./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix019_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix019_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 20:06:19,862 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:06:19,948 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:06:19,952 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:06:19,952 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:06:19,981 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:06:19,982 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:06:19,982 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:06:19,983 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:06:19,985 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:06:19,986 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:06:19,986 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:06:19,987 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:06:19,988 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:06:19,988 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:06:19,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:06:19,988 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:06:19,988 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:06:19,989 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:06:19,989 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:06:19,989 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:06:19,989 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:06:19,990 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:06:19,990 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:06:19,991 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:06:19,991 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:06:19,991 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:06:19,991 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:06:19,992 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:06:19,992 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:06:19,993 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:06:19,993 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:06:19,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:06:19,993 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:06:19,993 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:06:19,993 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:06:19,993 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:06:19,994 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:06:19,994 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:06:19,994 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:06:19,994 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:06:19,994 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:06:19,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:06:19,995 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:06:20,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:06:20,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:06:20,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:06:20,206 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:06:20,206 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:06:20,207 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 20:06:21,233 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:06:21,454 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:06:21,455 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 20:06:21,471 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09902914d/142c3dd4c4314d99b85d841d2c7a8c5b/FLAGb5d844685 [2024-06-27 20:06:21,483 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09902914d/142c3dd4c4314d99b85d841d2c7a8c5b [2024-06-27 20:06:21,485 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:06:21,485 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:06:21,485 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix019_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-27 20:06:21,613 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:06:21,614 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:06:21,615 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:06:21,615 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:06:21,618 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:06:21,619 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:06:21" (1/2) ... [2024-06-27 20:06:21,620 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7428f4c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:06:21, skipping insertion in model container [2024-06-27 20:06:21,620 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:06:21" (1/2) ... [2024-06-27 20:06:21,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@825f1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:06:21, skipping insertion in model container [2024-06-27 20:06:21,621 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:06:21" (2/2) ... [2024-06-27 20:06:21,621 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7428f4c3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:21, skipping insertion in model container [2024-06-27 20:06:21,622 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:06:21" (2/2) ... [2024-06-27 20:06:21,622 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:06:21,694 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:06:21,695 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-27 20:06:21,695 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-27 20:06:21,695 INFO L97 edCorrectnessWitness]: Location invariant before [L843-L843] ((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1)) [2024-06-27 20:06:21,695 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:06:21,696 INFO L106 edCorrectnessWitness]: ghost_update [L839-L839] multithreaded = 1; [2024-06-27 20:06:21,738 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:06:22,020 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:06:22,029 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:06:22,141 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:06:22,168 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:06:22,168 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22 WrapperNode [2024-06-27 20:06:22,169 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:06:22,169 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:06:22,170 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:06:22,170 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:06:22,175 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22" (1/1) ... [2024-06-27 20:06:22,187 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22" (1/1) ... [2024-06-27 20:06:22,210 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-27 20:06:22,210 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:06:22,211 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:06:22,211 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:06:22,211 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:06:22,219 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22" (1/1) ... [2024-06-27 20:06:22,219 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22" (1/1) ... [2024-06-27 20:06:22,222 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22" (1/1) ... [2024-06-27 20:06:22,239 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]. [2024-06-27 20:06:22,240 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22" (1/1) ... [2024-06-27 20:06:22,240 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22" (1/1) ... [2024-06-27 20:06:22,267 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22" (1/1) ... [2024-06-27 20:06:22,269 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22" (1/1) ... [2024-06-27 20:06:22,270 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22" (1/1) ... [2024-06-27 20:06:22,272 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22" (1/1) ... [2024-06-27 20:06:22,289 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:06:22,290 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:06:22,290 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:06:22,290 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:06:22,291 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22" (1/1) ... [2024-06-27 20:06:22,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:06:22,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:06:22,321 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) [2024-06-27 20:06:22,341 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 [2024-06-27 20:06:22,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:06:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:06:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:06:22,356 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:06:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:06:22,356 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:06:22,356 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:06:22,357 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:06:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:06:22,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:06:22,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:06:22,358 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:06:22,359 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:06:22,502 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:06:22,504 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:06:22,865 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:06:22,867 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:06:22,987 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:06:22,987 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:06:22,987 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:06:22 BoogieIcfgContainer [2024-06-27 20:06:22,988 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:06:22,989 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:06:22,989 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:06:22,991 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:06:22,992 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:06:21" (1/4) ... [2024-06-27 20:06:22,992 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3627ef9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:06:22, skipping insertion in model container [2024-06-27 20:06:22,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:06:21" (2/4) ... [2024-06-27 20:06:22,993 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3627ef9d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:06:22, skipping insertion in model container [2024-06-27 20:06:22,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:06:22" (3/4) ... [2024-06-27 20:06:22,993 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3627ef9d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:06:22, skipping insertion in model container [2024-06-27 20:06:22,993 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:06:22" (4/4) ... [2024-06-27 20:06:22,994 INFO L112 eAbstractionObserver]: Analyzing ICFG mix019_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 20:06:23,007 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:06:23,007 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:06:23,008 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:06:23,046 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:06:23,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 20:06:23,098 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-27 20:06:23,098 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:06:23,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:06:23,100 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-27 20:06:23,103 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-27 20:06:23,115 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:06:23,121 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;@72c6993b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:06:23,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:06:23,126 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:06:23,126 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 20:06:23,126 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:06:23,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:23,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:06:23,127 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:23,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:23,131 INFO L85 PathProgramCache]: Analyzing trace with hash 373697404, now seen corresponding path program 1 times [2024-06-27 20:06:23,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:23,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251952559] [2024-06-27 20:06:23,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:23,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:23,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:23,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251952559] [2024-06-27 20:06:23,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251952559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:23,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:23,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:06:23,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626093578] [2024-06-27 20:06:23,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:23,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:06:23,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:23,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:06:23,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:06:24,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:06:24,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:24,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:24,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:06:24,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:24,352 INFO L124 PetriNetUnfolderBase]: 1363/2122 cut-off events. [2024-06-27 20:06:24,352 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-27 20:06:24,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4246 conditions, 2122 events. 1363/2122 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10298 event pairs, 964 based on Foata normal form. 1/2071 useless extension candidates. Maximal degree in co-relation 4234. Up to 2037 conditions per place. [2024-06-27 20:06:24,366 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-27 20:06:24,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-27 20:06:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:06:24,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:06:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-06-27 20:06:24,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-27 20:06:24,377 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 75 transitions. [2024-06-27 20:06:24,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-27 20:06:24,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:06:24,382 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-27 20:06:24,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-27 20:06:24,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-27 20:06:24,388 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-27 20:06:24,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:24,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:24,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:24,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:06:24,389 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:24,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:24,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1653924427, now seen corresponding path program 1 times [2024-06-27 20:06:24,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:24,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670525235] [2024-06-27 20:06:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:24,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:24,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:24,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670525235] [2024-06-27 20:06:24,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670525235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:24,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:24,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:06:24,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108741534] [2024-06-27 20:06:24,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:24,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:06:24,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:24,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:06:24,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:06:24,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:06:24,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:24,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:24,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:06:24,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:25,232 INFO L124 PetriNetUnfolderBase]: 1357/2118 cut-off events. [2024-06-27 20:06:25,232 INFO L125 PetriNetUnfolderBase]: For 393/393 co-relation queries the response was YES. [2024-06-27 20:06:25,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4785 conditions, 2118 events. 1357/2118 cut-off events. For 393/393 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10348 event pairs, 840 based on Foata normal form. 3/2108 useless extension candidates. Maximal degree in co-relation 4773. Up to 2013 conditions per place. [2024-06-27 20:06:25,245 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-27 20:06:25,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 238 flow [2024-06-27 20:06:25,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:06:25,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:06:25,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-27 20:06:25,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-27 20:06:25,248 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 97 transitions. [2024-06-27 20:06:25,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 238 flow [2024-06-27 20:06:25,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:06:25,251 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-27 20:06:25,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-27 20:06:25,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-27 20:06:25,252 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-27 20:06:25,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:25,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:25,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:25,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:06:25,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:25,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:25,256 INFO L85 PathProgramCache]: Analyzing trace with hash 267951523, now seen corresponding path program 1 times [2024-06-27 20:06:25,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:25,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255723553] [2024-06-27 20:06:25,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:25,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:25,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:25,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:25,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255723553] [2024-06-27 20:06:25,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255723553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:25,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:25,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:06:25,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817608767] [2024-06-27 20:06:25,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:25,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:06:25,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:25,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:06:25,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:06:25,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:06:25,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:25,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:25,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:06:25,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:26,129 INFO L124 PetriNetUnfolderBase]: 1411/2217 cut-off events. [2024-06-27 20:06:26,130 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2024-06-27 20:06:26,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5545 conditions, 2217 events. 1411/2217 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 10878 event pairs, 629 based on Foata normal form. 7/2217 useless extension candidates. Maximal degree in co-relation 5531. Up to 1982 conditions per place. [2024-06-27 20:06:26,139 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 54 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-27 20:06:26,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 76 transitions, 400 flow [2024-06-27 20:06:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:06:26,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:06:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 20:06:26,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-27 20:06:26,141 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 129 transitions. [2024-06-27 20:06:26,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 76 transitions, 400 flow [2024-06-27 20:06:26,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 76 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:06:26,143 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 237 flow [2024-06-27 20:06:26,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-27 20:06:26,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-27 20:06:26,144 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 237 flow [2024-06-27 20:06:26,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:26,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:26,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:26,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:06:26,145 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:26,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:26,145 INFO L85 PathProgramCache]: Analyzing trace with hash -366553030, now seen corresponding path program 1 times [2024-06-27 20:06:26,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:26,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590557029] [2024-06-27 20:06:26,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:26,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:26,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:26,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590557029] [2024-06-27 20:06:26,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590557029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:26,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:26,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:06:26,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890633061] [2024-06-27 20:06:26,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:26,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:06:26,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:26,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:06:26,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:06:26,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:06:26,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:26,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:26,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:06:26,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:27,256 INFO L124 PetriNetUnfolderBase]: 1433/2262 cut-off events. [2024-06-27 20:06:27,257 INFO L125 PetriNetUnfolderBase]: For 2845/2845 co-relation queries the response was YES. [2024-06-27 20:06:27,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6827 conditions, 2262 events. 1433/2262 cut-off events. For 2845/2845 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 11244 event pairs, 476 based on Foata normal form. 7/2265 useless extension candidates. Maximal degree in co-relation 6810. Up to 1925 conditions per place. [2024-06-27 20:06:27,267 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 65 selfloop transitions, 28 changer transitions 0/99 dead transitions. [2024-06-27 20:06:27,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 99 transitions, 629 flow [2024-06-27 20:06:27,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:06:27,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:06:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 20:06:27,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-27 20:06:27,269 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 237 flow. Second operand 6 states and 156 transitions. [2024-06-27 20:06:27,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 99 transitions, 629 flow [2024-06-27 20:06:27,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 621 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 20:06:27,273 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 416 flow [2024-06-27 20:06:27,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=416, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2024-06-27 20:06:27,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-27 20:06:27,274 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 416 flow [2024-06-27 20:06:27,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:27,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:27,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:27,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:06:27,275 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:27,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:27,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1521759228, now seen corresponding path program 1 times [2024-06-27 20:06:27,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:27,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297785358] [2024-06-27 20:06:27,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:27,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:27,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:27,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:27,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297785358] [2024-06-27 20:06:27,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297785358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:27,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:27,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:06:27,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072704633] [2024-06-27 20:06:27,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:27,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:06:27,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:27,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:06:27,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:06:28,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-27 20:06:28,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 416 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:28,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:28,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-27 20:06:28,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:28,471 INFO L124 PetriNetUnfolderBase]: 1550/2461 cut-off events. [2024-06-27 20:06:28,472 INFO L125 PetriNetUnfolderBase]: For 5758/5758 co-relation queries the response was YES. [2024-06-27 20:06:28,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8755 conditions, 2461 events. 1550/2461 cut-off events. For 5758/5758 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12534 event pairs, 342 based on Foata normal form. 30/2488 useless extension candidates. Maximal degree in co-relation 8732. Up to 1955 conditions per place. [2024-06-27 20:06:28,487 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 83 selfloop transitions, 22 changer transitions 0/111 dead transitions. [2024-06-27 20:06:28,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 111 transitions, 817 flow [2024-06-27 20:06:28,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:06:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:06:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 20:06:28,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-27 20:06:28,490 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 416 flow. Second operand 7 states and 176 transitions. [2024-06-27 20:06:28,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 111 transitions, 817 flow [2024-06-27 20:06:28,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 111 transitions, 793 flow, removed 12 selfloop flow, removed 0 redundant places. [2024-06-27 20:06:28,501 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 493 flow [2024-06-27 20:06:28,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=493, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-27 20:06:28,503 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-27 20:06:28,503 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 493 flow [2024-06-27 20:06:28,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:28,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:28,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:28,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:06:28,505 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:28,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:28,505 INFO L85 PathProgramCache]: Analyzing trace with hash 825546214, now seen corresponding path program 1 times [2024-06-27 20:06:28,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:28,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118242786] [2024-06-27 20:06:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:28,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:28,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:28,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118242786] [2024-06-27 20:06:28,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118242786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:28,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:28,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:06:28,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663124624] [2024-06-27 20:06:28,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:28,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:06:28,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:28,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:06:28,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:06:29,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:29,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 493 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:29,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:29,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:29,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:29,424 INFO L124 PetriNetUnfolderBase]: 1540/2452 cut-off events. [2024-06-27 20:06:29,425 INFO L125 PetriNetUnfolderBase]: For 7059/7059 co-relation queries the response was YES. [2024-06-27 20:06:29,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9202 conditions, 2452 events. 1540/2452 cut-off events. For 7059/7059 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12511 event pairs, 531 based on Foata normal form. 4/2455 useless extension candidates. Maximal degree in co-relation 9174. Up to 2310 conditions per place. [2024-06-27 20:06:29,438 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 62 selfloop transitions, 10 changer transitions 0/77 dead transitions. [2024-06-27 20:06:29,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 77 transitions, 665 flow [2024-06-27 20:06:29,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:06:29,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:06:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-27 20:06:29,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4682926829268293 [2024-06-27 20:06:29,439 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 493 flow. Second operand 5 states and 96 transitions. [2024-06-27 20:06:29,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 77 transitions, 665 flow [2024-06-27 20:06:29,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 77 transitions, 617 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 20:06:29,444 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 475 flow [2024-06-27 20:06:29,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=445, 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=475, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-27 20:06:29,445 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-27 20:06:29,445 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 475 flow [2024-06-27 20:06:29,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:29,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:29,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:29,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:06:29,446 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:29,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:29,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1001015545, now seen corresponding path program 1 times [2024-06-27 20:06:29,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:29,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319187374] [2024-06-27 20:06:29,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:29,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:29,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:29,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:29,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319187374] [2024-06-27 20:06:29,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319187374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:29,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:29,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:06:29,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472351788] [2024-06-27 20:06:29,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:29,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:06:29,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:29,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:06:29,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:06:30,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:30,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 475 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:30,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:30,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:30,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:30,377 INFO L124 PetriNetUnfolderBase]: 1552/2463 cut-off events. [2024-06-27 20:06:30,378 INFO L125 PetriNetUnfolderBase]: For 7927/7927 co-relation queries the response was YES. [2024-06-27 20:06:30,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9249 conditions, 2463 events. 1552/2463 cut-off events. For 7927/7927 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12557 event pairs, 469 based on Foata normal form. 8/2468 useless extension candidates. Maximal degree in co-relation 9219. Up to 2208 conditions per place. [2024-06-27 20:06:30,393 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 67 selfloop transitions, 19 changer transitions 0/91 dead transitions. [2024-06-27 20:06:30,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 761 flow [2024-06-27 20:06:30,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:06:30,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:06:30,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-27 20:06:30,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:06:30,394 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 475 flow. Second operand 6 states and 123 transitions. [2024-06-27 20:06:30,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 761 flow [2024-06-27 20:06:30,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 91 transitions, 731 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 20:06:30,401 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 527 flow [2024-06-27 20:06:30,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=527, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-27 20:06:30,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-27 20:06:30,402 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 527 flow [2024-06-27 20:06:30,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:30,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:30,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:30,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:06:30,403 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:30,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:30,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1218991803, now seen corresponding path program 2 times [2024-06-27 20:06:30,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:30,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050318805] [2024-06-27 20:06:30,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:30,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:30,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:30,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050318805] [2024-06-27 20:06:30,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050318805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:30,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:30,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:06:30,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93268264] [2024-06-27 20:06:30,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:30,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:06:30,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:30,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:06:30,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:06:30,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:30,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 527 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:30,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:30,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:30,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:31,299 INFO L124 PetriNetUnfolderBase]: 1510/2388 cut-off events. [2024-06-27 20:06:31,299 INFO L125 PetriNetUnfolderBase]: For 8890/8890 co-relation queries the response was YES. [2024-06-27 20:06:31,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9203 conditions, 2388 events. 1510/2388 cut-off events. For 8890/8890 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12004 event pairs, 507 based on Foata normal form. 4/2391 useless extension candidates. Maximal degree in co-relation 9173. Up to 2241 conditions per place. [2024-06-27 20:06:31,338 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-06-27 20:06:31,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 85 transitions, 729 flow [2024-06-27 20:06:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:06:31,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:06:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 20:06:31,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-27 20:06:31,340 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 527 flow. Second operand 6 states and 113 transitions. [2024-06-27 20:06:31,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 85 transitions, 729 flow [2024-06-27 20:06:31,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 700 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:06:31,347 INFO L231 Difference]: Finished difference. Result has 72 places, 69 transitions, 528 flow [2024-06-27 20:06:31,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=528, PETRI_PLACES=72, PETRI_TRANSITIONS=69} [2024-06-27 20:06:31,348 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-27 20:06:31,348 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 69 transitions, 528 flow [2024-06-27 20:06:31,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:31,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:31,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:31,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:06:31,349 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:31,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:31,349 INFO L85 PathProgramCache]: Analyzing trace with hash -264966119, now seen corresponding path program 1 times [2024-06-27 20:06:31,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:31,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498818185] [2024-06-27 20:06:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:31,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:32,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:32,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498818185] [2024-06-27 20:06:32,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498818185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:32,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:32,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:32,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870868028] [2024-06-27 20:06:32,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:32,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:32,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:32,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:32,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:32,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:06:32,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 69 transitions, 528 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:32,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:32,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:06:32,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:33,070 INFO L124 PetriNetUnfolderBase]: 1833/2841 cut-off events. [2024-06-27 20:06:33,070 INFO L125 PetriNetUnfolderBase]: For 12290/12290 co-relation queries the response was YES. [2024-06-27 20:06:33,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10950 conditions, 2841 events. 1833/2841 cut-off events. For 12290/12290 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13860 event pairs, 638 based on Foata normal form. 4/2844 useless extension candidates. Maximal degree in co-relation 10919. Up to 2693 conditions per place. [2024-06-27 20:06:33,085 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 75 selfloop transitions, 15 changer transitions 0/94 dead transitions. [2024-06-27 20:06:33,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 94 transitions, 806 flow [2024-06-27 20:06:33,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:06:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:06:33,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 20:06:33,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-27 20:06:33,087 INFO L175 Difference]: Start difference. First operand has 72 places, 69 transitions, 528 flow. Second operand 7 states and 124 transitions. [2024-06-27 20:06:33,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 94 transitions, 806 flow [2024-06-27 20:06:33,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 94 transitions, 752 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:33,096 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 569 flow [2024-06-27 20:06:33,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=569, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-27 20:06:33,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-27 20:06:33,097 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 569 flow [2024-06-27 20:06:33,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:33,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:33,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:33,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:06:33,098 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:33,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:33,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1426649731, now seen corresponding path program 1 times [2024-06-27 20:06:33,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:33,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637503423] [2024-06-27 20:06:33,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:33,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:33,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:33,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:33,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637503423] [2024-06-27 20:06:33,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637503423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:33,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:33,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:06:33,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445587430] [2024-06-27 20:06:33,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:33,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:06:33,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:33,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:06:33,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:06:33,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:06:33,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 569 flow. Second operand has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:33,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:33,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:06:33,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:34,045 INFO L124 PetriNetUnfolderBase]: 2082/3106 cut-off events. [2024-06-27 20:06:34,045 INFO L125 PetriNetUnfolderBase]: For 16145/16145 co-relation queries the response was YES. [2024-06-27 20:06:34,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12666 conditions, 3106 events. 2082/3106 cut-off events. For 16145/16145 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14458 event pairs, 763 based on Foata normal form. 1/3106 useless extension candidates. Maximal degree in co-relation 12634. Up to 3091 conditions per place. [2024-06-27 20:06:34,061 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 74 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2024-06-27 20:06:34,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 85 transitions, 777 flow [2024-06-27 20:06:34,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:06:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:06:34,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-27 20:06:34,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-27 20:06:34,063 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 569 flow. Second operand 5 states and 83 transitions. [2024-06-27 20:06:34,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 85 transitions, 777 flow [2024-06-27 20:06:34,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 736 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 20:06:34,076 INFO L231 Difference]: Finished difference. Result has 75 places, 77 transitions, 580 flow [2024-06-27 20:06:34,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=580, PETRI_PLACES=75, PETRI_TRANSITIONS=77} [2024-06-27 20:06:34,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-27 20:06:34,079 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 77 transitions, 580 flow [2024-06-27 20:06:34,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.0) internal successors, (60), 6 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:34,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:34,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:34,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:06:34,080 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:34,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:34,080 INFO L85 PathProgramCache]: Analyzing trace with hash 92974566, now seen corresponding path program 1 times [2024-06-27 20:06:34,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:34,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422455364] [2024-06-27 20:06:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:34,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:34,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:34,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:34,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422455364] [2024-06-27 20:06:34,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422455364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:34,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:34,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:06:34,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506778685] [2024-06-27 20:06:34,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:34,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:06:34,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:34,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:06:34,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:06:34,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:34,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 77 transitions, 580 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:34,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:34,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:34,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:35,345 INFO L124 PetriNetUnfolderBase]: 1788/2771 cut-off events. [2024-06-27 20:06:35,345 INFO L125 PetriNetUnfolderBase]: For 18317/18319 co-relation queries the response was YES. [2024-06-27 20:06:35,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11783 conditions, 2771 events. 1788/2771 cut-off events. For 18317/18319 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13977 event pairs, 553 based on Foata normal form. 4/2764 useless extension candidates. Maximal degree in co-relation 11750. Up to 2432 conditions per place. [2024-06-27 20:06:35,364 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 78 selfloop transitions, 28 changer transitions 0/113 dead transitions. [2024-06-27 20:06:35,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 906 flow [2024-06-27 20:06:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:35,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 20:06:35,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-27 20:06:35,366 INFO L175 Difference]: Start difference. First operand has 75 places, 77 transitions, 580 flow. Second operand 8 states and 161 transitions. [2024-06-27 20:06:35,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 906 flow [2024-06-27 20:06:35,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 876 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 20:06:35,378 INFO L231 Difference]: Finished difference. Result has 80 places, 80 transitions, 645 flow [2024-06-27 20:06:35,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=645, PETRI_PLACES=80, PETRI_TRANSITIONS=80} [2024-06-27 20:06:35,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-27 20:06:35,379 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 80 transitions, 645 flow [2024-06-27 20:06:35,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:35,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:35,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:35,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:06:35,380 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:35,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:35,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1372063240, now seen corresponding path program 1 times [2024-06-27 20:06:35,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:35,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771784751] [2024-06-27 20:06:35,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:35,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:36,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:36,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771784751] [2024-06-27 20:06:36,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771784751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:36,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:36,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:36,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506880884] [2024-06-27 20:06:36,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:36,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:36,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:36,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:36,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:36,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:06:36,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 80 transitions, 645 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:36,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:36,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:06:36,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:36,743 INFO L124 PetriNetUnfolderBase]: 1930/2956 cut-off events. [2024-06-27 20:06:36,743 INFO L125 PetriNetUnfolderBase]: For 22313/22313 co-relation queries the response was YES. [2024-06-27 20:06:36,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13328 conditions, 2956 events. 1930/2956 cut-off events. For 22313/22313 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14238 event pairs, 670 based on Foata normal form. 2/2957 useless extension candidates. Maximal degree in co-relation 13294. Up to 2783 conditions per place. [2024-06-27 20:06:36,758 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 79 selfloop transitions, 19 changer transitions 0/103 dead transitions. [2024-06-27 20:06:36,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 103 transitions, 926 flow [2024-06-27 20:06:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:06:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:06:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-27 20:06:36,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-27 20:06:36,760 INFO L175 Difference]: Start difference. First operand has 80 places, 80 transitions, 645 flow. Second operand 7 states and 125 transitions. [2024-06-27 20:06:36,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 103 transitions, 926 flow [2024-06-27 20:06:36,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 103 transitions, 851 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:36,773 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 659 flow [2024-06-27 20:06:36,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=659, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-06-27 20:06:36,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-27 20:06:36,774 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 659 flow [2024-06-27 20:06:36,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:36,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:36,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:36,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:06:36,775 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:36,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:36,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1291660321, now seen corresponding path program 1 times [2024-06-27 20:06:36,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:36,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708743830] [2024-06-27 20:06:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:36,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:37,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:37,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:37,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708743830] [2024-06-27 20:06:37,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708743830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:37,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:37,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:06:37,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224135792] [2024-06-27 20:06:37,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:37,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:06:37,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:37,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:06:37,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:06:37,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:06:37,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 659 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:37,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:37,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:06:37,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:37,774 INFO L124 PetriNetUnfolderBase]: 2075/3098 cut-off events. [2024-06-27 20:06:37,775 INFO L125 PetriNetUnfolderBase]: For 24533/24533 co-relation queries the response was YES. [2024-06-27 20:06:37,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13929 conditions, 3098 events. 2075/3098 cut-off events. For 24533/24533 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 14318 event pairs, 731 based on Foata normal form. 3/3100 useless extension candidates. Maximal degree in co-relation 13894. Up to 3074 conditions per place. [2024-06-27 20:06:37,791 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 83 selfloop transitions, 11 changer transitions 0/97 dead transitions. [2024-06-27 20:06:37,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 97 transitions, 901 flow [2024-06-27 20:06:37,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:06:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:06:37,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 20:06:37,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-27 20:06:37,792 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 659 flow. Second operand 6 states and 97 transitions. [2024-06-27 20:06:37,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 97 transitions, 901 flow [2024-06-27 20:06:37,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 97 transitions, 847 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:37,810 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 667 flow [2024-06-27 20:06:37,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=667, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-27 20:06:37,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-27 20:06:37,811 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 667 flow [2024-06-27 20:06:37,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:37,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:37,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:37,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:06:37,812 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:37,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:37,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1412814630, now seen corresponding path program 1 times [2024-06-27 20:06:37,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:37,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351985583] [2024-06-27 20:06:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:37,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:37,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:38,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:38,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351985583] [2024-06-27 20:06:38,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351985583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:38,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:38,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:38,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022006256] [2024-06-27 20:06:38,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:38,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:38,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:38,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:38,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:38,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:38,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 667 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:38,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:38,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:38,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:39,279 INFO L124 PetriNetUnfolderBase]: 2064/3204 cut-off events. [2024-06-27 20:06:39,279 INFO L125 PetriNetUnfolderBase]: For 31356/31356 co-relation queries the response was YES. [2024-06-27 20:06:39,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15017 conditions, 3204 events. 2064/3204 cut-off events. For 31356/31356 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 16537 event pairs, 363 based on Foata normal form. 16/3200 useless extension candidates. Maximal degree in co-relation 14981. Up to 2268 conditions per place. [2024-06-27 20:06:39,299 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 95 selfloop transitions, 30 changer transitions 0/132 dead transitions. [2024-06-27 20:06:39,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 132 transitions, 1133 flow [2024-06-27 20:06:39,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:39,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:39,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-27 20:06:39,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-27 20:06:39,300 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 667 flow. Second operand 8 states and 168 transitions. [2024-06-27 20:06:39,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 132 transitions, 1133 flow [2024-06-27 20:06:39,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 132 transitions, 1093 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 20:06:39,321 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 727 flow [2024-06-27 20:06:39,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=727, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2024-06-27 20:06:39,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-27 20:06:39,322 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 727 flow [2024-06-27 20:06:39,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:39,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:39,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:39,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:06:39,322 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:39,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:39,323 INFO L85 PathProgramCache]: Analyzing trace with hash -8766880, now seen corresponding path program 2 times [2024-06-27 20:06:39,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:39,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233667124] [2024-06-27 20:06:39,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:39,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:40,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:40,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233667124] [2024-06-27 20:06:40,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233667124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:40,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:40,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:40,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626880768] [2024-06-27 20:06:40,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:40,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:40,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:40,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:40,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:40,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:40,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 727 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:40,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:40,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:40,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:40,817 INFO L124 PetriNetUnfolderBase]: 2140/3338 cut-off events. [2024-06-27 20:06:40,817 INFO L125 PetriNetUnfolderBase]: For 36025/36025 co-relation queries the response was YES. [2024-06-27 20:06:40,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15979 conditions, 3338 events. 2140/3338 cut-off events. For 36025/36025 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17587 event pairs, 561 based on Foata normal form. 20/3350 useless extension candidates. Maximal degree in co-relation 15942. Up to 2771 conditions per place. [2024-06-27 20:06:40,833 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 86 selfloop transitions, 42 changer transitions 0/135 dead transitions. [2024-06-27 20:06:40,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 135 transitions, 1193 flow [2024-06-27 20:06:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:06:40,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:06:40,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 20:06:40,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4905149051490515 [2024-06-27 20:06:40,835 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 727 flow. Second operand 9 states and 181 transitions. [2024-06-27 20:06:40,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 135 transitions, 1193 flow [2024-06-27 20:06:40,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 135 transitions, 1150 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 20:06:40,859 INFO L231 Difference]: Finished difference. Result has 90 places, 92 transitions, 813 flow [2024-06-27 20:06:40,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=687, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=813, PETRI_PLACES=90, PETRI_TRANSITIONS=92} [2024-06-27 20:06:40,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-27 20:06:40,860 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 92 transitions, 813 flow [2024-06-27 20:06:40,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:40,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:40,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:40,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:06:40,860 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:40,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:40,861 INFO L85 PathProgramCache]: Analyzing trace with hash -5970370, now seen corresponding path program 3 times [2024-06-27 20:06:40,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:40,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678463359] [2024-06-27 20:06:40,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:40,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:41,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:41,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678463359] [2024-06-27 20:06:41,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678463359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:41,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:41,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:41,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322152886] [2024-06-27 20:06:41,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:41,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:41,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:41,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:41,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:41,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-27 20:06:41,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 813 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:41,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:41,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-27 20:06:41,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:42,358 INFO L124 PetriNetUnfolderBase]: 2212/3454 cut-off events. [2024-06-27 20:06:42,359 INFO L125 PetriNetUnfolderBase]: For 41490/41490 co-relation queries the response was YES. [2024-06-27 20:06:42,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16831 conditions, 3454 events. 2212/3454 cut-off events. For 41490/41490 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18332 event pairs, 595 based on Foata normal form. 28/3471 useless extension candidates. Maximal degree in co-relation 16792. Up to 2953 conditions per place. [2024-06-27 20:06:42,379 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 94 selfloop transitions, 28 changer transitions 0/129 dead transitions. [2024-06-27 20:06:42,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 129 transitions, 1189 flow [2024-06-27 20:06:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:42,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-27 20:06:42,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49085365853658536 [2024-06-27 20:06:42,380 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 813 flow. Second operand 8 states and 161 transitions. [2024-06-27 20:06:42,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 129 transitions, 1189 flow [2024-06-27 20:06:42,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 129 transitions, 1115 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 20:06:42,411 INFO L231 Difference]: Finished difference. Result has 94 places, 94 transitions, 834 flow [2024-06-27 20:06:42,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=739, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=834, PETRI_PLACES=94, PETRI_TRANSITIONS=94} [2024-06-27 20:06:42,412 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-27 20:06:42,412 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 94 transitions, 834 flow [2024-06-27 20:06:42,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:42,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:42,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:42,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:06:42,413 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:42,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:42,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1398204194, now seen corresponding path program 1 times [2024-06-27 20:06:42,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:42,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372968670] [2024-06-27 20:06:42,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:42,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:42,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:42,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372968670] [2024-06-27 20:06:42,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372968670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:42,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:42,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:06:42,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161043037] [2024-06-27 20:06:42,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:42,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:06:42,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:42,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:06:42,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:06:43,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:06:43,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 94 transitions, 834 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:43,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:43,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:06:43,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:43,464 INFO L124 PetriNetUnfolderBase]: 2467/3739 cut-off events. [2024-06-27 20:06:43,464 INFO L125 PetriNetUnfolderBase]: For 42595/42595 co-relation queries the response was YES. [2024-06-27 20:06:43,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18362 conditions, 3739 events. 2467/3739 cut-off events. For 42595/42595 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18537 event pairs, 850 based on Foata normal form. 1/3739 useless extension candidates. Maximal degree in co-relation 18322. Up to 3702 conditions per place. [2024-06-27 20:06:43,485 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 97 selfloop transitions, 16 changer transitions 0/116 dead transitions. [2024-06-27 20:06:43,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 116 transitions, 1188 flow [2024-06-27 20:06:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:06:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:06:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-27 20:06:43,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-27 20:06:43,487 INFO L175 Difference]: Start difference. First operand has 94 places, 94 transitions, 834 flow. Second operand 6 states and 104 transitions. [2024-06-27 20:06:43,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 116 transitions, 1188 flow [2024-06-27 20:06:43,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 116 transitions, 1106 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:06:43,522 INFO L231 Difference]: Finished difference. Result has 93 places, 100 transitions, 852 flow [2024-06-27 20:06:43,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=852, PETRI_PLACES=93, PETRI_TRANSITIONS=100} [2024-06-27 20:06:43,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-27 20:06:43,523 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 100 transitions, 852 flow [2024-06-27 20:06:43,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:43,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:43,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:43,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:06:43,524 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:43,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:43,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1514565624, now seen corresponding path program 1 times [2024-06-27 20:06:43,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:43,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792628492] [2024-06-27 20:06:43,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:43,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:43,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:44,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:44,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792628492] [2024-06-27 20:06:44,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792628492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:44,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:44,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:44,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150183960] [2024-06-27 20:06:44,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:44,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:44,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:44,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:44,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:44,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:06:44,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 100 transitions, 852 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:44,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:44,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:06:44,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:45,025 INFO L124 PetriNetUnfolderBase]: 2364/3646 cut-off events. [2024-06-27 20:06:45,025 INFO L125 PetriNetUnfolderBase]: For 47493/47493 co-relation queries the response was YES. [2024-06-27 20:06:45,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18245 conditions, 3646 events. 2364/3646 cut-off events. For 47493/47493 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18569 event pairs, 801 based on Foata normal form. 4/3649 useless extension candidates. Maximal degree in co-relation 18204. Up to 3471 conditions per place. [2024-06-27 20:06:45,047 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 104 selfloop transitions, 16 changer transitions 0/127 dead transitions. [2024-06-27 20:06:45,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 127 transitions, 1188 flow [2024-06-27 20:06:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:45,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:45,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:06:45,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 20:06:45,048 INFO L175 Difference]: Start difference. First operand has 93 places, 100 transitions, 852 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:06:45,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 127 transitions, 1188 flow [2024-06-27 20:06:45,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 127 transitions, 1158 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-27 20:06:45,083 INFO L231 Difference]: Finished difference. Result has 99 places, 102 transitions, 897 flow [2024-06-27 20:06:45,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=822, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=897, PETRI_PLACES=99, PETRI_TRANSITIONS=102} [2024-06-27 20:06:45,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2024-06-27 20:06:45,084 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 102 transitions, 897 flow [2024-06-27 20:06:45,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:45,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:45,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:45,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:06:45,085 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:45,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:45,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1505994744, now seen corresponding path program 2 times [2024-06-27 20:06:45,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:45,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722173661] [2024-06-27 20:06:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:45,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:45,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:45,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:45,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722173661] [2024-06-27 20:06:45,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722173661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:45,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:45,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:45,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231730292] [2024-06-27 20:06:45,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:45,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:45,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:45,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:45,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:46,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:06:46,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 102 transitions, 897 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:46,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:46,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:06:46,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:46,698 INFO L124 PetriNetUnfolderBase]: 2381/3673 cut-off events. [2024-06-27 20:06:46,698 INFO L125 PetriNetUnfolderBase]: For 53036/53036 co-relation queries the response was YES. [2024-06-27 20:06:46,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18872 conditions, 3673 events. 2381/3673 cut-off events. For 53036/53036 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18742 event pairs, 748 based on Foata normal form. 4/3676 useless extension candidates. Maximal degree in co-relation 18829. Up to 3484 conditions per place. [2024-06-27 20:06:46,718 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 105 selfloop transitions, 17 changer transitions 0/129 dead transitions. [2024-06-27 20:06:46,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 129 transitions, 1233 flow [2024-06-27 20:06:46,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:46,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:06:46,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 20:06:46,720 INFO L175 Difference]: Start difference. First operand has 99 places, 102 transitions, 897 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:06:46,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 129 transitions, 1233 flow [2024-06-27 20:06:46,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 129 transitions, 1174 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:46,752 INFO L231 Difference]: Finished difference. Result has 101 places, 104 transitions, 913 flow [2024-06-27 20:06:46,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=913, PETRI_PLACES=101, PETRI_TRANSITIONS=104} [2024-06-27 20:06:46,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-27 20:06:46,753 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 104 transitions, 913 flow [2024-06-27 20:06:46,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:46,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:46,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:46,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:06:46,754 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:46,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:46,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1506291414, now seen corresponding path program 3 times [2024-06-27 20:06:46,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:46,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513494463] [2024-06-27 20:06:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:46,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:47,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:47,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513494463] [2024-06-27 20:06:47,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513494463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:47,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:47,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:47,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267408556] [2024-06-27 20:06:47,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:47,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:47,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:47,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:47,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:47,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:06:47,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 104 transitions, 913 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:47,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:47,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:06:47,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:48,428 INFO L124 PetriNetUnfolderBase]: 2373/3661 cut-off events. [2024-06-27 20:06:48,428 INFO L125 PetriNetUnfolderBase]: For 57659/57659 co-relation queries the response was YES. [2024-06-27 20:06:48,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19109 conditions, 3661 events. 2373/3661 cut-off events. For 57659/57659 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 18673 event pairs, 795 based on Foata normal form. 4/3664 useless extension candidates. Maximal degree in co-relation 19065. Up to 3450 conditions per place. [2024-06-27 20:06:48,450 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 101 selfloop transitions, 23 changer transitions 0/131 dead transitions. [2024-06-27 20:06:48,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 131 transitions, 1259 flow [2024-06-27 20:06:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:06:48,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 20:06:48,451 INFO L175 Difference]: Start difference. First operand has 101 places, 104 transitions, 913 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:06:48,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 131 transitions, 1259 flow [2024-06-27 20:06:48,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 131 transitions, 1202 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:48,491 INFO L231 Difference]: Finished difference. Result has 103 places, 106 transitions, 950 flow [2024-06-27 20:06:48,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=950, PETRI_PLACES=103, PETRI_TRANSITIONS=106} [2024-06-27 20:06:48,492 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 61 predicate places. [2024-06-27 20:06:48,492 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 106 transitions, 950 flow [2024-06-27 20:06:48,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:48,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:48,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:48,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:06:48,493 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:48,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:48,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1465795622, now seen corresponding path program 4 times [2024-06-27 20:06:48,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:48,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004066517] [2024-06-27 20:06:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:48,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:48,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:49,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:49,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:49,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004066517] [2024-06-27 20:06:49,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004066517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:49,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:49,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:49,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200118953] [2024-06-27 20:06:49,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:49,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:49,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:49,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:49,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:49,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:06:49,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 106 transitions, 950 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:49,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:49,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:06:49,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:50,002 INFO L124 PetriNetUnfolderBase]: 2365/3649 cut-off events. [2024-06-27 20:06:50,002 INFO L125 PetriNetUnfolderBase]: For 62596/62596 co-relation queries the response was YES. [2024-06-27 20:06:50,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19352 conditions, 3649 events. 2365/3649 cut-off events. For 62596/62596 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18588 event pairs, 793 based on Foata normal form. 4/3652 useless extension candidates. Maximal degree in co-relation 19307. Up to 3447 conditions per place. [2024-06-27 20:06:50,024 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 109 selfloop transitions, 21 changer transitions 0/137 dead transitions. [2024-06-27 20:06:50,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 137 transitions, 1345 flow [2024-06-27 20:06:50,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:50,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:50,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:06:50,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 20:06:50,025 INFO L175 Difference]: Start difference. First operand has 103 places, 106 transitions, 950 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:06:50,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 137 transitions, 1345 flow [2024-06-27 20:06:50,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 137 transitions, 1279 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:50,058 INFO L231 Difference]: Finished difference. Result has 106 places, 111 transitions, 1014 flow [2024-06-27 20:06:50,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1014, PETRI_PLACES=106, PETRI_TRANSITIONS=111} [2024-06-27 20:06:50,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-27 20:06:50,058 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 111 transitions, 1014 flow [2024-06-27 20:06:50,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:50,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:50,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:50,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:06:50,059 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:50,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:50,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1229620510, now seen corresponding path program 1 times [2024-06-27 20:06:50,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:50,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160505771] [2024-06-27 20:06:50,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:50,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:50,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:50,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160505771] [2024-06-27 20:06:50,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160505771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:50,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:50,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:06:50,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929226845] [2024-06-27 20:06:50,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:50,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:06:50,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:50,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:06:50,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:06:50,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:06:50,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 111 transitions, 1014 flow. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-27 20:06:50,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:50,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:06:50,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:51,414 INFO L124 PetriNetUnfolderBase]: 2357/3639 cut-off events. [2024-06-27 20:06:51,414 INFO L125 PetriNetUnfolderBase]: For 68293/68296 co-relation queries the response was YES. [2024-06-27 20:06:51,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19772 conditions, 3639 events. 2357/3639 cut-off events. For 68293/68296 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18556 event pairs, 669 based on Foata normal form. 2/3638 useless extension candidates. Maximal degree in co-relation 19725. Up to 3280 conditions per place. [2024-06-27 20:06:51,436 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 94 selfloop transitions, 35 changer transitions 0/136 dead transitions. [2024-06-27 20:06:51,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 136 transitions, 1346 flow [2024-06-27 20:06:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:06:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:06:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-27 20:06:51,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:06:51,437 INFO L175 Difference]: Start difference. First operand has 106 places, 111 transitions, 1014 flow. Second operand 6 states and 123 transitions. [2024-06-27 20:06:51,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 136 transitions, 1346 flow [2024-06-27 20:06:51,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 136 transitions, 1263 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 20:06:51,489 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 1018 flow [2024-06-27 20:06:51,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=931, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1018, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2024-06-27 20:06:51,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-27 20:06:51,489 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 1018 flow [2024-06-27 20:06:51,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 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) [2024-06-27 20:06:51,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:51,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:51,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:06:51,490 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:51,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:51,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1386776354, now seen corresponding path program 2 times [2024-06-27 20:06:51,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:51,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464835823] [2024-06-27 20:06:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:51,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:51,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:51,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:51,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464835823] [2024-06-27 20:06:51,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464835823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:51,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:51,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:06:51,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267217118] [2024-06-27 20:06:51,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:51,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:06:51,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:51,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:06:51,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:06:51,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:06:52,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 1018 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:52,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:52,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:06:52,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:52,441 INFO L124 PetriNetUnfolderBase]: 2474/3753 cut-off events. [2024-06-27 20:06:52,441 INFO L125 PetriNetUnfolderBase]: For 72348/72348 co-relation queries the response was YES. [2024-06-27 20:06:52,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20479 conditions, 3753 events. 2474/3753 cut-off events. For 72348/72348 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18571 event pairs, 839 based on Foata normal form. 1/3753 useless extension candidates. Maximal degree in co-relation 20431. Up to 3735 conditions per place. [2024-06-27 20:06:52,463 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 106 selfloop transitions, 11 changer transitions 0/120 dead transitions. [2024-06-27 20:06:52,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 120 transitions, 1274 flow [2024-06-27 20:06:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:06:52,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:06:52,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-27 20:06:52,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-27 20:06:52,464 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 1018 flow. Second operand 6 states and 95 transitions. [2024-06-27 20:06:52,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 120 transitions, 1274 flow [2024-06-27 20:06:52,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 120 transitions, 1188 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 20:06:52,521 INFO L231 Difference]: Finished difference. Result has 108 places, 111 transitions, 960 flow [2024-06-27 20:06:52,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=960, PETRI_PLACES=108, PETRI_TRANSITIONS=111} [2024-06-27 20:06:52,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-27 20:06:52,521 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 960 flow [2024-06-27 20:06:52,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:52,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:52,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:52,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:06:52,522 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:52,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:52,522 INFO L85 PathProgramCache]: Analyzing trace with hash 204099370, now seen corresponding path program 1 times [2024-06-27 20:06:52,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:52,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437922939] [2024-06-27 20:06:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:52,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:52,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:52,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437922939] [2024-06-27 20:06:52,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437922939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:52,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:52,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:06:52,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915101869] [2024-06-27 20:06:52,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:52,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:06:52,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:52,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:06:52,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:06:53,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:06:53,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 111 transitions, 960 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:53,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:53,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:06:53,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:53,564 INFO L124 PetriNetUnfolderBase]: 2479/3760 cut-off events. [2024-06-27 20:06:53,564 INFO L125 PetriNetUnfolderBase]: For 76576/76576 co-relation queries the response was YES. [2024-06-27 20:06:53,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20552 conditions, 3760 events. 2479/3760 cut-off events. For 76576/76576 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18621 event pairs, 839 based on Foata normal form. 1/3760 useless extension candidates. Maximal degree in co-relation 20503. Up to 3729 conditions per place. [2024-06-27 20:06:53,588 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 111 selfloop transitions, 16 changer transitions 0/130 dead transitions. [2024-06-27 20:06:53,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 130 transitions, 1344 flow [2024-06-27 20:06:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:06:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:06:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 20:06:53,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-27 20:06:53,589 INFO L175 Difference]: Start difference. First operand has 108 places, 111 transitions, 960 flow. Second operand 6 states and 101 transitions. [2024-06-27 20:06:53,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 130 transitions, 1344 flow [2024-06-27 20:06:53,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 130 transitions, 1312 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 20:06:53,634 INFO L231 Difference]: Finished difference. Result has 109 places, 117 transitions, 1024 flow [2024-06-27 20:06:53,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1024, PETRI_PLACES=109, PETRI_TRANSITIONS=117} [2024-06-27 20:06:53,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-27 20:06:53,635 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 117 transitions, 1024 flow [2024-06-27 20:06:53,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:53,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:53,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:53,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:06:53,635 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:53,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:53,635 INFO L85 PathProgramCache]: Analyzing trace with hash -899687552, now seen corresponding path program 2 times [2024-06-27 20:06:53,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:53,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977891900] [2024-06-27 20:06:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:53,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:54,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:54,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:54,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977891900] [2024-06-27 20:06:54,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977891900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:54,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:54,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:06:54,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306016612] [2024-06-27 20:06:54,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:54,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:06:54,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:54,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:06:54,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:06:54,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:06:54,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 117 transitions, 1024 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:54,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:54,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:06:54,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:54,666 INFO L124 PetriNetUnfolderBase]: 2476/3757 cut-off events. [2024-06-27 20:06:54,666 INFO L125 PetriNetUnfolderBase]: For 82843/82846 co-relation queries the response was YES. [2024-06-27 20:06:54,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21116 conditions, 3757 events. 2476/3757 cut-off events. For 82843/82846 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 18624 event pairs, 842 based on Foata normal form. 3/3758 useless extension candidates. Maximal degree in co-relation 21066. Up to 3726 conditions per place. [2024-06-27 20:06:54,687 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 107 selfloop transitions, 16 changer transitions 0/126 dead transitions. [2024-06-27 20:06:54,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 126 transitions, 1292 flow [2024-06-27 20:06:54,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:06:54,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:06:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-27 20:06:54,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-27 20:06:54,688 INFO L175 Difference]: Start difference. First operand has 109 places, 117 transitions, 1024 flow. Second operand 6 states and 97 transitions. [2024-06-27 20:06:54,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 126 transitions, 1292 flow [2024-06-27 20:06:54,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 126 transitions, 1248 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 20:06:54,738 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 1018 flow [2024-06-27 20:06:54,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1018, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2024-06-27 20:06:54,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-27 20:06:54,738 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 1018 flow [2024-06-27 20:06:54,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:54,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:54,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:54,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:06:54,739 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:54,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:54,739 INFO L85 PathProgramCache]: Analyzing trace with hash -394954166, now seen corresponding path program 1 times [2024-06-27 20:06:54,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:54,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421036152] [2024-06-27 20:06:54,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:54,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:55,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:55,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:55,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421036152] [2024-06-27 20:06:55,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421036152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:55,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:55,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:06:55,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136616671] [2024-06-27 20:06:55,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:55,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:06:55,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:55,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:06:55,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:06:55,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:06:55,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 1018 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:55,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:55,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:06:55,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:55,868 INFO L124 PetriNetUnfolderBase]: 2494/3782 cut-off events. [2024-06-27 20:06:55,868 INFO L125 PetriNetUnfolderBase]: For 88693/88696 co-relation queries the response was YES. [2024-06-27 20:06:55,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21319 conditions, 3782 events. 2494/3782 cut-off events. For 88693/88696 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18737 event pairs, 772 based on Foata normal form. 4/3784 useless extension candidates. Maximal degree in co-relation 21267. Up to 3634 conditions per place. [2024-06-27 20:06:55,888 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 37 changer transitions 0/158 dead transitions. [2024-06-27 20:06:55,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 158 transitions, 1654 flow [2024-06-27 20:06:55,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:06:55,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:06:55,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 20:06:55,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-27 20:06:55,889 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 1018 flow. Second operand 7 states and 129 transitions. [2024-06-27 20:06:55,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 158 transitions, 1654 flow [2024-06-27 20:06:55,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 158 transitions, 1608 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:06:55,950 INFO L231 Difference]: Finished difference. Result has 116 places, 133 transitions, 1262 flow [2024-06-27 20:06:55,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=972, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1262, PETRI_PLACES=116, PETRI_TRANSITIONS=133} [2024-06-27 20:06:55,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-27 20:06:55,950 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 133 transitions, 1262 flow [2024-06-27 20:06:55,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:55,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:55,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:55,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:06:55,951 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:55,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:55,951 INFO L85 PathProgramCache]: Analyzing trace with hash -1474228690, now seen corresponding path program 1 times [2024-06-27 20:06:55,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:55,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930383135] [2024-06-27 20:06:55,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:55,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:56,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:56,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:56,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930383135] [2024-06-27 20:06:56,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930383135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:56,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:56,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:06:56,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818121928] [2024-06-27 20:06:56,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:56,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:06:56,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:56,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:06:56,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:06:56,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:06:56,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 133 transitions, 1262 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:56,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:56,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:06:56,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:57,509 INFO L124 PetriNetUnfolderBase]: 2462/3781 cut-off events. [2024-06-27 20:06:57,509 INFO L125 PetriNetUnfolderBase]: For 99752/99755 co-relation queries the response was YES. [2024-06-27 20:06:57,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22530 conditions, 3781 events. 2462/3781 cut-off events. For 99752/99755 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19167 event pairs, 687 based on Foata normal form. 6/3774 useless extension candidates. Maximal degree in co-relation 22476. Up to 3328 conditions per place. [2024-06-27 20:06:57,534 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 123 selfloop transitions, 39 changer transitions 0/174 dead transitions. [2024-06-27 20:06:57,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 174 transitions, 1793 flow [2024-06-27 20:06:57,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:06:57,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:06:57,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:06:57,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-27 20:06:57,535 INFO L175 Difference]: Start difference. First operand has 116 places, 133 transitions, 1262 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:06:57,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 174 transitions, 1793 flow [2024-06-27 20:06:57,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 174 transitions, 1727 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-27 20:06:57,597 INFO L231 Difference]: Finished difference. Result has 124 places, 144 transitions, 1449 flow [2024-06-27 20:06:57,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1202, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1449, PETRI_PLACES=124, PETRI_TRANSITIONS=144} [2024-06-27 20:06:57,597 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-27 20:06:57,597 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 144 transitions, 1449 flow [2024-06-27 20:06:57,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:57,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:57,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:57,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:06:57,598 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:57,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:57,598 INFO L85 PathProgramCache]: Analyzing trace with hash -600663864, now seen corresponding path program 2 times [2024-06-27 20:06:57,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:57,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820184839] [2024-06-27 20:06:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:57,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:58,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:58,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:58,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820184839] [2024-06-27 20:06:58,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820184839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:58,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:58,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:06:58,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088768956] [2024-06-27 20:06:58,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:58,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:06:58,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:58,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:06:58,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:06:58,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:06:58,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 144 transitions, 1449 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:58,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:58,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:06:58,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:58,699 INFO L124 PetriNetUnfolderBase]: 2578/3907 cut-off events. [2024-06-27 20:06:58,699 INFO L125 PetriNetUnfolderBase]: For 105790/105793 co-relation queries the response was YES. [2024-06-27 20:06:58,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23875 conditions, 3907 events. 2578/3907 cut-off events. For 105790/105793 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 19429 event pairs, 784 based on Foata normal form. 4/3909 useless extension candidates. Maximal degree in co-relation 23817. Up to 3748 conditions per place. [2024-06-27 20:06:58,723 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 125 selfloop transitions, 42 changer transitions 0/170 dead transitions. [2024-06-27 20:06:58,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 170 transitions, 2025 flow [2024-06-27 20:06:58,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:06:58,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:06:58,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:06:58,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:06:58,725 INFO L175 Difference]: Start difference. First operand has 124 places, 144 transitions, 1449 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:06:58,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 170 transitions, 2025 flow [2024-06-27 20:06:58,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 170 transitions, 1967 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 20:06:58,791 INFO L231 Difference]: Finished difference. Result has 130 places, 152 transitions, 1591 flow [2024-06-27 20:06:58,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1391, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1591, PETRI_PLACES=130, PETRI_TRANSITIONS=152} [2024-06-27 20:06:58,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-27 20:06:58,791 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 152 transitions, 1591 flow [2024-06-27 20:06:58,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:58,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:06:58,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:06:58,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:06:58,792 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:06:58,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:06:58,792 INFO L85 PathProgramCache]: Analyzing trace with hash -394655264, now seen corresponding path program 1 times [2024-06-27 20:06:58,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:06:58,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734845751] [2024-06-27 20:06:58,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:06:58,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:06:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:06:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:06:59,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:06:59,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734845751] [2024-06-27 20:06:59,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734845751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:06:59,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:06:59,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:06:59,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13776026] [2024-06-27 20:06:59,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:06:59,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:06:59,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:06:59,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:06:59,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:06:59,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:06:59,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 152 transitions, 1591 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:06:59,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:06:59,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:06:59,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:06:59,945 INFO L124 PetriNetUnfolderBase]: 2609/3949 cut-off events. [2024-06-27 20:06:59,945 INFO L125 PetriNetUnfolderBase]: For 114122/114122 co-relation queries the response was YES. [2024-06-27 20:06:59,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24507 conditions, 3949 events. 2609/3949 cut-off events. For 114122/114122 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 19641 event pairs, 783 based on Foata normal form. 3/3951 useless extension candidates. Maximal degree in co-relation 24446. Up to 3885 conditions per place. [2024-06-27 20:06:59,968 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 23 changer transitions 0/182 dead transitions. [2024-06-27 20:06:59,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 182 transitions, 2153 flow [2024-06-27 20:06:59,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:06:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:06:59,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 20:06:59,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-27 20:06:59,970 INFO L175 Difference]: Start difference. First operand has 130 places, 152 transitions, 1591 flow. Second operand 7 states and 122 transitions. [2024-06-27 20:06:59,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 182 transitions, 2153 flow [2024-06-27 20:07:00,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 182 transitions, 2080 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 20:07:00,060 INFO L231 Difference]: Finished difference. Result has 135 places, 161 transitions, 1688 flow [2024-06-27 20:07:00,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1518, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1688, PETRI_PLACES=135, PETRI_TRANSITIONS=161} [2024-06-27 20:07:00,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 93 predicate places. [2024-06-27 20:07:00,061 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 161 transitions, 1688 flow [2024-06-27 20:07:00,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:00,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:00,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:00,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:07:00,061 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:00,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:00,062 INFO L85 PathProgramCache]: Analyzing trace with hash 279978540, now seen corresponding path program 2 times [2024-06-27 20:07:00,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:00,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79307587] [2024-06-27 20:07:00,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:00,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:00,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:00,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79307587] [2024-06-27 20:07:00,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79307587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:00,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:00,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:00,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493029018] [2024-06-27 20:07:00,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:00,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:00,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:00,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:00,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:01,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:07:01,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 161 transitions, 1688 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:01,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:01,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:07:01,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:01,606 INFO L124 PetriNetUnfolderBase]: 2512/3850 cut-off events. [2024-06-27 20:07:01,606 INFO L125 PetriNetUnfolderBase]: For 123200/123203 co-relation queries the response was YES. [2024-06-27 20:07:01,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24632 conditions, 3850 events. 2512/3850 cut-off events. For 123200/123203 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 19526 event pairs, 683 based on Foata normal form. 6/3843 useless extension candidates. Maximal degree in co-relation 24569. Up to 3327 conditions per place. [2024-06-27 20:07:01,632 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 134 selfloop transitions, 42 changer transitions 0/190 dead transitions. [2024-06-27 20:07:01,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 190 transitions, 2164 flow [2024-06-27 20:07:01,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:01,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:01,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-27 20:07:01,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-27 20:07:01,633 INFO L175 Difference]: Start difference. First operand has 135 places, 161 transitions, 1688 flow. Second operand 7 states and 133 transitions. [2024-06-27 20:07:01,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 190 transitions, 2164 flow [2024-06-27 20:07:01,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 190 transitions, 2120 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 20:07:01,747 INFO L231 Difference]: Finished difference. Result has 141 places, 165 transitions, 1820 flow [2024-06-27 20:07:01,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1820, PETRI_PLACES=141, PETRI_TRANSITIONS=165} [2024-06-27 20:07:01,748 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-27 20:07:01,748 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 165 transitions, 1820 flow [2024-06-27 20:07:01,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:01,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:01,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:01,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:07:01,748 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:01,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:01,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1026836046, now seen corresponding path program 3 times [2024-06-27 20:07:01,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:01,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009036635] [2024-06-27 20:07:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:01,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:02,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:02,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009036635] [2024-06-27 20:07:02,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009036635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:02,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:02,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:02,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400454023] [2024-06-27 20:07:02,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:02,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:02,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:02,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:02,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:02,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:07:02,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 165 transitions, 1820 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:02,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:02,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:07:02,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:03,300 INFO L124 PetriNetUnfolderBase]: 2521/3869 cut-off events. [2024-06-27 20:07:03,300 INFO L125 PetriNetUnfolderBase]: For 130880/130883 co-relation queries the response was YES. [2024-06-27 20:07:03,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25354 conditions, 3869 events. 2521/3869 cut-off events. For 130880/130883 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19641 event pairs, 707 based on Foata normal form. 4/3870 useless extension candidates. Maximal degree in co-relation 25287. Up to 3637 conditions per place. [2024-06-27 20:07:03,330 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 158 selfloop transitions, 17 changer transitions 0/189 dead transitions. [2024-06-27 20:07:03,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 189 transitions, 2258 flow [2024-06-27 20:07:03,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:03,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:03,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:07:03,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:07:03,332 INFO L175 Difference]: Start difference. First operand has 141 places, 165 transitions, 1820 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:07:03,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 189 transitions, 2258 flow [2024-06-27 20:07:03,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 189 transitions, 2178 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 20:07:03,475 INFO L231 Difference]: Finished difference. Result has 145 places, 167 transitions, 1819 flow [2024-06-27 20:07:03,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1742, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1819, PETRI_PLACES=145, PETRI_TRANSITIONS=167} [2024-06-27 20:07:03,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-27 20:07:03,476 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 167 transitions, 1819 flow [2024-06-27 20:07:03,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:03,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:03,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:03,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:07:03,477 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:03,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:03,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1017639276, now seen corresponding path program 4 times [2024-06-27 20:07:03,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:03,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399223327] [2024-06-27 20:07:03,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:03,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:04,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:04,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:04,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399223327] [2024-06-27 20:07:04,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399223327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:04,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:04,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:04,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554309785] [2024-06-27 20:07:04,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:04,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:04,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:04,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:04,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:04,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:07:04,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 167 transitions, 1819 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:04,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:04,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:07:04,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:05,160 INFO L124 PetriNetUnfolderBase]: 2546/3904 cut-off events. [2024-06-27 20:07:05,160 INFO L125 PetriNetUnfolderBase]: For 131484/131487 co-relation queries the response was YES. [2024-06-27 20:07:05,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25570 conditions, 3904 events. 2546/3904 cut-off events. For 131484/131487 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19882 event pairs, 678 based on Foata normal form. 4/3895 useless extension candidates. Maximal degree in co-relation 25501. Up to 3289 conditions per place. [2024-06-27 20:07:05,190 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 129 selfloop transitions, 55 changer transitions 0/198 dead transitions. [2024-06-27 20:07:05,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 198 transitions, 2429 flow [2024-06-27 20:07:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-27 20:07:05,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-27 20:07:05,192 INFO L175 Difference]: Start difference. First operand has 145 places, 167 transitions, 1819 flow. Second operand 7 states and 136 transitions. [2024-06-27 20:07:05,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 198 transitions, 2429 flow [2024-06-27 20:07:05,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 198 transitions, 2370 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-27 20:07:05,299 INFO L231 Difference]: Finished difference. Result has 147 places, 171 transitions, 1960 flow [2024-06-27 20:07:05,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1960, PETRI_PLACES=147, PETRI_TRANSITIONS=171} [2024-06-27 20:07:05,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-27 20:07:05,299 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 171 transitions, 1960 flow [2024-06-27 20:07:05,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:05,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:05,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:05,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:07:05,300 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:05,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:05,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2137728, now seen corresponding path program 5 times [2024-06-27 20:07:05,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:05,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545477768] [2024-06-27 20:07:05,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:05,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:05,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:06,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:06,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:06,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545477768] [2024-06-27 20:07:06,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545477768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:06,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:06,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:06,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387210820] [2024-06-27 20:07:06,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:06,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:06,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:06,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:06,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:06,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:07:06,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 171 transitions, 1960 flow. Second operand has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:06,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:06,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:07:06,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:06,845 INFO L124 PetriNetUnfolderBase]: 2530/3884 cut-off events. [2024-06-27 20:07:06,845 INFO L125 PetriNetUnfolderBase]: For 137728/137731 co-relation queries the response was YES. [2024-06-27 20:07:06,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25891 conditions, 3884 events. 2530/3884 cut-off events. For 137728/137731 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19777 event pairs, 690 based on Foata normal form. 4/3885 useless extension candidates. Maximal degree in co-relation 25821. Up to 3440 conditions per place. [2024-06-27 20:07:06,875 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 137 selfloop transitions, 49 changer transitions 0/200 dead transitions. [2024-06-27 20:07:06,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 200 transitions, 2416 flow [2024-06-27 20:07:06,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:06,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:06,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 20:07:06,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843205574912892 [2024-06-27 20:07:06,876 INFO L175 Difference]: Start difference. First operand has 147 places, 171 transitions, 1960 flow. Second operand 7 states and 139 transitions. [2024-06-27 20:07:06,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 200 transitions, 2416 flow [2024-06-27 20:07:07,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 200 transitions, 2322 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 20:07:07,022 INFO L231 Difference]: Finished difference. Result has 151 places, 172 transitions, 1989 flow [2024-06-27 20:07:07,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1989, PETRI_PLACES=151, PETRI_TRANSITIONS=172} [2024-06-27 20:07:07,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-27 20:07:07,022 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 172 transitions, 1989 flow [2024-06-27 20:07:07,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.4) internal successors, (104), 10 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:07,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:07,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:07,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:07:07,023 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:07,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:07,023 INFO L85 PathProgramCache]: Analyzing trace with hash -40392224, now seen corresponding path program 2 times [2024-06-27 20:07:07,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:07,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080757086] [2024-06-27 20:07:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:07,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:07,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:07,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080757086] [2024-06-27 20:07:07,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080757086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:07,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:07,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:07,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554222172] [2024-06-27 20:07:07,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:07,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:07,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:07,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:07,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:07,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:07,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 172 transitions, 1989 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:07,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:07,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:07,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:08,174 INFO L124 PetriNetUnfolderBase]: 2642/4000 cut-off events. [2024-06-27 20:07:08,174 INFO L125 PetriNetUnfolderBase]: For 143603/143603 co-relation queries the response was YES. [2024-06-27 20:07:08,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26739 conditions, 4000 events. 2642/4000 cut-off events. For 143603/143603 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19929 event pairs, 773 based on Foata normal form. 3/4002 useless extension candidates. Maximal degree in co-relation 26667. Up to 3956 conditions per place. [2024-06-27 20:07:08,258 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 168 selfloop transitions, 19 changer transitions 0/190 dead transitions. [2024-06-27 20:07:08,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 190 transitions, 2515 flow [2024-06-27 20:07:08,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:08,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 20:07:08,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-27 20:07:08,259 INFO L175 Difference]: Start difference. First operand has 151 places, 172 transitions, 1989 flow. Second operand 7 states and 114 transitions. [2024-06-27 20:07:08,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 190 transitions, 2515 flow [2024-06-27 20:07:08,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 190 transitions, 2402 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 20:07:08,357 INFO L231 Difference]: Finished difference. Result has 152 places, 175 transitions, 1970 flow [2024-06-27 20:07:08,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1876, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1970, PETRI_PLACES=152, PETRI_TRANSITIONS=175} [2024-06-27 20:07:08,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-27 20:07:08,357 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 175 transitions, 1970 flow [2024-06-27 20:07:08,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:08,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:08,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:08,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:07:08,358 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:08,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:08,358 INFO L85 PathProgramCache]: Analyzing trace with hash -40392596, now seen corresponding path program 3 times [2024-06-27 20:07:08,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:08,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56066766] [2024-06-27 20:07:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:08,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:08,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:08,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:08,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56066766] [2024-06-27 20:07:08,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56066766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:08,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:08,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:08,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745091589] [2024-06-27 20:07:08,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:08,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:08,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:08,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:08,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 175 transitions, 1970 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:08,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:08,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:08,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:09,515 INFO L124 PetriNetUnfolderBase]: 2638/3996 cut-off events. [2024-06-27 20:07:09,515 INFO L125 PetriNetUnfolderBase]: For 148736/148739 co-relation queries the response was YES. [2024-06-27 20:07:09,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26659 conditions, 3996 events. 2638/3996 cut-off events. For 148736/148739 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19941 event pairs, 780 based on Foata normal form. 4/3998 useless extension candidates. Maximal degree in co-relation 26586. Up to 3943 conditions per place. [2024-06-27 20:07:09,548 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 25 changer transitions 0/186 dead transitions. [2024-06-27 20:07:09,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 186 transitions, 2428 flow [2024-06-27 20:07:09,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:09,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 20:07:09,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-27 20:07:09,549 INFO L175 Difference]: Start difference. First operand has 152 places, 175 transitions, 1970 flow. Second operand 7 states and 113 transitions. [2024-06-27 20:07:09,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 186 transitions, 2428 flow [2024-06-27 20:07:09,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 186 transitions, 2332 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:07:09,682 INFO L231 Difference]: Finished difference. Result has 154 places, 175 transitions, 1932 flow [2024-06-27 20:07:09,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1932, PETRI_PLACES=154, PETRI_TRANSITIONS=175} [2024-06-27 20:07:09,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-27 20:07:09,683 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 175 transitions, 1932 flow [2024-06-27 20:07:09,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:09,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:09,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:09,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:07:09,683 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:09,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:09,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1675988608, now seen corresponding path program 3 times [2024-06-27 20:07:09,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:09,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431436075] [2024-06-27 20:07:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:09,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:09,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:10,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:10,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431436075] [2024-06-27 20:07:10,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431436075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:10,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:10,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:10,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634966256] [2024-06-27 20:07:10,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:10,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:10,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:10,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:10,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:10,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:10,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 175 transitions, 1932 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:10,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:10,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:10,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:10,845 INFO L124 PetriNetUnfolderBase]: 2629/3983 cut-off events. [2024-06-27 20:07:10,845 INFO L125 PetriNetUnfolderBase]: For 154524/154524 co-relation queries the response was YES. [2024-06-27 20:07:10,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26583 conditions, 3983 events. 2629/3983 cut-off events. For 154524/154524 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19872 event pairs, 774 based on Foata normal form. 3/3985 useless extension candidates. Maximal degree in co-relation 26510. Up to 3956 conditions per place. [2024-06-27 20:07:10,879 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 170 selfloop transitions, 14 changer transitions 0/187 dead transitions. [2024-06-27 20:07:10,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 187 transitions, 2330 flow [2024-06-27 20:07:10,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:10,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-27 20:07:10,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-27 20:07:10,880 INFO L175 Difference]: Start difference. First operand has 154 places, 175 transitions, 1932 flow. Second operand 7 states and 109 transitions. [2024-06-27 20:07:10,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 187 transitions, 2330 flow [2024-06-27 20:07:11,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 187 transitions, 2217 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:07:11,043 INFO L231 Difference]: Finished difference. Result has 155 places, 175 transitions, 1853 flow [2024-06-27 20:07:11,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1853, PETRI_PLACES=155, PETRI_TRANSITIONS=175} [2024-06-27 20:07:11,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-27 20:07:11,043 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 175 transitions, 1853 flow [2024-06-27 20:07:11,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:11,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:11,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:11,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:07:11,044 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:11,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:11,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1669323484, now seen corresponding path program 1 times [2024-06-27 20:07:11,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:11,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965505956] [2024-06-27 20:07:11,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:11,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:11,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:11,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:11,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:11,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965505956] [2024-06-27 20:07:11,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965505956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:11,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:11,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:11,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979312327] [2024-06-27 20:07:11,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:11,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:11,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:11,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:11,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:11,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:11,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 175 transitions, 1853 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:11,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:11,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:11,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:12,350 INFO L124 PetriNetUnfolderBase]: 2639/3997 cut-off events. [2024-06-27 20:07:12,350 INFO L125 PetriNetUnfolderBase]: For 161154/161154 co-relation queries the response was YES. [2024-06-27 20:07:12,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26651 conditions, 3997 events. 2639/3997 cut-off events. For 161154/161154 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19918 event pairs, 773 based on Foata normal form. 2/3998 useless extension candidates. Maximal degree in co-relation 26579. Up to 3950 conditions per place. [2024-06-27 20:07:12,381 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 176 selfloop transitions, 16 changer transitions 0/195 dead transitions. [2024-06-27 20:07:12,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 195 transitions, 2315 flow [2024-06-27 20:07:12,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:12,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:07:12,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-27 20:07:12,382 INFO L175 Difference]: Start difference. First operand has 155 places, 175 transitions, 1853 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:07:12,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 195 transitions, 2315 flow [2024-06-27 20:07:12,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 195 transitions, 2252 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:12,494 INFO L231 Difference]: Finished difference. Result has 155 places, 178 transitions, 1869 flow [2024-06-27 20:07:12,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1790, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1869, PETRI_PLACES=155, PETRI_TRANSITIONS=178} [2024-06-27 20:07:12,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-27 20:07:12,495 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 178 transitions, 1869 flow [2024-06-27 20:07:12,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:12,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:12,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:12,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:07:12,495 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:12,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:12,495 INFO L85 PathProgramCache]: Analyzing trace with hash -217339418, now seen corresponding path program 2 times [2024-06-27 20:07:12,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:12,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392869950] [2024-06-27 20:07:12,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:12,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:13,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:13,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392869950] [2024-06-27 20:07:13,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392869950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:13,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:13,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:13,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784865693] [2024-06-27 20:07:13,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:13,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:13,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:13,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:13,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:13,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:13,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 178 transitions, 1869 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:13,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:13,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:13,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:13,852 INFO L124 PetriNetUnfolderBase]: 2649/4011 cut-off events. [2024-06-27 20:07:13,852 INFO L125 PetriNetUnfolderBase]: For 168756/168756 co-relation queries the response was YES. [2024-06-27 20:07:13,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27135 conditions, 4011 events. 2649/4011 cut-off events. For 168756/168756 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19990 event pairs, 774 based on Foata normal form. 2/4012 useless extension candidates. Maximal degree in co-relation 27063. Up to 3940 conditions per place. [2024-06-27 20:07:13,879 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 28 changer transitions 0/201 dead transitions. [2024-06-27 20:07:13,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 201 transitions, 2463 flow [2024-06-27 20:07:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:13,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:13,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 20:07:13,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-27 20:07:13,880 INFO L175 Difference]: Start difference. First operand has 155 places, 178 transitions, 1869 flow. Second operand 7 states and 118 transitions. [2024-06-27 20:07:13,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 201 transitions, 2463 flow [2024-06-27 20:07:14,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 201 transitions, 2410 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:07:14,020 INFO L231 Difference]: Finished difference. Result has 157 places, 184 transitions, 1964 flow [2024-06-27 20:07:14,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1816, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1964, PETRI_PLACES=157, PETRI_TRANSITIONS=184} [2024-06-27 20:07:14,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-27 20:07:14,020 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 184 transitions, 1964 flow [2024-06-27 20:07:14,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:14,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:14,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:14,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:07:14,021 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:14,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:14,021 INFO L85 PathProgramCache]: Analyzing trace with hash -217339232, now seen corresponding path program 1 times [2024-06-27 20:07:14,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:14,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195914999] [2024-06-27 20:07:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:14,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:14,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:14,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:14,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195914999] [2024-06-27 20:07:14,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195914999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:14,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:14,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617239910] [2024-06-27 20:07:14,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:14,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:14,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:14,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:14,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:14,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:14,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 184 transitions, 1964 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:14,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:14,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:14,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:15,359 INFO L124 PetriNetUnfolderBase]: 2664/4032 cut-off events. [2024-06-27 20:07:15,360 INFO L125 PetriNetUnfolderBase]: For 179711/179711 co-relation queries the response was YES. [2024-06-27 20:07:15,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27812 conditions, 4032 events. 2664/4032 cut-off events. For 179711/179711 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 20106 event pairs, 773 based on Foata normal form. 3/4034 useless extension candidates. Maximal degree in co-relation 27739. Up to 3964 conditions per place. [2024-06-27 20:07:15,390 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 181 selfloop transitions, 25 changer transitions 0/209 dead transitions. [2024-06-27 20:07:15,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 209 transitions, 2566 flow [2024-06-27 20:07:15,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:15,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:15,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 20:07:15,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42160278745644597 [2024-06-27 20:07:15,391 INFO L175 Difference]: Start difference. First operand has 157 places, 184 transitions, 1964 flow. Second operand 7 states and 121 transitions. [2024-06-27 20:07:15,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 209 transitions, 2566 flow [2024-06-27 20:07:15,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 209 transitions, 2509 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 20:07:15,544 INFO L231 Difference]: Finished difference. Result has 161 places, 190 transitions, 2037 flow [2024-06-27 20:07:15,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2037, PETRI_PLACES=161, PETRI_TRANSITIONS=190} [2024-06-27 20:07:15,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-27 20:07:15,545 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 190 transitions, 2037 flow [2024-06-27 20:07:15,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:15,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:15,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:15,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:07:15,545 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:15,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:15,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2120508732, now seen corresponding path program 3 times [2024-06-27 20:07:15,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:15,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318157418] [2024-06-27 20:07:15,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:15,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:16,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:16,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318157418] [2024-06-27 20:07:16,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318157418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:16,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:16,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:16,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400431626] [2024-06-27 20:07:16,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:16,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:16,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:16,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:16,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:16,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:16,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 190 transitions, 2037 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:16,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:16,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:16,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:16,974 INFO L124 PetriNetUnfolderBase]: 2658/4026 cut-off events. [2024-06-27 20:07:16,974 INFO L125 PetriNetUnfolderBase]: For 186301/186304 co-relation queries the response was YES. [2024-06-27 20:07:16,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28180 conditions, 4026 events. 2658/4026 cut-off events. For 186301/186304 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 20107 event pairs, 784 based on Foata normal form. 2/4025 useless extension candidates. Maximal degree in co-relation 28105. Up to 3956 conditions per place. [2024-06-27 20:07:17,006 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 171 selfloop transitions, 28 changer transitions 0/202 dead transitions. [2024-06-27 20:07:17,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 202 transitions, 2467 flow [2024-06-27 20:07:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:17,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:17,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 20:07:17,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-27 20:07:17,007 INFO L175 Difference]: Start difference. First operand has 161 places, 190 transitions, 2037 flow. Second operand 7 states and 114 transitions. [2024-06-27 20:07:17,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 202 transitions, 2467 flow [2024-06-27 20:07:17,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 202 transitions, 2403 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-27 20:07:17,169 INFO L231 Difference]: Finished difference. Result has 165 places, 190 transitions, 2035 flow [2024-06-27 20:07:17,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2035, PETRI_PLACES=165, PETRI_TRANSITIONS=190} [2024-06-27 20:07:17,170 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-27 20:07:17,170 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 190 transitions, 2035 flow [2024-06-27 20:07:17,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:17,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:17,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:17,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:07:17,170 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:17,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:17,171 INFO L85 PathProgramCache]: Analyzing trace with hash -39970562, now seen corresponding path program 2 times [2024-06-27 20:07:17,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:17,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41402645] [2024-06-27 20:07:17,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:17,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:17,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:17,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41402645] [2024-06-27 20:07:17,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41402645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:17,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:17,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:17,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455437518] [2024-06-27 20:07:17,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:17,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:17,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:17,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:17,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:17,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:17,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 190 transitions, 2035 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:17,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:17,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:17,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:18,506 INFO L124 PetriNetUnfolderBase]: 2673/4046 cut-off events. [2024-06-27 20:07:18,506 INFO L125 PetriNetUnfolderBase]: For 195312/195315 co-relation queries the response was YES. [2024-06-27 20:07:18,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28499 conditions, 4046 events. 2673/4046 cut-off events. For 195312/195315 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 20279 event pairs, 772 based on Foata normal form. 5/4049 useless extension candidates. Maximal degree in co-relation 28422. Up to 3970 conditions per place. [2024-06-27 20:07:18,535 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 176 selfloop transitions, 29 changer transitions 0/208 dead transitions. [2024-06-27 20:07:18,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 208 transitions, 2595 flow [2024-06-27 20:07:18,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:18,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 20:07:18,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-27 20:07:18,536 INFO L175 Difference]: Start difference. First operand has 165 places, 190 transitions, 2035 flow. Second operand 7 states and 115 transitions. [2024-06-27 20:07:18,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 208 transitions, 2595 flow [2024-06-27 20:07:18,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 208 transitions, 2507 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:18,680 INFO L231 Difference]: Finished difference. Result has 165 places, 193 transitions, 2046 flow [2024-06-27 20:07:18,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1947, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2046, PETRI_PLACES=165, PETRI_TRANSITIONS=193} [2024-06-27 20:07:18,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-27 20:07:18,681 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 193 transitions, 2046 flow [2024-06-27 20:07:18,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:18,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:18,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:18,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:07:18,682 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:18,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:18,682 INFO L85 PathProgramCache]: Analyzing trace with hash -40207712, now seen corresponding path program 3 times [2024-06-27 20:07:18,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:18,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313345570] [2024-06-27 20:07:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:18,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:19,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:19,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313345570] [2024-06-27 20:07:19,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313345570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:19,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:19,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:19,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553785926] [2024-06-27 20:07:19,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:19,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:19,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:19,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:19,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:19,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:19,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 193 transitions, 2046 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:19,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:19,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:19,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:19,992 INFO L124 PetriNetUnfolderBase]: 2664/4034 cut-off events. [2024-06-27 20:07:19,992 INFO L125 PetriNetUnfolderBase]: For 201787/201790 co-relation queries the response was YES. [2024-06-27 20:07:20,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28503 conditions, 4034 events. 2664/4034 cut-off events. For 201787/201790 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 20166 event pairs, 770 based on Foata normal form. 5/4037 useless extension candidates. Maximal degree in co-relation 28426. Up to 3963 conditions per place. [2024-06-27 20:07:20,030 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 178 selfloop transitions, 28 changer transitions 0/209 dead transitions. [2024-06-27 20:07:20,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 209 transitions, 2500 flow [2024-06-27 20:07:20,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:20,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:20,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:07:20,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-27 20:07:20,031 INFO L175 Difference]: Start difference. First operand has 165 places, 193 transitions, 2046 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:07:20,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 209 transitions, 2500 flow [2024-06-27 20:07:20,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 209 transitions, 2417 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 20:07:20,210 INFO L231 Difference]: Finished difference. Result has 168 places, 193 transitions, 2025 flow [2024-06-27 20:07:20,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2025, PETRI_PLACES=168, PETRI_TRANSITIONS=193} [2024-06-27 20:07:20,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-27 20:07:20,210 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 193 transitions, 2025 flow [2024-06-27 20:07:20,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:20,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:20,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:20,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:07:20,211 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:20,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:20,211 INFO L85 PathProgramCache]: Analyzing trace with hash 641055421, now seen corresponding path program 1 times [2024-06-27 20:07:20,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:20,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213405886] [2024-06-27 20:07:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:20,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:20,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:20,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:20,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:20,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213405886] [2024-06-27 20:07:20,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213405886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:20,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:20,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:20,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858344343] [2024-06-27 20:07:20,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:20,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:20,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:20,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:20,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:21,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:21,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 193 transitions, 2025 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:21,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:21,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:21,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:21,676 INFO L124 PetriNetUnfolderBase]: 2682/4059 cut-off events. [2024-06-27 20:07:21,676 INFO L125 PetriNetUnfolderBase]: For 210396/210399 co-relation queries the response was YES. [2024-06-27 20:07:21,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28810 conditions, 4059 events. 2682/4059 cut-off events. For 210396/210399 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 20323 event pairs, 765 based on Foata normal form. 4/4061 useless extension candidates. Maximal degree in co-relation 28732. Up to 3855 conditions per place. [2024-06-27 20:07:21,712 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 174 selfloop transitions, 58 changer transitions 0/235 dead transitions. [2024-06-27 20:07:21,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 235 transitions, 2855 flow [2024-06-27 20:07:21,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:07:21,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:07:21,714 INFO L175 Difference]: Start difference. First operand has 168 places, 193 transitions, 2025 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:07:21,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 235 transitions, 2855 flow [2024-06-27 20:07:21,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 235 transitions, 2774 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:21,899 INFO L231 Difference]: Finished difference. Result has 171 places, 203 transitions, 2212 flow [2024-06-27 20:07:21,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1944, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2212, PETRI_PLACES=171, PETRI_TRANSITIONS=203} [2024-06-27 20:07:21,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-27 20:07:21,900 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 203 transitions, 2212 flow [2024-06-27 20:07:21,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:21,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:21,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:21,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:07:21,901 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:21,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:21,901 INFO L85 PathProgramCache]: Analyzing trace with hash 641324532, now seen corresponding path program 1 times [2024-06-27 20:07:21,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:21,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670040729] [2024-06-27 20:07:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:21,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:22,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:22,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670040729] [2024-06-27 20:07:22,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670040729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:22,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:22,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:22,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405642655] [2024-06-27 20:07:22,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:22,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:22,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:22,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:22,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:22,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:22,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 203 transitions, 2212 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:22,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:22,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:22,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:23,265 INFO L124 PetriNetUnfolderBase]: 2784/4200 cut-off events. [2024-06-27 20:07:23,265 INFO L125 PetriNetUnfolderBase]: For 233559/233562 co-relation queries the response was YES. [2024-06-27 20:07:23,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30878 conditions, 4200 events. 2784/4200 cut-off events. For 233559/233562 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21110 event pairs, 779 based on Foata normal form. 8/4206 useless extension candidates. Maximal degree in co-relation 30798. Up to 3851 conditions per place. [2024-06-27 20:07:23,300 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 185 selfloop transitions, 65 changer transitions 0/253 dead transitions. [2024-06-27 20:07:23,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 253 transitions, 3154 flow [2024-06-27 20:07:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:07:23,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-27 20:07:23,301 INFO L175 Difference]: Start difference. First operand has 171 places, 203 transitions, 2212 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:07:23,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 253 transitions, 3154 flow [2024-06-27 20:07:23,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 253 transitions, 3023 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-27 20:07:23,485 INFO L231 Difference]: Finished difference. Result has 176 places, 222 transitions, 2493 flow [2024-06-27 20:07:23,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2493, PETRI_PLACES=176, PETRI_TRANSITIONS=222} [2024-06-27 20:07:23,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-27 20:07:23,486 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 222 transitions, 2493 flow [2024-06-27 20:07:23,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:23,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:23,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:23,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:07:23,487 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:23,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:23,487 INFO L85 PathProgramCache]: Analyzing trace with hash 644868669, now seen corresponding path program 1 times [2024-06-27 20:07:23,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:23,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872656127] [2024-06-27 20:07:23,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:23,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:24,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:24,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872656127] [2024-06-27 20:07:24,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872656127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:24,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:24,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:24,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078504299] [2024-06-27 20:07:24,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:24,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:24,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:24,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:24,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:24,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:24,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 222 transitions, 2493 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:24,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:24,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:24,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:24,691 INFO L124 PetriNetUnfolderBase]: 2810/4236 cut-off events. [2024-06-27 20:07:24,691 INFO L125 PetriNetUnfolderBase]: For 245498/245501 co-relation queries the response was YES. [2024-06-27 20:07:24,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32454 conditions, 4236 events. 2810/4236 cut-off events. For 245498/245501 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 21324 event pairs, 779 based on Foata normal form. 4/4238 useless extension candidates. Maximal degree in co-relation 32370. Up to 4066 conditions per place. [2024-06-27 20:07:24,730 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 196 selfloop transitions, 54 changer transitions 0/253 dead transitions. [2024-06-27 20:07:24,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 253 transitions, 3370 flow [2024-06-27 20:07:24,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:24,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:24,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:07:24,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:07:24,735 INFO L175 Difference]: Start difference. First operand has 176 places, 222 transitions, 2493 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:07:24,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 253 transitions, 3370 flow [2024-06-27 20:07:24,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 253 transitions, 3297 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-27 20:07:24,972 INFO L231 Difference]: Finished difference. Result has 182 places, 232 transitions, 2711 flow [2024-06-27 20:07:24,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2420, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2711, PETRI_PLACES=182, PETRI_TRANSITIONS=232} [2024-06-27 20:07:24,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-27 20:07:24,973 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 232 transitions, 2711 flow [2024-06-27 20:07:24,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:24,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:24,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:24,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:07:24,974 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:24,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:24,974 INFO L85 PathProgramCache]: Analyzing trace with hash 650582589, now seen corresponding path program 2 times [2024-06-27 20:07:24,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:24,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654773078] [2024-06-27 20:07:24,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:24,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:25,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:25,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654773078] [2024-06-27 20:07:25,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654773078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:25,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:25,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:25,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081621595] [2024-06-27 20:07:25,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:25,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:25,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:25,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:25,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:25,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:25,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 232 transitions, 2711 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:25,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:25,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:25,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:26,203 INFO L124 PetriNetUnfolderBase]: 2804/4228 cut-off events. [2024-06-27 20:07:26,204 INFO L125 PetriNetUnfolderBase]: For 252867/252870 co-relation queries the response was YES. [2024-06-27 20:07:26,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32556 conditions, 4228 events. 2804/4228 cut-off events. For 252867/252870 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 21264 event pairs, 779 based on Foata normal form. 4/4230 useless extension candidates. Maximal degree in co-relation 32468. Up to 4061 conditions per place. [2024-06-27 20:07:26,241 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 197 selfloop transitions, 50 changer transitions 0/250 dead transitions. [2024-06-27 20:07:26,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 250 transitions, 3425 flow [2024-06-27 20:07:26,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:26,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:26,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:07:26,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:07:26,243 INFO L175 Difference]: Start difference. First operand has 182 places, 232 transitions, 2711 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:07:26,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 250 transitions, 3425 flow [2024-06-27 20:07:26,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 250 transitions, 3347 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 20:07:26,484 INFO L231 Difference]: Finished difference. Result has 186 places, 232 transitions, 2742 flow [2024-06-27 20:07:26,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2633, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2742, PETRI_PLACES=186, PETRI_TRANSITIONS=232} [2024-06-27 20:07:26,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 144 predicate places. [2024-06-27 20:07:26,484 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 232 transitions, 2742 flow [2024-06-27 20:07:26,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:26,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:26,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:26,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:07:26,485 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:26,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:26,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1543552405, now seen corresponding path program 1 times [2024-06-27 20:07:26,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:26,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375895507] [2024-06-27 20:07:26,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:26,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:27,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:27,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375895507] [2024-06-27 20:07:27,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375895507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:27,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:27,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:07:27,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391246305] [2024-06-27 20:07:27,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:27,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:07:27,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:27,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:07:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:07:27,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:07:27,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 232 transitions, 2742 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:27,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:27,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:07:27,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:28,510 INFO L124 PetriNetUnfolderBase]: 2773/4228 cut-off events. [2024-06-27 20:07:28,510 INFO L125 PetriNetUnfolderBase]: For 273814/273817 co-relation queries the response was YES. [2024-06-27 20:07:28,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32930 conditions, 4228 events. 2773/4228 cut-off events. For 273814/273817 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21774 event pairs, 694 based on Foata normal form. 14/4229 useless extension candidates. Maximal degree in co-relation 32841. Up to 3679 conditions per place. [2024-06-27 20:07:28,549 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 41 changer transitions 0/270 dead transitions. [2024-06-27 20:07:28,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 270 transitions, 3366 flow [2024-06-27 20:07:28,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:07:28,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:07:28,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:07:28,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 20:07:28,550 INFO L175 Difference]: Start difference. First operand has 186 places, 232 transitions, 2742 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:07:28,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 270 transitions, 3366 flow [2024-06-27 20:07:28,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 270 transitions, 3279 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 20:07:28,727 INFO L231 Difference]: Finished difference. Result has 191 places, 233 transitions, 2773 flow [2024-06-27 20:07:28,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2773, PETRI_PLACES=191, PETRI_TRANSITIONS=233} [2024-06-27 20:07:28,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-27 20:07:28,728 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 233 transitions, 2773 flow [2024-06-27 20:07:28,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:28,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:28,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:28,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:07:28,728 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:28,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:28,728 INFO L85 PathProgramCache]: Analyzing trace with hash 650590122, now seen corresponding path program 2 times [2024-06-27 20:07:28,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:28,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93209304] [2024-06-27 20:07:28,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:28,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:29,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:29,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93209304] [2024-06-27 20:07:29,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93209304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:29,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:29,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:29,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603339736] [2024-06-27 20:07:29,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:29,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:29,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:29,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:29,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:29,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:29,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 233 transitions, 2773 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:29,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:29,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:29,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:30,116 INFO L124 PetriNetUnfolderBase]: 2977/4482 cut-off events. [2024-06-27 20:07:30,116 INFO L125 PetriNetUnfolderBase]: For 292260/292263 co-relation queries the response was YES. [2024-06-27 20:07:30,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35093 conditions, 4482 events. 2977/4482 cut-off events. For 292260/292263 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22817 event pairs, 820 based on Foata normal form. 8/4488 useless extension candidates. Maximal degree in co-relation 35003. Up to 4026 conditions per place. [2024-06-27 20:07:30,159 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 196 selfloop transitions, 72 changer transitions 0/271 dead transitions. [2024-06-27 20:07:30,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 271 transitions, 3813 flow [2024-06-27 20:07:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:30,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:07:30,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 20:07:30,160 INFO L175 Difference]: Start difference. First operand has 191 places, 233 transitions, 2773 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:07:30,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 271 transitions, 3813 flow [2024-06-27 20:07:30,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 271 transitions, 3711 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:30,380 INFO L231 Difference]: Finished difference. Result has 193 places, 244 transitions, 2979 flow [2024-06-27 20:07:30,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2979, PETRI_PLACES=193, PETRI_TRANSITIONS=244} [2024-06-27 20:07:30,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 151 predicate places. [2024-06-27 20:07:30,381 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 244 transitions, 2979 flow [2024-06-27 20:07:30,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:30,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:30,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:30,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:07:30,381 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:30,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:30,381 INFO L85 PathProgramCache]: Analyzing trace with hash 650578962, now seen corresponding path program 3 times [2024-06-27 20:07:30,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:30,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942804993] [2024-06-27 20:07:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:30,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:30,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:30,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:30,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942804993] [2024-06-27 20:07:30,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942804993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:30,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:30,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:30,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304606586] [2024-06-27 20:07:30,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:30,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:30,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:30,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:30,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:31,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:31,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 244 transitions, 2979 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:31,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:31,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:31,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:31,839 INFO L124 PetriNetUnfolderBase]: 2965/4467 cut-off events. [2024-06-27 20:07:31,839 INFO L125 PetriNetUnfolderBase]: For 297242/297245 co-relation queries the response was YES. [2024-06-27 20:07:31,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35145 conditions, 4467 events. 2965/4467 cut-off events. For 297242/297245 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22749 event pairs, 809 based on Foata normal form. 8/4473 useless extension candidates. Maximal degree in co-relation 35053. Up to 4022 conditions per place. [2024-06-27 20:07:31,875 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 196 selfloop transitions, 73 changer transitions 0/272 dead transitions. [2024-06-27 20:07:31,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 272 transitions, 3808 flow [2024-06-27 20:07:31,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:31,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:31,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:07:31,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 20:07:31,876 INFO L175 Difference]: Start difference. First operand has 193 places, 244 transitions, 2979 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:07:31,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 272 transitions, 3808 flow [2024-06-27 20:07:32,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 272 transitions, 3672 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 20:07:32,086 INFO L231 Difference]: Finished difference. Result has 197 places, 245 transitions, 3023 flow [2024-06-27 20:07:32,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2843, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3023, PETRI_PLACES=197, PETRI_TRANSITIONS=245} [2024-06-27 20:07:32,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-27 20:07:32,086 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 245 transitions, 3023 flow [2024-06-27 20:07:32,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:32,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:32,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:32,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:07:32,086 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:32,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:32,087 INFO L85 PathProgramCache]: Analyzing trace with hash 650578621, now seen corresponding path program 2 times [2024-06-27 20:07:32,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:32,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123362880] [2024-06-27 20:07:32,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:32,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:32,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:32,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123362880] [2024-06-27 20:07:32,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123362880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:32,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:32,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:32,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553876238] [2024-06-27 20:07:32,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:32,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:32,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:32,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:32,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:32,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:32,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 245 transitions, 3023 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:32,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:32,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:32,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:33,644 INFO L124 PetriNetUnfolderBase]: 2977/4484 cut-off events. [2024-06-27 20:07:33,644 INFO L125 PetriNetUnfolderBase]: For 304495/304498 co-relation queries the response was YES. [2024-06-27 20:07:33,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35363 conditions, 4484 events. 2977/4484 cut-off events. For 304495/304498 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 22914 event pairs, 815 based on Foata normal form. 4/4486 useless extension candidates. Maximal degree in co-relation 35270. Up to 4310 conditions per place. [2024-06-27 20:07:33,688 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 210 selfloop transitions, 55 changer transitions 0/268 dead transitions. [2024-06-27 20:07:33,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 268 transitions, 3833 flow [2024-06-27 20:07:33,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:33,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:33,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 20:07:33,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-27 20:07:33,689 INFO L175 Difference]: Start difference. First operand has 197 places, 245 transitions, 3023 flow. Second operand 8 states and 136 transitions. [2024-06-27 20:07:33,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 268 transitions, 3833 flow [2024-06-27 20:07:34,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 268 transitions, 3689 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:07:34,045 INFO L231 Difference]: Finished difference. Result has 200 places, 249 transitions, 3046 flow [2024-06-27 20:07:34,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2879, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3046, PETRI_PLACES=200, PETRI_TRANSITIONS=249} [2024-06-27 20:07:34,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-27 20:07:34,046 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 249 transitions, 3046 flow [2024-06-27 20:07:34,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:34,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:34,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:34,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:07:34,052 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:34,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:34,052 INFO L85 PathProgramCache]: Analyzing trace with hash 583926077, now seen corresponding path program 3 times [2024-06-27 20:07:34,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:34,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787047810] [2024-06-27 20:07:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:34,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:34,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:34,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:34,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787047810] [2024-06-27 20:07:34,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787047810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:34,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:34,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:34,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921018241] [2024-06-27 20:07:34,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:34,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:34,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:34,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:34,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:34,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:34,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 249 transitions, 3046 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:34,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:34,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:34,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:35,329 INFO L124 PetriNetUnfolderBase]: 2964/4464 cut-off events. [2024-06-27 20:07:35,330 INFO L125 PetriNetUnfolderBase]: For 312524/312524 co-relation queries the response was YES. [2024-06-27 20:07:35,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35202 conditions, 4464 events. 2964/4464 cut-off events. For 312524/312524 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22737 event pairs, 804 based on Foata normal form. 1/4464 useless extension candidates. Maximal degree in co-relation 35108. Up to 4416 conditions per place. [2024-06-27 20:07:35,372 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 239 selfloop transitions, 24 changer transitions 0/266 dead transitions. [2024-06-27 20:07:35,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 266 transitions, 3712 flow [2024-06-27 20:07:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-27 20:07:35,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-27 20:07:35,373 INFO L175 Difference]: Start difference. First operand has 200 places, 249 transitions, 3046 flow. Second operand 7 states and 117 transitions. [2024-06-27 20:07:35,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 266 transitions, 3712 flow [2024-06-27 20:07:35,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 266 transitions, 3565 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:07:35,696 INFO L231 Difference]: Finished difference. Result has 201 places, 249 transitions, 2953 flow [2024-06-27 20:07:35,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2899, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2953, PETRI_PLACES=201, PETRI_TRANSITIONS=249} [2024-06-27 20:07:35,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-27 20:07:35,697 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 249 transitions, 2953 flow [2024-06-27 20:07:35,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:35,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:35,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:35,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:07:35,697 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:35,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:35,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1428957623, now seen corresponding path program 4 times [2024-06-27 20:07:35,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:35,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263597751] [2024-06-27 20:07:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:35,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:35,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:36,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:36,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:36,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263597751] [2024-06-27 20:07:36,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263597751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:36,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:36,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:36,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639804048] [2024-06-27 20:07:36,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:36,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:36,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:36,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:36,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:36,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:36,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 249 transitions, 2953 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:36,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:36,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:36,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:37,040 INFO L124 PetriNetUnfolderBase]: 2969/4471 cut-off events. [2024-06-27 20:07:37,040 INFO L125 PetriNetUnfolderBase]: For 322404/322404 co-relation queries the response was YES. [2024-06-27 20:07:37,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35304 conditions, 4471 events. 2969/4471 cut-off events. For 322404/322404 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 22766 event pairs, 820 based on Foata normal form. 1/4471 useless extension candidates. Maximal degree in co-relation 35209. Up to 4438 conditions per place. [2024-06-27 20:07:37,086 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 243 selfloop transitions, 19 changer transitions 0/265 dead transitions. [2024-06-27 20:07:37,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 265 transitions, 3569 flow [2024-06-27 20:07:37,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:37,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:37,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 20:07:37,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:07:37,087 INFO L175 Difference]: Start difference. First operand has 201 places, 249 transitions, 2953 flow. Second operand 7 states and 112 transitions. [2024-06-27 20:07:37,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 265 transitions, 3569 flow [2024-06-27 20:07:37,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 265 transitions, 3377 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 20:07:37,431 INFO L231 Difference]: Finished difference. Result has 199 places, 252 transitions, 2871 flow [2024-06-27 20:07:37,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2775, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2871, PETRI_PLACES=199, PETRI_TRANSITIONS=252} [2024-06-27 20:07:37,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-27 20:07:37,431 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 252 transitions, 2871 flow [2024-06-27 20:07:37,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:37,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:37,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:37,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:07:37,432 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:37,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:37,432 INFO L85 PathProgramCache]: Analyzing trace with hash 496396967, now seen corresponding path program 2 times [2024-06-27 20:07:37,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:37,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782195463] [2024-06-27 20:07:37,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:37,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:37,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:38,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:38,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782195463] [2024-06-27 20:07:38,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782195463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:38,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:38,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:07:38,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651537467] [2024-06-27 20:07:38,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:38,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:07:38,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:38,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:07:38,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:07:38,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:07:38,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 252 transitions, 2871 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:38,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:38,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:07:38,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:39,294 INFO L124 PetriNetUnfolderBase]: 2876/4368 cut-off events. [2024-06-27 20:07:39,294 INFO L125 PetriNetUnfolderBase]: For 337093/337096 co-relation queries the response was YES. [2024-06-27 20:07:39,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34572 conditions, 4368 events. 2876/4368 cut-off events. For 337093/337096 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 22459 event pairs, 683 based on Foata normal form. 14/4369 useless extension candidates. Maximal degree in co-relation 34477. Up to 3687 conditions per place. [2024-06-27 20:07:39,336 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 215 selfloop transitions, 45 changer transitions 0/284 dead transitions. [2024-06-27 20:07:39,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 284 transitions, 3477 flow [2024-06-27 20:07:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:39,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:39,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:07:39,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-27 20:07:39,338 INFO L175 Difference]: Start difference. First operand has 199 places, 252 transitions, 2871 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:07:39,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 284 transitions, 3477 flow [2024-06-27 20:07:39,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 284 transitions, 3423 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 20:07:39,749 INFO L231 Difference]: Finished difference. Result has 202 places, 252 transitions, 2915 flow [2024-06-27 20:07:39,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2817, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2915, PETRI_PLACES=202, PETRI_TRANSITIONS=252} [2024-06-27 20:07:39,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-27 20:07:39,750 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 252 transitions, 2915 flow [2024-06-27 20:07:39,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:39,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:39,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:39,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:07:39,750 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:39,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:39,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1767147893, now seen corresponding path program 3 times [2024-06-27 20:07:39,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:39,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167246711] [2024-06-27 20:07:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:39,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:40,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:40,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167246711] [2024-06-27 20:07:40,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167246711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:40,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:40,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:07:40,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148104601] [2024-06-27 20:07:40,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:40,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:07:40,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:40,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:07:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:07:40,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:07:40,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 252 transitions, 2915 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:40,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:40,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:07:40,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:41,721 INFO L124 PetriNetUnfolderBase]: 2909/4431 cut-off events. [2024-06-27 20:07:41,721 INFO L125 PetriNetUnfolderBase]: For 348339/348342 co-relation queries the response was YES. [2024-06-27 20:07:41,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35209 conditions, 4431 events. 2909/4431 cut-off events. For 348339/348342 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 22979 event pairs, 752 based on Foata normal form. 12/4440 useless extension candidates. Maximal degree in co-relation 35113. Up to 4110 conditions per place. [2024-06-27 20:07:41,761 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 240 selfloop transitions, 18 changer transitions 0/282 dead transitions. [2024-06-27 20:07:41,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 282 transitions, 3533 flow [2024-06-27 20:07:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:41,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:41,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-27 20:07:41,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-27 20:07:41,762 INFO L175 Difference]: Start difference. First operand has 202 places, 252 transitions, 2915 flow. Second operand 8 states and 143 transitions. [2024-06-27 20:07:41,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 282 transitions, 3533 flow [2024-06-27 20:07:41,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 282 transitions, 3402 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:41,980 INFO L231 Difference]: Finished difference. Result has 203 places, 253 transitions, 2854 flow [2024-06-27 20:07:41,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2854, PETRI_PLACES=203, PETRI_TRANSITIONS=253} [2024-06-27 20:07:41,980 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-27 20:07:41,980 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 253 transitions, 2854 flow [2024-06-27 20:07:41,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:41,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:41,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:41,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:07:41,981 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:41,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:41,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1482048023, now seen corresponding path program 4 times [2024-06-27 20:07:41,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:41,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652978501] [2024-06-27 20:07:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:41,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:43,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:43,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:43,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652978501] [2024-06-27 20:07:43,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652978501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:43,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:43,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:07:43,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654462418] [2024-06-27 20:07:43,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:43,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:07:43,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:43,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:07:43,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:07:43,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:07:43,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 253 transitions, 2854 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:43,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:43,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:07:43,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:44,060 INFO L124 PetriNetUnfolderBase]: 2958/4510 cut-off events. [2024-06-27 20:07:44,060 INFO L125 PetriNetUnfolderBase]: For 350497/350500 co-relation queries the response was YES. [2024-06-27 20:07:44,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35359 conditions, 4510 events. 2958/4510 cut-off events. For 350497/350500 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23613 event pairs, 692 based on Foata normal form. 12/4509 useless extension candidates. Maximal degree in co-relation 35262. Up to 3674 conditions per place. [2024-06-27 20:07:44,103 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 203 selfloop transitions, 59 changer transitions 0/286 dead transitions. [2024-06-27 20:07:44,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 286 transitions, 3492 flow [2024-06-27 20:07:44,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:44,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:44,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:07:44,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-27 20:07:44,105 INFO L175 Difference]: Start difference. First operand has 203 places, 253 transitions, 2854 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:07:44,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 286 transitions, 3492 flow [2024-06-27 20:07:44,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 286 transitions, 3411 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:44,467 INFO L231 Difference]: Finished difference. Result has 204 places, 254 transitions, 2931 flow [2024-06-27 20:07:44,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2931, PETRI_PLACES=204, PETRI_TRANSITIONS=254} [2024-06-27 20:07:44,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-27 20:07:44,468 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 254 transitions, 2931 flow [2024-06-27 20:07:44,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:44,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:44,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:44,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:07:44,469 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:44,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:44,469 INFO L85 PathProgramCache]: Analyzing trace with hash -655530085, now seen corresponding path program 5 times [2024-06-27 20:07:44,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:44,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67300820] [2024-06-27 20:07:44,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:44,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:45,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:45,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67300820] [2024-06-27 20:07:45,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67300820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:45,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:45,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:07:45,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391895646] [2024-06-27 20:07:45,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:45,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:07:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:07:45,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:07:45,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:07:45,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 254 transitions, 2931 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:45,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:45,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:07:45,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:46,358 INFO L124 PetriNetUnfolderBase]: 3024/4632 cut-off events. [2024-06-27 20:07:46,358 INFO L125 PetriNetUnfolderBase]: For 336445/336448 co-relation queries the response was YES. [2024-06-27 20:07:46,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35432 conditions, 4632 events. 3024/4632 cut-off events. For 336445/336448 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 24492 event pairs, 658 based on Foata normal form. 16/4645 useless extension candidates. Maximal degree in co-relation 35335. Up to 3881 conditions per place. [2024-06-27 20:07:46,404 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 219 selfloop transitions, 55 changer transitions 0/298 dead transitions. [2024-06-27 20:07:46,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 298 transitions, 3665 flow [2024-06-27 20:07:46,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:46,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 20:07:46,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-27 20:07:46,405 INFO L175 Difference]: Start difference. First operand has 204 places, 254 transitions, 2931 flow. Second operand 8 states and 166 transitions. [2024-06-27 20:07:46,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 298 transitions, 3665 flow [2024-06-27 20:07:46,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 298 transitions, 3523 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:46,820 INFO L231 Difference]: Finished difference. Result has 205 places, 256 transitions, 2958 flow [2024-06-27 20:07:46,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2958, PETRI_PLACES=205, PETRI_TRANSITIONS=256} [2024-06-27 20:07:46,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-27 20:07:46,820 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 256 transitions, 2958 flow [2024-06-27 20:07:46,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:46,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:46,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:46,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:07:46,820 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:46,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash -655523575, now seen corresponding path program 6 times [2024-06-27 20:07:46,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:46,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540240810] [2024-06-27 20:07:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:46,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:47,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:47,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540240810] [2024-06-27 20:07:47,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540240810] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:47,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:47,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:07:47,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972257363] [2024-06-27 20:07:47,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:47,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:07:47,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:07:47,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:07:48,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-27 20:07:48,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 256 transitions, 2958 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:48,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:48,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-27 20:07:48,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:48,819 INFO L124 PetriNetUnfolderBase]: 3004/4600 cut-off events. [2024-06-27 20:07:48,819 INFO L125 PetriNetUnfolderBase]: For 323014/323017 co-relation queries the response was YES. [2024-06-27 20:07:48,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34749 conditions, 4600 events. 3004/4600 cut-off events. For 323014/323017 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 24353 event pairs, 735 based on Foata normal form. 12/4609 useless extension candidates. Maximal degree in co-relation 34652. Up to 3988 conditions per place. [2024-06-27 20:07:48,864 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 215 selfloop transitions, 51 changer transitions 0/290 dead transitions. [2024-06-27 20:07:48,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 290 transitions, 3536 flow [2024-06-27 20:07:48,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:48,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-27 20:07:48,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-27 20:07:48,865 INFO L175 Difference]: Start difference. First operand has 205 places, 256 transitions, 2958 flow. Second operand 8 states and 155 transitions. [2024-06-27 20:07:48,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 290 transitions, 3536 flow [2024-06-27 20:07:49,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 290 transitions, 3412 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 20:07:49,138 INFO L231 Difference]: Finished difference. Result has 206 places, 255 transitions, 2893 flow [2024-06-27 20:07:49,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2893, PETRI_PLACES=206, PETRI_TRANSITIONS=255} [2024-06-27 20:07:49,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-27 20:07:49,138 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 255 transitions, 2893 flow [2024-06-27 20:07:49,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:49,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:49,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:49,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:07:49,139 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:49,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:49,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1996296863, now seen corresponding path program 5 times [2024-06-27 20:07:49,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:49,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261418247] [2024-06-27 20:07:49,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:49,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:49,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:49,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261418247] [2024-06-27 20:07:49,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261418247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:49,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:49,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:49,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509740300] [2024-06-27 20:07:49,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:49,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:49,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:49,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:49,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:49,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:49,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 255 transitions, 2893 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:49,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:49,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:49,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:50,475 INFO L124 PetriNetUnfolderBase]: 3082/4676 cut-off events. [2024-06-27 20:07:50,475 INFO L125 PetriNetUnfolderBase]: For 321160/321163 co-relation queries the response was YES. [2024-06-27 20:07:50,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35037 conditions, 4676 events. 3082/4676 cut-off events. For 321160/321163 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 24478 event pairs, 843 based on Foata normal form. 3/4677 useless extension candidates. Maximal degree in co-relation 34939. Up to 4642 conditions per place. [2024-06-27 20:07:50,513 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 243 selfloop transitions, 19 changer transitions 0/265 dead transitions. [2024-06-27 20:07:50,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 265 transitions, 3441 flow [2024-06-27 20:07:50,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-27 20:07:50,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-27 20:07:50,514 INFO L175 Difference]: Start difference. First operand has 206 places, 255 transitions, 2893 flow. Second operand 7 states and 108 transitions. [2024-06-27 20:07:50,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 265 transitions, 3441 flow [2024-06-27 20:07:50,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 265 transitions, 3278 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 20:07:50,823 INFO L231 Difference]: Finished difference. Result has 206 places, 255 transitions, 2774 flow [2024-06-27 20:07:50,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2730, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2774, PETRI_PLACES=206, PETRI_TRANSITIONS=255} [2024-06-27 20:07:50,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-27 20:07:50,824 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 255 transitions, 2774 flow [2024-06-27 20:07:50,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:50,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:50,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:50,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:07:50,824 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:50,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:50,824 INFO L85 PathProgramCache]: Analyzing trace with hash 966069279, now seen corresponding path program 6 times [2024-06-27 20:07:50,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:50,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928817349] [2024-06-27 20:07:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:50,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:51,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:51,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928817349] [2024-06-27 20:07:51,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928817349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:51,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:51,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:07:51,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892944568] [2024-06-27 20:07:51,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:51,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:07:51,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:51,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:07:51,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:07:51,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:51,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 255 transitions, 2774 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:51,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:51,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:51,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:52,130 INFO L124 PetriNetUnfolderBase]: 3074/4665 cut-off events. [2024-06-27 20:07:52,130 INFO L125 PetriNetUnfolderBase]: For 329569/329572 co-relation queries the response was YES. [2024-06-27 20:07:52,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34563 conditions, 4665 events. 3074/4665 cut-off events. For 329569/329572 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 24393 event pairs, 836 based on Foata normal form. 4/4667 useless extension candidates. Maximal degree in co-relation 34465. Up to 4609 conditions per place. [2024-06-27 20:07:52,178 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 233 selfloop transitions, 29 changer transitions 0/265 dead transitions. [2024-06-27 20:07:52,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 265 transitions, 3322 flow [2024-06-27 20:07:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:07:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:07:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-27 20:07:52,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-27 20:07:52,179 INFO L175 Difference]: Start difference. First operand has 206 places, 255 transitions, 2774 flow. Second operand 7 states and 111 transitions. [2024-06-27 20:07:52,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 265 transitions, 3322 flow [2024-06-27 20:07:52,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 265 transitions, 3270 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:07:52,580 INFO L231 Difference]: Finished difference. Result has 208 places, 255 transitions, 2788 flow [2024-06-27 20:07:52,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2788, PETRI_PLACES=208, PETRI_TRANSITIONS=255} [2024-06-27 20:07:52,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-27 20:07:52,581 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 255 transitions, 2788 flow [2024-06-27 20:07:52,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:07:52,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:52,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:52,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:07:52,581 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:52,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:52,582 INFO L85 PathProgramCache]: Analyzing trace with hash 590754162, now seen corresponding path program 4 times [2024-06-27 20:07:52,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:52,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983929771] [2024-06-27 20:07:52,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:52,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:52,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:53,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:53,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:53,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983929771] [2024-06-27 20:07:53,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983929771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:53,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:53,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:53,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020550270] [2024-06-27 20:07:53,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:53,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:53,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:53,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:53,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:53,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:53,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 255 transitions, 2788 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:53,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:53,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:53,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:54,018 INFO L124 PetriNetUnfolderBase]: 3206/4848 cut-off events. [2024-06-27 20:07:54,018 INFO L125 PetriNetUnfolderBase]: For 365867/365870 co-relation queries the response was YES. [2024-06-27 20:07:54,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36548 conditions, 4848 events. 3206/4848 cut-off events. For 365867/365870 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25454 event pairs, 855 based on Foata normal form. 8/4854 useless extension candidates. Maximal degree in co-relation 36449. Up to 4566 conditions per place. [2024-06-27 20:07:54,067 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 231 selfloop transitions, 52 changer transitions 0/286 dead transitions. [2024-06-27 20:07:54,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 286 transitions, 3797 flow [2024-06-27 20:07:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:54,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:54,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:07:54,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-27 20:07:54,068 INFO L175 Difference]: Start difference. First operand has 208 places, 255 transitions, 2788 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:07:54,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 286 transitions, 3797 flow [2024-06-27 20:07:54,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 286 transitions, 3729 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 20:07:54,535 INFO L231 Difference]: Finished difference. Result has 211 places, 266 transitions, 2997 flow [2024-06-27 20:07:54,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2997, PETRI_PLACES=211, PETRI_TRANSITIONS=266} [2024-06-27 20:07:54,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-27 20:07:54,536 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 266 transitions, 2997 flow [2024-06-27 20:07:54,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:54,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:54,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:54,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:07:54,536 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:54,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:54,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1125222461, now seen corresponding path program 3 times [2024-06-27 20:07:54,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:54,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397080071] [2024-06-27 20:07:54,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:54,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:54,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:55,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:55,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397080071] [2024-06-27 20:07:55,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397080071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:55,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:55,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:55,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756726592] [2024-06-27 20:07:55,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:55,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:55,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:55,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:55,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:55,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:55,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 266 transitions, 2997 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:55,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:55,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:55,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:56,112 INFO L124 PetriNetUnfolderBase]: 3200/4840 cut-off events. [2024-06-27 20:07:56,112 INFO L125 PetriNetUnfolderBase]: For 369300/369303 co-relation queries the response was YES. [2024-06-27 20:07:56,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36957 conditions, 4840 events. 3200/4840 cut-off events. For 369300/369303 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25359 event pairs, 868 based on Foata normal form. 4/4842 useless extension candidates. Maximal degree in co-relation 36856. Up to 4778 conditions per place. [2024-06-27 20:07:56,160 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 240 selfloop transitions, 35 changer transitions 0/278 dead transitions. [2024-06-27 20:07:56,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 278 transitions, 3580 flow [2024-06-27 20:07:56,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:56,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:56,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 20:07:56,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 20:07:56,161 INFO L175 Difference]: Start difference. First operand has 211 places, 266 transitions, 2997 flow. Second operand 8 states and 124 transitions. [2024-06-27 20:07:56,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 278 transitions, 3580 flow [2024-06-27 20:07:56,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 278 transitions, 3397 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 20:07:56,440 INFO L231 Difference]: Finished difference. Result has 214 places, 267 transitions, 2900 flow [2024-06-27 20:07:56,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2814, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2900, PETRI_PLACES=214, PETRI_TRANSITIONS=267} [2024-06-27 20:07:56,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-27 20:07:56,441 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 267 transitions, 2900 flow [2024-06-27 20:07:56,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:56,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:56,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:56,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:07:56,441 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:56,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:56,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1252168686, now seen corresponding path program 5 times [2024-06-27 20:07:56,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:56,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924782137] [2024-06-27 20:07:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:56,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:57,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:57,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:57,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924782137] [2024-06-27 20:07:57,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924782137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:57,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:57,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:57,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122436102] [2024-06-27 20:07:57,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:57,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:57,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:57,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:57,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:57,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:57,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 267 transitions, 2900 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:57,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:57,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:57,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:57,949 INFO L124 PetriNetUnfolderBase]: 3182/4816 cut-off events. [2024-06-27 20:07:57,949 INFO L125 PetriNetUnfolderBase]: For 378723/378726 co-relation queries the response was YES. [2024-06-27 20:07:57,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36225 conditions, 4816 events. 3182/4816 cut-off events. For 378723/378726 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25282 event pairs, 833 based on Foata normal form. 8/4822 useless extension candidates. Maximal degree in co-relation 36124. Up to 4547 conditions per place. [2024-06-27 20:07:57,996 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 227 selfloop transitions, 57 changer transitions 0/287 dead transitions. [2024-06-27 20:07:57,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 287 transitions, 3775 flow [2024-06-27 20:07:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:07:57,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-27 20:07:57,997 INFO L175 Difference]: Start difference. First operand has 214 places, 267 transitions, 2900 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:07:57,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 287 transitions, 3775 flow [2024-06-27 20:07:58,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 287 transitions, 3698 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:07:58,452 INFO L231 Difference]: Finished difference. Result has 216 places, 268 transitions, 2973 flow [2024-06-27 20:07:58,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2823, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2973, PETRI_PLACES=216, PETRI_TRANSITIONS=268} [2024-06-27 20:07:58,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-27 20:07:58,452 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 268 transitions, 2973 flow [2024-06-27 20:07:58,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:58,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:07:58,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:07:58,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:07:58,452 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:07:58,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:07:58,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1124836170, now seen corresponding path program 6 times [2024-06-27 20:07:58,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:07:58,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76544792] [2024-06-27 20:07:58,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:07:58,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:07:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:07:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:07:58,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:07:58,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76544792] [2024-06-27 20:07:58,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76544792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:07:58,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:07:58,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:07:58,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879863829] [2024-06-27 20:07:58,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:07:58,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:07:58,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:07:58,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:07:58,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:07:59,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:07:59,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 268 transitions, 2973 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:07:59,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:07:59,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:07:59,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:07:59,901 INFO L124 PetriNetUnfolderBase]: 3170/4801 cut-off events. [2024-06-27 20:07:59,901 INFO L125 PetriNetUnfolderBase]: For 382311/382314 co-relation queries the response was YES. [2024-06-27 20:07:59,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36229 conditions, 4801 events. 3170/4801 cut-off events. For 382311/382314 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 25179 event pairs, 839 based on Foata normal form. 8/4807 useless extension candidates. Maximal degree in co-relation 36127. Up to 4676 conditions per place. [2024-06-27 20:07:59,943 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 247 selfloop transitions, 34 changer transitions 0/284 dead transitions. [2024-06-27 20:07:59,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 284 transitions, 3693 flow [2024-06-27 20:07:59,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:07:59,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:07:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:07:59,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 20:07:59,944 INFO L175 Difference]: Start difference. First operand has 216 places, 268 transitions, 2973 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:07:59,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 284 transitions, 3693 flow [2024-06-27 20:08:00,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 284 transitions, 3509 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:00,431 INFO L231 Difference]: Finished difference. Result has 218 places, 268 transitions, 2865 flow [2024-06-27 20:08:00,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2789, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2865, PETRI_PLACES=218, PETRI_TRANSITIONS=268} [2024-06-27 20:08:00,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-27 20:08:00,431 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 268 transitions, 2865 flow [2024-06-27 20:08:00,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:00,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:00,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:00,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:08:00,432 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:00,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:00,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1239257093, now seen corresponding path program 1 times [2024-06-27 20:08:00,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:00,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533841570] [2024-06-27 20:08:00,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:00,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:01,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:01,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533841570] [2024-06-27 20:08:01,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533841570] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:01,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:01,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:01,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051590340] [2024-06-27 20:08:01,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:01,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:01,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:01,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:01,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:01,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:01,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 268 transitions, 2865 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:01,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:01,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:01,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:02,087 INFO L124 PetriNetUnfolderBase]: 3172/4803 cut-off events. [2024-06-27 20:08:02,087 INFO L125 PetriNetUnfolderBase]: For 385284/385284 co-relation queries the response was YES. [2024-06-27 20:08:02,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36018 conditions, 4803 events. 3172/4803 cut-off events. For 385284/385284 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 25087 event pairs, 840 based on Foata normal form. 2/4804 useless extension candidates. Maximal degree in co-relation 35916. Up to 4776 conditions per place. [2024-06-27 20:08:02,134 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 17 changer transitions 0/286 dead transitions. [2024-06-27 20:08:02,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 286 transitions, 3534 flow [2024-06-27 20:08:02,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:02,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:02,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 20:08:02,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-27 20:08:02,135 INFO L175 Difference]: Start difference. First operand has 218 places, 268 transitions, 2865 flow. Second operand 8 states and 119 transitions. [2024-06-27 20:08:02,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 286 transitions, 3534 flow [2024-06-27 20:08:02,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 286 transitions, 3389 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 20:08:02,580 INFO L231 Difference]: Finished difference. Result has 219 places, 274 transitions, 2851 flow [2024-06-27 20:08:02,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2851, PETRI_PLACES=219, PETRI_TRANSITIONS=274} [2024-06-27 20:08:02,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-27 20:08:02,580 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 274 transitions, 2851 flow [2024-06-27 20:08:02,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:02,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:02,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:02,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:08:02,581 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:02,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:02,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1432668602, now seen corresponding path program 1 times [2024-06-27 20:08:02,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:02,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633260853] [2024-06-27 20:08:02,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:02,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:03,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:03,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633260853] [2024-06-27 20:08:03,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633260853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:03,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:03,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:03,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050585882] [2024-06-27 20:08:03,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:03,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:03,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:03,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:03,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:03,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:03,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 274 transitions, 2851 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:03,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:03,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:03,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:04,232 INFO L124 PetriNetUnfolderBase]: 3202/4845 cut-off events. [2024-06-27 20:08:04,232 INFO L125 PetriNetUnfolderBase]: For 404320/404320 co-relation queries the response was YES. [2024-06-27 20:08:04,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36581 conditions, 4845 events. 3202/4845 cut-off events. For 404320/404320 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25371 event pairs, 847 based on Foata normal form. 6/4850 useless extension candidates. Maximal degree in co-relation 36478. Up to 4774 conditions per place. [2024-06-27 20:08:04,270 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 276 selfloop transitions, 19 changer transitions 0/298 dead transitions. [2024-06-27 20:08:04,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 298 transitions, 3545 flow [2024-06-27 20:08:04,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:04,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:04,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:08:04,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 20:08:04,271 INFO L175 Difference]: Start difference. First operand has 219 places, 274 transitions, 2851 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:08:04,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 298 transitions, 3545 flow [2024-06-27 20:08:04,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 298 transitions, 3463 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 20:08:04,545 INFO L231 Difference]: Finished difference. Result has 222 places, 277 transitions, 2863 flow [2024-06-27 20:08:04,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2769, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2863, PETRI_PLACES=222, PETRI_TRANSITIONS=277} [2024-06-27 20:08:04,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-27 20:08:04,545 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 277 transitions, 2863 flow [2024-06-27 20:08:04,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:04,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:04,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:04,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:08:04,546 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:04,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1852420004, now seen corresponding path program 2 times [2024-06-27 20:08:04,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:04,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706390498] [2024-06-27 20:08:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:04,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:05,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:05,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706390498] [2024-06-27 20:08:05,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706390498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:05,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:05,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:05,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377538238] [2024-06-27 20:08:05,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:05,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:05,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:05,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:05,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:05,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:05,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 277 transitions, 2863 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:05,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:05,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:05,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:06,229 INFO L124 PetriNetUnfolderBase]: 3280/4953 cut-off events. [2024-06-27 20:08:06,229 INFO L125 PetriNetUnfolderBase]: For 429721/429721 co-relation queries the response was YES. [2024-06-27 20:08:06,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38163 conditions, 4953 events. 3280/4953 cut-off events. For 429721/429721 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25889 event pairs, 855 based on Foata normal form. 6/4958 useless extension candidates. Maximal degree in co-relation 38059. Up to 4709 conditions per place. [2024-06-27 20:08:06,279 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 54 changer transitions 0/313 dead transitions. [2024-06-27 20:08:06,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 313 transitions, 3964 flow [2024-06-27 20:08:06,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:06,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 20:08:06,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-27 20:08:06,280 INFO L175 Difference]: Start difference. First operand has 222 places, 277 transitions, 2863 flow. Second operand 8 states and 142 transitions. [2024-06-27 20:08:06,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 313 transitions, 3964 flow [2024-06-27 20:08:06,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 313 transitions, 3894 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:06,947 INFO L231 Difference]: Finished difference. Result has 224 places, 286 transitions, 3064 flow [2024-06-27 20:08:06,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3064, PETRI_PLACES=224, PETRI_TRANSITIONS=286} [2024-06-27 20:08:06,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-27 20:08:06,948 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 286 transitions, 3064 flow [2024-06-27 20:08:06,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:06,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:06,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:06,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:08:06,948 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:06,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1428949532, now seen corresponding path program 3 times [2024-06-27 20:08:06,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:06,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582112607] [2024-06-27 20:08:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:06,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:07,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:07,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582112607] [2024-06-27 20:08:07,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582112607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:07,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:07,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:07,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583155328] [2024-06-27 20:08:07,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:07,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:07,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:07,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:07,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:07,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:07,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 286 transitions, 3064 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:07,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:07,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:07,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:08,753 INFO L124 PetriNetUnfolderBase]: 3262/4929 cut-off events. [2024-06-27 20:08:08,753 INFO L125 PetriNetUnfolderBase]: For 433996/433996 co-relation queries the response was YES. [2024-06-27 20:08:08,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38193 conditions, 4929 events. 3262/4929 cut-off events. For 433996/433996 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25780 event pairs, 851 based on Foata normal form. 6/4934 useless extension candidates. Maximal degree in co-relation 38088. Up to 4698 conditions per place. [2024-06-27 20:08:08,802 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 53 changer transitions 0/314 dead transitions. [2024-06-27 20:08:08,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 314 transitions, 3907 flow [2024-06-27 20:08:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:08,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:08,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:08:08,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:08:08,803 INFO L175 Difference]: Start difference. First operand has 224 places, 286 transitions, 3064 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:08:08,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 314 transitions, 3907 flow [2024-06-27 20:08:09,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 314 transitions, 3808 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-27 20:08:09,377 INFO L231 Difference]: Finished difference. Result has 229 places, 286 transitions, 3077 flow [2024-06-27 20:08:09,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2965, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3077, PETRI_PLACES=229, PETRI_TRANSITIONS=286} [2024-06-27 20:08:09,377 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-27 20:08:09,377 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 286 transitions, 3077 flow [2024-06-27 20:08:09,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:09,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:09,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:09,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:08:09,378 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:09,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:09,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1311259462, now seen corresponding path program 4 times [2024-06-27 20:08:09,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:09,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123210260] [2024-06-27 20:08:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:09,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:09,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:09,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123210260] [2024-06-27 20:08:09,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123210260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:09,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:09,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:09,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495072117] [2024-06-27 20:08:09,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:09,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:09,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:09,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:09,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:10,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:10,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 286 transitions, 3077 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:10,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:10,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:10,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:11,065 INFO L124 PetriNetUnfolderBase]: 3292/4973 cut-off events. [2024-06-27 20:08:11,065 INFO L125 PetriNetUnfolderBase]: For 447508/447511 co-relation queries the response was YES. [2024-06-27 20:08:11,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38663 conditions, 4973 events. 3292/4973 cut-off events. For 447508/447511 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26050 event pairs, 859 based on Foata normal form. 6/4976 useless extension candidates. Maximal degree in co-relation 38556. Up to 4720 conditions per place. [2024-06-27 20:08:11,122 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 251 selfloop transitions, 58 changer transitions 0/312 dead transitions. [2024-06-27 20:08:11,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 312 transitions, 3960 flow [2024-06-27 20:08:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:11,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:11,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:08:11,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-27 20:08:11,123 INFO L175 Difference]: Start difference. First operand has 229 places, 286 transitions, 3077 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:08:11,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 312 transitions, 3960 flow [2024-06-27 20:08:11,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 312 transitions, 3826 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:11,616 INFO L231 Difference]: Finished difference. Result has 230 places, 289 transitions, 3125 flow [2024-06-27 20:08:11,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3125, PETRI_PLACES=230, PETRI_TRANSITIONS=289} [2024-06-27 20:08:11,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-27 20:08:11,616 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 289 transitions, 3125 flow [2024-06-27 20:08:11,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:11,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:11,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:11,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:08:11,617 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:11,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:11,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1246437468, now seen corresponding path program 5 times [2024-06-27 20:08:11,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:11,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128424082] [2024-06-27 20:08:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:11,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:11,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:12,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:12,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128424082] [2024-06-27 20:08:12,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128424082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:12,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:12,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:12,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535248723] [2024-06-27 20:08:12,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:12,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:12,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:12,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:12,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:12,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:12,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 289 transitions, 3125 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:12,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:12,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:12,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:13,387 INFO L124 PetriNetUnfolderBase]: 3322/5015 cut-off events. [2024-06-27 20:08:13,387 INFO L125 PetriNetUnfolderBase]: For 461722/461725 co-relation queries the response was YES. [2024-06-27 20:08:13,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39177 conditions, 5015 events. 3322/5015 cut-off events. For 461722/461725 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26291 event pairs, 865 based on Foata normal form. 6/5018 useless extension candidates. Maximal degree in co-relation 39069. Up to 4742 conditions per place. [2024-06-27 20:08:13,432 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 59 changer transitions 0/318 dead transitions. [2024-06-27 20:08:13,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 318 transitions, 4039 flow [2024-06-27 20:08:13,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:13,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 20:08:13,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-27 20:08:13,433 INFO L175 Difference]: Start difference. First operand has 230 places, 289 transitions, 3125 flow. Second operand 8 states and 140 transitions. [2024-06-27 20:08:13,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 318 transitions, 4039 flow [2024-06-27 20:08:13,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 318 transitions, 3841 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:13,839 INFO L231 Difference]: Finished difference. Result has 232 places, 292 transitions, 3112 flow [2024-06-27 20:08:13,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3112, PETRI_PLACES=232, PETRI_TRANSITIONS=292} [2024-06-27 20:08:13,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-27 20:08:13,840 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 292 transitions, 3112 flow [2024-06-27 20:08:13,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:13,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:13,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:13,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:08:13,840 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:13,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:13,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1239085818, now seen corresponding path program 6 times [2024-06-27 20:08:13,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:13,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161248323] [2024-06-27 20:08:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:13,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:14,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:14,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:14,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161248323] [2024-06-27 20:08:14,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161248323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:14,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:14,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:14,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2411471] [2024-06-27 20:08:14,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:14,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:14,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:14,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:14,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:14,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:14,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 292 transitions, 3112 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:14,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:14,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:14,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:15,549 INFO L124 PetriNetUnfolderBase]: 3304/4991 cut-off events. [2024-06-27 20:08:15,549 INFO L125 PetriNetUnfolderBase]: For 461218/461221 co-relation queries the response was YES. [2024-06-27 20:08:15,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38610 conditions, 4991 events. 3304/4991 cut-off events. For 461218/461221 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 26110 event pairs, 854 based on Foata normal form. 6/4994 useless extension candidates. Maximal degree in co-relation 38501. Up to 4731 conditions per place. [2024-06-27 20:08:15,601 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 247 selfloop transitions, 62 changer transitions 0/312 dead transitions. [2024-06-27 20:08:15,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 312 transitions, 3799 flow [2024-06-27 20:08:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:08:15,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 20:08:15,602 INFO L175 Difference]: Start difference. First operand has 232 places, 292 transitions, 3112 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:08:15,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 312 transitions, 3799 flow [2024-06-27 20:08:16,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 312 transitions, 3649 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:08:16,052 INFO L231 Difference]: Finished difference. Result has 235 places, 292 transitions, 3093 flow [2024-06-27 20:08:16,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2962, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3093, PETRI_PLACES=235, PETRI_TRANSITIONS=292} [2024-06-27 20:08:16,053 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 20:08:16,053 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 292 transitions, 3093 flow [2024-06-27 20:08:16,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:16,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:16,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:16,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:08:16,053 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:16,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:16,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1238808771, now seen corresponding path program 1 times [2024-06-27 20:08:16,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:16,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531621598] [2024-06-27 20:08:16,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:16,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:17,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:17,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531621598] [2024-06-27 20:08:17,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531621598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:17,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:17,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:17,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420609756] [2024-06-27 20:08:17,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:17,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:17,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:17,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:17,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:17,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:17,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 292 transitions, 3093 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:17,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:17,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:17,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:18,133 INFO L124 PetriNetUnfolderBase]: 3299/4982 cut-off events. [2024-06-27 20:08:18,134 INFO L125 PetriNetUnfolderBase]: For 462185/462185 co-relation queries the response was YES. [2024-06-27 20:08:18,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38449 conditions, 4982 events. 3299/4982 cut-off events. For 462185/462185 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 26081 event pairs, 859 based on Foata normal form. 2/4983 useless extension candidates. Maximal degree in co-relation 38339. Up to 4952 conditions per place. [2024-06-27 20:08:18,188 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 285 selfloop transitions, 18 changer transitions 0/306 dead transitions. [2024-06-27 20:08:18,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 306 transitions, 3779 flow [2024-06-27 20:08:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:18,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:18,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-27 20:08:18,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-27 20:08:18,189 INFO L175 Difference]: Start difference. First operand has 235 places, 292 transitions, 3093 flow. Second operand 8 states and 119 transitions. [2024-06-27 20:08:18,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 306 transitions, 3779 flow [2024-06-27 20:08:18,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 306 transitions, 3627 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 20:08:18,585 INFO L231 Difference]: Finished difference. Result has 235 places, 294 transitions, 3038 flow [2024-06-27 20:08:18,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2941, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3038, PETRI_PLACES=235, PETRI_TRANSITIONS=294} [2024-06-27 20:08:18,585 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-27 20:08:18,585 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 294 transitions, 3038 flow [2024-06-27 20:08:18,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:18,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:18,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:18,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:08:18,586 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:18,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:18,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1602355959, now seen corresponding path program 1 times [2024-06-27 20:08:18,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:18,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103518122] [2024-06-27 20:08:18,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:18,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:18,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:19,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:19,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103518122] [2024-06-27 20:08:19,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103518122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:19,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:19,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:19,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220471661] [2024-06-27 20:08:19,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:19,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:19,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:19,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:19,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:19,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:19,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 294 transitions, 3038 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:19,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:19,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:19,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:20,420 INFO L124 PetriNetUnfolderBase]: 3328/5026 cut-off events. [2024-06-27 20:08:20,421 INFO L125 PetriNetUnfolderBase]: For 484468/484471 co-relation queries the response was YES. [2024-06-27 20:08:20,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38980 conditions, 5026 events. 3328/5026 cut-off events. For 484468/484471 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26236 event pairs, 713 based on Foata normal form. 6/5030 useless extension candidates. Maximal degree in co-relation 38869. Up to 4727 conditions per place. [2024-06-27 20:08:20,475 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 252 selfloop transitions, 82 changer transitions 0/337 dead transitions. [2024-06-27 20:08:20,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 337 transitions, 4059 flow [2024-06-27 20:08:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:20,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:08:20,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:08:20,477 INFO L175 Difference]: Start difference. First operand has 235 places, 294 transitions, 3038 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:08:20,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 337 transitions, 4059 flow [2024-06-27 20:08:20,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 337 transitions, 3972 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:20,978 INFO L231 Difference]: Finished difference. Result has 239 places, 301 transitions, 3269 flow [2024-06-27 20:08:20,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2951, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3269, PETRI_PLACES=239, PETRI_TRANSITIONS=301} [2024-06-27 20:08:20,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-27 20:08:20,978 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 301 transitions, 3269 flow [2024-06-27 20:08:20,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:20,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:20,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:20,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:08:20,979 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:20,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:20,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1602116949, now seen corresponding path program 2 times [2024-06-27 20:08:20,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:20,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627452825] [2024-06-27 20:08:20,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:20,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:21,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:21,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:21,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627452825] [2024-06-27 20:08:21,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627452825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:21,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:21,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:21,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443495619] [2024-06-27 20:08:21,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:21,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:21,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:21,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:21,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:21,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:21,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 301 transitions, 3269 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:21,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:21,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:21,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:22,891 INFO L124 PetriNetUnfolderBase]: 3344/5050 cut-off events. [2024-06-27 20:08:22,891 INFO L125 PetriNetUnfolderBase]: For 501147/501150 co-relation queries the response was YES. [2024-06-27 20:08:22,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39936 conditions, 5050 events. 3344/5050 cut-off events. For 501147/501150 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26505 event pairs, 867 based on Foata normal form. 6/5054 useless extension candidates. Maximal degree in co-relation 39823. Up to 4829 conditions per place. [2024-06-27 20:08:22,946 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 254 selfloop transitions, 79 changer transitions 0/336 dead transitions. [2024-06-27 20:08:22,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 336 transitions, 4084 flow [2024-06-27 20:08:22,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:08:22,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:08:22,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-27 20:08:22,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-27 20:08:22,947 INFO L175 Difference]: Start difference. First operand has 239 places, 301 transitions, 3269 flow. Second operand 10 states and 172 transitions. [2024-06-27 20:08:22,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 336 transitions, 4084 flow [2024-06-27 20:08:23,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 336 transitions, 3861 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-27 20:08:23,521 INFO L231 Difference]: Finished difference. Result has 244 places, 304 transitions, 3285 flow [2024-06-27 20:08:23,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3078, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3285, PETRI_PLACES=244, PETRI_TRANSITIONS=304} [2024-06-27 20:08:23,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-27 20:08:23,522 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 304 transitions, 3285 flow [2024-06-27 20:08:23,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:23,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:23,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:23,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:08:23,522 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:23,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:23,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2007528131, now seen corresponding path program 1 times [2024-06-27 20:08:23,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:23,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626766409] [2024-06-27 20:08:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:23,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:24,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:24,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626766409] [2024-06-27 20:08:24,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626766409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:24,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:24,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:24,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362667209] [2024-06-27 20:08:24,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:24,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:24,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:24,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:24,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:24,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:24,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 304 transitions, 3285 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:24,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:24,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:24,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:25,517 INFO L124 PetriNetUnfolderBase]: 3414/5147 cut-off events. [2024-06-27 20:08:25,517 INFO L125 PetriNetUnfolderBase]: For 531351/531354 co-relation queries the response was YES. [2024-06-27 20:08:25,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40789 conditions, 5147 events. 3414/5147 cut-off events. For 531351/531354 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27040 event pairs, 838 based on Foata normal form. 8/5153 useless extension candidates. Maximal degree in co-relation 40674. Up to 4481 conditions per place. [2024-06-27 20:08:25,571 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 231 selfloop transitions, 122 changer transitions 0/356 dead transitions. [2024-06-27 20:08:25,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 356 transitions, 4531 flow [2024-06-27 20:08:25,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:08:25,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:08:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 201 transitions. [2024-06-27 20:08:25,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44567627494456763 [2024-06-27 20:08:25,572 INFO L175 Difference]: Start difference. First operand has 244 places, 304 transitions, 3285 flow. Second operand 11 states and 201 transitions. [2024-06-27 20:08:25,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 356 transitions, 4531 flow [2024-06-27 20:08:26,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 356 transitions, 4355 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 20:08:26,088 INFO L231 Difference]: Finished difference. Result has 248 places, 314 transitions, 3549 flow [2024-06-27 20:08:26,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3109, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3549, PETRI_PLACES=248, PETRI_TRANSITIONS=314} [2024-06-27 20:08:26,088 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-27 20:08:26,088 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 314 transitions, 3549 flow [2024-06-27 20:08:26,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:26,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:26,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:26,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:08:26,089 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:26,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:26,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1889437599, now seen corresponding path program 1 times [2024-06-27 20:08:26,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:26,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662170200] [2024-06-27 20:08:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:26,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:26,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:26,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:26,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662170200] [2024-06-27 20:08:26,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662170200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:26,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:26,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:26,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903913016] [2024-06-27 20:08:26,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:26,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:26,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:26,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:26,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:26,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:26,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 314 transitions, 3549 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:26,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:26,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:26,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:27,841 INFO L124 PetriNetUnfolderBase]: 3434/5176 cut-off events. [2024-06-27 20:08:27,842 INFO L125 PetriNetUnfolderBase]: For 544204/544207 co-relation queries the response was YES. [2024-06-27 20:08:27,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42474 conditions, 5176 events. 3434/5176 cut-off events. For 544204/544207 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 27201 event pairs, 824 based on Foata normal form. 6/5179 useless extension candidates. Maximal degree in co-relation 42357. Up to 4924 conditions per place. [2024-06-27 20:08:27,894 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 304 selfloop transitions, 37 changer transitions 0/344 dead transitions. [2024-06-27 20:08:27,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 344 transitions, 4371 flow [2024-06-27 20:08:27,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:27,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:08:27,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 20:08:27,895 INFO L175 Difference]: Start difference. First operand has 248 places, 314 transitions, 3549 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:08:27,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 344 transitions, 4371 flow [2024-06-27 20:08:28,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 344 transitions, 4134 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:28,481 INFO L231 Difference]: Finished difference. Result has 249 places, 318 transitions, 3471 flow [2024-06-27 20:08:28,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3312, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3471, PETRI_PLACES=249, PETRI_TRANSITIONS=318} [2024-06-27 20:08:28,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-27 20:08:28,482 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 318 transitions, 3471 flow [2024-06-27 20:08:28,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:28,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:28,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:28,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:08:28,483 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:28,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:28,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1483906137, now seen corresponding path program 2 times [2024-06-27 20:08:28,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:28,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794294131] [2024-06-27 20:08:28,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:28,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:29,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:29,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794294131] [2024-06-27 20:08:29,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794294131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:29,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:29,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:29,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575563846] [2024-06-27 20:08:29,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:29,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:29,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:29,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:29,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:29,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 318 transitions, 3471 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:29,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:29,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:29,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:30,017 INFO L124 PetriNetUnfolderBase]: 3502/5270 cut-off events. [2024-06-27 20:08:30,017 INFO L125 PetriNetUnfolderBase]: For 573444/573447 co-relation queries the response was YES. [2024-06-27 20:08:30,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44051 conditions, 5270 events. 3502/5270 cut-off events. For 573444/573447 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 27722 event pairs, 829 based on Foata normal form. 6/5273 useless extension candidates. Maximal degree in co-relation 43932. Up to 4837 conditions per place. [2024-06-27 20:08:30,078 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 284 selfloop transitions, 76 changer transitions 0/363 dead transitions. [2024-06-27 20:08:30,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 363 transitions, 4824 flow [2024-06-27 20:08:30,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:30,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:30,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:08:30,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-27 20:08:30,079 INFO L175 Difference]: Start difference. First operand has 249 places, 318 transitions, 3471 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:08:30,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 363 transitions, 4824 flow [2024-06-27 20:08:30,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 363 transitions, 4672 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:30,820 INFO L231 Difference]: Finished difference. Result has 253 places, 336 transitions, 3801 flow [2024-06-27 20:08:30,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3319, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3801, PETRI_PLACES=253, PETRI_TRANSITIONS=336} [2024-06-27 20:08:30,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-27 20:08:30,821 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 336 transitions, 3801 flow [2024-06-27 20:08:30,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:30,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:30,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:30,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:08:30,821 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:30,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:30,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1889317443, now seen corresponding path program 1 times [2024-06-27 20:08:30,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:30,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959803122] [2024-06-27 20:08:30,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:30,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:30,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:31,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:31,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959803122] [2024-06-27 20:08:31,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959803122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:31,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:31,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:31,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424520055] [2024-06-27 20:08:31,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:31,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:31,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:31,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:31,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:31,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:31,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 336 transitions, 3801 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:31,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:31,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:31,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:32,390 INFO L124 PetriNetUnfolderBase]: 3604/5410 cut-off events. [2024-06-27 20:08:32,390 INFO L125 PetriNetUnfolderBase]: For 622834/622837 co-relation queries the response was YES. [2024-06-27 20:08:32,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46587 conditions, 5410 events. 3604/5410 cut-off events. For 622834/622837 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 28515 event pairs, 855 based on Foata normal form. 8/5416 useless extension candidates. Maximal degree in co-relation 46465. Up to 4828 conditions per place. [2024-06-27 20:08:32,455 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 270 selfloop transitions, 104 changer transitions 0/377 dead transitions. [2024-06-27 20:08:32,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 377 transitions, 5093 flow [2024-06-27 20:08:32,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:32,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:08:32,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:08:32,456 INFO L175 Difference]: Start difference. First operand has 253 places, 336 transitions, 3801 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:08:32,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 377 transitions, 5093 flow [2024-06-27 20:08:33,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 377 transitions, 4945 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-27 20:08:33,150 INFO L231 Difference]: Finished difference. Result has 259 places, 349 transitions, 4082 flow [2024-06-27 20:08:33,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3653, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4082, PETRI_PLACES=259, PETRI_TRANSITIONS=349} [2024-06-27 20:08:33,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-27 20:08:33,151 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 349 transitions, 4082 flow [2024-06-27 20:08:33,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:33,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:33,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:33,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:08:33,151 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:33,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:33,151 INFO L85 PathProgramCache]: Analyzing trace with hash 713945943, now seen corresponding path program 3 times [2024-06-27 20:08:33,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:33,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713269591] [2024-06-27 20:08:33,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:33,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:33,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:33,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713269591] [2024-06-27 20:08:33,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713269591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:33,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:33,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:33,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033818674] [2024-06-27 20:08:33,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:33,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:33,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:33,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:33,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:33,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:33,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 349 transitions, 4082 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:33,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:33,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:33,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:34,816 INFO L124 PetriNetUnfolderBase]: 3656/5483 cut-off events. [2024-06-27 20:08:34,817 INFO L125 PetriNetUnfolderBase]: For 644346/644349 co-relation queries the response was YES. [2024-06-27 20:08:34,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48008 conditions, 5483 events. 3656/5483 cut-off events. For 644346/644349 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 28874 event pairs, 852 based on Foata normal form. 6/5486 useless extension candidates. Maximal degree in co-relation 47883. Up to 5018 conditions per place. [2024-06-27 20:08:34,888 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 298 selfloop transitions, 79 changer transitions 0/380 dead transitions. [2024-06-27 20:08:34,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 380 transitions, 5368 flow [2024-06-27 20:08:34,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:34,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:34,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 20:08:34,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-27 20:08:34,889 INFO L175 Difference]: Start difference. First operand has 259 places, 349 transitions, 4082 flow. Second operand 8 states and 141 transitions. [2024-06-27 20:08:34,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 380 transitions, 5368 flow [2024-06-27 20:08:35,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 380 transitions, 5245 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 20:08:35,793 INFO L231 Difference]: Finished difference. Result has 263 places, 356 transitions, 4250 flow [2024-06-27 20:08:35,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3959, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4250, PETRI_PLACES=263, PETRI_TRANSITIONS=356} [2024-06-27 20:08:35,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-27 20:08:35,793 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 356 transitions, 4250 flow [2024-06-27 20:08:35,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:35,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:35,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:35,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:08:35,794 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:35,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:35,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1306537281, now seen corresponding path program 2 times [2024-06-27 20:08:35,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:35,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14765767] [2024-06-27 20:08:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:35,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:36,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:36,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:36,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14765767] [2024-06-27 20:08:36,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14765767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:36,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:36,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:36,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804641575] [2024-06-27 20:08:36,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:36,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:36,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:36,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:36,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:36,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:36,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 356 transitions, 4250 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:36,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:36,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:36,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:37,482 INFO L124 PetriNetUnfolderBase]: 3686/5524 cut-off events. [2024-06-27 20:08:37,482 INFO L125 PetriNetUnfolderBase]: For 667747/667750 co-relation queries the response was YES. [2024-06-27 20:08:37,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48355 conditions, 5524 events. 3686/5524 cut-off events. For 667747/667750 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29137 event pairs, 882 based on Foata normal form. 8/5530 useless extension candidates. Maximal degree in co-relation 48229. Up to 4922 conditions per place. [2024-06-27 20:08:37,548 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 286 selfloop transitions, 96 changer transitions 0/385 dead transitions. [2024-06-27 20:08:37,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 385 transitions, 5443 flow [2024-06-27 20:08:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:37,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:08:37,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:08:37,549 INFO L175 Difference]: Start difference. First operand has 263 places, 356 transitions, 4250 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:08:37,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 385 transitions, 5443 flow [2024-06-27 20:08:38,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 385 transitions, 5300 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 20:08:38,353 INFO L231 Difference]: Finished difference. Result has 267 places, 360 transitions, 4366 flow [2024-06-27 20:08:38,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4107, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4366, PETRI_PLACES=267, PETRI_TRANSITIONS=360} [2024-06-27 20:08:38,354 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-27 20:08:38,354 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 360 transitions, 4366 flow [2024-06-27 20:08:38,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:38,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:38,354 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:38,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:08:38,354 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:38,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:38,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1306774431, now seen corresponding path program 3 times [2024-06-27 20:08:38,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:38,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567463433] [2024-06-27 20:08:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:38,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:38,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:38,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567463433] [2024-06-27 20:08:38,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567463433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:38,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:38,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:38,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229439840] [2024-06-27 20:08:38,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:38,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:38,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:38,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:38,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:39,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:39,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 360 transitions, 4366 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:39,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:39,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:39,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:40,070 INFO L124 PetriNetUnfolderBase]: 3668/5500 cut-off events. [2024-06-27 20:08:40,070 INFO L125 PetriNetUnfolderBase]: For 669559/669562 co-relation queries the response was YES. [2024-06-27 20:08:40,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48130 conditions, 5500 events. 3668/5500 cut-off events. For 669559/669562 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 29055 event pairs, 878 based on Foata normal form. 8/5506 useless extension candidates. Maximal degree in co-relation 48003. Up to 4911 conditions per place. [2024-06-27 20:08:40,131 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 288 selfloop transitions, 96 changer transitions 0/387 dead transitions. [2024-06-27 20:08:40,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 387 transitions, 5524 flow [2024-06-27 20:08:40,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:40,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 20:08:40,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-27 20:08:40,140 INFO L175 Difference]: Start difference. First operand has 267 places, 360 transitions, 4366 flow. Second operand 8 states and 147 transitions. [2024-06-27 20:08:40,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 387 transitions, 5524 flow [2024-06-27 20:08:41,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 387 transitions, 5355 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 20:08:41,013 INFO L231 Difference]: Finished difference. Result has 270 places, 360 transitions, 4396 flow [2024-06-27 20:08:41,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4197, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4396, PETRI_PLACES=270, PETRI_TRANSITIONS=360} [2024-06-27 20:08:41,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-27 20:08:41,014 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 360 transitions, 4396 flow [2024-06-27 20:08:41,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:41,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:41,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:41,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:08:41,014 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:41,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:41,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1306541249, now seen corresponding path program 2 times [2024-06-27 20:08:41,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:41,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835925917] [2024-06-27 20:08:41,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:41,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:41,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:41,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:41,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835925917] [2024-06-27 20:08:41,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835925917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:41,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:41,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:41,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075038943] [2024-06-27 20:08:41,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:41,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:41,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:41,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:41,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 360 transitions, 4396 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:41,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:41,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:41,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:42,924 INFO L124 PetriNetUnfolderBase]: 3704/5551 cut-off events. [2024-06-27 20:08:42,925 INFO L125 PetriNetUnfolderBase]: For 687794/687797 co-relation queries the response was YES. [2024-06-27 20:08:42,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48724 conditions, 5551 events. 3704/5551 cut-off events. For 687794/687797 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 29358 event pairs, 876 based on Foata normal form. 8/5557 useless extension candidates. Maximal degree in co-relation 48596. Up to 4936 conditions per place. [2024-06-27 20:08:42,990 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 287 selfloop transitions, 102 changer transitions 0/392 dead transitions. [2024-06-27 20:08:42,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 392 transitions, 5625 flow [2024-06-27 20:08:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:42,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 20:08:42,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-27 20:08:42,991 INFO L175 Difference]: Start difference. First operand has 270 places, 360 transitions, 4396 flow. Second operand 9 states and 159 transitions. [2024-06-27 20:08:42,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 392 transitions, 5625 flow [2024-06-27 20:08:43,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 392 transitions, 5458 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 20:08:43,902 INFO L231 Difference]: Finished difference. Result has 274 places, 365 transitions, 4514 flow [2024-06-27 20:08:43,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4229, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4514, PETRI_PLACES=274, PETRI_TRANSITIONS=365} [2024-06-27 20:08:43,902 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-27 20:08:43,903 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 365 transitions, 4514 flow [2024-06-27 20:08:43,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:43,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:43,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:43,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:08:43,903 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:43,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:43,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1712298701, now seen corresponding path program 3 times [2024-06-27 20:08:43,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:43,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410413019] [2024-06-27 20:08:43,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:43,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:44,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:44,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:44,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410413019] [2024-06-27 20:08:44,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410413019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:44,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:44,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:44,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787344076] [2024-06-27 20:08:44,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:44,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:44,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:44,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:44,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:44,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:44,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 365 transitions, 4514 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:44,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:44,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:44,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:45,941 INFO L124 PetriNetUnfolderBase]: 3734/5593 cut-off events. [2024-06-27 20:08:45,941 INFO L125 PetriNetUnfolderBase]: For 706218/706221 co-relation queries the response was YES. [2024-06-27 20:08:45,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49384 conditions, 5593 events. 3734/5593 cut-off events. For 706218/706221 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 29607 event pairs, 881 based on Foata normal form. 8/5599 useless extension candidates. Maximal degree in co-relation 49255. Up to 4982 conditions per place. [2024-06-27 20:08:46,002 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 293 selfloop transitions, 103 changer transitions 0/399 dead transitions. [2024-06-27 20:08:46,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 399 transitions, 5783 flow [2024-06-27 20:08:46,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:08:46,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:08:46,003 INFO L175 Difference]: Start difference. First operand has 274 places, 365 transitions, 4514 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:08:46,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 399 transitions, 5783 flow [2024-06-27 20:08:47,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 399 transitions, 5547 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:47,028 INFO L231 Difference]: Finished difference. Result has 276 places, 370 transitions, 4575 flow [2024-06-27 20:08:47,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4278, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4575, PETRI_PLACES=276, PETRI_TRANSITIONS=370} [2024-06-27 20:08:47,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-27 20:08:47,028 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 370 transitions, 4575 flow [2024-06-27 20:08:47,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:47,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:47,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:47,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:08:47,029 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:47,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:47,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1712309241, now seen corresponding path program 3 times [2024-06-27 20:08:47,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:47,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047075785] [2024-06-27 20:08:47,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:47,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:47,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:47,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:47,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047075785] [2024-06-27 20:08:47,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047075785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:47,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:47,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:47,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986654613] [2024-06-27 20:08:47,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:47,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:47,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:47,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:47,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:47,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:47,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 370 transitions, 4575 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:47,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:47,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:47,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:49,029 INFO L124 PetriNetUnfolderBase]: 3750/5617 cut-off events. [2024-06-27 20:08:49,029 INFO L125 PetriNetUnfolderBase]: For 718221/718224 co-relation queries the response was YES. [2024-06-27 20:08:49,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49702 conditions, 5617 events. 3750/5617 cut-off events. For 718221/718224 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29706 event pairs, 908 based on Foata normal form. 6/5621 useless extension candidates. Maximal degree in co-relation 49572. Up to 5436 conditions per place. [2024-06-27 20:08:49,088 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 329 selfloop transitions, 60 changer transitions 0/392 dead transitions. [2024-06-27 20:08:49,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 392 transitions, 5442 flow [2024-06-27 20:08:49,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:08:49,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:08:49,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-27 20:08:49,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-27 20:08:49,089 INFO L175 Difference]: Start difference. First operand has 276 places, 370 transitions, 4575 flow. Second operand 9 states and 146 transitions. [2024-06-27 20:08:49,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 392 transitions, 5442 flow [2024-06-27 20:08:50,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 392 transitions, 5232 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:50,126 INFO L231 Difference]: Finished difference. Result has 279 places, 373 transitions, 4540 flow [2024-06-27 20:08:50,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4540, PETRI_PLACES=279, PETRI_TRANSITIONS=373} [2024-06-27 20:08:50,127 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-27 20:08:50,127 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 373 transitions, 4540 flow [2024-06-27 20:08:50,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:50,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:50,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:50,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:08:50,128 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:50,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:50,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1712308931, now seen corresponding path program 4 times [2024-06-27 20:08:50,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:50,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345950268] [2024-06-27 20:08:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:50,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:50,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:50,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345950268] [2024-06-27 20:08:50,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345950268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:50,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:50,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:08:50,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021907640] [2024-06-27 20:08:50,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:50,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:08:50,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:50,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:08:50,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:08:50,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:50,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 373 transitions, 4540 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:50,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:50,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:50,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:52,259 INFO L124 PetriNetUnfolderBase]: 3760/5631 cut-off events. [2024-06-27 20:08:52,259 INFO L125 PetriNetUnfolderBase]: For 729181/729184 co-relation queries the response was YES. [2024-06-27 20:08:52,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49611 conditions, 5631 events. 3760/5631 cut-off events. For 729181/729184 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 29839 event pairs, 883 based on Foata normal form. 4/5633 useless extension candidates. Maximal degree in co-relation 49480. Up to 4982 conditions per place. [2024-06-27 20:08:52,322 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 289 selfloop transitions, 116 changer transitions 0/408 dead transitions. [2024-06-27 20:08:52,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 408 transitions, 5836 flow [2024-06-27 20:08:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:08:52,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:08:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 20:08:52,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-27 20:08:52,324 INFO L175 Difference]: Start difference. First operand has 279 places, 373 transitions, 4540 flow. Second operand 10 states and 178 transitions. [2024-06-27 20:08:52,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 408 transitions, 5836 flow [2024-06-27 20:08:53,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 408 transitions, 5692 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:08:53,387 INFO L231 Difference]: Finished difference. Result has 282 places, 377 transitions, 4717 flow [2024-06-27 20:08:53,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4396, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4717, PETRI_PLACES=282, PETRI_TRANSITIONS=377} [2024-06-27 20:08:53,387 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-27 20:08:53,387 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 377 transitions, 4717 flow [2024-06-27 20:08:53,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:08:53,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:53,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:53,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:08:53,388 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:53,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:53,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1314116415, now seen corresponding path program 4 times [2024-06-27 20:08:53,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:53,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489337251] [2024-06-27 20:08:53,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:53,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:54,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:54,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489337251] [2024-06-27 20:08:54,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489337251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:54,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:54,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:54,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58235577] [2024-06-27 20:08:54,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:54,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:54,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:54,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:54,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:54,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:54,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 377 transitions, 4717 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:54,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:54,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:54,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:55,335 INFO L124 PetriNetUnfolderBase]: 3770/5644 cut-off events. [2024-06-27 20:08:55,336 INFO L125 PetriNetUnfolderBase]: For 748960/748960 co-relation queries the response was YES. [2024-06-27 20:08:55,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50411 conditions, 5644 events. 3770/5644 cut-off events. For 748960/748960 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29864 event pairs, 890 based on Foata normal form. 2/5645 useless extension candidates. Maximal degree in co-relation 50279. Up to 5561 conditions per place. [2024-06-27 20:08:55,406 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 378 selfloop transitions, 22 changer transitions 0/403 dead transitions. [2024-06-27 20:08:55,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 403 transitions, 5645 flow [2024-06-27 20:08:55,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:55,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-27 20:08:55,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 20:08:55,407 INFO L175 Difference]: Start difference. First operand has 282 places, 377 transitions, 4717 flow. Second operand 8 states and 132 transitions. [2024-06-27 20:08:55,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 403 transitions, 5645 flow [2024-06-27 20:08:56,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 403 transitions, 5384 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 20:08:56,559 INFO L231 Difference]: Finished difference. Result has 282 places, 380 transitions, 4572 flow [2024-06-27 20:08:56,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4456, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4572, PETRI_PLACES=282, PETRI_TRANSITIONS=380} [2024-06-27 20:08:56,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-27 20:08:56,560 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 380 transitions, 4572 flow [2024-06-27 20:08:56,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:56,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:56,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:56,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:08:56,561 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:56,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:56,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1702274603, now seen corresponding path program 4 times [2024-06-27 20:08:56,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:56,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117896747] [2024-06-27 20:08:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:56,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:56,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:57,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:57,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:57,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117896747] [2024-06-27 20:08:57,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117896747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:57,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:57,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:57,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489757750] [2024-06-27 20:08:57,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:57,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:57,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:57,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:57,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:08:57,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:08:57,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 380 transitions, 4572 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:57,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:08:57,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:08:57,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:08:58,279 INFO L124 PetriNetUnfolderBase]: 3749/5614 cut-off events. [2024-06-27 20:08:58,279 INFO L125 PetriNetUnfolderBase]: For 758945/758945 co-relation queries the response was YES. [2024-06-27 20:08:58,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49806 conditions, 5614 events. 3749/5614 cut-off events. For 758945/758945 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 29702 event pairs, 879 based on Foata normal form. 3/5616 useless extension candidates. Maximal degree in co-relation 49673. Up to 5511 conditions per place. [2024-06-27 20:08:58,348 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 358 selfloop transitions, 41 changer transitions 0/402 dead transitions. [2024-06-27 20:08:58,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 402 transitions, 5598 flow [2024-06-27 20:08:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:08:58,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:08:58,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:08:58,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-27 20:08:58,350 INFO L175 Difference]: Start difference. First operand has 282 places, 380 transitions, 4572 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:08:58,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 402 transitions, 5598 flow [2024-06-27 20:08:59,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 402 transitions, 5498 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:08:59,375 INFO L231 Difference]: Finished difference. Result has 284 places, 380 transitions, 4560 flow [2024-06-27 20:08:59,375 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4560, PETRI_PLACES=284, PETRI_TRANSITIONS=380} [2024-06-27 20:08:59,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-27 20:08:59,376 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 380 transitions, 4560 flow [2024-06-27 20:08:59,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:08:59,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:08:59,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:08:59,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:08:59,376 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:08:59,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:08:59,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1702274789, now seen corresponding path program 5 times [2024-06-27 20:08:59,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:08:59,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642519471] [2024-06-27 20:08:59,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:08:59,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:08:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:08:59,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:08:59,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:08:59,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642519471] [2024-06-27 20:08:59,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642519471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:08:59,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:08:59,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:08:59,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848067252] [2024-06-27 20:08:59,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:08:59,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:08:59,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:08:59,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:08:59,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:00,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:00,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 380 transitions, 4560 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:00,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:00,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:00,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:01,102 INFO L124 PetriNetUnfolderBase]: 3759/5628 cut-off events. [2024-06-27 20:09:01,103 INFO L125 PetriNetUnfolderBase]: For 774300/774300 co-relation queries the response was YES. [2024-06-27 20:09:01,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50111 conditions, 5628 events. 3759/5628 cut-off events. For 774300/774300 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29784 event pairs, 880 based on Foata normal form. 2/5629 useless extension candidates. Maximal degree in co-relation 49977. Up to 5484 conditions per place. [2024-06-27 20:09:01,177 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 360 selfloop transitions, 48 changer transitions 0/411 dead transitions. [2024-06-27 20:09:01,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 411 transitions, 5962 flow [2024-06-27 20:09:01,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:01,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:01,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 20:09:01,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-27 20:09:01,178 INFO L175 Difference]: Start difference. First operand has 284 places, 380 transitions, 4560 flow. Second operand 8 states and 135 transitions. [2024-06-27 20:09:01,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 411 transitions, 5962 flow [2024-06-27 20:09:02,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 411 transitions, 5528 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-27 20:09:02,259 INFO L231 Difference]: Finished difference. Result has 280 places, 389 transitions, 4458 flow [2024-06-27 20:09:02,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4126, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4458, PETRI_PLACES=280, PETRI_TRANSITIONS=389} [2024-06-27 20:09:02,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-27 20:09:02,259 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 389 transitions, 4458 flow [2024-06-27 20:09:02,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:02,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:02,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:02,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:09:02,259 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:02,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:02,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1279804505, now seen corresponding path program 6 times [2024-06-27 20:09:02,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:02,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046319081] [2024-06-27 20:09:02,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:02,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:02,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:02,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:02,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:02,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046319081] [2024-06-27 20:09:02,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046319081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:02,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:02,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:02,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114080126] [2024-06-27 20:09:02,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:02,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:02,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:02,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:02,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:02,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:02,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 389 transitions, 4458 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:02,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:02,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:02,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:04,038 INFO L124 PetriNetUnfolderBase]: 3769/5642 cut-off events. [2024-06-27 20:09:04,038 INFO L125 PetriNetUnfolderBase]: For 789688/789688 co-relation queries the response was YES. [2024-06-27 20:09:04,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50189 conditions, 5642 events. 3769/5642 cut-off events. For 789688/789688 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29885 event pairs, 882 based on Foata normal form. 2/5643 useless extension candidates. Maximal degree in co-relation 50055. Up to 5574 conditions per place. [2024-06-27 20:09:04,110 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 391 selfloop transitions, 23 changer transitions 0/417 dead transitions. [2024-06-27 20:09:04,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 417 transitions, 5600 flow [2024-06-27 20:09:04,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:04,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:04,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:09:04,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-27 20:09:04,111 INFO L175 Difference]: Start difference. First operand has 280 places, 389 transitions, 4458 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:09:04,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 417 transitions, 5600 flow [2024-06-27 20:09:05,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 417 transitions, 5463 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-27 20:09:05,191 INFO L231 Difference]: Finished difference. Result has 288 places, 393 transitions, 4477 flow [2024-06-27 20:09:05,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4330, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4477, PETRI_PLACES=288, PETRI_TRANSITIONS=393} [2024-06-27 20:09:05,192 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-27 20:09:05,192 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 393 transitions, 4477 flow [2024-06-27 20:09:05,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:05,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:05,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:05,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:09:05,192 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:05,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:05,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1474969059, now seen corresponding path program 7 times [2024-06-27 20:09:05,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:05,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509481364] [2024-06-27 20:09:05,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:05,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:05,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:05,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509481364] [2024-06-27 20:09:05,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509481364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:05,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:05,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:05,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503924121] [2024-06-27 20:09:05,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:05,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:05,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:05,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:05,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:05,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:05,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 393 transitions, 4477 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:05,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:05,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:05,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:07,050 INFO L124 PetriNetUnfolderBase]: 3763/5634 cut-off events. [2024-06-27 20:09:07,050 INFO L125 PetriNetUnfolderBase]: For 799692/799692 co-relation queries the response was YES. [2024-06-27 20:09:07,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50108 conditions, 5634 events. 3763/5634 cut-off events. For 799692/799692 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29782 event pairs, 889 based on Foata normal form. 2/5635 useless extension candidates. Maximal degree in co-relation 49971. Up to 5595 conditions per place. [2024-06-27 20:09:07,111 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 391 selfloop transitions, 17 changer transitions 0/411 dead transitions. [2024-06-27 20:09:07,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 411 transitions, 5341 flow [2024-06-27 20:09:07,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:07,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:09:07,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-27 20:09:07,112 INFO L175 Difference]: Start difference. First operand has 288 places, 393 transitions, 4477 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:09:07,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 411 transitions, 5341 flow [2024-06-27 20:09:08,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 411 transitions, 5241 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 20:09:08,021 INFO L231 Difference]: Finished difference. Result has 290 places, 393 transitions, 4417 flow [2024-06-27 20:09:08,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4377, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4417, PETRI_PLACES=290, PETRI_TRANSITIONS=393} [2024-06-27 20:09:08,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-27 20:09:08,021 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 393 transitions, 4417 flow [2024-06-27 20:09:08,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:08,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:08,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:08,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:09:08,021 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:08,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:08,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1347774599, now seen corresponding path program 8 times [2024-06-27 20:09:08,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:08,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606324099] [2024-06-27 20:09:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:08,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:08,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:08,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606324099] [2024-06-27 20:09:08,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606324099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:08,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:08,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:08,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280320927] [2024-06-27 20:09:08,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:08,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:08,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:08,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:08,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:08,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:08,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 393 transitions, 4417 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:08,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:08,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:08,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:09,761 INFO L124 PetriNetUnfolderBase]: 3773/5648 cut-off events. [2024-06-27 20:09:09,761 INFO L125 PetriNetUnfolderBase]: For 818815/818815 co-relation queries the response was YES. [2024-06-27 20:09:09,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50360 conditions, 5648 events. 3773/5648 cut-off events. For 818815/818815 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29924 event pairs, 892 based on Foata normal form. 2/5649 useless extension candidates. Maximal degree in co-relation 50222. Up to 5594 conditions per place. [2024-06-27 20:09:09,830 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 29 changer transitions 0/412 dead transitions. [2024-06-27 20:09:09,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 412 transitions, 5358 flow [2024-06-27 20:09:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:09:09,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 20:09:09,831 INFO L175 Difference]: Start difference. First operand has 290 places, 393 transitions, 4417 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:09:09,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 412 transitions, 5358 flow [2024-06-27 20:09:10,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 412 transitions, 5312 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-27 20:09:10,982 INFO L231 Difference]: Finished difference. Result has 291 places, 397 transitions, 4524 flow [2024-06-27 20:09:10,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4371, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4524, PETRI_PLACES=291, PETRI_TRANSITIONS=397} [2024-06-27 20:09:10,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-27 20:09:10,983 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 397 transitions, 4524 flow [2024-06-27 20:09:10,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:10,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:10,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:10,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:09:10,983 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:10,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:10,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1347595853, now seen corresponding path program 5 times [2024-06-27 20:09:10,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:10,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827674565] [2024-06-27 20:09:10,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:10,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:11,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:11,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:11,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827674565] [2024-06-27 20:09:11,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827674565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:11,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:11,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:11,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997734921] [2024-06-27 20:09:11,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:11,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:11,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:11,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:11,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:11,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:11,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 397 transitions, 4524 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:11,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:11,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:11,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:12,698 INFO L124 PetriNetUnfolderBase]: 3788/5669 cut-off events. [2024-06-27 20:09:12,698 INFO L125 PetriNetUnfolderBase]: For 841446/841446 co-relation queries the response was YES. [2024-06-27 20:09:12,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50731 conditions, 5669 events. 3788/5669 cut-off events. For 841446/841446 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29997 event pairs, 886 based on Foata normal form. 3/5671 useless extension candidates. Maximal degree in co-relation 50592. Up to 5618 conditions per place. [2024-06-27 20:09:12,774 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 386 selfloop transitions, 28 changer transitions 0/417 dead transitions. [2024-06-27 20:09:12,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 417 transitions, 5441 flow [2024-06-27 20:09:12,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:12,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 20:09:12,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-27 20:09:12,775 INFO L175 Difference]: Start difference. First operand has 291 places, 397 transitions, 4524 flow. Second operand 8 states and 127 transitions. [2024-06-27 20:09:12,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 417 transitions, 5441 flow [2024-06-27 20:09:13,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 417 transitions, 5321 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:09:13,984 INFO L231 Difference]: Finished difference. Result has 293 places, 401 transitions, 4515 flow [2024-06-27 20:09:13,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4404, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4515, PETRI_PLACES=293, PETRI_TRANSITIONS=401} [2024-06-27 20:09:13,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-27 20:09:13,984 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 401 transitions, 4515 flow [2024-06-27 20:09:13,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:13,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:13,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:13,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:09:13,985 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:13,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:13,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1348011749, now seen corresponding path program 9 times [2024-06-27 20:09:13,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:13,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564149144] [2024-06-27 20:09:13,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:13,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:14,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:14,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:14,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564149144] [2024-06-27 20:09:14,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564149144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:14,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:14,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:14,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776882100] [2024-06-27 20:09:14,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:14,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:14,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:14,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:14,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:14,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:14,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 401 transitions, 4515 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:14,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:14,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:14,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:15,746 INFO L124 PetriNetUnfolderBase]: 3798/5683 cut-off events. [2024-06-27 20:09:15,746 INFO L125 PetriNetUnfolderBase]: For 857040/857040 co-relation queries the response was YES. [2024-06-27 20:09:15,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51046 conditions, 5683 events. 3798/5683 cut-off events. For 857040/857040 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 30128 event pairs, 887 based on Foata normal form. 2/5684 useless extension candidates. Maximal degree in co-relation 50907. Up to 5614 conditions per place. [2024-06-27 20:09:15,814 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 37 changer transitions 0/420 dead transitions. [2024-06-27 20:09:15,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 420 transitions, 5474 flow [2024-06-27 20:09:15,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:15,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:15,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:09:15,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:09:15,815 INFO L175 Difference]: Start difference. First operand has 293 places, 401 transitions, 4515 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:09:15,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 420 transitions, 5474 flow [2024-06-27 20:09:16,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 420 transitions, 5408 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 20:09:16,930 INFO L231 Difference]: Finished difference. Result has 296 places, 404 transitions, 4614 flow [2024-06-27 20:09:16,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4449, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4614, PETRI_PLACES=296, PETRI_TRANSITIONS=404} [2024-06-27 20:09:16,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-27 20:09:16,930 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 404 transitions, 4614 flow [2024-06-27 20:09:16,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:16,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:16,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:16,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:09:16,930 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:16,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:16,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1348011563, now seen corresponding path program 6 times [2024-06-27 20:09:16,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:16,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502219122] [2024-06-27 20:09:16,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:16,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:16,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:17,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:17,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:17,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502219122] [2024-06-27 20:09:17,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502219122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:17,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:17,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:17,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201733503] [2024-06-27 20:09:17,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:17,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:17,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:17,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:17,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:17,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:17,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 404 transitions, 4614 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:17,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:17,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:17,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:18,768 INFO L124 PetriNetUnfolderBase]: 3813/5704 cut-off events. [2024-06-27 20:09:18,768 INFO L125 PetriNetUnfolderBase]: For 880190/880190 co-relation queries the response was YES. [2024-06-27 20:09:18,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51404 conditions, 5704 events. 3813/5704 cut-off events. For 880190/880190 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 30220 event pairs, 882 based on Foata normal form. 3/5706 useless extension candidates. Maximal degree in co-relation 51264. Up to 5641 conditions per place. [2024-06-27 20:09:18,830 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 389 selfloop transitions, 33 changer transitions 0/425 dead transitions. [2024-06-27 20:09:18,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 425 transitions, 5552 flow [2024-06-27 20:09:18,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 20:09:18,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-27 20:09:18,831 INFO L175 Difference]: Start difference. First operand has 296 places, 404 transitions, 4614 flow. Second operand 8 states and 131 transitions. [2024-06-27 20:09:18,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 425 transitions, 5552 flow [2024-06-27 20:09:19,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 425 transitions, 5424 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 20:09:20,001 INFO L231 Difference]: Finished difference. Result has 298 places, 407 transitions, 4600 flow [2024-06-27 20:09:20,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4600, PETRI_PLACES=298, PETRI_TRANSITIONS=407} [2024-06-27 20:09:20,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-27 20:09:20,001 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 407 transitions, 4600 flow [2024-06-27 20:09:20,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:20,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:20,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:20,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:09:20,002 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:20,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:20,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1771983749, now seen corresponding path program 7 times [2024-06-27 20:09:20,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:20,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857570534] [2024-06-27 20:09:20,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:20,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:20,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:20,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857570534] [2024-06-27 20:09:20,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857570534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:20,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:20,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:20,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623916088] [2024-06-27 20:09:20,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:20,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:20,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:20,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:20,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:20,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:20,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 407 transitions, 4600 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:20,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:20,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:20,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:21,736 INFO L124 PetriNetUnfolderBase]: 3795/5681 cut-off events. [2024-06-27 20:09:21,736 INFO L125 PetriNetUnfolderBase]: For 887358/887361 co-relation queries the response was YES. [2024-06-27 20:09:21,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50916 conditions, 5681 events. 3795/5681 cut-off events. For 887358/887361 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 30102 event pairs, 880 based on Foata normal form. 8/5687 useless extension candidates. Maximal degree in co-relation 50775. Up to 5535 conditions per place. [2024-06-27 20:09:21,809 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 381 selfloop transitions, 39 changer transitions 0/423 dead transitions. [2024-06-27 20:09:21,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 423 transitions, 5668 flow [2024-06-27 20:09:21,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 20:09:21,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-27 20:09:21,810 INFO L175 Difference]: Start difference. First operand has 298 places, 407 transitions, 4600 flow. Second operand 8 states and 129 transitions. [2024-06-27 20:09:21,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 423 transitions, 5668 flow [2024-06-27 20:09:23,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 423 transitions, 5594 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:09:23,121 INFO L231 Difference]: Finished difference. Result has 300 places, 407 transitions, 4612 flow [2024-06-27 20:09:23,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4526, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4612, PETRI_PLACES=300, PETRI_TRANSITIONS=407} [2024-06-27 20:09:23,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-27 20:09:23,121 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 407 transitions, 4612 flow [2024-06-27 20:09:23,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:23,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:23,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:23,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:09:23,122 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:23,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1182135465, now seen corresponding path program 10 times [2024-06-27 20:09:23,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:23,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863229922] [2024-06-27 20:09:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:23,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:23,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:23,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:23,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863229922] [2024-06-27 20:09:23,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863229922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:23,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:23,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:23,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541287503] [2024-06-27 20:09:23,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:23,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:23,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:23,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:23,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:23,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:23,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 407 transitions, 4612 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:23,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:23,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:23,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:24,861 INFO L124 PetriNetUnfolderBase]: 3805/5696 cut-off events. [2024-06-27 20:09:24,861 INFO L125 PetriNetUnfolderBase]: For 891950/891953 co-relation queries the response was YES. [2024-06-27 20:09:24,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51355 conditions, 5696 events. 3805/5696 cut-off events. For 891950/891953 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30203 event pairs, 892 based on Foata normal form. 4/5697 useless extension candidates. Maximal degree in co-relation 51213. Up to 5640 conditions per place. [2024-06-27 20:09:24,940 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 390 selfloop transitions, 29 changer transitions 0/422 dead transitions. [2024-06-27 20:09:24,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 422 transitions, 5567 flow [2024-06-27 20:09:24,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:24,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:24,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 20:09:24,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:09:24,944 INFO L175 Difference]: Start difference. First operand has 300 places, 407 transitions, 4612 flow. Second operand 8 states and 123 transitions. [2024-06-27 20:09:24,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 422 transitions, 5567 flow [2024-06-27 20:09:26,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 422 transitions, 5496 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 20:09:26,208 INFO L231 Difference]: Finished difference. Result has 303 places, 410 transitions, 4696 flow [2024-06-27 20:09:26,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4541, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4696, PETRI_PLACES=303, PETRI_TRANSITIONS=410} [2024-06-27 20:09:26,208 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 261 predicate places. [2024-06-27 20:09:26,208 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 410 transitions, 4696 flow [2024-06-27 20:09:26,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:26,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:26,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:26,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:09:26,209 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:26,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:26,209 INFO L85 PathProgramCache]: Analyzing trace with hash 14721959, now seen corresponding path program 11 times [2024-06-27 20:09:26,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:26,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698279996] [2024-06-27 20:09:26,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:26,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:26,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:26,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698279996] [2024-06-27 20:09:26,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698279996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:26,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:26,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:26,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701164178] [2024-06-27 20:09:26,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:26,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:26,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:26,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:26,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:26,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:26,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 410 transitions, 4696 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:26,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:26,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:26,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:27,977 INFO L124 PetriNetUnfolderBase]: 3799/5688 cut-off events. [2024-06-27 20:09:27,977 INFO L125 PetriNetUnfolderBase]: For 903047/903050 co-relation queries the response was YES. [2024-06-27 20:09:28,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51233 conditions, 5688 events. 3799/5688 cut-off events. For 903047/903050 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 30177 event pairs, 891 based on Foata normal form. 4/5689 useless extension candidates. Maximal degree in co-relation 51090. Up to 5623 conditions per place. [2024-06-27 20:09:28,050 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 386 selfloop transitions, 34 changer transitions 0/423 dead transitions. [2024-06-27 20:09:28,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 423 transitions, 5574 flow [2024-06-27 20:09:28,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:09:28,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 20:09:28,051 INFO L175 Difference]: Start difference. First operand has 303 places, 410 transitions, 4696 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:09:28,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 423 transitions, 5574 flow [2024-06-27 20:09:29,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 423 transitions, 5412 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-27 20:09:29,401 INFO L231 Difference]: Finished difference. Result has 305 places, 410 transitions, 4608 flow [2024-06-27 20:09:29,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4534, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4608, PETRI_PLACES=305, PETRI_TRANSITIONS=410} [2024-06-27 20:09:29,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-27 20:09:29,402 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 410 transitions, 4608 flow [2024-06-27 20:09:29,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:29,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:29,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:29,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:09:29,402 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:29,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:29,402 INFO L85 PathProgramCache]: Analyzing trace with hash 243039005, now seen corresponding path program 8 times [2024-06-27 20:09:29,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:29,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936511132] [2024-06-27 20:09:29,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:29,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:29,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:29,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:29,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936511132] [2024-06-27 20:09:29,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936511132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:29,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:29,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:29,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585670082] [2024-06-27 20:09:29,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:29,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:29,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:29,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:29,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:29,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:29,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 410 transitions, 4608 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:29,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:29,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:29,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:31,206 INFO L124 PetriNetUnfolderBase]: 3814/5708 cut-off events. [2024-06-27 20:09:31,206 INFO L125 PetriNetUnfolderBase]: For 925264/925267 co-relation queries the response was YES. [2024-06-27 20:09:31,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51429 conditions, 5708 events. 3814/5708 cut-off events. For 925264/925267 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30284 event pairs, 887 based on Foata normal form. 5/5711 useless extension candidates. Maximal degree in co-relation 51285. Up to 5656 conditions per place. [2024-06-27 20:09:31,272 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 394 selfloop transitions, 30 changer transitions 0/427 dead transitions. [2024-06-27 20:09:31,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 427 transitions, 5545 flow [2024-06-27 20:09:31,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:31,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 20:09:31,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 20:09:31,273 INFO L175 Difference]: Start difference. First operand has 305 places, 410 transitions, 4608 flow. Second operand 8 states and 123 transitions. [2024-06-27 20:09:31,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 427 transitions, 5545 flow [2024-06-27 20:09:32,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 427 transitions, 5399 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 20:09:32,604 INFO L231 Difference]: Finished difference. Result has 305 places, 414 transitions, 4585 flow [2024-06-27 20:09:32,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4462, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4585, PETRI_PLACES=305, PETRI_TRANSITIONS=414} [2024-06-27 20:09:32,605 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-27 20:09:32,605 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 414 transitions, 4585 flow [2024-06-27 20:09:32,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:32,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:32,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:32,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:09:32,605 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:32,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:32,606 INFO L85 PathProgramCache]: Analyzing trace with hash -517391495, now seen corresponding path program 9 times [2024-06-27 20:09:32,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:32,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830490632] [2024-06-27 20:09:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:32,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:32,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:33,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:33,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830490632] [2024-06-27 20:09:33,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830490632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:33,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:33,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:33,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926854221] [2024-06-27 20:09:33,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:33,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:33,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:33,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:33,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:33,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:33,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 414 transitions, 4585 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:33,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:33,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:33,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:34,354 INFO L124 PetriNetUnfolderBase]: 3805/5696 cut-off events. [2024-06-27 20:09:34,355 INFO L125 PetriNetUnfolderBase]: For 931722/931725 co-relation queries the response was YES. [2024-06-27 20:09:34,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51208 conditions, 5696 events. 3805/5696 cut-off events. For 931722/931725 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30208 event pairs, 883 based on Foata normal form. 5/5699 useless extension candidates. Maximal degree in co-relation 51064. Up to 5618 conditions per place. [2024-06-27 20:09:34,434 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 390 selfloop transitions, 37 changer transitions 0/430 dead transitions. [2024-06-27 20:09:34,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 430 transitions, 5675 flow [2024-06-27 20:09:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:34,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:09:34,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:09:34,435 INFO L175 Difference]: Start difference. First operand has 305 places, 414 transitions, 4585 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:09:34,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 430 transitions, 5675 flow [2024-06-27 20:09:36,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 430 transitions, 5603 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 20:09:36,042 INFO L231 Difference]: Finished difference. Result has 308 places, 414 transitions, 4593 flow [2024-06-27 20:09:36,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4513, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4593, PETRI_PLACES=308, PETRI_TRANSITIONS=414} [2024-06-27 20:09:36,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-27 20:09:36,043 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 414 transitions, 4593 flow [2024-06-27 20:09:36,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:36,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:36,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:36,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:09:36,043 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:36,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1181956719, now seen corresponding path program 10 times [2024-06-27 20:09:36,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:36,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106303994] [2024-06-27 20:09:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:36,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:36,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:36,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:36,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106303994] [2024-06-27 20:09:36,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106303994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:36,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:36,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:36,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360109444] [2024-06-27 20:09:36,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:36,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:36,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:36,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:36,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:36,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:36,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 414 transitions, 4593 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:36,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:36,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:36,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:37,755 INFO L124 PetriNetUnfolderBase]: 3790/5675 cut-off events. [2024-06-27 20:09:37,755 INFO L125 PetriNetUnfolderBase]: For 938133/938136 co-relation queries the response was YES. [2024-06-27 20:09:37,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51023 conditions, 5675 events. 3790/5675 cut-off events. For 938133/938136 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30101 event pairs, 881 based on Foata normal form. 5/5678 useless extension candidates. Maximal degree in co-relation 50878. Up to 5623 conditions per place. [2024-06-27 20:09:37,829 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 395 selfloop transitions, 29 changer transitions 0/427 dead transitions. [2024-06-27 20:09:37,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 427 transitions, 5479 flow [2024-06-27 20:09:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:37,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:37,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 20:09:37,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-27 20:09:37,830 INFO L175 Difference]: Start difference. First operand has 308 places, 414 transitions, 4593 flow. Second operand 8 states and 124 transitions. [2024-06-27 20:09:37,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 427 transitions, 5479 flow [2024-06-27 20:09:39,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 427 transitions, 5353 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-27 20:09:39,327 INFO L231 Difference]: Finished difference. Result has 310 places, 414 transitions, 4531 flow [2024-06-27 20:09:39,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4531, PETRI_PLACES=310, PETRI_TRANSITIONS=414} [2024-06-27 20:09:39,327 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-27 20:09:39,327 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 414 transitions, 4531 flow [2024-06-27 20:09:39,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:39,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:39,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:39,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:09:39,327 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:39,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:39,328 INFO L85 PathProgramCache]: Analyzing trace with hash -522033311, now seen corresponding path program 12 times [2024-06-27 20:09:39,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:39,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326257706] [2024-06-27 20:09:39,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:39,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:39,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:39,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326257706] [2024-06-27 20:09:39,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326257706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:39,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:39,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:39,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832390395] [2024-06-27 20:09:39,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:39,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:39,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:39,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:39,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:39,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:39,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 414 transitions, 4531 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:39,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:39,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:39,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:41,275 INFO L124 PetriNetUnfolderBase]: 3778/5660 cut-off events. [2024-06-27 20:09:41,275 INFO L125 PetriNetUnfolderBase]: For 943467/943470 co-relation queries the response was YES. [2024-06-27 20:09:41,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50610 conditions, 5660 events. 3778/5660 cut-off events. For 943467/943470 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30028 event pairs, 883 based on Foata normal form. 6/5663 useless extension candidates. Maximal degree in co-relation 50464. Up to 5510 conditions per place. [2024-06-27 20:09:41,353 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 373 selfloop transitions, 52 changer transitions 0/428 dead transitions. [2024-06-27 20:09:41,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 428 transitions, 5609 flow [2024-06-27 20:09:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:41,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 20:09:41,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-27 20:09:41,356 INFO L175 Difference]: Start difference. First operand has 310 places, 414 transitions, 4531 flow. Second operand 8 states and 130 transitions. [2024-06-27 20:09:41,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 428 transitions, 5609 flow [2024-06-27 20:09:42,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 428 transitions, 5450 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-06-27 20:09:42,866 INFO L231 Difference]: Finished difference. Result has 308 places, 414 transitions, 4483 flow [2024-06-27 20:09:42,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4372, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4483, PETRI_PLACES=308, PETRI_TRANSITIONS=414} [2024-06-27 20:09:42,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-27 20:09:42,867 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 414 transitions, 4483 flow [2024-06-27 20:09:42,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:42,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:42,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:42,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:09:42,867 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:42,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:42,867 INFO L85 PathProgramCache]: Analyzing trace with hash -522033125, now seen corresponding path program 11 times [2024-06-27 20:09:42,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:42,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337174553] [2024-06-27 20:09:42,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:42,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:43,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:43,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337174553] [2024-06-27 20:09:43,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337174553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:43,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:43,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:43,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113800240] [2024-06-27 20:09:43,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:43,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:43,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:43,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:43,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:43,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:43,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 414 transitions, 4483 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:43,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:43,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:43,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:44,711 INFO L124 PetriNetUnfolderBase]: 3808/5701 cut-off events. [2024-06-27 20:09:44,711 INFO L125 PetriNetUnfolderBase]: For 971580/971583 co-relation queries the response was YES. [2024-06-27 20:09:44,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51001 conditions, 5701 events. 3808/5701 cut-off events. For 971580/971583 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30215 event pairs, 859 based on Foata normal form. 8/5707 useless extension candidates. Maximal degree in co-relation 50854. Up to 5373 conditions per place. [2024-06-27 20:09:44,777 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 362 selfloop transitions, 71 changer transitions 0/436 dead transitions. [2024-06-27 20:09:44,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 436 transitions, 5649 flow [2024-06-27 20:09:44,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:44,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 20:09:44,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-27 20:09:44,778 INFO L175 Difference]: Start difference. First operand has 308 places, 414 transitions, 4483 flow. Second operand 8 states and 134 transitions. [2024-06-27 20:09:44,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 436 transitions, 5649 flow [2024-06-27 20:09:46,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 436 transitions, 5467 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-27 20:09:46,556 INFO L231 Difference]: Finished difference. Result has 309 places, 418 transitions, 4496 flow [2024-06-27 20:09:46,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4301, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4496, PETRI_PLACES=309, PETRI_TRANSITIONS=418} [2024-06-27 20:09:46,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-27 20:09:46,556 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 418 transitions, 4496 flow [2024-06-27 20:09:46,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:46,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:46,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:46,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:09:46,557 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:46,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:46,557 INFO L85 PathProgramCache]: Analyzing trace with hash -521795975, now seen corresponding path program 12 times [2024-06-27 20:09:46,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:46,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927615921] [2024-06-27 20:09:46,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:46,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:46,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:47,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:47,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927615921] [2024-06-27 20:09:47,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927615921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:47,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:47,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:09:47,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946546557] [2024-06-27 20:09:47,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:47,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:09:47,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:47,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:09:47,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:09:47,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:47,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 418 transitions, 4496 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:47,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:47,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:47,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:48,301 INFO L124 PetriNetUnfolderBase]: 3784/5668 cut-off events. [2024-06-27 20:09:48,302 INFO L125 PetriNetUnfolderBase]: For 962984/962987 co-relation queries the response was YES. [2024-06-27 20:09:48,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50543 conditions, 5668 events. 3784/5668 cut-off events. For 962984/962987 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30101 event pairs, 865 based on Foata normal form. 8/5674 useless extension candidates. Maximal degree in co-relation 50395. Up to 5355 conditions per place. [2024-06-27 20:09:48,379 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 364 selfloop transitions, 68 changer transitions 0/435 dead transitions. [2024-06-27 20:09:48,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 435 transitions, 5422 flow [2024-06-27 20:09:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:09:48,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:09:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 20:09:48,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-27 20:09:48,380 INFO L175 Difference]: Start difference. First operand has 309 places, 418 transitions, 4496 flow. Second operand 8 states and 133 transitions. [2024-06-27 20:09:48,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 435 transitions, 5422 flow [2024-06-27 20:09:49,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 435 transitions, 5180 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 20:09:49,990 INFO L231 Difference]: Finished difference. Result has 310 places, 418 transitions, 4399 flow [2024-06-27 20:09:49,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4254, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4399, PETRI_PLACES=310, PETRI_TRANSITIONS=418} [2024-06-27 20:09:49,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 268 predicate places. [2024-06-27 20:09:49,991 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 418 transitions, 4399 flow [2024-06-27 20:09:49,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 20:09:49,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:49,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:49,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:09:49,992 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:49,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:49,992 INFO L85 PathProgramCache]: Analyzing trace with hash -162522153, now seen corresponding path program 5 times [2024-06-27 20:09:49,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:49,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671702355] [2024-06-27 20:09:49,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:49,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:50,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:50,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671702355] [2024-06-27 20:09:50,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671702355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:50,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:50,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:50,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747953857] [2024-06-27 20:09:50,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:50,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:50,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:50,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:50,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:50,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:50,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 418 transitions, 4399 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:50,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:50,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:50,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:51,997 INFO L124 PetriNetUnfolderBase]: 3814/5710 cut-off events. [2024-06-27 20:09:51,997 INFO L125 PetriNetUnfolderBase]: For 982369/982372 co-relation queries the response was YES. [2024-06-27 20:09:52,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50969 conditions, 5710 events. 3814/5710 cut-off events. For 982369/982372 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30372 event pairs, 858 based on Foata normal form. 8/5716 useless extension candidates. Maximal degree in co-relation 50820. Up to 5375 conditions per place. [2024-06-27 20:09:52,078 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 356 selfloop transitions, 83 changer transitions 0/442 dead transitions. [2024-06-27 20:09:52,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 442 transitions, 5436 flow [2024-06-27 20:09:52,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:52,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:09:52,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 20:09:52,079 INFO L175 Difference]: Start difference. First operand has 310 places, 418 transitions, 4399 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:09:52,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 442 transitions, 5436 flow [2024-06-27 20:09:53,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 442 transitions, 5263 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 20:09:53,388 INFO L231 Difference]: Finished difference. Result has 311 places, 423 transitions, 4501 flow [2024-06-27 20:09:53,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4226, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4501, PETRI_PLACES=311, PETRI_TRANSITIONS=423} [2024-06-27 20:09:53,388 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-27 20:09:53,388 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 423 transitions, 4501 flow [2024-06-27 20:09:53,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:53,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:53,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:53,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:09:53,389 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:53,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:53,389 INFO L85 PathProgramCache]: Analyzing trace with hash -162532693, now seen corresponding path program 4 times [2024-06-27 20:09:53,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:53,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877201894] [2024-06-27 20:09:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:53,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:54,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:54,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877201894] [2024-06-27 20:09:54,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877201894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:54,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:54,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:54,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429062313] [2024-06-27 20:09:54,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:54,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:54,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:54,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:54,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:54,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:54,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 423 transitions, 4501 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:54,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:54,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:54,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:55,467 INFO L124 PetriNetUnfolderBase]: 3804/5696 cut-off events. [2024-06-27 20:09:55,468 INFO L125 PetriNetUnfolderBase]: For 973221/973224 co-relation queries the response was YES. [2024-06-27 20:09:55,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50819 conditions, 5696 events. 3804/5696 cut-off events. For 973221/973224 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30241 event pairs, 884 based on Foata normal form. 6/5700 useless extension candidates. Maximal degree in co-relation 50669. Up to 5622 conditions per place. [2024-06-27 20:09:55,534 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 396 selfloop transitions, 38 changer transitions 0/437 dead transitions. [2024-06-27 20:09:55,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 437 transitions, 5408 flow [2024-06-27 20:09:55,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 20:09:55,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-27 20:09:55,535 INFO L175 Difference]: Start difference. First operand has 311 places, 423 transitions, 4501 flow. Second operand 9 states and 137 transitions. [2024-06-27 20:09:55,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 437 transitions, 5408 flow [2024-06-27 20:09:56,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 437 transitions, 5160 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 20:09:56,862 INFO L231 Difference]: Finished difference. Result has 313 places, 424 transitions, 4346 flow [2024-06-27 20:09:56,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4346, PETRI_PLACES=313, PETRI_TRANSITIONS=424} [2024-06-27 20:09:56,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-27 20:09:56,862 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 424 transitions, 4346 flow [2024-06-27 20:09:56,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:56,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:09:56,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:09:56,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:09:56,863 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:09:56,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:09:56,863 INFO L85 PathProgramCache]: Analyzing trace with hash -162176193, now seen corresponding path program 6 times [2024-06-27 20:09:56,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:09:56,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376577909] [2024-06-27 20:09:56,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:09:56,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:09:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:09:57,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:09:57,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:09:57,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376577909] [2024-06-27 20:09:57,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376577909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:09:57,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:09:57,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:09:57,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099072340] [2024-06-27 20:09:57,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:09:57,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:09:57,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:09:57,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:09:57,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:09:57,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:09:57,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 424 transitions, 4346 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:09:57,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:09:57,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:09:57,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:09:58,874 INFO L124 PetriNetUnfolderBase]: 3834/5738 cut-off events. [2024-06-27 20:09:58,874 INFO L125 PetriNetUnfolderBase]: For 1001904/1001907 co-relation queries the response was YES. [2024-06-27 20:09:58,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50913 conditions, 5738 events. 3834/5738 cut-off events. For 1001904/1001907 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 30499 event pairs, 868 based on Foata normal form. 8/5744 useless extension candidates. Maximal degree in co-relation 50762. Up to 5403 conditions per place. [2024-06-27 20:09:58,953 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 370 selfloop transitions, 75 changer transitions 0/448 dead transitions. [2024-06-27 20:09:58,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 448 transitions, 5405 flow [2024-06-27 20:09:58,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:09:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:09:58,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 20:09:58,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-27 20:09:58,954 INFO L175 Difference]: Start difference. First operand has 313 places, 424 transitions, 4346 flow. Second operand 9 states and 148 transitions. [2024-06-27 20:09:58,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 448 transitions, 5405 flow [2024-06-27 20:10:00,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 448 transitions, 5319 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-27 20:10:00,514 INFO L231 Difference]: Finished difference. Result has 315 places, 429 transitions, 4529 flow [2024-06-27 20:10:00,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4260, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4529, PETRI_PLACES=315, PETRI_TRANSITIONS=429} [2024-06-27 20:10:00,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-27 20:10:00,515 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 429 transitions, 4529 flow [2024-06-27 20:10:00,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:00,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:00,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:00,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:10:00,516 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:00,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:00,516 INFO L85 PathProgramCache]: Analyzing trace with hash -162532383, now seen corresponding path program 7 times [2024-06-27 20:10:00,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:00,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624732319] [2024-06-27 20:10:00,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:00,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:01,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:01,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624732319] [2024-06-27 20:10:01,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624732319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:01,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:01,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:01,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607174575] [2024-06-27 20:10:01,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:01,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:01,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:01,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:01,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:01,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:01,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 429 transitions, 4529 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:01,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:01,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:01,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:02,600 INFO L124 PetriNetUnfolderBase]: 3844/5752 cut-off events. [2024-06-27 20:10:02,601 INFO L125 PetriNetUnfolderBase]: For 1002414/1002417 co-relation queries the response was YES. [2024-06-27 20:10:02,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51527 conditions, 5752 events. 3844/5752 cut-off events. For 1002414/1002417 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30576 event pairs, 854 based on Foata normal form. 4/5754 useless extension candidates. Maximal degree in co-relation 51375. Up to 5353 conditions per place. [2024-06-27 20:10:02,678 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 351 selfloop transitions, 101 changer transitions 0/455 dead transitions. [2024-06-27 20:10:02,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 455 transitions, 5801 flow [2024-06-27 20:10:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:10:02,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:10:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-27 20:10:02,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-27 20:10:02,679 INFO L175 Difference]: Start difference. First operand has 315 places, 429 transitions, 4529 flow. Second operand 10 states and 165 transitions. [2024-06-27 20:10:02,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 455 transitions, 5801 flow [2024-06-27 20:10:04,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 455 transitions, 5581 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 20:10:04,233 INFO L231 Difference]: Finished difference. Result has 318 places, 433 transitions, 4616 flow [2024-06-27 20:10:04,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4309, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4616, PETRI_PLACES=318, PETRI_TRANSITIONS=433} [2024-06-27 20:10:04,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-27 20:10:04,234 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 433 transitions, 4616 flow [2024-06-27 20:10:04,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:04,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:04,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:04,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:10:04,234 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:04,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash 237321117, now seen corresponding path program 8 times [2024-06-27 20:10:04,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:04,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514114666] [2024-06-27 20:10:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:04,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:04,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:04,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:04,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514114666] [2024-06-27 20:10:04,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514114666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:04,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:04,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:04,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987256111] [2024-06-27 20:10:04,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:04,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:04,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:04,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:04,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:05,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:05,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 433 transitions, 4616 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:05,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:05,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:05,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:06,248 INFO L124 PetriNetUnfolderBase]: 3838/5744 cut-off events. [2024-06-27 20:10:06,249 INFO L125 PetriNetUnfolderBase]: For 1010683/1010686 co-relation queries the response was YES. [2024-06-27 20:10:06,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51388 conditions, 5744 events. 3838/5744 cut-off events. For 1010683/1010686 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30518 event pairs, 874 based on Foata normal form. 4/5746 useless extension candidates. Maximal degree in co-relation 51235. Up to 5665 conditions per place. [2024-06-27 20:10:06,329 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 416 selfloop transitions, 45 changer transitions 0/464 dead transitions. [2024-06-27 20:10:06,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 464 transitions, 5789 flow [2024-06-27 20:10:06,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:06,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:06,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 137 transitions. [2024-06-27 20:10:06,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3712737127371274 [2024-06-27 20:10:06,330 INFO L175 Difference]: Start difference. First operand has 318 places, 433 transitions, 4616 flow. Second operand 9 states and 137 transitions. [2024-06-27 20:10:06,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 464 transitions, 5789 flow [2024-06-27 20:10:07,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 464 transitions, 5468 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-27 20:10:07,878 INFO L231 Difference]: Finished difference. Result has 321 places, 451 transitions, 4667 flow [2024-06-27 20:10:07,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4327, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4667, PETRI_PLACES=321, PETRI_TRANSITIONS=451} [2024-06-27 20:10:07,878 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-27 20:10:07,878 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 451 transitions, 4667 flow [2024-06-27 20:10:07,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:07,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:07,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:07,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:10:07,879 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:07,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:07,879 INFO L85 PathProgramCache]: Analyzing trace with hash 251143149, now seen corresponding path program 1 times [2024-06-27 20:10:07,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:07,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129933390] [2024-06-27 20:10:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:07,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:08,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:08,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129933390] [2024-06-27 20:10:08,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129933390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:08,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:08,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:08,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041126935] [2024-06-27 20:10:08,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:08,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:08,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:08,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:08,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:08,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:08,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 451 transitions, 4667 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:08,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:08,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:08,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:10,041 INFO L124 PetriNetUnfolderBase]: 3848/5776 cut-off events. [2024-06-27 20:10:10,041 INFO L125 PetriNetUnfolderBase]: For 1032916/1032919 co-relation queries the response was YES. [2024-06-27 20:10:10,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51342 conditions, 5776 events. 3848/5776 cut-off events. For 1032916/1032919 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30997 event pairs, 1485 based on Foata normal form. 6/5780 useless extension candidates. Maximal degree in co-relation 51186. Up to 5618 conditions per place. [2024-06-27 20:10:10,106 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 424 selfloop transitions, 50 changer transitions 0/477 dead transitions. [2024-06-27 20:10:10,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 477 transitions, 6087 flow [2024-06-27 20:10:10,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:10:10,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:10:10,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 150 transitions. [2024-06-27 20:10:10,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 20:10:10,107 INFO L175 Difference]: Start difference. First operand has 321 places, 451 transitions, 4667 flow. Second operand 10 states and 150 transitions. [2024-06-27 20:10:10,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 477 transitions, 6087 flow [2024-06-27 20:10:12,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 477 transitions, 5970 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 20:10:12,018 INFO L231 Difference]: Finished difference. Result has 329 places, 461 transitions, 4879 flow [2024-06-27 20:10:12,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4879, PETRI_PLACES=329, PETRI_TRANSITIONS=461} [2024-06-27 20:10:12,019 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-27 20:10:12,019 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 461 transitions, 4879 flow [2024-06-27 20:10:12,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:12,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:12,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:12,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:10:12,019 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:12,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:12,019 INFO L85 PathProgramCache]: Analyzing trace with hash 251618813, now seen corresponding path program 1 times [2024-06-27 20:10:12,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:12,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187202927] [2024-06-27 20:10:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:12,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:12,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:12,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187202927] [2024-06-27 20:10:12,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187202927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:12,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:12,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:12,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991839023] [2024-06-27 20:10:12,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:12,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:12,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:12,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:12,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:13,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:13,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 461 transitions, 4879 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:13,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:13,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:13,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:14,299 INFO L124 PetriNetUnfolderBase]: 3843/5768 cut-off events. [2024-06-27 20:10:14,300 INFO L125 PetriNetUnfolderBase]: For 1034995/1034995 co-relation queries the response was YES. [2024-06-27 20:10:14,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51840 conditions, 5768 events. 3843/5768 cut-off events. For 1034995/1034995 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 30880 event pairs, 1488 based on Foata normal form. 1/5768 useless extension candidates. Maximal degree in co-relation 51680. Up to 5718 conditions per place. [2024-06-27 20:10:14,383 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 449 selfloop transitions, 23 changer transitions 0/475 dead transitions. [2024-06-27 20:10:14,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 475 transitions, 5944 flow [2024-06-27 20:10:14,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:10:14,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:10:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-27 20:10:14,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-27 20:10:14,384 INFO L175 Difference]: Start difference. First operand has 329 places, 461 transitions, 4879 flow. Second operand 8 states and 120 transitions. [2024-06-27 20:10:14,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 475 transitions, 5944 flow [2024-06-27 20:10:16,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 475 transitions, 5792 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-27 20:10:16,749 INFO L231 Difference]: Finished difference. Result has 334 places, 464 transitions, 4882 flow [2024-06-27 20:10:16,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4739, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4882, PETRI_PLACES=334, PETRI_TRANSITIONS=464} [2024-06-27 20:10:16,749 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-27 20:10:16,749 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 464 transitions, 4882 flow [2024-06-27 20:10:16,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:16,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:16,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:16,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:10:16,750 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:16,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:16,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1472121027, now seen corresponding path program 1 times [2024-06-27 20:10:16,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:16,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240091850] [2024-06-27 20:10:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:16,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:17,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:17,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:17,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240091850] [2024-06-27 20:10:17,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240091850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:17,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:17,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:17,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521826488] [2024-06-27 20:10:17,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:17,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:17,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:17,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:17,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:17,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:17,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 464 transitions, 4882 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:17,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:17,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:17,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:19,157 INFO L124 PetriNetUnfolderBase]: 3864/5799 cut-off events. [2024-06-27 20:10:19,158 INFO L125 PetriNetUnfolderBase]: For 1072611/1072611 co-relation queries the response was YES. [2024-06-27 20:10:19,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52298 conditions, 5799 events. 3864/5799 cut-off events. For 1072611/1072611 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31029 event pairs, 1447 based on Foata normal form. 2/5800 useless extension candidates. Maximal degree in co-relation 52135. Up to 5700 conditions per place. [2024-06-27 20:10:19,239 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 463 selfloop transitions, 25 changer transitions 0/491 dead transitions. [2024-06-27 20:10:19,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 491 transitions, 6218 flow [2024-06-27 20:10:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:19,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:19,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-27 20:10:19,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-27 20:10:19,240 INFO L175 Difference]: Start difference. First operand has 334 places, 464 transitions, 4882 flow. Second operand 9 states and 143 transitions. [2024-06-27 20:10:19,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 491 transitions, 6218 flow [2024-06-27 20:10:21,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 491 transitions, 6095 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-27 20:10:21,327 INFO L231 Difference]: Finished difference. Result has 336 places, 468 transitions, 4914 flow [2024-06-27 20:10:21,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4759, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4914, PETRI_PLACES=336, PETRI_TRANSITIONS=468} [2024-06-27 20:10:21,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 294 predicate places. [2024-06-27 20:10:21,328 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 468 transitions, 4914 flow [2024-06-27 20:10:21,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:21,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:21,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:21,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:10:21,328 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:21,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:21,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1465853351, now seen corresponding path program 2 times [2024-06-27 20:10:21,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:21,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860179039] [2024-06-27 20:10:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:21,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:21,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:22,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:22,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860179039] [2024-06-27 20:10:22,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860179039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:22,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:22,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:22,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620471605] [2024-06-27 20:10:22,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:22,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:22,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:22,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:22,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:22,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:22,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 468 transitions, 4914 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:22,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:22,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:22,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:23,737 INFO L124 PetriNetUnfolderBase]: 3859/5792 cut-off events. [2024-06-27 20:10:23,737 INFO L125 PetriNetUnfolderBase]: For 1081623/1081623 co-relation queries the response was YES. [2024-06-27 20:10:23,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52121 conditions, 5792 events. 3859/5792 cut-off events. For 1081623/1081623 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 31051 event pairs, 1488 based on Foata normal form. 2/5793 useless extension candidates. Maximal degree in co-relation 51958. Up to 5722 conditions per place. [2024-06-27 20:10:23,816 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 461 selfloop transitions, 21 changer transitions 0/485 dead transitions. [2024-06-27 20:10:23,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 485 transitions, 5920 flow [2024-06-27 20:10:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:10:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:10:23,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 20:10:23,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-27 20:10:23,817 INFO L175 Difference]: Start difference. First operand has 336 places, 468 transitions, 4914 flow. Second operand 8 states and 126 transitions. [2024-06-27 20:10:23,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 485 transitions, 5920 flow [2024-06-27 20:10:25,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 485 transitions, 5786 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 20:10:25,870 INFO L231 Difference]: Finished difference. Result has 339 places, 468 transitions, 4827 flow [2024-06-27 20:10:25,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4780, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4827, PETRI_PLACES=339, PETRI_TRANSITIONS=468} [2024-06-27 20:10:25,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-27 20:10:25,870 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 468 transitions, 4827 flow [2024-06-27 20:10:25,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:25,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:25,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:25,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:10:25,871 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:25,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:25,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2093379579, now seen corresponding path program 3 times [2024-06-27 20:10:25,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:25,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456946438] [2024-06-27 20:10:25,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:25,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:26,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:26,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456946438] [2024-06-27 20:10:26,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456946438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:26,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:26,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:26,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021238906] [2024-06-27 20:10:26,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:26,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:26,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:26,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:26,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:26,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:26,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 468 transitions, 4827 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:26,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:26,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:26,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:28,168 INFO L124 PetriNetUnfolderBase]: 3867/5804 cut-off events. [2024-06-27 20:10:28,169 INFO L125 PetriNetUnfolderBase]: For 1101574/1101574 co-relation queries the response was YES. [2024-06-27 20:10:28,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52215 conditions, 5804 events. 3867/5804 cut-off events. For 1101574/1101574 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31087 event pairs, 1489 based on Foata normal form. 2/5805 useless extension candidates. Maximal degree in co-relation 52050. Up to 5713 conditions per place. [2024-06-27 20:10:28,247 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 444 selfloop transitions, 37 changer transitions 0/484 dead transitions. [2024-06-27 20:10:28,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 484 transitions, 5875 flow [2024-06-27 20:10:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:10:28,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:10:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 20:10:28,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-27 20:10:28,248 INFO L175 Difference]: Start difference. First operand has 339 places, 468 transitions, 4827 flow. Second operand 8 states and 128 transitions. [2024-06-27 20:10:28,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 484 transitions, 5875 flow [2024-06-27 20:10:29,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 484 transitions, 5828 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 20:10:29,842 INFO L231 Difference]: Finished difference. Result has 340 places, 470 transitions, 4915 flow [2024-06-27 20:10:29,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4780, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4915, PETRI_PLACES=340, PETRI_TRANSITIONS=470} [2024-06-27 20:10:29,842 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-27 20:10:29,842 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 470 transitions, 4915 flow [2024-06-27 20:10:29,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:29,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:29,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:29,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:10:29,843 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:29,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:29,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1246942951, now seen corresponding path program 4 times [2024-06-27 20:10:29,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:29,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877670125] [2024-06-27 20:10:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:29,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:30,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:30,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:30,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877670125] [2024-06-27 20:10:30,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877670125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:30,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:30,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:30,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057283532] [2024-06-27 20:10:30,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:30,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:30,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:30,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:30,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:30,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:30,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 470 transitions, 4915 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:30,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:30,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:30,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:32,210 INFO L124 PetriNetUnfolderBase]: 3862/5799 cut-off events. [2024-06-27 20:10:32,210 INFO L125 PetriNetUnfolderBase]: For 1109376/1109379 co-relation queries the response was YES. [2024-06-27 20:10:32,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52277 conditions, 5799 events. 3862/5799 cut-off events. For 1109376/1109379 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31097 event pairs, 1499 based on Foata normal form. 2/5798 useless extension candidates. Maximal degree in co-relation 52111. Up to 5706 conditions per place. [2024-06-27 20:10:32,282 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 443 selfloop transitions, 37 changer transitions 0/483 dead transitions. [2024-06-27 20:10:32,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 483 transitions, 5957 flow [2024-06-27 20:10:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:10:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:10:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 20:10:32,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-27 20:10:32,283 INFO L175 Difference]: Start difference. First operand has 340 places, 470 transitions, 4915 flow. Second operand 8 states and 125 transitions. [2024-06-27 20:10:32,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 483 transitions, 5957 flow [2024-06-27 20:10:34,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 483 transitions, 5838 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:10:34,081 INFO L231 Difference]: Finished difference. Result has 342 places, 472 transitions, 4935 flow [2024-06-27 20:10:34,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4935, PETRI_PLACES=342, PETRI_TRANSITIONS=472} [2024-06-27 20:10:34,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 300 predicate places. [2024-06-27 20:10:34,082 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 472 transitions, 4935 flow [2024-06-27 20:10:34,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:34,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:34,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:34,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:10:34,082 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:34,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:34,082 INFO L85 PathProgramCache]: Analyzing trace with hash 907537360, now seen corresponding path program 1 times [2024-06-27 20:10:34,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:34,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690105968] [2024-06-27 20:10:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:34,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:34,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:34,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690105968] [2024-06-27 20:10:34,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690105968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:34,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:34,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:10:34,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915382826] [2024-06-27 20:10:34,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:34,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:10:34,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:34,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:10:34,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:10:34,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:34,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 472 transitions, 4935 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:34,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:34,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:34,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:36,200 INFO L124 PetriNetUnfolderBase]: 4138/6193 cut-off events. [2024-06-27 20:10:36,200 INFO L125 PetriNetUnfolderBase]: For 1136192/1136211 co-relation queries the response was YES. [2024-06-27 20:10:36,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55924 conditions, 6193 events. 4138/6193 cut-off events. For 1136192/1136211 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 33286 event pairs, 855 based on Foata normal form. 19/6210 useless extension candidates. Maximal degree in co-relation 55757. Up to 5720 conditions per place. [2024-06-27 20:10:36,294 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 474 selfloop transitions, 116 changer transitions 0/593 dead transitions. [2024-06-27 20:10:36,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 593 transitions, 8029 flow [2024-06-27 20:10:36,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:10:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:10:36,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:10:36,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:10:36,295 INFO L175 Difference]: Start difference. First operand has 342 places, 472 transitions, 4935 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:10:36,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 593 transitions, 8029 flow [2024-06-27 20:10:38,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 593 transitions, 7906 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-27 20:10:38,212 INFO L231 Difference]: Finished difference. Result has 349 places, 540 transitions, 6039 flow [2024-06-27 20:10:38,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4812, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6039, PETRI_PLACES=349, PETRI_TRANSITIONS=540} [2024-06-27 20:10:38,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-27 20:10:38,213 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 540 transitions, 6039 flow [2024-06-27 20:10:38,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:38,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:38,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:38,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:10:38,213 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:38,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:38,214 INFO L85 PathProgramCache]: Analyzing trace with hash 104917782, now seen corresponding path program 2 times [2024-06-27 20:10:38,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:38,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695542918] [2024-06-27 20:10:38,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:38,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:38,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:38,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:38,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695542918] [2024-06-27 20:10:38,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695542918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:38,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:38,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:10:38,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791922033] [2024-06-27 20:10:38,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:38,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:10:38,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:38,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:10:38,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:10:38,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:38,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 540 transitions, 6039 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:38,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:38,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:38,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:40,128 INFO L124 PetriNetUnfolderBase]: 4143/6200 cut-off events. [2024-06-27 20:10:40,128 INFO L125 PetriNetUnfolderBase]: For 1160060/1160079 co-relation queries the response was YES. [2024-06-27 20:10:40,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57606 conditions, 6200 events. 4143/6200 cut-off events. For 1160060/1160079 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 33306 event pairs, 870 based on Foata normal form. 19/6217 useless extension candidates. Maximal degree in co-relation 57434. Up to 5726 conditions per place. [2024-06-27 20:10:40,220 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 468 selfloop transitions, 121 changer transitions 0/592 dead transitions. [2024-06-27 20:10:40,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 592 transitions, 8377 flow [2024-06-27 20:10:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:10:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:10:40,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:10:40,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-27 20:10:40,221 INFO L175 Difference]: Start difference. First operand has 349 places, 540 transitions, 6039 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:10:40,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 592 transitions, 8377 flow [2024-06-27 20:10:42,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 592 transitions, 8266 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-27 20:10:42,383 INFO L231 Difference]: Finished difference. Result has 356 places, 546 transitions, 6326 flow [2024-06-27 20:10:42,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5944, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6326, PETRI_PLACES=356, PETRI_TRANSITIONS=546} [2024-06-27 20:10:42,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-27 20:10:42,384 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 546 transitions, 6326 flow [2024-06-27 20:10:42,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:42,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:42,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:42,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:10:42,384 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:42,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:42,384 INFO L85 PathProgramCache]: Analyzing trace with hash 121212312, now seen corresponding path program 3 times [2024-06-27 20:10:42,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:42,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159491967] [2024-06-27 20:10:42,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:42,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:42,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:42,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159491967] [2024-06-27 20:10:42,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159491967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:42,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:42,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:10:42,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665243175] [2024-06-27 20:10:42,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:42,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:10:42,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:42,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:10:42,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:10:42,960 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:42,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 546 transitions, 6326 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:42,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:42,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:42,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:44,371 INFO L124 PetriNetUnfolderBase]: 4140/6197 cut-off events. [2024-06-27 20:10:44,371 INFO L125 PetriNetUnfolderBase]: For 1174517/1174536 co-relation queries the response was YES. [2024-06-27 20:10:44,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58023 conditions, 6197 events. 4140/6197 cut-off events. For 1174517/1174536 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 33326 event pairs, 871 based on Foata normal form. 19/6214 useless extension candidates. Maximal degree in co-relation 57848. Up to 5723 conditions per place. [2024-06-27 20:10:44,461 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 463 selfloop transitions, 123 changer transitions 0/589 dead transitions. [2024-06-27 20:10:44,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 589 transitions, 8347 flow [2024-06-27 20:10:44,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:10:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:10:44,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 20:10:44,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:10:44,462 INFO L175 Difference]: Start difference. First operand has 356 places, 546 transitions, 6326 flow. Second operand 8 states and 144 transitions. [2024-06-27 20:10:44,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 589 transitions, 8347 flow [2024-06-27 20:10:46,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 589 transitions, 8123 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 20:10:46,192 INFO L231 Difference]: Finished difference. Result has 360 places, 555 transitions, 6552 flow [2024-06-27 20:10:46,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6105, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6552, PETRI_PLACES=360, PETRI_TRANSITIONS=555} [2024-06-27 20:10:46,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-27 20:10:46,193 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 555 transitions, 6552 flow [2024-06-27 20:10:46,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:46,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:46,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:46,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:10:46,193 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:46,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:46,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1386009109, now seen corresponding path program 1 times [2024-06-27 20:10:46,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:46,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664616159] [2024-06-27 20:10:46,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:46,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:46,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:46,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664616159] [2024-06-27 20:10:46,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664616159] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:46,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:46,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:46,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939630791] [2024-06-27 20:10:46,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:46,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:46,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:46,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:46,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:46,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:46,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 555 transitions, 6552 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-27 20:10:46,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:46,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:46,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:48,395 INFO L124 PetriNetUnfolderBase]: 4321/6467 cut-off events. [2024-06-27 20:10:48,395 INFO L125 PetriNetUnfolderBase]: For 1242404/1242433 co-relation queries the response was YES. [2024-06-27 20:10:48,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60671 conditions, 6467 events. 4321/6467 cut-off events. For 1242404/1242433 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 35135 event pairs, 869 based on Foata normal form. 32/6497 useless extension candidates. Maximal degree in co-relation 60494. Up to 5552 conditions per place. [2024-06-27 20:10:48,484 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 468 selfloop transitions, 222 changer transitions 0/693 dead transitions. [2024-06-27 20:10:48,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 693 transitions, 9506 flow [2024-06-27 20:10:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:10:48,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:10:48,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:10:48,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 20:10:48,485 INFO L175 Difference]: Start difference. First operand has 360 places, 555 transitions, 6552 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:10:48,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 693 transitions, 9506 flow [2024-06-27 20:10:50,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 693 transitions, 9376 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 20:10:50,768 INFO L231 Difference]: Finished difference. Result has 371 places, 636 transitions, 8035 flow [2024-06-27 20:10:50,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6434, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8035, PETRI_PLACES=371, PETRI_TRANSITIONS=636} [2024-06-27 20:10:50,768 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-27 20:10:50,768 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 636 transitions, 8035 flow [2024-06-27 20:10:50,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-27 20:10:50,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:50,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:50,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:10:50,769 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:50,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:50,769 INFO L85 PathProgramCache]: Analyzing trace with hash 2080543087, now seen corresponding path program 2 times [2024-06-27 20:10:50,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:50,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566614909] [2024-06-27 20:10:50,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:50,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:50,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:51,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:51,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566614909] [2024-06-27 20:10:51,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566614909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:51,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:51,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:10:51,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065427146] [2024-06-27 20:10:51,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:51,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:10:51,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:51,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:10:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:10:51,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:51,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 636 transitions, 8035 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:51,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:51,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:51,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:10:53,804 INFO L124 PetriNetUnfolderBase]: 5084/7593 cut-off events. [2024-06-27 20:10:53,805 INFO L125 PetriNetUnfolderBase]: For 1486728/1486755 co-relation queries the response was YES. [2024-06-27 20:10:53,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73636 conditions, 7593 events. 5084/7593 cut-off events. For 1486728/1486755 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 42374 event pairs, 1160 based on Foata normal form. 30/7621 useless extension candidates. Maximal degree in co-relation 73454. Up to 6290 conditions per place. [2024-06-27 20:10:53,914 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 601 selfloop transitions, 257 changer transitions 0/861 dead transitions. [2024-06-27 20:10:53,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 861 transitions, 12439 flow [2024-06-27 20:10:53,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:10:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:10:53,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-27 20:10:53,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722838137472284 [2024-06-27 20:10:53,915 INFO L175 Difference]: Start difference. First operand has 371 places, 636 transitions, 8035 flow. Second operand 11 states and 213 transitions. [2024-06-27 20:10:53,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 861 transitions, 12439 flow [2024-06-27 20:10:57,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 861 transitions, 12198 flow, removed 109 selfloop flow, removed 2 redundant places. [2024-06-27 20:10:57,253 INFO L231 Difference]: Finished difference. Result has 387 places, 798 transitions, 10771 flow [2024-06-27 20:10:57,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7902, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10771, PETRI_PLACES=387, PETRI_TRANSITIONS=798} [2024-06-27 20:10:57,253 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-27 20:10:57,254 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 798 transitions, 10771 flow [2024-06-27 20:10:57,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:10:57,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:10:57,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:10:57,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:10:57,254 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:10:57,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:10:57,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1834387817, now seen corresponding path program 3 times [2024-06-27 20:10:57,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:10:57,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253063916] [2024-06-27 20:10:57,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:10:57,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:10:57,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:10:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:10:57,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:10:57,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253063916] [2024-06-27 20:10:57,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253063916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:10:57,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:10:57,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:10:57,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543364813] [2024-06-27 20:10:57,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:10:57,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:10:57,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:10:57,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:10:57,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:10:57,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:10:57,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 798 transitions, 10771 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-27 20:10:57,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:10:57,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:10:57,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:00,086 INFO L124 PetriNetUnfolderBase]: 5239/7833 cut-off events. [2024-06-27 20:11:00,086 INFO L125 PetriNetUnfolderBase]: For 1535521/1535552 co-relation queries the response was YES. [2024-06-27 20:11:00,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78600 conditions, 7833 events. 5239/7833 cut-off events. For 1535521/1535552 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 43930 event pairs, 994 based on Foata normal form. 34/7865 useless extension candidates. Maximal degree in co-relation 78409. Up to 6238 conditions per place. [2024-06-27 20:11:00,205 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 534 selfloop transitions, 337 changer transitions 0/874 dead transitions. [2024-06-27 20:11:00,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 874 transitions, 13730 flow [2024-06-27 20:11:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:11:00,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:11:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-27 20:11:00,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44146341463414634 [2024-06-27 20:11:00,206 INFO L175 Difference]: Start difference. First operand has 387 places, 798 transitions, 10771 flow. Second operand 10 states and 181 transitions. [2024-06-27 20:11:00,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 874 transitions, 13730 flow [2024-06-27 20:11:03,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 874 transitions, 13590 flow, removed 69 selfloop flow, removed 1 redundant places. [2024-06-27 20:11:03,728 INFO L231 Difference]: Finished difference. Result has 399 places, 828 transitions, 11976 flow [2024-06-27 20:11:03,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10697, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11976, PETRI_PLACES=399, PETRI_TRANSITIONS=828} [2024-06-27 20:11:03,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-27 20:11:03,729 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 828 transitions, 11976 flow [2024-06-27 20:11:03,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-27 20:11:03,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:03,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:03,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:11:03,729 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:03,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1880510910, now seen corresponding path program 1 times [2024-06-27 20:11:03,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:03,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032602838] [2024-06-27 20:11:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:04,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:04,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:04,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032602838] [2024-06-27 20:11:04,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032602838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:04,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:04,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:04,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240593488] [2024-06-27 20:11:04,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:04,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:04,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:04,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:04,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:04,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:04,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 828 transitions, 11976 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-27 20:11:04,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:04,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:04,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:06,867 INFO L124 PetriNetUnfolderBase]: 5335/7967 cut-off events. [2024-06-27 20:11:06,868 INFO L125 PetriNetUnfolderBase]: For 1583747/1583778 co-relation queries the response was YES. [2024-06-27 20:11:06,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81876 conditions, 7967 events. 5335/7967 cut-off events. For 1583747/1583778 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 44799 event pairs, 1181 based on Foata normal form. 34/7999 useless extension candidates. Maximal degree in co-relation 81679. Up to 6090 conditions per place. [2024-06-27 20:11:07,002 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 468 selfloop transitions, 423 changer transitions 0/894 dead transitions. [2024-06-27 20:11:07,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 894 transitions, 14902 flow [2024-06-27 20:11:07,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:11:07,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:11:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 20:11:07,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-27 20:11:07,003 INFO L175 Difference]: Start difference. First operand has 399 places, 828 transitions, 11976 flow. Second operand 10 states and 189 transitions. [2024-06-27 20:11:07,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 894 transitions, 14902 flow [2024-06-27 20:11:12,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 894 transitions, 14401 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-27 20:11:12,020 INFO L231 Difference]: Finished difference. Result has 406 places, 857 transitions, 12869 flow [2024-06-27 20:11:12,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11475, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=398, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12869, PETRI_PLACES=406, PETRI_TRANSITIONS=857} [2024-06-27 20:11:12,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-27 20:11:12,021 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 857 transitions, 12869 flow [2024-06-27 20:11:12,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-27 20:11:12,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:12,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:12,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:11:12,021 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:12,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:12,021 INFO L85 PathProgramCache]: Analyzing trace with hash -365862943, now seen corresponding path program 4 times [2024-06-27 20:11:12,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:12,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111833813] [2024-06-27 20:11:12,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:12,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:12,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:12,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:12,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111833813] [2024-06-27 20:11:12,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111833813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:12,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:12,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:12,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754003229] [2024-06-27 20:11:12,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:12,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:12,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:12,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:12,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:12,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:12,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 857 transitions, 12869 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-27 20:11:12,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:12,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:12,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:14,929 INFO L124 PetriNetUnfolderBase]: 5367/8015 cut-off events. [2024-06-27 20:11:14,929 INFO L125 PetriNetUnfolderBase]: For 1639278/1639313 co-relation queries the response was YES. [2024-06-27 20:11:15,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84028 conditions, 8015 events. 5367/8015 cut-off events. For 1639278/1639313 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 45131 event pairs, 1195 based on Foata normal form. 42/8055 useless extension candidates. Maximal degree in co-relation 83828. Up to 7032 conditions per place. [2024-06-27 20:11:15,064 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 626 selfloop transitions, 275 changer transitions 0/904 dead transitions. [2024-06-27 20:11:15,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 904 transitions, 15283 flow [2024-06-27 20:11:15,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:11:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:11:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 20:11:15,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43414634146341463 [2024-06-27 20:11:15,065 INFO L175 Difference]: Start difference. First operand has 406 places, 857 transitions, 12869 flow. Second operand 10 states and 178 transitions. [2024-06-27 20:11:15,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 904 transitions, 15283 flow [2024-06-27 20:11:19,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 904 transitions, 15128 flow, removed 59 selfloop flow, removed 2 redundant places. [2024-06-27 20:11:19,742 INFO L231 Difference]: Finished difference. Result has 414 places, 863 transitions, 13405 flow [2024-06-27 20:11:19,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12714, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13405, PETRI_PLACES=414, PETRI_TRANSITIONS=863} [2024-06-27 20:11:19,743 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-27 20:11:19,743 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 863 transitions, 13405 flow [2024-06-27 20:11:19,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-27 20:11:19,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:19,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:19,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:11:19,743 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:19,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:19,744 INFO L85 PathProgramCache]: Analyzing trace with hash -365872243, now seen corresponding path program 5 times [2024-06-27 20:11:19,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:19,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261009058] [2024-06-27 20:11:19,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:19,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:19,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:20,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:20,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:20,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261009058] [2024-06-27 20:11:20,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261009058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:20,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:20,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:20,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854354066] [2024-06-27 20:11:20,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:20,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:20,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:20,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:20,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 863 transitions, 13405 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-27 20:11:20,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:20,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:20,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:22,605 INFO L124 PetriNetUnfolderBase]: 5347/7987 cut-off events. [2024-06-27 20:11:22,606 INFO L125 PetriNetUnfolderBase]: For 1613754/1613789 co-relation queries the response was YES. [2024-06-27 20:11:22,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83669 conditions, 7987 events. 5347/7987 cut-off events. For 1613754/1613789 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 45030 event pairs, 1177 based on Foata normal form. 42/8027 useless extension candidates. Maximal degree in co-relation 83467. Up to 6948 conditions per place. [2024-06-27 20:11:22,742 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 619 selfloop transitions, 284 changer transitions 0/906 dead transitions. [2024-06-27 20:11:22,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 906 transitions, 15715 flow [2024-06-27 20:11:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:11:22,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:11:22,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 20:11:22,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43658536585365854 [2024-06-27 20:11:22,743 INFO L175 Difference]: Start difference. First operand has 414 places, 863 transitions, 13405 flow. Second operand 10 states and 179 transitions. [2024-06-27 20:11:22,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 906 transitions, 15715 flow [2024-06-27 20:11:26,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 906 transitions, 15073 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-27 20:11:26,636 INFO L231 Difference]: Finished difference. Result has 419 places, 864 transitions, 13364 flow [2024-06-27 20:11:26,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12763, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=863, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13364, PETRI_PLACES=419, PETRI_TRANSITIONS=864} [2024-06-27 20:11:26,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-27 20:11:26,637 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 864 transitions, 13364 flow [2024-06-27 20:11:26,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 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) [2024-06-27 20:11:26,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:26,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:26,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:11:26,637 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:26,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:26,637 INFO L85 PathProgramCache]: Analyzing trace with hash 98234331, now seen corresponding path program 1 times [2024-06-27 20:11:26,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:26,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109919359] [2024-06-27 20:11:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:26,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:26,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:27,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:27,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109919359] [2024-06-27 20:11:27,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109919359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:27,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:27,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:27,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772090537] [2024-06-27 20:11:27,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:27,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:27,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:27,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:27,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:27,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:27,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 864 transitions, 13364 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:27,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:27,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:27,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:29,541 INFO L124 PetriNetUnfolderBase]: 5515/8238 cut-off events. [2024-06-27 20:11:29,541 INFO L125 PetriNetUnfolderBase]: For 1598322/1598349 co-relation queries the response was YES. [2024-06-27 20:11:29,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85923 conditions, 8238 events. 5515/8238 cut-off events. For 1598322/1598349 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 46611 event pairs, 1238 based on Foata normal form. 28/8263 useless extension candidates. Maximal degree in co-relation 85719. Up to 7790 conditions per place. [2024-06-27 20:11:29,683 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 857 selfloop transitions, 78 changer transitions 0/938 dead transitions. [2024-06-27 20:11:29,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 938 transitions, 16073 flow [2024-06-27 20:11:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:29,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:11:29,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:11:29,684 INFO L175 Difference]: Start difference. First operand has 419 places, 864 transitions, 13364 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:11:29,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 938 transitions, 16073 flow [2024-06-27 20:11:33,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 938 transitions, 15499 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 20:11:33,465 INFO L231 Difference]: Finished difference. Result has 423 places, 903 transitions, 13711 flow [2024-06-27 20:11:33,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12794, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=864, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=804, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13711, PETRI_PLACES=423, PETRI_TRANSITIONS=903} [2024-06-27 20:11:33,466 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-27 20:11:33,466 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 903 transitions, 13711 flow [2024-06-27 20:11:33,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:33,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:33,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:33,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:11:33,466 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:33,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:33,467 INFO L85 PathProgramCache]: Analyzing trace with hash -381694029, now seen corresponding path program 2 times [2024-06-27 20:11:33,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:33,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65020636] [2024-06-27 20:11:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:33,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:34,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:34,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65020636] [2024-06-27 20:11:34,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65020636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:34,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:34,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:34,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591464671] [2024-06-27 20:11:34,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:34,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:34,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:34,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:34,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:34,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:34,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 903 transitions, 13711 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:34,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:34,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:34,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:36,854 INFO L124 PetriNetUnfolderBase]: 5663/8444 cut-off events. [2024-06-27 20:11:36,855 INFO L125 PetriNetUnfolderBase]: For 1667308/1667341 co-relation queries the response was YES. [2024-06-27 20:11:36,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88155 conditions, 8444 events. 5663/8444 cut-off events. For 1667308/1667341 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 47944 event pairs, 1237 based on Foata normal form. 34/8475 useless extension candidates. Maximal degree in co-relation 87948. Up to 7620 conditions per place. [2024-06-27 20:11:36,986 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 838 selfloop transitions, 165 changer transitions 0/1006 dead transitions. [2024-06-27 20:11:36,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 1006 transitions, 17514 flow [2024-06-27 20:11:36,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:36,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:11:36,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-27 20:11:36,987 INFO L175 Difference]: Start difference. First operand has 423 places, 903 transitions, 13711 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:11:36,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 1006 transitions, 17514 flow [2024-06-27 20:11:41,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 1006 transitions, 17449 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 20:11:41,111 INFO L231 Difference]: Finished difference. Result has 432 places, 958 transitions, 14768 flow [2024-06-27 20:11:41,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13646, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=759, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14768, PETRI_PLACES=432, PETRI_TRANSITIONS=958} [2024-06-27 20:11:41,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-27 20:11:41,111 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 958 transitions, 14768 flow [2024-06-27 20:11:41,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:41,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:41,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:41,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:11:41,112 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:41,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:41,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1277165573, now seen corresponding path program 3 times [2024-06-27 20:11:41,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:41,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155920623] [2024-06-27 20:11:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:41,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:41,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:41,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155920623] [2024-06-27 20:11:41,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155920623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:41,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:41,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:41,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279725353] [2024-06-27 20:11:41,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:41,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:41,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:41,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:41,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:41,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:41,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 958 transitions, 14768 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:41,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:41,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:41,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:44,665 INFO L124 PetriNetUnfolderBase]: 5805/8649 cut-off events. [2024-06-27 20:11:44,665 INFO L125 PetriNetUnfolderBase]: For 1729267/1729318 co-relation queries the response was YES. [2024-06-27 20:11:44,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92126 conditions, 8649 events. 5805/8649 cut-off events. For 1729267/1729318 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 49093 event pairs, 1201 based on Foata normal form. 52/8698 useless extension candidates. Maximal degree in co-relation 91915. Up to 8091 conditions per place. [2024-06-27 20:11:44,918 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 922 selfloop transitions, 102 changer transitions 0/1027 dead transitions. [2024-06-27 20:11:44,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1027 transitions, 18060 flow [2024-06-27 20:11:44,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:11:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:11:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 188 transitions. [2024-06-27 20:11:44,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41685144124168516 [2024-06-27 20:11:44,919 INFO L175 Difference]: Start difference. First operand has 432 places, 958 transitions, 14768 flow. Second operand 11 states and 188 transitions. [2024-06-27 20:11:44,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1027 transitions, 18060 flow [2024-06-27 20:11:49,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 1027 transitions, 17965 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-27 20:11:49,595 INFO L231 Difference]: Finished difference. Result has 444 places, 987 transitions, 15493 flow [2024-06-27 20:11:49,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14685, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=958, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=867, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15493, PETRI_PLACES=444, PETRI_TRANSITIONS=987} [2024-06-27 20:11:49,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-27 20:11:49,595 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 987 transitions, 15493 flow [2024-06-27 20:11:49,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:49,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:49,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:49,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:11:49,595 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:49,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:49,596 INFO L85 PathProgramCache]: Analyzing trace with hash -376153089, now seen corresponding path program 4 times [2024-06-27 20:11:49,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:49,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140668093] [2024-06-27 20:11:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:49,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:50,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:50,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140668093] [2024-06-27 20:11:50,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140668093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:50,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:50,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:11:50,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874597863] [2024-06-27 20:11:50,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:50,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:11:50,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:50,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:11:50,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:11:50,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:50,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 987 transitions, 15493 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:50,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:50,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:50,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:11:53,113 INFO L124 PetriNetUnfolderBase]: 5799/8641 cut-off events. [2024-06-27 20:11:53,113 INFO L125 PetriNetUnfolderBase]: For 1745128/1745179 co-relation queries the response was YES. [2024-06-27 20:11:53,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92592 conditions, 8641 events. 5799/8641 cut-off events. For 1745128/1745179 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 49057 event pairs, 1206 based on Foata normal form. 52/8690 useless extension candidates. Maximal degree in co-relation 92376. Up to 8086 conditions per place. [2024-06-27 20:11:53,251 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 916 selfloop transitions, 100 changer transitions 0/1019 dead transitions. [2024-06-27 20:11:53,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1019 transitions, 17957 flow [2024-06-27 20:11:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:11:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:11:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 20:11:53,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-27 20:11:53,252 INFO L175 Difference]: Start difference. First operand has 444 places, 987 transitions, 15493 flow. Second operand 9 states and 158 transitions. [2024-06-27 20:11:53,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1019 transitions, 17957 flow [2024-06-27 20:11:57,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 1019 transitions, 17758 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 20:11:57,399 INFO L231 Difference]: Finished difference. Result has 449 places, 987 transitions, 15501 flow [2024-06-27 20:11:57,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15294, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=887, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15501, PETRI_PLACES=449, PETRI_TRANSITIONS=987} [2024-06-27 20:11:57,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-27 20:11:57,399 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 987 transitions, 15501 flow [2024-06-27 20:11:57,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:57,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:11:57,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:11:57,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:11:57,408 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:11:57,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:11:57,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1654912401, now seen corresponding path program 1 times [2024-06-27 20:11:57,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:11:57,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546112686] [2024-06-27 20:11:57,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:11:57,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:11:57,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:11:58,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:11:58,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:11:58,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546112686] [2024-06-27 20:11:58,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546112686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:11:58,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:11:58,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:11:58,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903565610] [2024-06-27 20:11:58,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:11:58,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:11:58,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:11:58,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:11:58,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:11:58,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:11:58,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 987 transitions, 15501 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:11:58,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:11:58,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:11:58,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:01,384 INFO L124 PetriNetUnfolderBase]: 5907/8795 cut-off events. [2024-06-27 20:12:01,384 INFO L125 PetriNetUnfolderBase]: For 1849785/1849836 co-relation queries the response was YES. [2024-06-27 20:12:01,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94226 conditions, 8795 events. 5907/8795 cut-off events. For 1849785/1849836 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 50001 event pairs, 1236 based on Foata normal form. 62/8854 useless extension candidates. Maximal degree in co-relation 94009. Up to 8217 conditions per place. [2024-06-27 20:12:01,525 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 938 selfloop transitions, 95 changer transitions 0/1036 dead transitions. [2024-06-27 20:12:01,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 1036 transitions, 18067 flow [2024-06-27 20:12:01,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:01,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:01,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 20:12:01,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-27 20:12:01,526 INFO L175 Difference]: Start difference. First operand has 449 places, 987 transitions, 15501 flow. Second operand 10 states and 176 transitions. [2024-06-27 20:12:01,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 1036 transitions, 18067 flow [2024-06-27 20:12:06,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 1036 transitions, 17894 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:12:06,440 INFO L231 Difference]: Finished difference. Result has 454 places, 1000 transitions, 15836 flow [2024-06-27 20:12:06,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15343, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=987, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=896, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15836, PETRI_PLACES=454, PETRI_TRANSITIONS=1000} [2024-06-27 20:12:06,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-27 20:12:06,441 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 1000 transitions, 15836 flow [2024-06-27 20:12:06,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:06,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:06,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:06,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:12:06,442 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:06,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:06,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1457514321, now seen corresponding path program 5 times [2024-06-27 20:12:06,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:06,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240548846] [2024-06-27 20:12:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:06,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:06,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:07,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:07,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:07,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240548846] [2024-06-27 20:12:07,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240548846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:07,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:07,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:12:07,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626464879] [2024-06-27 20:12:07,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:07,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:12:07,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:07,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:12:07,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:12:07,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:07,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 1000 transitions, 15836 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:07,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:07,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:07,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:10,168 INFO L124 PetriNetUnfolderBase]: 5917/8810 cut-off events. [2024-06-27 20:12:10,168 INFO L125 PetriNetUnfolderBase]: For 1807418/1807469 co-relation queries the response was YES. [2024-06-27 20:12:10,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95124 conditions, 8810 events. 5917/8810 cut-off events. For 1807418/1807469 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 50093 event pairs, 1261 based on Foata normal form. 52/8859 useless extension candidates. Maximal degree in co-relation 94904. Up to 7832 conditions per place. [2024-06-27 20:12:10,308 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 842 selfloop transitions, 201 changer transitions 0/1046 dead transitions. [2024-06-27 20:12:10,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 1046 transitions, 18978 flow [2024-06-27 20:12:10,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:10,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:10,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:12:10,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-27 20:12:10,310 INFO L175 Difference]: Start difference. First operand has 454 places, 1000 transitions, 15836 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:12:10,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 1046 transitions, 18978 flow [2024-06-27 20:12:15,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1046 transitions, 18781 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 20:12:15,200 INFO L231 Difference]: Finished difference. Result has 459 places, 1003 transitions, 16112 flow [2024-06-27 20:12:15,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15639, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1000, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=802, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16112, PETRI_PLACES=459, PETRI_TRANSITIONS=1003} [2024-06-27 20:12:15,204 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-27 20:12:15,204 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 1003 transitions, 16112 flow [2024-06-27 20:12:15,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:15,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:15,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:15,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:12:15,206 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:15,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash 98562063, now seen corresponding path program 2 times [2024-06-27 20:12:15,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:15,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632035765] [2024-06-27 20:12:15,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:15,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:15,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:15,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632035765] [2024-06-27 20:12:15,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632035765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:15,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:15,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:15,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748962027] [2024-06-27 20:12:15,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:15,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:15,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:15,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:15,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:15,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:15,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 1003 transitions, 16112 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:15,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:15,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:15,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:19,232 INFO L124 PetriNetUnfolderBase]: 6315/9359 cut-off events. [2024-06-27 20:12:19,233 INFO L125 PetriNetUnfolderBase]: For 2202637/2202688 co-relation queries the response was YES. [2024-06-27 20:12:19,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104683 conditions, 9359 events. 6315/9359 cut-off events. For 2202637/2202688 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 53371 event pairs, 1357 based on Foata normal form. 62/9418 useless extension candidates. Maximal degree in co-relation 104462. Up to 7316 conditions per place. [2024-06-27 20:12:19,383 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 880 selfloop transitions, 225 changer transitions 0/1108 dead transitions. [2024-06-27 20:12:19,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 1108 transitions, 20458 flow [2024-06-27 20:12:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:19,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:19,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2024-06-27 20:12:19,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-27 20:12:19,384 INFO L175 Difference]: Start difference. First operand has 459 places, 1003 transitions, 16112 flow. Second operand 10 states and 198 transitions. [2024-06-27 20:12:19,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 1108 transitions, 20458 flow [2024-06-27 20:12:24,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 1108 transitions, 20072 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:24,991 INFO L231 Difference]: Finished difference. Result has 469 places, 1041 transitions, 17152 flow [2024-06-27 20:12:24,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15731, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1003, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=797, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17152, PETRI_PLACES=469, PETRI_TRANSITIONS=1041} [2024-06-27 20:12:24,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-27 20:12:24,992 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 1041 transitions, 17152 flow [2024-06-27 20:12:24,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:24,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:24,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:24,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:12:24,992 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:24,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:24,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1021293107, now seen corresponding path program 6 times [2024-06-27 20:12:24,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:24,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041422409] [2024-06-27 20:12:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:24,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:25,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:25,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041422409] [2024-06-27 20:12:25,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041422409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:25,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:25,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:12:25,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772620114] [2024-06-27 20:12:25,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:25,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:12:25,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:25,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:12:25,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:12:25,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:25,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 1041 transitions, 17152 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:25,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:25,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:25,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:29,066 INFO L124 PetriNetUnfolderBase]: 6341/9396 cut-off events. [2024-06-27 20:12:29,067 INFO L125 PetriNetUnfolderBase]: For 2191427/2191478 co-relation queries the response was YES. [2024-06-27 20:12:29,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108811 conditions, 9396 events. 6341/9396 cut-off events. For 2191427/2191478 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 53480 event pairs, 1297 based on Foata normal form. 52/9445 useless extension candidates. Maximal degree in co-relation 108583. Up to 8395 conditions per place. [2024-06-27 20:12:29,231 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 880 selfloop transitions, 207 changer transitions 0/1090 dead transitions. [2024-06-27 20:12:29,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 1090 transitions, 20499 flow [2024-06-27 20:12:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:12:29,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:12:29,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:12:29,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-27 20:12:29,232 INFO L175 Difference]: Start difference. First operand has 469 places, 1041 transitions, 17152 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:12:29,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 1090 transitions, 20499 flow [2024-06-27 20:12:35,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 1090 transitions, 20309 flow, removed 94 selfloop flow, removed 1 redundant places. [2024-06-27 20:12:35,090 INFO L231 Difference]: Finished difference. Result has 477 places, 1047 transitions, 17539 flow [2024-06-27 20:12:35,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16962, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1041, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17539, PETRI_PLACES=477, PETRI_TRANSITIONS=1047} [2024-06-27 20:12:35,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 435 predicate places. [2024-06-27 20:12:35,091 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1047 transitions, 17539 flow [2024-06-27 20:12:35,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:35,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:35,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:35,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:12:35,091 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:35,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:35,092 INFO L85 PathProgramCache]: Analyzing trace with hash -372428067, now seen corresponding path program 3 times [2024-06-27 20:12:35,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:35,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543093078] [2024-06-27 20:12:35,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:35,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:35,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:35,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:35,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543093078] [2024-06-27 20:12:35,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543093078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:35,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:35,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:35,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653922889] [2024-06-27 20:12:35,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:35,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:35,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:35,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:35,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:35,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:35,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1047 transitions, 17539 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:35,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:35,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:35,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:39,269 INFO L124 PetriNetUnfolderBase]: 6305/9347 cut-off events. [2024-06-27 20:12:39,269 INFO L125 PetriNetUnfolderBase]: For 2205700/2205751 co-relation queries the response was YES. [2024-06-27 20:12:39,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106909 conditions, 9347 events. 6305/9347 cut-off events. For 2205700/2205751 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 53268 event pairs, 1359 based on Foata normal form. 62/9406 useless extension candidates. Maximal degree in co-relation 106678. Up to 7315 conditions per place. [2024-06-27 20:12:39,426 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 878 selfloop transitions, 230 changer transitions 0/1111 dead transitions. [2024-06-27 20:12:39,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 486 places, 1111 transitions, 21053 flow [2024-06-27 20:12:39,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:39,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:12:39,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47317073170731705 [2024-06-27 20:12:39,427 INFO L175 Difference]: Start difference. First operand has 477 places, 1047 transitions, 17539 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:12:39,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 486 places, 1111 transitions, 21053 flow [2024-06-27 20:12:45,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 1111 transitions, 20657 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 20:12:45,124 INFO L231 Difference]: Finished difference. Result has 482 places, 1047 transitions, 17611 flow [2024-06-27 20:12:45,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17143, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=817, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17611, PETRI_PLACES=482, PETRI_TRANSITIONS=1047} [2024-06-27 20:12:45,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-27 20:12:45,125 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 1047 transitions, 17611 flow [2024-06-27 20:12:45,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:45,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:45,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:45,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:12:45,125 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:45,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:45,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1706148033, now seen corresponding path program 4 times [2024-06-27 20:12:45,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:45,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228760978] [2024-06-27 20:12:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:45,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:45,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:45,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:45,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228760978] [2024-06-27 20:12:45,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228760978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:45,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:45,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:45,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072963490] [2024-06-27 20:12:45,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:45,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:45,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:45,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:45,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:45,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:45,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 1047 transitions, 17611 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:45,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:45,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:45,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:12:49,408 INFO L124 PetriNetUnfolderBase]: 6461/9564 cut-off events. [2024-06-27 20:12:49,408 INFO L125 PetriNetUnfolderBase]: For 2340376/2340427 co-relation queries the response was YES. [2024-06-27 20:12:49,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110982 conditions, 9564 events. 6461/9564 cut-off events. For 2340376/2340427 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 54522 event pairs, 1265 based on Foata normal form. 62/9623 useless extension candidates. Maximal degree in co-relation 110750. Up to 7395 conditions per place. [2024-06-27 20:12:49,578 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 876 selfloop transitions, 238 changer transitions 0/1117 dead transitions. [2024-06-27 20:12:49,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 1117 transitions, 21581 flow [2024-06-27 20:12:49,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:12:49,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:12:49,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:12:49,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-27 20:12:49,579 INFO L175 Difference]: Start difference. First operand has 482 places, 1047 transitions, 17611 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:12:49,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 1117 transitions, 21581 flow [2024-06-27 20:12:56,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 1117 transitions, 21139 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:12:56,396 INFO L231 Difference]: Finished difference. Result has 486 places, 1055 transitions, 17855 flow [2024-06-27 20:12:56,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17185, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1047, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=817, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17855, PETRI_PLACES=486, PETRI_TRANSITIONS=1055} [2024-06-27 20:12:56,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-27 20:12:56,397 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 1055 transitions, 17855 flow [2024-06-27 20:12:56,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:56,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:12:56,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:12:56,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:12:56,397 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:12:56,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:12:56,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1641337199, now seen corresponding path program 5 times [2024-06-27 20:12:56,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:12:56,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828309413] [2024-06-27 20:12:56,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:12:56,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:12:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:12:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:12:57,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:12:57,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828309413] [2024-06-27 20:12:57,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828309413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:12:57,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:12:57,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:12:57,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689884837] [2024-06-27 20:12:57,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:12:57,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:12:57,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:12:57,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:12:57,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:12:57,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:12:57,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 1055 transitions, 17855 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:12:57,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:12:57,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:12:57,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:00,636 INFO L124 PetriNetUnfolderBase]: 6425/9516 cut-off events. [2024-06-27 20:13:00,636 INFO L125 PetriNetUnfolderBase]: For 2277668/2277719 co-relation queries the response was YES. [2024-06-27 20:13:00,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109318 conditions, 9516 events. 6425/9516 cut-off events. For 2277668/2277719 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 54219 event pairs, 1249 based on Foata normal form. 62/9575 useless extension candidates. Maximal degree in co-relation 109085. Up to 7379 conditions per place. [2024-06-27 20:13:00,941 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 870 selfloop transitions, 240 changer transitions 0/1113 dead transitions. [2024-06-27 20:13:00,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 1113 transitions, 21325 flow [2024-06-27 20:13:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:13:00,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-27 20:13:00,942 INFO L175 Difference]: Start difference. First operand has 486 places, 1055 transitions, 17855 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:13:00,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 1113 transitions, 21325 flow [2024-06-27 20:13:06,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 1113 transitions, 20808 flow, removed 76 selfloop flow, removed 6 redundant places. [2024-06-27 20:13:06,840 INFO L231 Difference]: Finished difference. Result has 490 places, 1055 transitions, 17825 flow [2024-06-27 20:13:06,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17338, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=815, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17825, PETRI_PLACES=490, PETRI_TRANSITIONS=1055} [2024-06-27 20:13:06,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-27 20:13:06,841 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 1055 transitions, 17825 flow [2024-06-27 20:13:06,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:06,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:06,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:06,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:13:06,841 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:06,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:06,841 INFO L85 PathProgramCache]: Analyzing trace with hash 21331261, now seen corresponding path program 6 times [2024-06-27 20:13:06,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:06,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090701999] [2024-06-27 20:13:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:06,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:06,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:07,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:07,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:07,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090701999] [2024-06-27 20:13:07,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090701999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:07,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:07,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:13:07,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878137453] [2024-06-27 20:13:07,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:07,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:13:07,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:07,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:13:07,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:13:07,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:07,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 1055 transitions, 17825 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:07,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:07,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:07,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:13:10,950 INFO L124 PetriNetUnfolderBase]: 6389/9468 cut-off events. [2024-06-27 20:13:10,950 INFO L125 PetriNetUnfolderBase]: For 2206676/2206727 co-relation queries the response was YES. [2024-06-27 20:13:11,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106912 conditions, 9468 events. 6389/9468 cut-off events. For 2206676/2206727 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 53971 event pairs, 1231 based on Foata normal form. 62/9527 useless extension candidates. Maximal degree in co-relation 106678. Up to 7363 conditions per place. [2024-06-27 20:13:11,134 INFO L140 encePairwiseOnDemand]: 25/41 looper letters, 852 selfloop transitions, 256 changer transitions 0/1111 dead transitions. [2024-06-27 20:13:11,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 1111 transitions, 21273 flow [2024-06-27 20:13:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:13:11,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:13:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:13:11,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-27 20:13:11,135 INFO L175 Difference]: Start difference. First operand has 490 places, 1055 transitions, 17825 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:13:11,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 1111 transitions, 21273 flow [2024-06-27 20:13:17,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 1111 transitions, 20780 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:13:17,830 INFO L231 Difference]: Finished difference. Result has 494 places, 1055 transitions, 17852 flow [2024-06-27 20:13:17,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17332, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17852, PETRI_PLACES=494, PETRI_TRANSITIONS=1055} [2024-06-27 20:13:17,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-27 20:13:17,831 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 1055 transitions, 17852 flow [2024-06-27 20:13:17,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:17,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:13:17,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:13:17,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:13:17,832 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:13:17,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:13:17,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1034569393, now seen corresponding path program 6 times [2024-06-27 20:13:17,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:13:17,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821059392] [2024-06-27 20:13:17,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:13:17,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:13:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:13:18,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:13:18,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:13:18,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821059392] [2024-06-27 20:13:18,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821059392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:13:18,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:13:18,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:13:18,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105309706] [2024-06-27 20:13:18,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:13:18,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:13:18,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:13:18,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:13:18,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:13:18,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-27 20:13:18,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 1055 transitions, 17852 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:13:18,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:13:18,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-27 20:13:18,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand