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:14,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:14,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:15,652 INFO L124 PetriNetUnfolderBase]: 10503/14555 cut-off events. [2024-06-21 17:02:15,652 INFO L125 PetriNetUnfolderBase]: For 242232/242240 co-relation queries the response was YES. [2024-06-21 17:02:15,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76963 conditions, 14555 events. 10503/14555 cut-off events. For 242232/242240 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77805 event pairs, 4466 based on Foata normal form. 10/14562 useless extension candidates. Maximal degree in co-relation 76921. Up to 14242 conditions per place. [2024-06-21 17:02:15,759 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 169 selfloop transitions, 17 changer transitions 0/192 dead transitions. [2024-06-21 17:02:15,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 192 transitions, 2001 flow [2024-06-21 17:02:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:02:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:02:15,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 17:02:15,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-06-21 17:02:15,762 INFO L175 Difference]: Start difference. First operand has 106 places, 162 transitions, 1491 flow. Second operand 6 states and 138 transitions. [2024-06-21 17:02:15,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 192 transitions, 2001 flow [2024-06-21 17:02:15,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 192 transitions, 1790 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 17:02:15,919 INFO L231 Difference]: Finished difference. Result has 106 places, 166 transitions, 1380 flow [2024-06-21 17:02:15,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1280, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1380, PETRI_PLACES=106, PETRI_TRANSITIONS=166} [2024-06-21 17:02:15,920 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 52 predicate places. [2024-06-21 17:02:15,920 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 166 transitions, 1380 flow [2024-06-21 17:02:15,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:15,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:15,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:15,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 17:02:15,921 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:15,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:15,922 INFO L85 PathProgramCache]: Analyzing trace with hash -183225305, now seen corresponding path program 2 times [2024-06-21 17:02:15,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:15,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278949373] [2024-06-21 17:02:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:15,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:16,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:16,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278949373] [2024-06-21 17:02:16,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278949373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:16,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:16,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:02:16,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684996161] [2024-06-21 17:02:16,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:16,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:02:16,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:16,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:02:16,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:02:17,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:17,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 166 transitions, 1380 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:17,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:17,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:17,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:18,752 INFO L124 PetriNetUnfolderBase]: 10539/14574 cut-off events. [2024-06-21 17:02:18,752 INFO L125 PetriNetUnfolderBase]: For 265407/265411 co-relation queries the response was YES. [2024-06-21 17:02:18,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79226 conditions, 14574 events. 10539/14574 cut-off events. For 265407/265411 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77599 event pairs, 4118 based on Foata normal form. 8/14545 useless extension candidates. Maximal degree in co-relation 79183. Up to 13537 conditions per place. [2024-06-21 17:02:18,872 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 112 selfloop transitions, 98 changer transitions 0/216 dead transitions. [2024-06-21 17:02:18,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 216 transitions, 2014 flow [2024-06-21 17:02:18,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:18,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 17:02:18,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47794117647058826 [2024-06-21 17:02:18,874 INFO L175 Difference]: Start difference. First operand has 106 places, 166 transitions, 1380 flow. Second operand 8 states and 195 transitions. [2024-06-21 17:02:18,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 216 transitions, 2014 flow [2024-06-21 17:02:19,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 216 transitions, 1946 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 17:02:19,071 INFO L231 Difference]: Finished difference. Result has 110 places, 169 transitions, 1581 flow [2024-06-21 17:02:19,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1581, PETRI_PLACES=110, PETRI_TRANSITIONS=169} [2024-06-21 17:02:19,072 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 56 predicate places. [2024-06-21 17:02:19,072 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 169 transitions, 1581 flow [2024-06-21 17:02:19,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:19,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:19,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:19,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 17:02:19,072 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:19,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:19,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1687990199, now seen corresponding path program 3 times [2024-06-21 17:02:19,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:19,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045370377] [2024-06-21 17:02:19,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:19,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:20,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:20,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045370377] [2024-06-21 17:02:20,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045370377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:20,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:20,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:02:20,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70294718] [2024-06-21 17:02:20,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:20,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:02:20,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:20,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:02:20,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:02:20,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:20,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 169 transitions, 1581 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:20,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:20,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:20,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:22,041 INFO L124 PetriNetUnfolderBase]: 10575/14630 cut-off events. [2024-06-21 17:02:22,041 INFO L125 PetriNetUnfolderBase]: For 296384/296392 co-relation queries the response was YES. [2024-06-21 17:02:22,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82973 conditions, 14630 events. 10575/14630 cut-off events. For 296384/296392 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 78062 event pairs, 4102 based on Foata normal form. 12/14605 useless extension candidates. Maximal degree in co-relation 82929. Up to 13589 conditions per place. [2024-06-21 17:02:22,151 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 113 selfloop transitions, 100 changer transitions 0/219 dead transitions. [2024-06-21 17:02:22,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 219 transitions, 2229 flow [2024-06-21 17:02:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:22,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:22,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 17:02:22,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47549019607843135 [2024-06-21 17:02:22,153 INFO L175 Difference]: Start difference. First operand has 110 places, 169 transitions, 1581 flow. Second operand 8 states and 194 transitions. [2024-06-21 17:02:22,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 219 transitions, 2229 flow [2024-06-21 17:02:22,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 219 transitions, 1988 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 17:02:22,306 INFO L231 Difference]: Finished difference. Result has 112 places, 172 transitions, 1619 flow [2024-06-21 17:02:22,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1619, PETRI_PLACES=112, PETRI_TRANSITIONS=172} [2024-06-21 17:02:22,307 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 58 predicate places. [2024-06-21 17:02:22,307 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 172 transitions, 1619 flow [2024-06-21 17:02:22,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:22,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:22,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:22,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 17:02:22,308 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:22,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:22,308 INFO L85 PathProgramCache]: Analyzing trace with hash 719661657, now seen corresponding path program 4 times [2024-06-21 17:02:22,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:22,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105451448] [2024-06-21 17:02:22,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:22,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:23,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:23,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105451448] [2024-06-21 17:02:23,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105451448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:23,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:23,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:02:23,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791659576] [2024-06-21 17:02:23,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:23,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:02:23,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:23,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:02:23,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:02:23,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:23,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 172 transitions, 1619 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:23,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:23,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:23,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:25,151 INFO L124 PetriNetUnfolderBase]: 10560/14597 cut-off events. [2024-06-21 17:02:25,151 INFO L125 PetriNetUnfolderBase]: For 326392/326400 co-relation queries the response was YES. [2024-06-21 17:02:25,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85145 conditions, 14597 events. 10560/14597 cut-off events. For 326392/326400 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 77584 event pairs, 3796 based on Foata normal form. 12/14572 useless extension candidates. Maximal degree in co-relation 85100. Up to 13180 conditions per place. [2024-06-21 17:02:25,281 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 108 selfloop transitions, 111 changer transitions 0/225 dead transitions. [2024-06-21 17:02:25,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 225 transitions, 2293 flow [2024-06-21 17:02:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:25,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:25,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 17:02:25,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4852941176470588 [2024-06-21 17:02:25,283 INFO L175 Difference]: Start difference. First operand has 112 places, 172 transitions, 1619 flow. Second operand 8 states and 198 transitions. [2024-06-21 17:02:25,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 225 transitions, 2293 flow [2024-06-21 17:02:25,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 225 transitions, 2042 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:02:25,525 INFO L231 Difference]: Finished difference. Result has 114 places, 175 transitions, 1674 flow [2024-06-21 17:02:25,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1368, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1674, PETRI_PLACES=114, PETRI_TRANSITIONS=175} [2024-06-21 17:02:25,526 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 60 predicate places. [2024-06-21 17:02:25,526 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 175 transitions, 1674 flow [2024-06-21 17:02:25,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:25,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:25,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:25,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 17:02:25,526 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:25,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:25,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1738954716, now seen corresponding path program 2 times [2024-06-21 17:02:25,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:25,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802541665] [2024-06-21 17:02:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:25,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:26,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:26,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:26,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802541665] [2024-06-21 17:02:26,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802541665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:26,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:26,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:02:26,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272612707] [2024-06-21 17:02:26,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:26,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:02:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:26,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:02:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:02:26,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:26,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 175 transitions, 1674 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:26,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:26,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:26,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:27,663 INFO L124 PetriNetUnfolderBase]: 10553/14635 cut-off events. [2024-06-21 17:02:27,663 INFO L125 PetriNetUnfolderBase]: For 356515/356539 co-relation queries the response was YES. [2024-06-21 17:02:27,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87600 conditions, 14635 events. 10553/14635 cut-off events. For 356515/356539 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 78288 event pairs, 4457 based on Foata normal form. 18/14644 useless extension candidates. Maximal degree in co-relation 87554. Up to 14298 conditions per place. [2024-06-21 17:02:27,791 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 170 selfloop transitions, 24 changer transitions 0/200 dead transitions. [2024-06-21 17:02:27,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 200 transitions, 2204 flow [2024-06-21 17:02:27,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:02:27,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:02:27,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 17:02:27,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43790849673202614 [2024-06-21 17:02:27,793 INFO L175 Difference]: Start difference. First operand has 114 places, 175 transitions, 1674 flow. Second operand 6 states and 134 transitions. [2024-06-21 17:02:27,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 200 transitions, 2204 flow [2024-06-21 17:02:28,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 200 transitions, 1924 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 17:02:28,038 INFO L231 Difference]: Finished difference. Result has 114 places, 179 transitions, 1527 flow [2024-06-21 17:02:28,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1527, PETRI_PLACES=114, PETRI_TRANSITIONS=179} [2024-06-21 17:02:28,038 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 60 predicate places. [2024-06-21 17:02:28,038 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 179 transitions, 1527 flow [2024-06-21 17:02:28,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:28,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:28,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:28,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 17:02:28,039 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:28,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:28,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1744662684, now seen corresponding path program 1 times [2024-06-21 17:02:28,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:28,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441703510] [2024-06-21 17:02:28,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:28,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:28,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:28,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441703510] [2024-06-21 17:02:28,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441703510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:28,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:28,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:02:28,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938095868] [2024-06-21 17:02:28,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:28,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:02:28,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:28,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:02:28,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:02:28,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:02:28,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 179 transitions, 1527 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:28,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:28,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:02:28,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:29,972 INFO L124 PetriNetUnfolderBase]: 9174/13151 cut-off events. [2024-06-21 17:02:29,973 INFO L125 PetriNetUnfolderBase]: For 323437/323439 co-relation queries the response was YES. [2024-06-21 17:02:30,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78982 conditions, 13151 events. 9174/13151 cut-off events. For 323437/323439 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 73631 event pairs, 3774 based on Foata normal form. 2/13150 useless extension candidates. Maximal degree in co-relation 78935. Up to 12511 conditions per place. [2024-06-21 17:02:30,087 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 183 selfloop transitions, 14 changer transitions 0/204 dead transitions. [2024-06-21 17:02:30,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 204 transitions, 2047 flow [2024-06-21 17:02:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:02:30,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:02:30,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 17:02:30,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45751633986928103 [2024-06-21 17:02:30,088 INFO L175 Difference]: Start difference. First operand has 114 places, 179 transitions, 1527 flow. Second operand 6 states and 140 transitions. [2024-06-21 17:02:30,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 204 transitions, 2047 flow [2024-06-21 17:02:30,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 204 transitions, 1944 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 17:02:30,525 INFO L231 Difference]: Finished difference. Result has 116 places, 183 transitions, 1529 flow [2024-06-21 17:02:30,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1424, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1529, PETRI_PLACES=116, PETRI_TRANSITIONS=183} [2024-06-21 17:02:30,526 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 62 predicate places. [2024-06-21 17:02:30,526 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 183 transitions, 1529 flow [2024-06-21 17:02:30,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:30,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:30,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:30,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 17:02:30,527 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:30,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:30,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1738948764, now seen corresponding path program 2 times [2024-06-21 17:02:30,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:30,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400067916] [2024-06-21 17:02:30,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:30,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:31,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:31,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:31,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400067916] [2024-06-21 17:02:31,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400067916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:31,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:31,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 17:02:31,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388607296] [2024-06-21 17:02:31,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:31,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 17:02:31,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:31,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 17:02:31,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 17:02:31,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 17:02:31,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 183 transitions, 1529 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:31,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:31,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 17:02:31,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:32,479 INFO L124 PetriNetUnfolderBase]: 9167/13162 cut-off events. [2024-06-21 17:02:32,479 INFO L125 PetriNetUnfolderBase]: For 346529/346537 co-relation queries the response was YES. [2024-06-21 17:02:32,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81512 conditions, 13162 events. 9167/13162 cut-off events. For 346529/346537 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 73800 event pairs, 3775 based on Foata normal form. 6/13163 useless extension candidates. Maximal degree in co-relation 81464. Up to 12484 conditions per place. [2024-06-21 17:02:32,586 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 177 selfloop transitions, 21 changer transitions 0/205 dead transitions. [2024-06-21 17:02:32,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 205 transitions, 2049 flow [2024-06-21 17:02:32,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 17:02:32,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 17:02:32,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 17:02:32,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4542483660130719 [2024-06-21 17:02:32,588 INFO L175 Difference]: Start difference. First operand has 116 places, 183 transitions, 1529 flow. Second operand 6 states and 139 transitions. [2024-06-21 17:02:32,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 205 transitions, 2049 flow [2024-06-21 17:02:32,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 205 transitions, 1974 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 17:02:32,836 INFO L231 Difference]: Finished difference. Result has 118 places, 187 transitions, 1581 flow [2024-06-21 17:02:32,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1581, PETRI_PLACES=118, PETRI_TRANSITIONS=187} [2024-06-21 17:02:32,836 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 64 predicate places. [2024-06-21 17:02:32,836 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 187 transitions, 1581 flow [2024-06-21 17:02:32,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:32,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:32,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:32,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 17:02:32,837 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:32,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:32,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1738940828, now seen corresponding path program 1 times [2024-06-21 17:02:32,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:32,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121923893] [2024-06-21 17:02:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:32,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:32,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:33,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:33,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:33,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121923893] [2024-06-21 17:02:33,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121923893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:33,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:33,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:02:33,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46080869] [2024-06-21 17:02:33,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:33,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:02:33,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:33,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:02:33,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:02:33,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:33,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 187 transitions, 1581 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:33,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:33,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:33,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:35,262 INFO L124 PetriNetUnfolderBase]: 10882/15357 cut-off events. [2024-06-21 17:02:35,262 INFO L125 PetriNetUnfolderBase]: For 445383/445385 co-relation queries the response was YES. [2024-06-21 17:02:35,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97860 conditions, 15357 events. 10882/15357 cut-off events. For 445383/445385 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 84354 event pairs, 4596 based on Foata normal form. 2/15356 useless extension candidates. Maximal degree in co-relation 97811. Up to 14786 conditions per place. [2024-06-21 17:02:35,386 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 193 selfloop transitions, 18 changer transitions 0/217 dead transitions. [2024-06-21 17:02:35,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 217 transitions, 2164 flow [2024-06-21 17:02:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:02:35,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:02:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-21 17:02:35,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42296918767507 [2024-06-21 17:02:35,388 INFO L175 Difference]: Start difference. First operand has 118 places, 187 transitions, 1581 flow. Second operand 7 states and 151 transitions. [2024-06-21 17:02:35,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 217 transitions, 2164 flow [2024-06-21 17:02:35,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 217 transitions, 2062 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 17:02:35,645 INFO L231 Difference]: Finished difference. Result has 122 places, 195 transitions, 1632 flow [2024-06-21 17:02:35,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1632, PETRI_PLACES=122, PETRI_TRANSITIONS=195} [2024-06-21 17:02:35,646 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-06-21 17:02:35,646 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 195 transitions, 1632 flow [2024-06-21 17:02:35,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:35,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:35,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:35,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 17:02:35,647 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:35,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:35,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1513307369, now seen corresponding path program 1 times [2024-06-21 17:02:35,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:35,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638481556] [2024-06-21 17:02:35,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:35,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:36,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:36,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638481556] [2024-06-21 17:02:36,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638481556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:36,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:36,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:02:36,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044914010] [2024-06-21 17:02:36,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:36,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:02:36,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:02:36,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:02:36,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:36,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 195 transitions, 1632 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:36,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:36,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:36,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:38,709 INFO L124 PetriNetUnfolderBase]: 12114/16800 cut-off events. [2024-06-21 17:02:38,710 INFO L125 PetriNetUnfolderBase]: For 572458/572469 co-relation queries the response was YES. [2024-06-21 17:02:38,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113704 conditions, 16800 events. 12114/16800 cut-off events. For 572458/572469 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 91616 event pairs, 3727 based on Foata normal form. 28/16801 useless extension candidates. Maximal degree in co-relation 113653. Up to 14567 conditions per place. [2024-06-21 17:02:38,839 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 146 selfloop transitions, 101 changer transitions 0/254 dead transitions. [2024-06-21 17:02:38,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 254 transitions, 2572 flow [2024-06-21 17:02:38,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:38,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 17:02:38,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 17:02:38,841 INFO L175 Difference]: Start difference. First operand has 122 places, 195 transitions, 1632 flow. Second operand 8 states and 204 transitions. [2024-06-21 17:02:38,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 254 transitions, 2572 flow [2024-06-21 17:02:39,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 254 transitions, 2481 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 17:02:39,129 INFO L231 Difference]: Finished difference. Result has 126 places, 199 transitions, 1884 flow [2024-06-21 17:02:39,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1541, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1884, PETRI_PLACES=126, PETRI_TRANSITIONS=199} [2024-06-21 17:02:39,131 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 72 predicate places. [2024-06-21 17:02:39,131 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 199 transitions, 1884 flow [2024-06-21 17:02:39,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:39,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:39,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:39,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 17:02:39,136 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:39,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:39,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1459378659, now seen corresponding path program 2 times [2024-06-21 17:02:39,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:39,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472181310] [2024-06-21 17:02:39,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:39,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:39,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:39,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:39,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472181310] [2024-06-21 17:02:39,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472181310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:39,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:39,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:02:39,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307055680] [2024-06-21 17:02:39,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:39,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:02:39,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:39,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:02:39,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:02:40,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:40,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 199 transitions, 1884 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:40,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:40,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:40,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:42,368 INFO L124 PetriNetUnfolderBase]: 12274/17027 cut-off events. [2024-06-21 17:02:42,368 INFO L125 PetriNetUnfolderBase]: For 617605/617616 co-relation queries the response was YES. [2024-06-21 17:02:42,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118070 conditions, 17027 events. 12274/17027 cut-off events. For 617605/617616 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 93033 event pairs, 4665 based on Foata normal form. 28/17038 useless extension candidates. Maximal degree in co-relation 118018. Up to 15451 conditions per place. [2024-06-21 17:02:42,518 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 149 selfloop transitions, 99 changer transitions 0/255 dead transitions. [2024-06-21 17:02:42,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 255 transitions, 2622 flow [2024-06-21 17:02:42,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:42,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 17:02:42,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49754901960784315 [2024-06-21 17:02:42,520 INFO L175 Difference]: Start difference. First operand has 126 places, 199 transitions, 1884 flow. Second operand 8 states and 203 transitions. [2024-06-21 17:02:42,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 255 transitions, 2622 flow [2024-06-21 17:02:42,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 255 transitions, 2479 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 17:02:42,941 INFO L231 Difference]: Finished difference. Result has 130 places, 201 transitions, 2020 flow [2024-06-21 17:02:42,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1741, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2020, PETRI_PLACES=130, PETRI_TRANSITIONS=201} [2024-06-21 17:02:42,941 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 76 predicate places. [2024-06-21 17:02:42,942 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 201 transitions, 2020 flow [2024-06-21 17:02:42,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:42,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:42,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:42,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 17:02:42,942 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:42,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:42,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1572418026, now seen corresponding path program 1 times [2024-06-21 17:02:42,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:42,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120535640] [2024-06-21 17:02:42,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:42,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:43,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:43,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120535640] [2024-06-21 17:02:43,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120535640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:43,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:43,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:02:43,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359631833] [2024-06-21 17:02:43,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:43,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:02:43,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:43,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:02:43,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:02:43,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:43,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 201 transitions, 2020 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:43,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:43,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:43,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:45,696 INFO L124 PetriNetUnfolderBase]: 12396/17228 cut-off events. [2024-06-21 17:02:45,696 INFO L125 PetriNetUnfolderBase]: For 653574/653612 co-relation queries the response was YES. [2024-06-21 17:02:45,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121092 conditions, 17228 events. 12396/17228 cut-off events. For 653574/653612 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 94879 event pairs, 5027 based on Foata normal form. 30/17253 useless extension candidates. Maximal degree in co-relation 121038. Up to 16618 conditions per place. [2024-06-21 17:02:45,950 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 189 selfloop transitions, 47 changer transitions 0/243 dead transitions. [2024-06-21 17:02:45,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 243 transitions, 2710 flow [2024-06-21 17:02:45,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:02:45,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:02:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 17:02:45,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-21 17:02:45,952 INFO L175 Difference]: Start difference. First operand has 130 places, 201 transitions, 2020 flow. Second operand 7 states and 168 transitions. [2024-06-21 17:02:45,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 243 transitions, 2710 flow [2024-06-21 17:02:46,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 243 transitions, 2463 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:02:46,480 INFO L231 Difference]: Finished difference. Result has 131 places, 206 transitions, 1976 flow [2024-06-21 17:02:46,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1773, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1976, PETRI_PLACES=131, PETRI_TRANSITIONS=206} [2024-06-21 17:02:46,481 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 77 predicate places. [2024-06-21 17:02:46,481 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 206 transitions, 1976 flow [2024-06-21 17:02:46,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:46,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:46,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:46,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 17:02:46,481 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:46,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:46,482 INFO L85 PathProgramCache]: Analyzing trace with hash 2114647611, now seen corresponding path program 3 times [2024-06-21 17:02:46,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:46,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683133389] [2024-06-21 17:02:46,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:46,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:46,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:47,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:47,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:47,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683133389] [2024-06-21 17:02:47,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683133389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:47,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:47,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:02:47,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669613934] [2024-06-21 17:02:47,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:47,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:02:47,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:47,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:02:47,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:02:47,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:47,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 206 transitions, 1976 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:47,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:47,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:47,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:49,932 INFO L124 PetriNetUnfolderBase]: 12655/17653 cut-off events. [2024-06-21 17:02:49,932 INFO L125 PetriNetUnfolderBase]: For 719220/719257 co-relation queries the response was YES. [2024-06-21 17:02:50,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127768 conditions, 17653 events. 12655/17653 cut-off events. For 719220/719257 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 98030 event pairs, 4075 based on Foata normal form. 46/17692 useless extension candidates. Maximal degree in co-relation 127713. Up to 15871 conditions per place. [2024-06-21 17:02:50,119 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 162 selfloop transitions, 101 changer transitions 0/270 dead transitions. [2024-06-21 17:02:50,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 270 transitions, 3006 flow [2024-06-21 17:02:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:50,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 17:02:50,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5122549019607843 [2024-06-21 17:02:50,120 INFO L175 Difference]: Start difference. First operand has 131 places, 206 transitions, 1976 flow. Second operand 8 states and 209 transitions. [2024-06-21 17:02:50,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 270 transitions, 3006 flow [2024-06-21 17:02:50,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 270 transitions, 2841 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 17:02:50,696 INFO L231 Difference]: Finished difference. Result has 134 places, 210 transitions, 2170 flow [2024-06-21 17:02:50,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1811, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2170, PETRI_PLACES=134, PETRI_TRANSITIONS=210} [2024-06-21 17:02:50,697 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 80 predicate places. [2024-06-21 17:02:50,697 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 210 transitions, 2170 flow [2024-06-21 17:02:50,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:50,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:50,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:50,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 17:02:50,698 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:50,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:50,698 INFO L85 PathProgramCache]: Analyzing trace with hash -456696335, now seen corresponding path program 4 times [2024-06-21 17:02:50,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:50,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15665669] [2024-06-21 17:02:50,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:50,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:51,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:51,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:51,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15665669] [2024-06-21 17:02:51,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15665669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:51,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:51,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:02:51,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616785086] [2024-06-21 17:02:51,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:51,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:02:51,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:51,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:02:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:02:51,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:51,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 210 transitions, 2170 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:51,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:51,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:51,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:54,711 INFO L124 PetriNetUnfolderBase]: 12819/17873 cut-off events. [2024-06-21 17:02:54,711 INFO L125 PetriNetUnfolderBase]: For 770335/770368 co-relation queries the response was YES. [2024-06-21 17:02:54,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131370 conditions, 17873 events. 12819/17873 cut-off events. For 770335/770368 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 99370 event pairs, 4753 based on Foata normal form. 46/17912 useless extension candidates. Maximal degree in co-relation 131314. Up to 16515 conditions per place. [2024-06-21 17:02:54,865 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 166 selfloop transitions, 92 changer transitions 0/265 dead transitions. [2024-06-21 17:02:54,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 265 transitions, 2940 flow [2024-06-21 17:02:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:54,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 17:02:54,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4877450980392157 [2024-06-21 17:02:54,867 INFO L175 Difference]: Start difference. First operand has 134 places, 210 transitions, 2170 flow. Second operand 8 states and 199 transitions. [2024-06-21 17:02:54,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 265 transitions, 2940 flow [2024-06-21 17:02:55,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 265 transitions, 2777 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 17:02:55,428 INFO L231 Difference]: Finished difference. Result has 138 places, 212 transitions, 2283 flow [2024-06-21 17:02:55,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2283, PETRI_PLACES=138, PETRI_TRANSITIONS=212} [2024-06-21 17:02:55,428 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 84 predicate places. [2024-06-21 17:02:55,428 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 212 transitions, 2283 flow [2024-06-21 17:02:55,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:55,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:55,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:55,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 17:02:55,429 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:55,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:55,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2064528181, now seen corresponding path program 5 times [2024-06-21 17:02:55,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:55,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619244117] [2024-06-21 17:02:55,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:55,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:55,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:02:56,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:02:56,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:02:56,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619244117] [2024-06-21 17:02:56,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619244117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:02:56,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:02:56,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:02:56,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622554280] [2024-06-21 17:02:56,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:02:56,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:02:56,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:02:56,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:02:56,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:02:56,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:02:56,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 212 transitions, 2283 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:56,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:02:56,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:02:56,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:02:59,059 INFO L124 PetriNetUnfolderBase]: 12983/18141 cut-off events. [2024-06-21 17:02:59,059 INFO L125 PetriNetUnfolderBase]: For 813012/813049 co-relation queries the response was YES. [2024-06-21 17:02:59,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134622 conditions, 18141 events. 12983/18141 cut-off events. For 813012/813049 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 101404 event pairs, 4797 based on Foata normal form. 52/18186 useless extension candidates. Maximal degree in co-relation 134564. Up to 16759 conditions per place. [2024-06-21 17:02:59,374 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 167 selfloop transitions, 96 changer transitions 0/270 dead transitions. [2024-06-21 17:02:59,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 270 transitions, 3079 flow [2024-06-21 17:02:59,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:02:59,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:02:59,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 17:02:59,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49754901960784315 [2024-06-21 17:02:59,376 INFO L175 Difference]: Start difference. First operand has 138 places, 212 transitions, 2283 flow. Second operand 8 states and 203 transitions. [2024-06-21 17:02:59,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 270 transitions, 3079 flow [2024-06-21 17:02:59,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 270 transitions, 2849 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 17:02:59,951 INFO L231 Difference]: Finished difference. Result has 140 places, 214 transitions, 2341 flow [2024-06-21 17:02:59,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2053, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2341, PETRI_PLACES=140, PETRI_TRANSITIONS=214} [2024-06-21 17:02:59,952 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2024-06-21 17:02:59,952 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 214 transitions, 2341 flow [2024-06-21 17:02:59,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:02:59,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:02:59,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:02:59,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 17:02:59,952 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:02:59,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:02:59,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1777626361, now seen corresponding path program 1 times [2024-06-21 17:02:59,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:02:59,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132962712] [2024-06-21 17:02:59,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:02:59,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:02:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:00,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:00,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132962712] [2024-06-21 17:03:00,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132962712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:00,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:00,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:03:00,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020190015] [2024-06-21 17:03:00,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:00,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:03:00,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:00,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:03:00,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:03:01,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:03:01,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 214 transitions, 2341 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:01,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:01,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:03:01,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:03,774 INFO L124 PetriNetUnfolderBase]: 13075/18249 cut-off events. [2024-06-21 17:03:03,774 INFO L125 PetriNetUnfolderBase]: For 846916/846949 co-relation queries the response was YES. [2024-06-21 17:03:03,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136273 conditions, 18249 events. 13075/18249 cut-off events. For 846916/846949 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 102113 event pairs, 4771 based on Foata normal form. 34/18266 useless extension candidates. Maximal degree in co-relation 136214. Up to 16227 conditions per place. [2024-06-21 17:03:03,939 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 163 selfloop transitions, 99 changer transitions 0/269 dead transitions. [2024-06-21 17:03:03,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 269 transitions, 3117 flow [2024-06-21 17:03:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:03:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:03:03,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 17:03:03,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2024-06-21 17:03:03,941 INFO L175 Difference]: Start difference. First operand has 140 places, 214 transitions, 2341 flow. Second operand 8 states and 200 transitions. [2024-06-21 17:03:03,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 269 transitions, 3117 flow [2024-06-21 17:03:04,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 269 transitions, 2875 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 17:03:04,674 INFO L231 Difference]: Finished difference. Result has 142 places, 216 transitions, 2387 flow [2024-06-21 17:03:04,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2099, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2387, PETRI_PLACES=142, PETRI_TRANSITIONS=216} [2024-06-21 17:03:04,674 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 88 predicate places. [2024-06-21 17:03:04,675 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 216 transitions, 2387 flow [2024-06-21 17:03:04,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:04,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:04,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:04,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 17:03:04,675 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:04,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:04,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1572716556, now seen corresponding path program 2 times [2024-06-21 17:03:04,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:04,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378342608] [2024-06-21 17:03:04,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:04,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:05,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:05,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:05,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378342608] [2024-06-21 17:03:05,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378342608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:05,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:05,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 17:03:05,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435920330] [2024-06-21 17:03:05,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:05,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 17:03:05,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:05,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 17:03:05,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 17:03:05,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:03:05,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 216 transitions, 2387 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:05,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:05,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:03:05,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:08,148 INFO L124 PetriNetUnfolderBase]: 13210/18454 cut-off events. [2024-06-21 17:03:08,149 INFO L125 PetriNetUnfolderBase]: For 875019/875049 co-relation queries the response was YES. [2024-06-21 17:03:08,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138685 conditions, 18454 events. 13210/18454 cut-off events. For 875019/875049 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 103487 event pairs, 5124 based on Foata normal form. 30/18479 useless extension candidates. Maximal degree in co-relation 138625. Up to 17715 conditions per place. [2024-06-21 17:03:08,330 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 197 selfloop transitions, 53 changer transitions 0/257 dead transitions. [2024-06-21 17:03:08,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 257 transitions, 3319 flow [2024-06-21 17:03:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 17:03:08,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 17:03:08,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 17:03:08,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46218487394957986 [2024-06-21 17:03:08,332 INFO L175 Difference]: Start difference. First operand has 142 places, 216 transitions, 2387 flow. Second operand 7 states and 165 transitions. [2024-06-21 17:03:08,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 257 transitions, 3319 flow [2024-06-21 17:03:08,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 257 transitions, 3065 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 17:03:08,888 INFO L231 Difference]: Finished difference. Result has 144 places, 226 transitions, 2480 flow [2024-06-21 17:03:08,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2133, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2480, PETRI_PLACES=144, PETRI_TRANSITIONS=226} [2024-06-21 17:03:08,888 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 90 predicate places. [2024-06-21 17:03:08,889 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 226 transitions, 2480 flow [2024-06-21 17:03:08,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:08,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:08,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:08,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 17:03:08,889 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:08,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:08,890 INFO L85 PathProgramCache]: Analyzing trace with hash -574145723, now seen corresponding path program 6 times [2024-06-21 17:03:08,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:08,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78868048] [2024-06-21 17:03:08,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:08,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:08,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:09,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:09,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78868048] [2024-06-21 17:03:09,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78868048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:09,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:09,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 17:03:09,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644347064] [2024-06-21 17:03:09,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:09,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 17:03:09,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:09,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 17:03:09,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 17:03:09,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:03:09,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 226 transitions, 2480 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:09,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:09,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:03:09,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 17:03:12,563 INFO L124 PetriNetUnfolderBase]: 13141/18365 cut-off events. [2024-06-21 17:03:12,564 INFO L125 PetriNetUnfolderBase]: For 933055/933117 co-relation queries the response was YES. [2024-06-21 17:03:12,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141231 conditions, 18365 events. 13141/18365 cut-off events. For 933055/933117 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 102835 event pairs, 4718 based on Foata normal form. 63/18397 useless extension candidates. Maximal degree in co-relation 141169. Up to 16987 conditions per place. [2024-06-21 17:03:12,891 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 180 selfloop transitions, 89 changer transitions 0/276 dead transitions. [2024-06-21 17:03:12,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 276 transitions, 3194 flow [2024-06-21 17:03:12,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 17:03:12,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 17:03:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-21 17:03:12,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47549019607843135 [2024-06-21 17:03:12,893 INFO L175 Difference]: Start difference. First operand has 144 places, 226 transitions, 2480 flow. Second operand 8 states and 194 transitions. [2024-06-21 17:03:12,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 276 transitions, 3194 flow [2024-06-21 17:03:13,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 276 transitions, 3005 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-21 17:03:13,797 INFO L231 Difference]: Finished difference. Result has 149 places, 226 transitions, 2481 flow [2024-06-21 17:03:13,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2291, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2481, PETRI_PLACES=149, PETRI_TRANSITIONS=226} [2024-06-21 17:03:13,799 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 95 predicate places. [2024-06-21 17:03:13,799 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 226 transitions, 2481 flow [2024-06-21 17:03:13,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:13,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 17:03:13,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 17:03:13,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 17:03:13,800 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 17:03:13,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 17:03:13,800 INFO L85 PathProgramCache]: Analyzing trace with hash -317430011, now seen corresponding path program 2 times [2024-06-21 17:03:13,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 17:03:13,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507229373] [2024-06-21 17:03:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 17:03:13,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 17:03:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 17:03:14,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 17:03:14,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 17:03:14,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507229373] [2024-06-21 17:03:14,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507229373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 17:03:14,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 17:03:14,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 17:03:14,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459555303] [2024-06-21 17:03:14,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 17:03:14,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 17:03:14,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 17:03:14,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 17:03:14,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 17:03:14,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 17:03:14,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 226 transitions, 2481 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 17:03:14,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 17:03:14,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 17:03:14,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand