./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe031_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.2024-05-21_14-57-05.files/protection/safe031_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe031_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe031_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-bcb38a6-m [2024-06-03 20:18:18,058 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:18:18,137 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:18:18,141 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:18:18,141 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:18:18,175 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:18:18,177 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:18:18,177 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:18:18,178 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:18:18,181 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:18:18,182 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:18:18,182 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:18:18,182 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:18:18,184 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:18:18,184 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:18:18,184 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:18:18,184 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:18:18,185 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:18:18,185 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:18:18,185 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:18:18,185 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:18:18,186 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:18:18,186 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:18:18,186 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:18:18,187 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:18:18,187 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:18:18,187 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:18:18,187 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:18:18,188 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:18:18,188 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:18:18,189 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:18:18,189 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:18:18,190 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:18:18,190 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:18:18,190 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:18:18,191 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:18:18,191 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:18:18,191 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:18:18,191 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:18:18,191 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:18:18,192 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:18:18,192 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:18:18,192 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:18:18,192 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:18:18,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:18:18,456 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:18:18,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:18:18,459 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:18:18,459 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:18:18,460 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe031_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 20:18:19,629 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:18:19,859 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:18:19,859 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe031_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 20:18:19,871 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/270c694b6/eb093fe978f249269c78045ce431f6ba/FLAGabfc96c4b [2024-06-03 20:18:19,882 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/270c694b6/eb093fe978f249269c78045ce431f6ba [2024-06-03 20:18:19,884 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:18:19,885 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:18:19,885 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe031_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-03 20:18:20,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:18:20,061 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:18:20,062 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:18:20,062 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:18:20,067 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:18:20,067 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:18:19" (1/2) ... [2024-06-03 20:18:20,068 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4de00821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:20, skipping insertion in model container [2024-06-03 20:18:20,068 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:18:19" (1/2) ... [2024-06-03 20:18:20,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@353e67c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:18:20, skipping insertion in model container [2024-06-03 20:18:20,070 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:18:20" (2/2) ... [2024-06-03 20:18:20,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4de00821 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20, skipping insertion in model container [2024-06-03 20:18:20,070 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:18:20" (2/2) ... [2024-06-03 20:18:20,071 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:18:20,157 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:18:20,158 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 20:18:20,159 INFO L97 edCorrectnessWitness]: Location invariant before [L832-L832] ((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 20:18:20,159 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] ((((((((((((((((! multithreaded || x$r_buff0_thd3 == (_Bool)0) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) [2024-06-03 20:18:20,159 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:18:20,159 INFO L106 edCorrectnessWitness]: ghost_update [L830-L830] multithreaded = 1; [2024-06-03 20:18:20,206 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:18:20,613 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:18:20,624 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:18:20,742 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:18:20,835 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:18:20,835 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20 WrapperNode [2024-06-03 20:18:20,835 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:18:20,837 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:18:20,837 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:18:20,837 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:18:20,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20" (1/1) ... [2024-06-03 20:18:20,875 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20" (1/1) ... [2024-06-03 20:18:20,905 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 124 [2024-06-03 20:18:20,906 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:18:20,907 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:18:20,907 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:18:20,907 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:18:20,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20" (1/1) ... [2024-06-03 20:18:20,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20" (1/1) ... [2024-06-03 20:18:20,926 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20" (1/1) ... [2024-06-03 20:18:20,948 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 20:18:20,948 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20" (1/1) ... [2024-06-03 20:18:20,948 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20" (1/1) ... [2024-06-03 20:18:20,959 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20" (1/1) ... [2024-06-03 20:18:20,961 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20" (1/1) ... [2024-06-03 20:18:20,963 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20" (1/1) ... [2024-06-03 20:18:20,978 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20" (1/1) ... [2024-06-03 20:18:20,981 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:18:20,982 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:18:20,982 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:18:20,983 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:18:20,983 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20" (1/1) ... [2024-06-03 20:18:20,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:18:21,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:18:21,026 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 20:18:21,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 20:18:21,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:18:21,077 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:18:21,077 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:18:21,077 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:18:21,077 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:18:21,078 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:18:21,078 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:18:21,078 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:18:21,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:18:21,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:18:21,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:18:21,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:18:21,081 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:18:21,228 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:18:21,230 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:18:21,578 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:18:21,579 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:18:21,777 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:18:21,778 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:18:21,779 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:18:21 BoogieIcfgContainer [2024-06-03 20:18:21,779 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:18:21,782 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:18:21,782 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:18:21,785 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:18:21,785 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:18:19" (1/4) ... [2024-06-03 20:18:21,786 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622b893f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:18:21, skipping insertion in model container [2024-06-03 20:18:21,786 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:18:20" (2/4) ... [2024-06-03 20:18:21,787 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622b893f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:18:21, skipping insertion in model container [2024-06-03 20:18:21,787 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:18:20" (3/4) ... [2024-06-03 20:18:21,788 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622b893f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:18:21, skipping insertion in model container [2024-06-03 20:18:21,788 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:18:21" (4/4) ... [2024-06-03 20:18:21,789 INFO L112 eAbstractionObserver]: Analyzing ICFG safe031_power.oepc_pso.oepc_rmo.oepc.i [2024-06-03 20:18:21,806 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:18:21,806 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:18:21,806 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:18:21,858 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:18:21,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:18:21,927 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 20:18:21,927 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:18:21,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 69 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:18:21,929 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:18:21,936 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 20:18:21,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:18:21,950 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;@6c09d551, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:18:21,950 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:18:21,957 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:18:21,958 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:18:21,958 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:18:21,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:21,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:18:21,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:21,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:21,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1673967918, now seen corresponding path program 1 times [2024-06-03 20:18:21,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:21,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224680666] [2024-06-03 20:18:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:21,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:22,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:23,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:23,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224680666] [2024-06-03 20:18:23,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224680666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:23,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:23,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:18:23,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393933995] [2024-06-03 20:18:23,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:23,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:18:23,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:23,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:18:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:18:23,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:18:23,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:23,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:23,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:18:23,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:23,602 INFO L124 PetriNetUnfolderBase]: 1359/2058 cut-off events. [2024-06-03 20:18:23,602 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-03 20:18:23,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4174 conditions, 2058 events. 1359/2058 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9772 event pairs, 941 based on Foata normal form. 1/2024 useless extension candidates. Maximal degree in co-relation 4159. Up to 2029 conditions per place. [2024-06-03 20:18:23,622 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 20:18:23,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-03 20:18:23,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:18:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:18:23,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-06-03 20:18:23,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 20:18:23,635 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 74 transitions. [2024-06-03 20:18:23,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-03 20:18:23,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:23,641 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 20:18:23,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-03 20:18:23,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 20:18:23,647 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 20:18:23,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:23,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:23,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:23,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:18:23,648 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:23,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:23,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1929611761, now seen corresponding path program 1 times [2024-06-03 20:18:23,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:23,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303298237] [2024-06-03 20:18:23,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:23,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:24,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:24,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303298237] [2024-06-03 20:18:24,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303298237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:24,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:24,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:18:24,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493685176] [2024-06-03 20:18:24,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:24,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:18:24,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:24,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:18:24,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:18:24,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:18:24,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:24,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:24,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:18:24,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:24,697 INFO L124 PetriNetUnfolderBase]: 1347/2040 cut-off events. [2024-06-03 20:18:24,697 INFO L125 PetriNetUnfolderBase]: For 413/413 co-relation queries the response was YES. [2024-06-03 20:18:24,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4683 conditions, 2040 events. 1347/2040 cut-off events. For 413/413 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9672 event pairs, 715 based on Foata normal form. 6/2045 useless extension candidates. Maximal degree in co-relation 4668. Up to 1981 conditions per place. [2024-06-03 20:18:24,710 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-03 20:18:24,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 54 transitions, 248 flow [2024-06-03 20:18:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:18:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:18:24,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-03 20:18:24,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:18:24,715 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 96 transitions. [2024-06-03 20:18:24,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 54 transitions, 248 flow [2024-06-03 20:18:24,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:18:24,718 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-03 20:18:24,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-03 20:18:24,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-03 20:18:24,719 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-03 20:18:24,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:24,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:24,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:24,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:18:24,723 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:24,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:24,726 INFO L85 PathProgramCache]: Analyzing trace with hash 267149839, now seen corresponding path program 1 times [2024-06-03 20:18:24,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:24,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414812721] [2024-06-03 20:18:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:24,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:25,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:25,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414812721] [2024-06-03 20:18:25,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414812721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:25,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:25,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:18:25,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627548102] [2024-06-03 20:18:25,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:25,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:18:25,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:25,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:18:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:18:25,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:25,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:25,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:25,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:25,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:25,988 INFO L124 PetriNetUnfolderBase]: 1342/2033 cut-off events. [2024-06-03 20:18:25,989 INFO L125 PetriNetUnfolderBase]: For 1070/1070 co-relation queries the response was YES. [2024-06-03 20:18:25,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5208 conditions, 2033 events. 1342/2033 cut-off events. For 1070/1070 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9581 event pairs, 822 based on Foata normal form. 2/2034 useless extension candidates. Maximal degree in co-relation 5191. Up to 1995 conditions per place. [2024-06-03 20:18:26,004 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2024-06-03 20:18:26,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 53 transitions, 274 flow [2024-06-03 20:18:26,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:18:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:18:26,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-03 20:18:26,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-03 20:18:26,007 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 97 transitions. [2024-06-03 20:18:26,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 53 transitions, 274 flow [2024-06-03 20:18:26,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 53 transitions, 260 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:26,010 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 166 flow [2024-06-03 20:18:26,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-03 20:18:26,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-03 20:18:26,011 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 166 flow [2024-06-03 20:18:26,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:26,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:26,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:26,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:18:26,012 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)] === [2024-06-03 20:18:26,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:26,012 INFO L85 PathProgramCache]: Analyzing trace with hash -737393617, now seen corresponding path program 1 times [2024-06-03 20:18:26,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:26,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25027883] [2024-06-03 20:18:26,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:26,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:27,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:27,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25027883] [2024-06-03 20:18:27,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25027883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:27,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:27,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:18:27,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029874896] [2024-06-03 20:18:27,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:27,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:18:27,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:27,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:18:27,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:18:27,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:18:27,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 166 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:27,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:27,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:18:27,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:27,636 INFO L124 PetriNetUnfolderBase]: 1333/2018 cut-off events. [2024-06-03 20:18:27,636 INFO L125 PetriNetUnfolderBase]: For 1936/1936 co-relation queries the response was YES. [2024-06-03 20:18:27,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5647 conditions, 2018 events. 1333/2018 cut-off events. For 1936/1936 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9659 event pairs, 467 based on Foata normal form. 6/2023 useless extension candidates. Maximal degree in co-relation 5628. Up to 1929 conditions per place. [2024-06-03 20:18:27,650 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 55 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-03 20:18:27,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 72 transitions, 384 flow [2024-06-03 20:18:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:27,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-03 20:18:27,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2024-06-03 20:18:27,653 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 166 flow. Second operand 6 states and 133 transitions. [2024-06-03 20:18:27,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 72 transitions, 384 flow [2024-06-03 20:18:27,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 366 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:27,656 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 207 flow [2024-06-03 20:18:27,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=207, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-03 20:18:27,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-03 20:18:27,657 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 207 flow [2024-06-03 20:18:27,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:27,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:27,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:27,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:18:27,658 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:27,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:27,658 INFO L85 PathProgramCache]: Analyzing trace with hash -308288290, now seen corresponding path program 1 times [2024-06-03 20:18:27,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:27,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157272898] [2024-06-03 20:18:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:27,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:27,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:28,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:28,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157272898] [2024-06-03 20:18:28,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157272898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:28,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:28,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:28,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665039677] [2024-06-03 20:18:28,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:28,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:28,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:28,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:28,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:28,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:28,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 207 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:28,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:28,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:28,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:28,826 INFO L124 PetriNetUnfolderBase]: 1335/2021 cut-off events. [2024-06-03 20:18:28,826 INFO L125 PetriNetUnfolderBase]: For 3078/3078 co-relation queries the response was YES. [2024-06-03 20:18:28,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6171 conditions, 2021 events. 1335/2021 cut-off events. For 3078/3078 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9563 event pairs, 569 based on Foata normal form. 3/2023 useless extension candidates. Maximal degree in co-relation 6151. Up to 1955 conditions per place. [2024-06-03 20:18:28,841 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-06-03 20:18:28,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 453 flow [2024-06-03 20:18:28,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-06-03 20:18:28,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-03 20:18:28,843 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 207 flow. Second operand 6 states and 119 transitions. [2024-06-03 20:18:28,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 453 flow [2024-06-03 20:18:28,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 424 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:28,848 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 299 flow [2024-06-03 20:18:28,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=299, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-06-03 20:18:28,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-03 20:18:28,849 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 299 flow [2024-06-03 20:18:28,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:28,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:28,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:28,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:18:28,850 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:28,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:28,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1452779772, now seen corresponding path program 1 times [2024-06-03 20:18:28,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:28,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268075109] [2024-06-03 20:18:28,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:28,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:29,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:29,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:29,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268075109] [2024-06-03 20:18:29,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268075109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:29,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:29,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:29,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209889049] [2024-06-03 20:18:29,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:29,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:29,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:29,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:29,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:29,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:29,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 299 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:29,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:29,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:29,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:30,111 INFO L124 PetriNetUnfolderBase]: 1357/2063 cut-off events. [2024-06-03 20:18:30,112 INFO L125 PetriNetUnfolderBase]: For 5026/5026 co-relation queries the response was YES. [2024-06-03 20:18:30,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7090 conditions, 2063 events. 1357/2063 cut-off events. For 5026/5026 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9705 event pairs, 556 based on Foata normal form. 4/2066 useless extension candidates. Maximal degree in co-relation 7066. Up to 1991 conditions per place. [2024-06-03 20:18:30,129 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 11 changer transitions 0/79 dead transitions. [2024-06-03 20:18:30,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 519 flow [2024-06-03 20:18:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-03 20:18:30,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-03 20:18:30,132 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 299 flow. Second operand 6 states and 117 transitions. [2024-06-03 20:18:30,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 519 flow [2024-06-03 20:18:30,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 505 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-03 20:18:30,141 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 343 flow [2024-06-03 20:18:30,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-03 20:18:30,144 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-03 20:18:30,144 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 343 flow [2024-06-03 20:18:30,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:30,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:30,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:30,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:18:30,145 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)] === [2024-06-03 20:18:30,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:30,146 INFO L85 PathProgramCache]: Analyzing trace with hash -967010002, now seen corresponding path program 2 times [2024-06-03 20:18:30,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:30,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528170951] [2024-06-03 20:18:30,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:30,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:30,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:30,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528170951] [2024-06-03 20:18:30,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528170951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:30,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:30,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:30,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745481453] [2024-06-03 20:18:30,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:30,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:30,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:30,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:30,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:30,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:30,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 343 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:30,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:30,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:30,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:31,421 INFO L124 PetriNetUnfolderBase]: 1363/2072 cut-off events. [2024-06-03 20:18:31,422 INFO L125 PetriNetUnfolderBase]: For 6845/6845 co-relation queries the response was YES. [2024-06-03 20:18:31,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7658 conditions, 2072 events. 1363/2072 cut-off events. For 6845/6845 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9793 event pairs, 563 based on Foata normal form. 4/2074 useless extension candidates. Maximal degree in co-relation 7631. Up to 1973 conditions per place. [2024-06-03 20:18:31,444 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 16 changer transitions 0/80 dead transitions. [2024-06-03 20:18:31,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 567 flow [2024-06-03 20:18:31,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:31,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-03 20:18:31,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-03 20:18:31,447 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 343 flow. Second operand 6 states and 117 transitions. [2024-06-03 20:18:31,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 567 flow [2024-06-03 20:18:31,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 80 transitions, 533 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:31,455 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 383 flow [2024-06-03 20:18:31,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-03 20:18:31,457 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-03 20:18:31,457 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 383 flow [2024-06-03 20:18:31,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:31,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:31,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:31,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:18:31,458 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:31,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:31,458 INFO L85 PathProgramCache]: Analyzing trace with hash -967001074, now seen corresponding path program 1 times [2024-06-03 20:18:31,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:31,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684142057] [2024-06-03 20:18:31,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:31,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:32,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:32,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684142057] [2024-06-03 20:18:32,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684142057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:32,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:32,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:32,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246426068] [2024-06-03 20:18:32,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:32,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:32,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:32,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:32,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:32,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:32,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 383 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) [2024-06-03 20:18:32,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:32,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:32,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:32,959 INFO L124 PetriNetUnfolderBase]: 1365/2080 cut-off events. [2024-06-03 20:18:32,960 INFO L125 PetriNetUnfolderBase]: For 8603/8603 co-relation queries the response was YES. [2024-06-03 20:18:32,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8135 conditions, 2080 events. 1365/2080 cut-off events. For 8603/8603 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9932 event pairs, 533 based on Foata normal form. 3/2082 useless extension candidates. Maximal degree in co-relation 8107. Up to 1986 conditions per place. [2024-06-03 20:18:32,977 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 62 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-03 20:18:32,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 659 flow [2024-06-03 20:18:32,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:32,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 20:18:32,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-03 20:18:32,980 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 383 flow. Second operand 7 states and 137 transitions. [2024-06-03 20:18:32,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 659 flow [2024-06-03 20:18:32,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 88 transitions, 609 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:32,988 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 422 flow [2024-06-03 20:18:32,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=422, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-03 20:18:32,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-03 20:18:32,990 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 422 flow [2024-06-03 20:18:32,991 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) [2024-06-03 20:18:32,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:32,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:32,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:18:32,991 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:32,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:32,992 INFO L85 PathProgramCache]: Analyzing trace with hash -119191137, now seen corresponding path program 1 times [2024-06-03 20:18:32,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:32,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292075716] [2024-06-03 20:18:32,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:32,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:33,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:33,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292075716] [2024-06-03 20:18:33,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292075716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:33,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:33,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:33,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262983729] [2024-06-03 20:18:33,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:33,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:33,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:33,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:33,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:33,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:33,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 422 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) [2024-06-03 20:18:33,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:33,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:33,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:34,413 INFO L124 PetriNetUnfolderBase]: 1501/2282 cut-off events. [2024-06-03 20:18:34,413 INFO L125 PetriNetUnfolderBase]: For 10888/10888 co-relation queries the response was YES. [2024-06-03 20:18:34,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9414 conditions, 2282 events. 1501/2282 cut-off events. For 10888/10888 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 11040 event pairs, 524 based on Foata normal form. 10/2291 useless extension candidates. Maximal degree in co-relation 9385. Up to 2058 conditions per place. [2024-06-03 20:18:34,428 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 81 selfloop transitions, 28 changer transitions 0/114 dead transitions. [2024-06-03 20:18:34,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 114 transitions, 878 flow [2024-06-03 20:18:34,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:34,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 20:18:34,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-03 20:18:34,430 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 422 flow. Second operand 7 states and 150 transitions. [2024-06-03 20:18:34,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 114 transitions, 878 flow [2024-06-03 20:18:34,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 114 transitions, 819 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:34,438 INFO L231 Difference]: Finished difference. Result has 72 places, 85 transitions, 599 flow [2024-06-03 20:18:34,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=599, PETRI_PLACES=72, PETRI_TRANSITIONS=85} [2024-06-03 20:18:34,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 29 predicate places. [2024-06-03 20:18:34,439 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 85 transitions, 599 flow [2024-06-03 20:18:34,439 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) [2024-06-03 20:18:34,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:34,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:34,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:18:34,440 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:34,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:34,440 INFO L85 PathProgramCache]: Analyzing trace with hash 86539921, now seen corresponding path program 2 times [2024-06-03 20:18:34,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:34,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188226011] [2024-06-03 20:18:34,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:34,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:34,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:35,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:35,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:35,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188226011] [2024-06-03 20:18:35,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188226011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:35,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:35,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:35,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976668158] [2024-06-03 20:18:35,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:35,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:35,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:35,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:35,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:35,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:35,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 85 transitions, 599 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) [2024-06-03 20:18:35,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:35,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:35,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:35,805 INFO L124 PetriNetUnfolderBase]: 1725/2613 cut-off events. [2024-06-03 20:18:35,805 INFO L125 PetriNetUnfolderBase]: For 17136/17136 co-relation queries the response was YES. [2024-06-03 20:18:35,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12660 conditions, 2613 events. 1725/2613 cut-off events. For 17136/17136 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 12984 event pairs, 550 based on Foata normal form. 10/2621 useless extension candidates. Maximal degree in co-relation 12627. Up to 2028 conditions per place. [2024-06-03 20:18:35,830 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 82 selfloop transitions, 44 changer transitions 0/131 dead transitions. [2024-06-03 20:18:35,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 131 transitions, 1181 flow [2024-06-03 20:18:35,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:35,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:35,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 20:18:35,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170068027210885 [2024-06-03 20:18:35,832 INFO L175 Difference]: Start difference. First operand has 72 places, 85 transitions, 599 flow. Second operand 7 states and 152 transitions. [2024-06-03 20:18:35,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 131 transitions, 1181 flow [2024-06-03 20:18:35,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 131 transitions, 1137 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-03 20:18:35,858 INFO L231 Difference]: Finished difference. Result has 80 places, 99 transitions, 843 flow [2024-06-03 20:18:35,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=843, PETRI_PLACES=80, PETRI_TRANSITIONS=99} [2024-06-03 20:18:35,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-03 20:18:35,861 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 99 transitions, 843 flow [2024-06-03 20:18:35,862 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) [2024-06-03 20:18:35,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:35,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:35,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:18:35,862 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:35,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:35,863 INFO L85 PathProgramCache]: Analyzing trace with hash -113626947, now seen corresponding path program 3 times [2024-06-03 20:18:35,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:35,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550636978] [2024-06-03 20:18:35,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:35,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:36,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:36,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550636978] [2024-06-03 20:18:36,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550636978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:36,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:36,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:36,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915977948] [2024-06-03 20:18:36,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:36,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:36,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:36,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:36,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:36,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:36,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 99 transitions, 843 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) [2024-06-03 20:18:36,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:36,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:36,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:37,325 INFO L124 PetriNetUnfolderBase]: 1805/2754 cut-off events. [2024-06-03 20:18:37,326 INFO L125 PetriNetUnfolderBase]: For 22598/22598 co-relation queries the response was YES. [2024-06-03 20:18:37,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14732 conditions, 2754 events. 1805/2754 cut-off events. For 22598/22598 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14013 event pairs, 591 based on Foata normal form. 10/2762 useless extension candidates. Maximal degree in co-relation 14694. Up to 2082 conditions per place. [2024-06-03 20:18:37,351 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 84 selfloop transitions, 48 changer transitions 0/137 dead transitions. [2024-06-03 20:18:37,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 137 transitions, 1371 flow [2024-06-03 20:18:37,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:37,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-03 20:18:37,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136054421768708 [2024-06-03 20:18:37,353 INFO L175 Difference]: Start difference. First operand has 80 places, 99 transitions, 843 flow. Second operand 7 states and 151 transitions. [2024-06-03 20:18:37,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 137 transitions, 1371 flow [2024-06-03 20:18:37,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 137 transitions, 1308 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:37,380 INFO L231 Difference]: Finished difference. Result has 87 places, 109 transitions, 1052 flow [2024-06-03 20:18:37,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=786, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1052, PETRI_PLACES=87, PETRI_TRANSITIONS=109} [2024-06-03 20:18:37,380 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-03 20:18:37,381 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 109 transitions, 1052 flow [2024-06-03 20:18:37,381 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) [2024-06-03 20:18:37,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:37,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:37,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:18:37,381 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)] === [2024-06-03 20:18:37,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:37,382 INFO L85 PathProgramCache]: Analyzing trace with hash 87739133, now seen corresponding path program 1 times [2024-06-03 20:18:37,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:37,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428064089] [2024-06-03 20:18:37,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:37,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:38,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:38,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428064089] [2024-06-03 20:18:38,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428064089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:38,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:38,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:38,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150209340] [2024-06-03 20:18:38,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:38,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:38,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:38,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:38,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:38,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 109 transitions, 1052 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) [2024-06-03 20:18:38,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:38,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:38,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:39,117 INFO L124 PetriNetUnfolderBase]: 1808/2752 cut-off events. [2024-06-03 20:18:39,117 INFO L125 PetriNetUnfolderBase]: For 25194/25194 co-relation queries the response was YES. [2024-06-03 20:18:39,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15458 conditions, 2752 events. 1808/2752 cut-off events. For 25194/25194 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13748 event pairs, 616 based on Foata normal form. 6/2757 useless extension candidates. Maximal degree in co-relation 15416. Up to 2581 conditions per place. [2024-06-03 20:18:39,143 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 24 changer transitions 0/138 dead transitions. [2024-06-03 20:18:39,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 1476 flow [2024-06-03 20:18:39,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:39,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:39,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 20:18:39,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-03 20:18:39,146 INFO L175 Difference]: Start difference. First operand has 87 places, 109 transitions, 1052 flow. Second operand 8 states and 155 transitions. [2024-06-03 20:18:39,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 1476 flow [2024-06-03 20:18:39,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 138 transitions, 1407 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:39,179 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 1095 flow [2024-06-03 20:18:39,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=983, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1095, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2024-06-03 20:18:39,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-03 20:18:39,180 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 1095 flow [2024-06-03 20:18:39,180 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) [2024-06-03 20:18:39,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:39,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:39,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:18:39,181 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:39,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:39,182 INFO L85 PathProgramCache]: Analyzing trace with hash -698979012, now seen corresponding path program 1 times [2024-06-03 20:18:39,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:39,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437048374] [2024-06-03 20:18:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:39,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:39,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:39,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:39,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437048374] [2024-06-03 20:18:39,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437048374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:39,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:39,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:18:39,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766307897] [2024-06-03 20:18:39,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:39,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:18:39,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:39,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:18:39,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:18:39,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:39,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 1095 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:39,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:39,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:39,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:40,276 INFO L124 PetriNetUnfolderBase]: 1805/2746 cut-off events. [2024-06-03 20:18:40,276 INFO L125 PetriNetUnfolderBase]: For 26861/26861 co-relation queries the response was YES. [2024-06-03 20:18:40,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15675 conditions, 2746 events. 1805/2746 cut-off events. For 26861/26861 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13718 event pairs, 642 based on Foata normal form. 1/2746 useless extension candidates. Maximal degree in co-relation 15631. Up to 2650 conditions per place. [2024-06-03 20:18:40,306 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 107 selfloop transitions, 8 changer transitions 0/120 dead transitions. [2024-06-03 20:18:40,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 120 transitions, 1345 flow [2024-06-03 20:18:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:18:40,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:18:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-03 20:18:40,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-03 20:18:40,308 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 1095 flow. Second operand 5 states and 92 transitions. [2024-06-03 20:18:40,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 120 transitions, 1345 flow [2024-06-03 20:18:40,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 120 transitions, 1251 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:40,339 INFO L231 Difference]: Finished difference. Result has 92 places, 112 transitions, 1023 flow [2024-06-03 20:18:40,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1023, PETRI_PLACES=92, PETRI_TRANSITIONS=112} [2024-06-03 20:18:40,340 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-03 20:18:40,340 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 112 transitions, 1023 flow [2024-06-03 20:18:40,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:40,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:40,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:40,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:18:40,341 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)] === [2024-06-03 20:18:40,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:40,342 INFO L85 PathProgramCache]: Analyzing trace with hash 595274829, now seen corresponding path program 1 times [2024-06-03 20:18:40,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:40,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323576271] [2024-06-03 20:18:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:40,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:40,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:41,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:41,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323576271] [2024-06-03 20:18:41,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323576271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:41,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:41,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:18:41,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704867320] [2024-06-03 20:18:41,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:41,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:18:41,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:41,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:18:41,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:18:41,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:41,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 112 transitions, 1023 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) [2024-06-03 20:18:41,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:41,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:41,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:41,844 INFO L124 PetriNetUnfolderBase]: 1800/2739 cut-off events. [2024-06-03 20:18:41,844 INFO L125 PetriNetUnfolderBase]: For 28834/28834 co-relation queries the response was YES. [2024-06-03 20:18:41,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15540 conditions, 2739 events. 1800/2739 cut-off events. For 28834/28834 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13649 event pairs, 621 based on Foata normal form. 2/2740 useless extension candidates. Maximal degree in co-relation 15495. Up to 2607 conditions per place. [2024-06-03 20:18:41,871 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 121 selfloop transitions, 14 changer transitions 0/140 dead transitions. [2024-06-03 20:18:41,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 140 transitions, 1403 flow [2024-06-03 20:18:41,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:41,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-03 20:18:41,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-03 20:18:41,873 INFO L175 Difference]: Start difference. First operand has 92 places, 112 transitions, 1023 flow. Second operand 7 states and 136 transitions. [2024-06-03 20:18:41,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 140 transitions, 1403 flow [2024-06-03 20:18:41,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 140 transitions, 1381 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:41,907 INFO L231 Difference]: Finished difference. Result has 95 places, 115 transitions, 1089 flow [2024-06-03 20:18:41,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1001, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1089, PETRI_PLACES=95, PETRI_TRANSITIONS=115} [2024-06-03 20:18:41,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-03 20:18:41,908 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 115 transitions, 1089 flow [2024-06-03 20:18:41,909 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) [2024-06-03 20:18:41,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:41,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:41,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:18:41,909 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)] === [2024-06-03 20:18:41,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:41,910 INFO L85 PathProgramCache]: Analyzing trace with hash 600043373, now seen corresponding path program 1 times [2024-06-03 20:18:41,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:41,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443592224] [2024-06-03 20:18:41,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:41,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:42,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:42,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443592224] [2024-06-03 20:18:42,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443592224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:42,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:42,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:42,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048891000] [2024-06-03 20:18:42,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:42,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:42,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:42,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:42,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:43,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:43,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 115 transitions, 1089 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) [2024-06-03 20:18:43,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:43,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:43,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:43,588 INFO L124 PetriNetUnfolderBase]: 1864/2830 cut-off events. [2024-06-03 20:18:43,588 INFO L125 PetriNetUnfolderBase]: For 33224/33224 co-relation queries the response was YES. [2024-06-03 20:18:43,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16483 conditions, 2830 events. 1864/2830 cut-off events. For 33224/33224 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 14216 event pairs, 548 based on Foata normal form. 10/2839 useless extension candidates. Maximal degree in co-relation 16438. Up to 2524 conditions per place. [2024-06-03 20:18:43,616 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 116 selfloop transitions, 34 changer transitions 0/155 dead transitions. [2024-06-03 20:18:43,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 155 transitions, 1645 flow [2024-06-03 20:18:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:43,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:43,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 20:18:43,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-03 20:18:43,618 INFO L175 Difference]: Start difference. First operand has 95 places, 115 transitions, 1089 flow. Second operand 8 states and 171 transitions. [2024-06-03 20:18:43,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 155 transitions, 1645 flow [2024-06-03 20:18:43,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 155 transitions, 1581 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:43,653 INFO L231 Difference]: Finished difference. Result has 98 places, 121 transitions, 1186 flow [2024-06-03 20:18:43,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1025, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1186, PETRI_PLACES=98, PETRI_TRANSITIONS=121} [2024-06-03 20:18:43,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 55 predicate places. [2024-06-03 20:18:43,654 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 121 transitions, 1186 flow [2024-06-03 20:18:43,655 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) [2024-06-03 20:18:43,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:43,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:43,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:18:43,655 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)] === [2024-06-03 20:18:43,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:43,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1583634579, now seen corresponding path program 2 times [2024-06-03 20:18:43,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:43,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670557673] [2024-06-03 20:18:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:43,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:44,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:44,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670557673] [2024-06-03 20:18:44,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670557673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:44,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:44,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:44,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340550779] [2024-06-03 20:18:44,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:44,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:44,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:44,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:44,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:44,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:44,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 121 transitions, 1186 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) [2024-06-03 20:18:44,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:44,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:44,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:45,256 INFO L124 PetriNetUnfolderBase]: 1920/2974 cut-off events. [2024-06-03 20:18:45,257 INFO L125 PetriNetUnfolderBase]: For 38000/38000 co-relation queries the response was YES. [2024-06-03 20:18:45,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18034 conditions, 2974 events. 1920/2974 cut-off events. For 38000/38000 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15536 event pairs, 492 based on Foata normal form. 5/2977 useless extension candidates. Maximal degree in co-relation 17988. Up to 2426 conditions per place. [2024-06-03 20:18:45,276 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 141 selfloop transitions, 56 changer transitions 0/202 dead transitions. [2024-06-03 20:18:45,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 202 transitions, 2315 flow [2024-06-03 20:18:45,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:45,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:45,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 20:18:45,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-03 20:18:45,278 INFO L175 Difference]: Start difference. First operand has 98 places, 121 transitions, 1186 flow. Second operand 8 states and 170 transitions. [2024-06-03 20:18:45,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 202 transitions, 2315 flow [2024-06-03 20:18:45,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 202 transitions, 2183 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:45,319 INFO L231 Difference]: Finished difference. Result has 104 places, 160 transitions, 1717 flow [2024-06-03 20:18:45,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1071, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1717, PETRI_PLACES=104, PETRI_TRANSITIONS=160} [2024-06-03 20:18:45,320 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-03 20:18:45,320 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 160 transitions, 1717 flow [2024-06-03 20:18:45,321 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) [2024-06-03 20:18:45,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:45,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:45,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:18:45,321 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:45,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:45,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1611931751, now seen corresponding path program 3 times [2024-06-03 20:18:45,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:45,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404213211] [2024-06-03 20:18:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:45,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:46,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:46,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404213211] [2024-06-03 20:18:46,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404213211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:46,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:46,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:46,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066206789] [2024-06-03 20:18:46,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:46,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:46,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:46,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:46,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:46,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:46,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 160 transitions, 1717 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) [2024-06-03 20:18:46,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:46,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:46,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:46,983 INFO L124 PetriNetUnfolderBase]: 1992/3057 cut-off events. [2024-06-03 20:18:46,983 INFO L125 PetriNetUnfolderBase]: For 45188/45188 co-relation queries the response was YES. [2024-06-03 20:18:46,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20101 conditions, 3057 events. 1992/3057 cut-off events. For 45188/45188 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15843 event pairs, 495 based on Foata normal form. 5/3060 useless extension candidates. Maximal degree in co-relation 20050. Up to 2394 conditions per place. [2024-06-03 20:18:47,002 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 142 selfloop transitions, 76 changer transitions 0/223 dead transitions. [2024-06-03 20:18:47,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 223 transitions, 2773 flow [2024-06-03 20:18:47,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:47,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-03 20:18:47,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-06-03 20:18:47,003 INFO L175 Difference]: Start difference. First operand has 104 places, 160 transitions, 1717 flow. Second operand 8 states and 172 transitions. [2024-06-03 20:18:47,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 223 transitions, 2773 flow [2024-06-03 20:18:47,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 223 transitions, 2705 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-03 20:18:47,042 INFO L231 Difference]: Finished difference. Result has 114 places, 183 transitions, 2214 flow [2024-06-03 20:18:47,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1651, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2214, PETRI_PLACES=114, PETRI_TRANSITIONS=183} [2024-06-03 20:18:47,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-03 20:18:47,043 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 183 transitions, 2214 flow [2024-06-03 20:18:47,043 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) [2024-06-03 20:18:47,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:47,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:47,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:18:47,044 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)] === [2024-06-03 20:18:47,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:47,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1612228421, now seen corresponding path program 4 times [2024-06-03 20:18:47,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:47,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258464355] [2024-06-03 20:18:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:47,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:47,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:47,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:47,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258464355] [2024-06-03 20:18:47,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258464355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:47,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:47,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:47,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053962588] [2024-06-03 20:18:47,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:47,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:47,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:47,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:47,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:48,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:48,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 183 transitions, 2214 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) [2024-06-03 20:18:48,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:48,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:48,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:48,781 INFO L124 PetriNetUnfolderBase]: 2000/3072 cut-off events. [2024-06-03 20:18:48,781 INFO L125 PetriNetUnfolderBase]: For 52335/52335 co-relation queries the response was YES. [2024-06-03 20:18:48,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21867 conditions, 3072 events. 2000/3072 cut-off events. For 52335/52335 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 15926 event pairs, 495 based on Foata normal form. 5/3075 useless extension candidates. Maximal degree in co-relation 21810. Up to 2539 conditions per place. [2024-06-03 20:18:48,855 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 155 selfloop transitions, 64 changer transitions 0/224 dead transitions. [2024-06-03 20:18:48,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 224 transitions, 2999 flow [2024-06-03 20:18:48,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:48,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 20:18:48,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2024-06-03 20:18:48,857 INFO L175 Difference]: Start difference. First operand has 114 places, 183 transitions, 2214 flow. Second operand 8 states and 170 transitions. [2024-06-03 20:18:48,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 224 transitions, 2999 flow [2024-06-03 20:18:48,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 224 transitions, 2909 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:48,904 INFO L231 Difference]: Finished difference. Result has 121 places, 188 transitions, 2381 flow [2024-06-03 20:18:48,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2381, PETRI_PLACES=121, PETRI_TRANSITIONS=188} [2024-06-03 20:18:48,905 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-03 20:18:48,905 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 188 transitions, 2381 flow [2024-06-03 20:18:48,905 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) [2024-06-03 20:18:48,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:48,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:48,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:18:48,905 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:48,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:48,906 INFO L85 PathProgramCache]: Analyzing trace with hash -193511713, now seen corresponding path program 1 times [2024-06-03 20:18:48,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:48,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387209438] [2024-06-03 20:18:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:48,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:48,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:49,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:49,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:49,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387209438] [2024-06-03 20:18:49,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387209438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:49,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:49,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:49,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70534756] [2024-06-03 20:18:49,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:49,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:49,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:49,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:49,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:49,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:49,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 188 transitions, 2381 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:49,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:49,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:49,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:50,217 INFO L124 PetriNetUnfolderBase]: 2014/3066 cut-off events. [2024-06-03 20:18:50,217 INFO L125 PetriNetUnfolderBase]: For 57191/57191 co-relation queries the response was YES. [2024-06-03 20:18:50,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22721 conditions, 3066 events. 2014/3066 cut-off events. For 57191/57191 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 15675 event pairs, 586 based on Foata normal form. 6/3069 useless extension candidates. Maximal degree in co-relation 22661. Up to 2853 conditions per place. [2024-06-03 20:18:50,241 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 179 selfloop transitions, 27 changer transitions 0/211 dead transitions. [2024-06-03 20:18:50,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 211 transitions, 3035 flow [2024-06-03 20:18:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:50,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:50,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-03 20:18:50,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-03 20:18:50,242 INFO L175 Difference]: Start difference. First operand has 121 places, 188 transitions, 2381 flow. Second operand 6 states and 116 transitions. [2024-06-03 20:18:50,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 211 transitions, 3035 flow [2024-06-03 20:18:50,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 211 transitions, 2848 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:50,293 INFO L231 Difference]: Finished difference. Result has 123 places, 198 transitions, 2444 flow [2024-06-03 20:18:50,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2200, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2444, PETRI_PLACES=123, PETRI_TRANSITIONS=198} [2024-06-03 20:18:50,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-03 20:18:50,293 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 198 transitions, 2444 flow [2024-06-03 20:18:50,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:50,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:50,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:50,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:18:50,294 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)] === [2024-06-03 20:18:50,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:50,294 INFO L85 PathProgramCache]: Analyzing trace with hash -736627660, now seen corresponding path program 1 times [2024-06-03 20:18:50,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:50,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714588231] [2024-06-03 20:18:50,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:50,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:51,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:51,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:51,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714588231] [2024-06-03 20:18:51,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714588231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:51,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:51,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:51,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254728326] [2024-06-03 20:18:51,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:51,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:51,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:51,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:51,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:51,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:51,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 198 transitions, 2444 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) [2024-06-03 20:18:51,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:51,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:51,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:52,096 INFO L124 PetriNetUnfolderBase]: 2113/3218 cut-off events. [2024-06-03 20:18:52,096 INFO L125 PetriNetUnfolderBase]: For 63706/63706 co-relation queries the response was YES. [2024-06-03 20:18:52,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24035 conditions, 3218 events. 2113/3218 cut-off events. For 63706/63706 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 16485 event pairs, 575 based on Foata normal form. 6/3223 useless extension candidates. Maximal degree in co-relation 23973. Up to 2953 conditions per place. [2024-06-03 20:18:52,120 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 217 selfloop transitions, 44 changer transitions 0/266 dead transitions. [2024-06-03 20:18:52,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 266 transitions, 3652 flow [2024-06-03 20:18:52,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:18:52,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:18:52,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-03 20:18:52,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-03 20:18:52,122 INFO L175 Difference]: Start difference. First operand has 123 places, 198 transitions, 2444 flow. Second operand 10 states and 204 transitions. [2024-06-03 20:18:52,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 266 transitions, 3652 flow [2024-06-03 20:18:52,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 266 transitions, 3567 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:52,182 INFO L231 Difference]: Finished difference. Result has 134 places, 224 transitions, 2894 flow [2024-06-03 20:18:52,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2376, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2894, PETRI_PLACES=134, PETRI_TRANSITIONS=224} [2024-06-03 20:18:52,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-03 20:18:52,182 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 224 transitions, 2894 flow [2024-06-03 20:18:52,183 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) [2024-06-03 20:18:52,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:52,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:52,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:18:52,183 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)] === [2024-06-03 20:18:52,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:52,184 INFO L85 PathProgramCache]: Analyzing trace with hash -328753252, now seen corresponding path program 2 times [2024-06-03 20:18:52,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:52,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278893909] [2024-06-03 20:18:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:52,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:52,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:53,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:53,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278893909] [2024-06-03 20:18:53,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278893909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:53,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:53,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:53,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598943071] [2024-06-03 20:18:53,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:53,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:53,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:53,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:53,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:53,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:53,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 224 transitions, 2894 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) [2024-06-03 20:18:53,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:53,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:53,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:53,927 INFO L124 PetriNetUnfolderBase]: 2145/3277 cut-off events. [2024-06-03 20:18:53,927 INFO L125 PetriNetUnfolderBase]: For 71460/71460 co-relation queries the response was YES. [2024-06-03 20:18:53,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25435 conditions, 3277 events. 2145/3277 cut-off events. For 71460/71460 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16959 event pairs, 557 based on Foata normal form. 5/3281 useless extension candidates. Maximal degree in co-relation 25368. Up to 2969 conditions per place. [2024-06-03 20:18:53,952 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 218 selfloop transitions, 49 changer transitions 0/272 dead transitions. [2024-06-03 20:18:53,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 272 transitions, 3980 flow [2024-06-03 20:18:53,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:53,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 20:18:53,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5089285714285714 [2024-06-03 20:18:53,954 INFO L175 Difference]: Start difference. First operand has 134 places, 224 transitions, 2894 flow. Second operand 8 states and 171 transitions. [2024-06-03 20:18:53,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 272 transitions, 3980 flow [2024-06-03 20:18:54,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 272 transitions, 3773 flow, removed 98 selfloop flow, removed 2 redundant places. [2024-06-03 20:18:54,022 INFO L231 Difference]: Finished difference. Result has 141 places, 239 transitions, 3165 flow [2024-06-03 20:18:54,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2751, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3165, PETRI_PLACES=141, PETRI_TRANSITIONS=239} [2024-06-03 20:18:54,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-03 20:18:54,023 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 239 transitions, 3165 flow [2024-06-03 20:18:54,024 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) [2024-06-03 20:18:54,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:54,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:54,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:18:54,024 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)] === [2024-06-03 20:18:54,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:54,025 INFO L85 PathProgramCache]: Analyzing trace with hash -621969168, now seen corresponding path program 1 times [2024-06-03 20:18:54,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:54,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018603794] [2024-06-03 20:18:54,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:54,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:55,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:55,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018603794] [2024-06-03 20:18:55,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018603794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:55,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:55,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:55,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016744692] [2024-06-03 20:18:55,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:55,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:55,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:55,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:55,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:55,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:55,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 239 transitions, 3165 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:55,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:55,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:55,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:56,034 INFO L124 PetriNetUnfolderBase]: 2545/3940 cut-off events. [2024-06-03 20:18:56,034 INFO L125 PetriNetUnfolderBase]: For 107178/107178 co-relation queries the response was YES. [2024-06-03 20:18:56,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29986 conditions, 3940 events. 2545/3940 cut-off events. For 107178/107178 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21324 event pairs, 630 based on Foata normal form. 92/4031 useless extension candidates. Maximal degree in co-relation 29915. Up to 2970 conditions per place. [2024-06-03 20:18:56,068 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 235 selfloop transitions, 47 changer transitions 0/287 dead transitions. [2024-06-03 20:18:56,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 287 transitions, 4114 flow [2024-06-03 20:18:56,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:56,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:56,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-03 20:18:56,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-03 20:18:56,070 INFO L175 Difference]: Start difference. First operand has 141 places, 239 transitions, 3165 flow. Second operand 9 states and 195 transitions. [2024-06-03 20:18:56,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 287 transitions, 4114 flow [2024-06-03 20:18:56,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 287 transitions, 3932 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:56,175 INFO L231 Difference]: Finished difference. Result has 146 places, 242 transitions, 3174 flow [2024-06-03 20:18:56,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3174, PETRI_PLACES=146, PETRI_TRANSITIONS=242} [2024-06-03 20:18:56,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-03 20:18:56,176 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 242 transitions, 3174 flow [2024-06-03 20:18:56,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:56,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:56,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:56,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:18:56,177 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:56,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:56,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1348011449, now seen corresponding path program 1 times [2024-06-03 20:18:56,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:56,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466583283] [2024-06-03 20:18:56,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:56,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:56,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:56,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:56,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466583283] [2024-06-03 20:18:56,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466583283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:56,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:56,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:18:56,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868628728] [2024-06-03 20:18:56,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:56,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:18:56,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:56,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:18:56,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:18:56,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:56,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 242 transitions, 3174 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:56,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:56,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:56,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:57,506 INFO L124 PetriNetUnfolderBase]: 2552/3954 cut-off events. [2024-06-03 20:18:57,506 INFO L125 PetriNetUnfolderBase]: For 92730/92730 co-relation queries the response was YES. [2024-06-03 20:18:57,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30490 conditions, 3954 events. 2552/3954 cut-off events. For 92730/92730 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21397 event pairs, 691 based on Foata normal form. 3/3956 useless extension candidates. Maximal degree in co-relation 30417. Up to 3693 conditions per place. [2024-06-03 20:18:57,541 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 44 changer transitions 0/265 dead transitions. [2024-06-03 20:18:57,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 265 transitions, 3919 flow [2024-06-03 20:18:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:57,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:57,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-03 20:18:57,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-03 20:18:57,542 INFO L175 Difference]: Start difference. First operand has 146 places, 242 transitions, 3174 flow. Second operand 6 states and 123 transitions. [2024-06-03 20:18:57,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 265 transitions, 3919 flow [2024-06-03 20:18:57,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 265 transitions, 3758 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:57,736 INFO L231 Difference]: Finished difference. Result has 145 places, 247 transitions, 3219 flow [2024-06-03 20:18:57,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3019, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3219, PETRI_PLACES=145, PETRI_TRANSITIONS=247} [2024-06-03 20:18:57,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-03 20:18:57,737 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 247 transitions, 3219 flow [2024-06-03 20:18:57,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:57,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:57,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:57,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:18:57,737 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:57,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:57,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1304027346, now seen corresponding path program 2 times [2024-06-03 20:18:57,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:57,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648136842] [2024-06-03 20:18:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:57,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:58,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:58,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648136842] [2024-06-03 20:18:58,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648136842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:58,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:58,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:58,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358557104] [2024-06-03 20:18:58,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:58,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:58,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:58,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:58,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:58,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:58,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 247 transitions, 3219 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:58,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:58,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:58,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:59,675 INFO L124 PetriNetUnfolderBase]: 2991/4671 cut-off events. [2024-06-03 20:18:59,676 INFO L125 PetriNetUnfolderBase]: For 127810/127810 co-relation queries the response was YES. [2024-06-03 20:18:59,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34566 conditions, 4671 events. 2991/4671 cut-off events. For 127810/127810 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 26435 event pairs, 704 based on Foata normal form. 97/4766 useless extension candidates. Maximal degree in co-relation 34492. Up to 3296 conditions per place. [2024-06-03 20:18:59,712 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 218 selfloop transitions, 82 changer transitions 0/305 dead transitions. [2024-06-03 20:18:59,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 305 transitions, 4453 flow [2024-06-03 20:18:59,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:59,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-03 20:18:59,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-03 20:18:59,714 INFO L175 Difference]: Start difference. First operand has 145 places, 247 transitions, 3219 flow. Second operand 9 states and 199 transitions. [2024-06-03 20:18:59,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 305 transitions, 4453 flow [2024-06-03 20:18:59,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 305 transitions, 4357 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-03 20:18:59,837 INFO L231 Difference]: Finished difference. Result has 152 places, 258 transitions, 3564 flow [2024-06-03 20:18:59,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3123, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3564, PETRI_PLACES=152, PETRI_TRANSITIONS=258} [2024-06-03 20:18:59,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-03 20:18:59,838 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 258 transitions, 3564 flow [2024-06-03 20:18:59,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:59,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:59,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:59,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:18:59,839 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:59,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:59,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1582333058, now seen corresponding path program 3 times [2024-06-03 20:18:59,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:59,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114028158] [2024-06-03 20:18:59,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:59,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:00,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:00,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:00,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114028158] [2024-06-03 20:19:00,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114028158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:00,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:00,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:00,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056902803] [2024-06-03 20:19:00,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:00,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:00,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:00,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:00,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:00,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:00,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 258 transitions, 3564 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:00,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:00,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:00,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:02,048 INFO L124 PetriNetUnfolderBase]: 3469/5453 cut-off events. [2024-06-03 20:19:02,048 INFO L125 PetriNetUnfolderBase]: For 163907/163907 co-relation queries the response was YES. [2024-06-03 20:19:02,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41655 conditions, 5453 events. 3469/5453 cut-off events. For 163907/163907 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 31926 event pairs, 824 based on Foata normal form. 97/5548 useless extension candidates. Maximal degree in co-relation 41579. Up to 3857 conditions per place. [2024-06-03 20:19:02,092 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 208 selfloop transitions, 119 changer transitions 0/332 dead transitions. [2024-06-03 20:19:02,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 332 transitions, 5085 flow [2024-06-03 20:19:02,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:19:02,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:19:02,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-03 20:19:02,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-03 20:19:02,093 INFO L175 Difference]: Start difference. First operand has 152 places, 258 transitions, 3564 flow. Second operand 10 states and 222 transitions. [2024-06-03 20:19:02,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 332 transitions, 5085 flow [2024-06-03 20:19:02,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 332 transitions, 4819 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:02,246 INFO L231 Difference]: Finished difference. Result has 158 places, 279 transitions, 4021 flow [2024-06-03 20:19:02,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3302, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4021, PETRI_PLACES=158, PETRI_TRANSITIONS=279} [2024-06-03 20:19:02,246 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-03 20:19:02,246 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 279 transitions, 4021 flow [2024-06-03 20:19:02,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:02,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:02,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:02,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:19:02,247 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:02,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:02,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1582006628, now seen corresponding path program 4 times [2024-06-03 20:19:02,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:02,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189610614] [2024-06-03 20:19:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:02,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:03,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:03,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:03,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189610614] [2024-06-03 20:19:03,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189610614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:03,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:03,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:03,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880004835] [2024-06-03 20:19:03,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:03,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:03,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:03,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:03,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:03,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:03,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 279 transitions, 4021 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:03,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:03,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:03,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:04,459 INFO L124 PetriNetUnfolderBase]: 3908/6174 cut-off events. [2024-06-03 20:19:04,459 INFO L125 PetriNetUnfolderBase]: For 189359/189359 co-relation queries the response was YES. [2024-06-03 20:19:04,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49577 conditions, 6174 events. 3908/6174 cut-off events. For 189359/189359 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 37122 event pairs, 951 based on Foata normal form. 18/6190 useless extension candidates. Maximal degree in co-relation 49498. Up to 2579 conditions per place. [2024-06-03 20:19:04,636 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 213 selfloop transitions, 120 changer transitions 0/338 dead transitions. [2024-06-03 20:19:04,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 338 transitions, 5437 flow [2024-06-03 20:19:04,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:04,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-03 20:19:04,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-03 20:19:04,638 INFO L175 Difference]: Start difference. First operand has 158 places, 279 transitions, 4021 flow. Second operand 9 states and 203 transitions. [2024-06-03 20:19:04,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 338 transitions, 5437 flow [2024-06-03 20:19:04,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 338 transitions, 5215 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:04,873 INFO L231 Difference]: Finished difference. Result has 164 places, 284 transitions, 4236 flow [2024-06-03 20:19:04,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3799, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4236, PETRI_PLACES=164, PETRI_TRANSITIONS=284} [2024-06-03 20:19:04,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-03 20:19:04,873 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 284 transitions, 4236 flow [2024-06-03 20:19:04,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:04,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:04,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:04,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:19:04,874 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:04,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:04,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1703044577, now seen corresponding path program 2 times [2024-06-03 20:19:04,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:04,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860255007] [2024-06-03 20:19:04,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:04,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:05,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:05,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:05,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860255007] [2024-06-03 20:19:05,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860255007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:05,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:05,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:19:05,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129849402] [2024-06-03 20:19:05,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:05,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:19:05,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:05,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:19:05,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:19:05,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:05,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 284 transitions, 4236 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:05,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:05,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:05,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:06,844 INFO L124 PetriNetUnfolderBase]: 3879/6127 cut-off events. [2024-06-03 20:19:06,844 INFO L125 PetriNetUnfolderBase]: For 191553/191553 co-relation queries the response was YES. [2024-06-03 20:19:06,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50081 conditions, 6127 events. 3879/6127 cut-off events. For 191553/191553 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 36936 event pairs, 1245 based on Foata normal form. 7/6131 useless extension candidates. Maximal degree in co-relation 49999. Up to 5846 conditions per place. [2024-06-03 20:19:06,895 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 249 selfloop transitions, 41 changer transitions 0/295 dead transitions. [2024-06-03 20:19:06,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 295 transitions, 4872 flow [2024-06-03 20:19:06,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:19:06,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:19:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-03 20:19:06,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45634920634920634 [2024-06-03 20:19:06,897 INFO L175 Difference]: Start difference. First operand has 164 places, 284 transitions, 4236 flow. Second operand 6 states and 115 transitions. [2024-06-03 20:19:06,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 295 transitions, 4872 flow [2024-06-03 20:19:07,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 295 transitions, 4628 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:07,132 INFO L231 Difference]: Finished difference. Result has 166 places, 284 transitions, 4095 flow [2024-06-03 20:19:07,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3995, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4095, PETRI_PLACES=166, PETRI_TRANSITIONS=284} [2024-06-03 20:19:07,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-03 20:19:07,132 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 284 transitions, 4095 flow [2024-06-03 20:19:07,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:07,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:07,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:07,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:19:07,133 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:07,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:07,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1354684633, now seen corresponding path program 1 times [2024-06-03 20:19:07,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:07,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102553614] [2024-06-03 20:19:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:07,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:07,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:07,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102553614] [2024-06-03 20:19:07,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102553614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:07,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:07,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:19:07,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066614657] [2024-06-03 20:19:07,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:07,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:19:07,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:07,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:19:07,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:19:07,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:07,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 284 transitions, 4095 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:07,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:07,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:07,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:08,738 INFO L124 PetriNetUnfolderBase]: 3881/6127 cut-off events. [2024-06-03 20:19:08,738 INFO L125 PetriNetUnfolderBase]: For 189277/189277 co-relation queries the response was YES. [2024-06-03 20:19:08,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49779 conditions, 6127 events. 3881/6127 cut-off events. For 189277/189277 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 36979 event pairs, 1193 based on Foata normal form. 2/6128 useless extension candidates. Maximal degree in co-relation 49695. Up to 5912 conditions per place. [2024-06-03 20:19:08,793 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 276 selfloop transitions, 19 changer transitions 0/300 dead transitions. [2024-06-03 20:19:08,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 300 transitions, 4822 flow [2024-06-03 20:19:08,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:19:08,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:19:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-03 20:19:08,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:19:08,794 INFO L175 Difference]: Start difference. First operand has 166 places, 284 transitions, 4095 flow. Second operand 6 states and 114 transitions. [2024-06-03 20:19:08,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 300 transitions, 4822 flow [2024-06-03 20:19:09,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 300 transitions, 4696 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:09,028 INFO L231 Difference]: Finished difference. Result has 166 places, 287 transitions, 4058 flow [2024-06-03 20:19:09,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3969, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4058, PETRI_PLACES=166, PETRI_TRANSITIONS=287} [2024-06-03 20:19:09,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-03 20:19:09,029 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 287 transitions, 4058 flow [2024-06-03 20:19:09,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:09,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:09,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:09,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:19:09,029 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:09,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:09,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1703902533, now seen corresponding path program 2 times [2024-06-03 20:19:09,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:09,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266453514] [2024-06-03 20:19:09,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:09,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:09,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:09,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:09,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:09,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266453514] [2024-06-03 20:19:09,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266453514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:09,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:09,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:19:09,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083609669] [2024-06-03 20:19:09,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:09,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:19:09,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:09,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:19:09,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:19:09,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:09,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 287 transitions, 4058 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:09,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:09,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:09,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:10,594 INFO L124 PetriNetUnfolderBase]: 3842/6060 cut-off events. [2024-06-03 20:19:10,594 INFO L125 PetriNetUnfolderBase]: For 193890/193890 co-relation queries the response was YES. [2024-06-03 20:19:10,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49457 conditions, 6060 events. 3842/6060 cut-off events. For 193890/193890 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 36436 event pairs, 1193 based on Foata normal form. 1/6060 useless extension candidates. Maximal degree in co-relation 49372. Up to 5880 conditions per place. [2024-06-03 20:19:10,651 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 280 selfloop transitions, 11 changer transitions 0/296 dead transitions. [2024-06-03 20:19:10,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 296 transitions, 4666 flow [2024-06-03 20:19:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:19:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:19:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-03 20:19:10,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-03 20:19:10,652 INFO L175 Difference]: Start difference. First operand has 166 places, 287 transitions, 4058 flow. Second operand 6 states and 106 transitions. [2024-06-03 20:19:10,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 296 transitions, 4666 flow [2024-06-03 20:19:10,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 296 transitions, 4637 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 20:19:10,867 INFO L231 Difference]: Finished difference. Result has 169 places, 287 transitions, 4057 flow [2024-06-03 20:19:10,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4029, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4057, PETRI_PLACES=169, PETRI_TRANSITIONS=287} [2024-06-03 20:19:10,867 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-03 20:19:10,868 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 287 transitions, 4057 flow [2024-06-03 20:19:10,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:10,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:10,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:10,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:19:10,868 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)] === [2024-06-03 20:19:10,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:10,869 INFO L85 PathProgramCache]: Analyzing trace with hash 938606512, now seen corresponding path program 1 times [2024-06-03 20:19:10,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:10,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74303209] [2024-06-03 20:19:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:10,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:11,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:11,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:11,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74303209] [2024-06-03 20:19:11,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74303209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:11,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:11,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:11,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178195398] [2024-06-03 20:19:11,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:11,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:11,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:11,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:11,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:11,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:11,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 287 transitions, 4057 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) [2024-06-03 20:19:11,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:11,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:11,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:13,016 INFO L124 PetriNetUnfolderBase]: 3859/6088 cut-off events. [2024-06-03 20:19:13,016 INFO L125 PetriNetUnfolderBase]: For 203715/203715 co-relation queries the response was YES. [2024-06-03 20:19:13,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49935 conditions, 6088 events. 3859/6088 cut-off events. For 203715/203715 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 36492 event pairs, 1030 based on Foata normal form. 4/6091 useless extension candidates. Maximal degree in co-relation 49849. Up to 5819 conditions per place. [2024-06-03 20:19:13,084 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 297 selfloop transitions, 17 changer transitions 0/319 dead transitions. [2024-06-03 20:19:13,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 319 transitions, 4839 flow [2024-06-03 20:19:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:13,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 20:19:13,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-03 20:19:13,086 INFO L175 Difference]: Start difference. First operand has 169 places, 287 transitions, 4057 flow. Second operand 8 states and 153 transitions. [2024-06-03 20:19:13,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 319 transitions, 4839 flow [2024-06-03 20:19:13,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 319 transitions, 4792 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:13,334 INFO L231 Difference]: Finished difference. Result has 171 places, 289 transitions, 4119 flow [2024-06-03 20:19:13,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4119, PETRI_PLACES=171, PETRI_TRANSITIONS=289} [2024-06-03 20:19:13,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-03 20:19:13,335 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 289 transitions, 4119 flow [2024-06-03 20:19:13,335 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) [2024-06-03 20:19:13,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:13,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:13,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:19:13,336 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)] === [2024-06-03 20:19:13,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:13,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1906183226, now seen corresponding path program 2 times [2024-06-03 20:19:13,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:13,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380143910] [2024-06-03 20:19:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:13,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:13,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:14,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:14,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:14,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380143910] [2024-06-03 20:19:14,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380143910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:14,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:14,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:14,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081524441] [2024-06-03 20:19:14,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:14,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:14,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:14,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:14,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:14,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:14,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 289 transitions, 4119 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) [2024-06-03 20:19:14,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:14,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:14,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:15,380 INFO L124 PetriNetUnfolderBase]: 3876/6115 cut-off events. [2024-06-03 20:19:15,380 INFO L125 PetriNetUnfolderBase]: For 214558/214558 co-relation queries the response was YES. [2024-06-03 20:19:15,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50623 conditions, 6115 events. 3876/6115 cut-off events. For 214558/214558 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 36749 event pairs, 1145 based on Foata normal form. 4/6118 useless extension candidates. Maximal degree in co-relation 50536. Up to 5864 conditions per place. [2024-06-03 20:19:15,433 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 295 selfloop transitions, 20 changer transitions 0/320 dead transitions. [2024-06-03 20:19:15,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 320 transitions, 4905 flow [2024-06-03 20:19:15,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 20:19:15,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-03 20:19:15,434 INFO L175 Difference]: Start difference. First operand has 171 places, 289 transitions, 4119 flow. Second operand 8 states and 153 transitions. [2024-06-03 20:19:15,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 320 transitions, 4905 flow [2024-06-03 20:19:15,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 320 transitions, 4814 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:15,668 INFO L231 Difference]: Finished difference. Result has 173 places, 291 transitions, 4148 flow [2024-06-03 20:19:15,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4028, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4148, PETRI_PLACES=173, PETRI_TRANSITIONS=291} [2024-06-03 20:19:15,669 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-03 20:19:15,669 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 291 transitions, 4148 flow [2024-06-03 20:19:15,669 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) [2024-06-03 20:19:15,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:15,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:15,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:19:15,670 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)] === [2024-06-03 20:19:15,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:15,670 INFO L85 PathProgramCache]: Analyzing trace with hash 828501708, now seen corresponding path program 1 times [2024-06-03 20:19:15,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:15,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141729445] [2024-06-03 20:19:15,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:15,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:16,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:16,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:16,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141729445] [2024-06-03 20:19:16,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141729445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:16,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:16,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:16,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260386916] [2024-06-03 20:19:16,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:16,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:16,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:16,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:16,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:16,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:16,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 291 transitions, 4148 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:16,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:16,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:16,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:18,108 INFO L124 PetriNetUnfolderBase]: 3908/6165 cut-off events. [2024-06-03 20:19:18,108 INFO L125 PetriNetUnfolderBase]: For 226862/226862 co-relation queries the response was YES. [2024-06-03 20:19:18,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51398 conditions, 6165 events. 3908/6165 cut-off events. For 226862/226862 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 37072 event pairs, 1120 based on Foata normal form. 5/6169 useless extension candidates. Maximal degree in co-relation 51310. Up to 5785 conditions per place. [2024-06-03 20:19:18,172 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 264 selfloop transitions, 63 changer transitions 0/332 dead transitions. [2024-06-03 20:19:18,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 332 transitions, 5142 flow [2024-06-03 20:19:18,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-03 20:19:18,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:19:18,174 INFO L175 Difference]: Start difference. First operand has 173 places, 291 transitions, 4148 flow. Second operand 9 states and 189 transitions. [2024-06-03 20:19:18,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 332 transitions, 5142 flow [2024-06-03 20:19:18,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 332 transitions, 5042 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:18,381 INFO L231 Difference]: Finished difference. Result has 176 places, 296 transitions, 4348 flow [2024-06-03 20:19:18,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4048, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4348, PETRI_PLACES=176, PETRI_TRANSITIONS=296} [2024-06-03 20:19:18,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-03 20:19:18,382 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 296 transitions, 4348 flow [2024-06-03 20:19:18,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:18,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:18,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:18,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:19:18,383 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)] === [2024-06-03 20:19:18,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:18,383 INFO L85 PathProgramCache]: Analyzing trace with hash -267069536, now seen corresponding path program 3 times [2024-06-03 20:19:18,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:18,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94302638] [2024-06-03 20:19:18,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:18,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:19,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:19,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94302638] [2024-06-03 20:19:19,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94302638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:19,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:19,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:19,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294821044] [2024-06-03 20:19:19,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:19,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:19,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:19,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:19,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:19,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:19,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 296 transitions, 4348 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) [2024-06-03 20:19:19,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:19,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:19,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:20,402 INFO L124 PetriNetUnfolderBase]: 3925/6200 cut-off events. [2024-06-03 20:19:20,402 INFO L125 PetriNetUnfolderBase]: For 241107/241107 co-relation queries the response was YES. [2024-06-03 20:19:20,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52945 conditions, 6200 events. 3925/6200 cut-off events. For 241107/241107 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 37337 event pairs, 1122 based on Foata normal form. 4/6203 useless extension candidates. Maximal degree in co-relation 52856. Up to 5962 conditions per place. [2024-06-03 20:19:20,467 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 306 selfloop transitions, 16 changer transitions 0/327 dead transitions. [2024-06-03 20:19:20,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 327 transitions, 5166 flow [2024-06-03 20:19:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:20,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:19:20,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:19:20,469 INFO L175 Difference]: Start difference. First operand has 176 places, 296 transitions, 4348 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:19:20,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 327 transitions, 5166 flow [2024-06-03 20:19:20,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 327 transitions, 4912 flow, removed 69 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:20,774 INFO L231 Difference]: Finished difference. Result has 178 places, 300 transitions, 4235 flow [2024-06-03 20:19:20,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4094, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4235, PETRI_PLACES=178, PETRI_TRANSITIONS=300} [2024-06-03 20:19:20,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-03 20:19:20,774 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 300 transitions, 4235 flow [2024-06-03 20:19:20,774 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) [2024-06-03 20:19:20,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:20,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:20,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:19:20,775 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:20,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:20,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1800461466, now seen corresponding path program 2 times [2024-06-03 20:19:20,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:20,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643819984] [2024-06-03 20:19:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:20,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:21,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:21,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:21,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643819984] [2024-06-03 20:19:21,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643819984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:21,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:21,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:21,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759225868] [2024-06-03 20:19:21,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:21,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:21,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:21,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:21,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:21,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:21,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 300 transitions, 4235 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:21,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:21,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:21,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:23,343 INFO L124 PetriNetUnfolderBase]: 3989/6312 cut-off events. [2024-06-03 20:19:23,343 INFO L125 PetriNetUnfolderBase]: For 253726/253726 co-relation queries the response was YES. [2024-06-03 20:19:23,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53767 conditions, 6312 events. 3989/6312 cut-off events. For 253726/253726 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 38280 event pairs, 1083 based on Foata normal form. 5/6316 useless extension candidates. Maximal degree in co-relation 53676. Up to 5844 conditions per place. [2024-06-03 20:19:23,413 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 290 selfloop transitions, 57 changer transitions 0/352 dead transitions. [2024-06-03 20:19:23,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 352 transitions, 5411 flow [2024-06-03 20:19:23,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:19:23,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:19:23,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-03 20:19:23,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976190476190476 [2024-06-03 20:19:23,414 INFO L175 Difference]: Start difference. First operand has 178 places, 300 transitions, 4235 flow. Second operand 10 states and 209 transitions. [2024-06-03 20:19:23,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 352 transitions, 5411 flow [2024-06-03 20:19:23,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 352 transitions, 5306 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:23,708 INFO L231 Difference]: Finished difference. Result has 184 places, 311 transitions, 4529 flow [2024-06-03 20:19:23,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4130, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4529, PETRI_PLACES=184, PETRI_TRANSITIONS=311} [2024-06-03 20:19:23,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-03 20:19:23,709 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 311 transitions, 4529 flow [2024-06-03 20:19:23,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:23,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:23,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:23,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:19:23,709 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:23,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:23,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1461044372, now seen corresponding path program 4 times [2024-06-03 20:19:23,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:23,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188002599] [2024-06-03 20:19:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:23,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:24,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:24,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188002599] [2024-06-03 20:19:24,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188002599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:24,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:24,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:24,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318523712] [2024-06-03 20:19:24,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:24,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:24,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:24,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:24,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:24,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:24,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 311 transitions, 4529 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) [2024-06-03 20:19:24,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:24,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:24,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:25,807 INFO L124 PetriNetUnfolderBase]: 3981/6302 cut-off events. [2024-06-03 20:19:25,807 INFO L125 PetriNetUnfolderBase]: For 266364/266364 co-relation queries the response was YES. [2024-06-03 20:19:25,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54885 conditions, 6302 events. 3981/6302 cut-off events. For 266364/266364 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 38160 event pairs, 1129 based on Foata normal form. 4/6304 useless extension candidates. Maximal degree in co-relation 54792. Up to 6015 conditions per place. [2024-06-03 20:19:25,872 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 23 changer transitions 0/339 dead transitions. [2024-06-03 20:19:25,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 339 transitions, 5367 flow [2024-06-03 20:19:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:19:25,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:19:25,874 INFO L175 Difference]: Start difference. First operand has 184 places, 311 transitions, 4529 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:19:25,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 339 transitions, 5367 flow [2024-06-03 20:19:26,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 339 transitions, 5107 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:26,227 INFO L231 Difference]: Finished difference. Result has 186 places, 315 transitions, 4430 flow [2024-06-03 20:19:26,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4269, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4430, PETRI_PLACES=186, PETRI_TRANSITIONS=315} [2024-06-03 20:19:26,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-03 20:19:26,228 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 315 transitions, 4430 flow [2024-06-03 20:19:26,228 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) [2024-06-03 20:19:26,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:26,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:26,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:19:26,228 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:26,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1807692084, now seen corresponding path program 3 times [2024-06-03 20:19:26,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:26,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473625651] [2024-06-03 20:19:26,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:26,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:27,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:27,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473625651] [2024-06-03 20:19:27,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473625651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:27,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:27,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:27,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927594914] [2024-06-03 20:19:27,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:27,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:27,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:27,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:27,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:27,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:27,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 315 transitions, 4430 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:27,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:27,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:27,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:28,396 INFO L124 PetriNetUnfolderBase]: 4051/6409 cut-off events. [2024-06-03 20:19:28,396 INFO L125 PetriNetUnfolderBase]: For 283220/283220 co-relation queries the response was YES. [2024-06-03 20:19:28,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55956 conditions, 6409 events. 4051/6409 cut-off events. For 283220/283220 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 38910 event pairs, 896 based on Foata normal form. 5/6411 useless extension candidates. Maximal degree in co-relation 55861. Up to 4930 conditions per place. [2024-06-03 20:19:28,465 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 169 selfloop transitions, 194 changer transitions 0/368 dead transitions. [2024-06-03 20:19:28,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 368 transitions, 6086 flow [2024-06-03 20:19:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-03 20:19:28,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-03 20:19:28,467 INFO L175 Difference]: Start difference. First operand has 186 places, 315 transitions, 4430 flow. Second operand 9 states and 195 transitions. [2024-06-03 20:19:28,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 368 transitions, 6086 flow [2024-06-03 20:19:28,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 368 transitions, 5961 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:28,807 INFO L231 Difference]: Finished difference. Result has 191 places, 331 transitions, 5272 flow [2024-06-03 20:19:28,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4305, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5272, PETRI_PLACES=191, PETRI_TRANSITIONS=331} [2024-06-03 20:19:28,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-03 20:19:28,807 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 331 transitions, 5272 flow [2024-06-03 20:19:28,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:28,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:28,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:28,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:19:28,808 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:28,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:28,808 INFO L85 PathProgramCache]: Analyzing trace with hash -468420096, now seen corresponding path program 4 times [2024-06-03 20:19:28,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:28,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652109631] [2024-06-03 20:19:28,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:28,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:29,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:29,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652109631] [2024-06-03 20:19:29,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652109631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:29,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:29,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:29,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529805858] [2024-06-03 20:19:29,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:29,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:29,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:29,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:29,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:29,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:29,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 331 transitions, 5272 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:29,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:29,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:29,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:31,260 INFO L124 PetriNetUnfolderBase]: 4081/6471 cut-off events. [2024-06-03 20:19:31,261 INFO L125 PetriNetUnfolderBase]: For 307460/307460 co-relation queries the response was YES. [2024-06-03 20:19:31,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59224 conditions, 6471 events. 4081/6471 cut-off events. For 307460/307460 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 39631 event pairs, 946 based on Foata normal form. 5/6474 useless extension candidates. Maximal degree in co-relation 59127. Up to 5594 conditions per place. [2024-06-03 20:19:31,341 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 279 selfloop transitions, 96 changer transitions 0/380 dead transitions. [2024-06-03 20:19:31,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 380 transitions, 6582 flow [2024-06-03 20:19:31,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:19:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:19:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-03 20:19:31,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:19:31,342 INFO L175 Difference]: Start difference. First operand has 191 places, 331 transitions, 5272 flow. Second operand 10 states and 210 transitions. [2024-06-03 20:19:31,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 380 transitions, 6582 flow [2024-06-03 20:19:31,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 380 transitions, 6333 flow, removed 102 selfloop flow, removed 3 redundant places. [2024-06-03 20:19:31,795 INFO L231 Difference]: Finished difference. Result has 199 places, 337 transitions, 5442 flow [2024-06-03 20:19:31,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5033, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5442, PETRI_PLACES=199, PETRI_TRANSITIONS=337} [2024-06-03 20:19:31,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-03 20:19:31,795 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 337 transitions, 5442 flow [2024-06-03 20:19:31,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:31,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:31,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:31,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:19:31,796 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:31,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:31,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1770134520, now seen corresponding path program 5 times [2024-06-03 20:19:31,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:31,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350544178] [2024-06-03 20:19:31,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:31,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:32,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:32,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:32,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350544178] [2024-06-03 20:19:32,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350544178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:32,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:32,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:32,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247038855] [2024-06-03 20:19:32,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:32,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:32,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:32,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:32,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:32,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:32,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 337 transitions, 5442 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:32,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:32,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:32,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:34,436 INFO L124 PetriNetUnfolderBase]: 4121/6546 cut-off events. [2024-06-03 20:19:34,436 INFO L125 PetriNetUnfolderBase]: For 307148/307148 co-relation queries the response was YES. [2024-06-03 20:19:34,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59292 conditions, 6546 events. 4121/6546 cut-off events. For 307148/307148 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 40249 event pairs, 944 based on Foata normal form. 5/6549 useless extension candidates. Maximal degree in co-relation 59192. Up to 5620 conditions per place. [2024-06-03 20:19:34,529 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 290 selfloop transitions, 94 changer transitions 0/389 dead transitions. [2024-06-03 20:19:34,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 389 transitions, 6783 flow [2024-06-03 20:19:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:19:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:19:34,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-03 20:19:34,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023809523809524 [2024-06-03 20:19:34,530 INFO L175 Difference]: Start difference. First operand has 199 places, 337 transitions, 5442 flow. Second operand 10 states and 211 transitions. [2024-06-03 20:19:34,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 389 transitions, 6783 flow [2024-06-03 20:19:34,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 389 transitions, 6441 flow, removed 81 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:34,974 INFO L231 Difference]: Finished difference. Result has 204 places, 347 transitions, 5544 flow [2024-06-03 20:19:34,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5108, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5544, PETRI_PLACES=204, PETRI_TRANSITIONS=347} [2024-06-03 20:19:34,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-03 20:19:34,975 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 347 transitions, 5544 flow [2024-06-03 20:19:34,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:34,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:34,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:34,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:19:34,976 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:34,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1705168306, now seen corresponding path program 1 times [2024-06-03 20:19:34,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:34,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124127070] [2024-06-03 20:19:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:34,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:35,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:35,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124127070] [2024-06-03 20:19:35,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124127070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:35,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:35,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:35,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990189226] [2024-06-03 20:19:35,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:35,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:35,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:35,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:35,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:35,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:35,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 347 transitions, 5544 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:35,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:35,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:35,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:36,881 INFO L124 PetriNetUnfolderBase]: 4213/6680 cut-off events. [2024-06-03 20:19:36,881 INFO L125 PetriNetUnfolderBase]: For 325839/325839 co-relation queries the response was YES. [2024-06-03 20:19:36,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60845 conditions, 6680 events. 4213/6680 cut-off events. For 325839/325839 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 41136 event pairs, 1002 based on Foata normal form. 12/6690 useless extension candidates. Maximal degree in co-relation 60743. Up to 5735 conditions per place. [2024-06-03 20:19:36,958 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 292 selfloop transitions, 91 changer transitions 0/388 dead transitions. [2024-06-03 20:19:36,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 388 transitions, 7010 flow [2024-06-03 20:19:36,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:36,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 20:19:36,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-03 20:19:36,959 INFO L175 Difference]: Start difference. First operand has 204 places, 347 transitions, 5544 flow. Second operand 7 states and 143 transitions. [2024-06-03 20:19:36,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 388 transitions, 7010 flow [2024-06-03 20:19:37,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 388 transitions, 6636 flow, removed 85 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:37,430 INFO L231 Difference]: Finished difference. Result has 205 places, 364 transitions, 5796 flow [2024-06-03 20:19:37,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5194, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5796, PETRI_PLACES=205, PETRI_TRANSITIONS=364} [2024-06-03 20:19:37,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-03 20:19:37,431 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 364 transitions, 5796 flow [2024-06-03 20:19:37,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:37,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:37,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:37,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:19:37,432 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:37,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:37,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1281132642, now seen corresponding path program 2 times [2024-06-03 20:19:37,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:37,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066087928] [2024-06-03 20:19:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:37,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:38,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:38,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066087928] [2024-06-03 20:19:38,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066087928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:38,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:38,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:38,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437421439] [2024-06-03 20:19:38,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:38,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:38,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:38,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:38,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:38,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:38,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 364 transitions, 5796 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:38,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:38,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:38,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:39,409 INFO L124 PetriNetUnfolderBase]: 4243/6724 cut-off events. [2024-06-03 20:19:39,409 INFO L125 PetriNetUnfolderBase]: For 327974/327974 co-relation queries the response was YES. [2024-06-03 20:19:39,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61233 conditions, 6724 events. 4243/6724 cut-off events. For 327974/327974 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 41465 event pairs, 1180 based on Foata normal form. 6/6728 useless extension candidates. Maximal degree in co-relation 61129. Up to 6409 conditions per place. [2024-06-03 20:19:39,480 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 352 selfloop transitions, 25 changer transitions 0/382 dead transitions. [2024-06-03 20:19:39,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 382 transitions, 6749 flow [2024-06-03 20:19:39,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:39,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:39,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 20:19:39,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-03 20:19:39,482 INFO L175 Difference]: Start difference. First operand has 205 places, 364 transitions, 5796 flow. Second operand 7 states and 127 transitions. [2024-06-03 20:19:39,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 382 transitions, 6749 flow [2024-06-03 20:19:39,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 382 transitions, 6614 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 20:19:39,898 INFO L231 Difference]: Finished difference. Result has 209 places, 370 transitions, 5879 flow [2024-06-03 20:19:39,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5879, PETRI_PLACES=209, PETRI_TRANSITIONS=370} [2024-06-03 20:19:39,898 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-03 20:19:39,899 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 370 transitions, 5879 flow [2024-06-03 20:19:39,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:39,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:39,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:39,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:19:39,899 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:39,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:39,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1709809936, now seen corresponding path program 3 times [2024-06-03 20:19:39,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:39,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817583872] [2024-06-03 20:19:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:39,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:40,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:40,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817583872] [2024-06-03 20:19:40,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817583872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:40,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:40,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:19:40,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295727810] [2024-06-03 20:19:40,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:40,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:19:40,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:40,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:19:40,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:19:40,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:40,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 370 transitions, 5879 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:40,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:40,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:40,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:41,721 INFO L124 PetriNetUnfolderBase]: 4233/6699 cut-off events. [2024-06-03 20:19:41,721 INFO L125 PetriNetUnfolderBase]: For 333839/333839 co-relation queries the response was YES. [2024-06-03 20:19:41,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60612 conditions, 6699 events. 4233/6699 cut-off events. For 333839/333839 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 41216 event pairs, 1159 based on Foata normal form. 6/6703 useless extension candidates. Maximal degree in co-relation 60507. Up to 6290 conditions per place. [2024-06-03 20:19:41,802 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 340 selfloop transitions, 41 changer transitions 0/386 dead transitions. [2024-06-03 20:19:41,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 386 transitions, 6819 flow [2024-06-03 20:19:41,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:19:41,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:19:41,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 20:19:41,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-03 20:19:41,803 INFO L175 Difference]: Start difference. First operand has 209 places, 370 transitions, 5879 flow. Second operand 7 states and 131 transitions. [2024-06-03 20:19:41,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 386 transitions, 6819 flow [2024-06-03 20:19:42,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 386 transitions, 6727 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:42,229 INFO L231 Difference]: Finished difference. Result has 211 places, 370 transitions, 5881 flow [2024-06-03 20:19:42,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5787, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5881, PETRI_PLACES=211, PETRI_TRANSITIONS=370} [2024-06-03 20:19:42,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-03 20:19:42,230 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 370 transitions, 5881 flow [2024-06-03 20:19:42,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:42,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:42,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:42,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:19:42,231 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:42,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:42,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1794795862, now seen corresponding path program 1 times [2024-06-03 20:19:42,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:42,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105595064] [2024-06-03 20:19:42,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:42,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:42,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:43,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:43,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:43,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105595064] [2024-06-03 20:19:43,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105595064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:43,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:43,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:19:43,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590333245] [2024-06-03 20:19:43,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:43,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:19:43,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:43,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:19:43,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:19:43,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:43,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 370 transitions, 5881 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:43,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:43,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:43,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:44,541 INFO L124 PetriNetUnfolderBase]: 4272/6772 cut-off events. [2024-06-03 20:19:44,541 INFO L125 PetriNetUnfolderBase]: For 350077/350077 co-relation queries the response was YES. [2024-06-03 20:19:44,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61169 conditions, 6772 events. 4272/6772 cut-off events. For 350077/350077 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 41671 event pairs, 1168 based on Foata normal form. 14/6783 useless extension candidates. Maximal degree in co-relation 61065. Up to 6355 conditions per place. [2024-06-03 20:19:44,619 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 49 changer transitions 0/392 dead transitions. [2024-06-03 20:19:44,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 392 transitions, 6864 flow [2024-06-03 20:19:44,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:44,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 20:19:44,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-03 20:19:44,621 INFO L175 Difference]: Start difference. First operand has 211 places, 370 transitions, 5881 flow. Second operand 8 states and 147 transitions. [2024-06-03 20:19:44,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 392 transitions, 6864 flow [2024-06-03 20:19:45,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 392 transitions, 6440 flow, removed 38 selfloop flow, removed 11 redundant places. [2024-06-03 20:19:45,081 INFO L231 Difference]: Finished difference. Result has 209 places, 374 transitions, 5629 flow [2024-06-03 20:19:45,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5459, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5629, PETRI_PLACES=209, PETRI_TRANSITIONS=374} [2024-06-03 20:19:45,082 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-03 20:19:45,082 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 374 transitions, 5629 flow [2024-06-03 20:19:45,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:45,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:45,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:45,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:19:45,083 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:45,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:45,084 INFO L85 PathProgramCache]: Analyzing trace with hash 491251441, now seen corresponding path program 1 times [2024-06-03 20:19:45,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:45,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582079109] [2024-06-03 20:19:45,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:45,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:45,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:45,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:45,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582079109] [2024-06-03 20:19:45,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582079109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:45,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:45,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:45,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326248408] [2024-06-03 20:19:45,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:45,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:45,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:46,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:46,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 374 transitions, 5629 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:46,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:46,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:46,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:47,460 INFO L124 PetriNetUnfolderBase]: 4496/7119 cut-off events. [2024-06-03 20:19:47,460 INFO L125 PetriNetUnfolderBase]: For 363604/363604 co-relation queries the response was YES. [2024-06-03 20:19:47,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63986 conditions, 7119 events. 4496/7119 cut-off events. For 363604/363604 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 44167 event pairs, 1172 based on Foata normal form. 6/7124 useless extension candidates. Maximal degree in co-relation 63884. Up to 6547 conditions per place. [2024-06-03 20:19:47,544 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 384 selfloop transitions, 71 changer transitions 0/460 dead transitions. [2024-06-03 20:19:47,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 460 transitions, 7699 flow [2024-06-03 20:19:47,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:19:47,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:19:47,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-03 20:19:47,545 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4857142857142857 [2024-06-03 20:19:47,545 INFO L175 Difference]: Start difference. First operand has 209 places, 374 transitions, 5629 flow. Second operand 10 states and 204 transitions. [2024-06-03 20:19:47,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 460 transitions, 7699 flow [2024-06-03 20:19:48,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 460 transitions, 7572 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:48,085 INFO L231 Difference]: Finished difference. Result has 219 places, 411 transitions, 6388 flow [2024-06-03 20:19:48,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5526, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6388, PETRI_PLACES=219, PETRI_TRANSITIONS=411} [2024-06-03 20:19:48,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-03 20:19:48,086 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 411 transitions, 6388 flow [2024-06-03 20:19:48,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:48,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:48,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:48,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:19:48,087 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:48,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:48,087 INFO L85 PathProgramCache]: Analyzing trace with hash -686027765, now seen corresponding path program 2 times [2024-06-03 20:19:48,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:48,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057196437] [2024-06-03 20:19:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:48,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:49,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:49,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057196437] [2024-06-03 20:19:49,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057196437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:49,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:49,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:49,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074013726] [2024-06-03 20:19:49,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:49,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:49,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:49,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:49,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:49,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:49,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 411 transitions, 6388 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:49,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:49,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:49,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:50,679 INFO L124 PetriNetUnfolderBase]: 4742/7498 cut-off events. [2024-06-03 20:19:50,680 INFO L125 PetriNetUnfolderBase]: For 426456/426456 co-relation queries the response was YES. [2024-06-03 20:19:50,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69532 conditions, 7498 events. 4742/7498 cut-off events. For 426456/426456 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 46826 event pairs, 1141 based on Foata normal form. 16/7513 useless extension candidates. Maximal degree in co-relation 69424. Up to 6492 conditions per place. [2024-06-03 20:19:50,769 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 367 selfloop transitions, 90 changer transitions 0/462 dead transitions. [2024-06-03 20:19:50,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 462 transitions, 8080 flow [2024-06-03 20:19:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-03 20:19:50,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-03 20:19:50,770 INFO L175 Difference]: Start difference. First operand has 219 places, 411 transitions, 6388 flow. Second operand 9 states and 196 transitions. [2024-06-03 20:19:50,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 462 transitions, 8080 flow [2024-06-03 20:19:51,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 462 transitions, 7923 flow, removed 68 selfloop flow, removed 2 redundant places. [2024-06-03 20:19:51,429 INFO L231 Difference]: Finished difference. Result has 227 places, 417 transitions, 6669 flow [2024-06-03 20:19:51,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6231, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6669, PETRI_PLACES=227, PETRI_TRANSITIONS=417} [2024-06-03 20:19:51,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-03 20:19:51,430 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 417 transitions, 6669 flow [2024-06-03 20:19:51,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:51,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:51,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:51,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:19:51,431 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:51,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:51,432 INFO L85 PathProgramCache]: Analyzing trace with hash -86255425, now seen corresponding path program 3 times [2024-06-03 20:19:51,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:51,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294982174] [2024-06-03 20:19:51,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:51,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:52,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:52,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:52,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294982174] [2024-06-03 20:19:52,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294982174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:52,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:52,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:52,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628459231] [2024-06-03 20:19:52,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:52,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:52,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:52,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:52,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:52,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:52,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 417 transitions, 6669 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:52,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:52,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:52,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:54,097 INFO L124 PetriNetUnfolderBase]: 4738/7498 cut-off events. [2024-06-03 20:19:54,097 INFO L125 PetriNetUnfolderBase]: For 435480/435480 co-relation queries the response was YES. [2024-06-03 20:19:54,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69945 conditions, 7498 events. 4738/7498 cut-off events. For 435480/435480 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 46922 event pairs, 1203 based on Foata normal form. 22/7519 useless extension candidates. Maximal degree in co-relation 69834. Up to 6843 conditions per place. [2024-06-03 20:19:54,196 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 368 selfloop transitions, 87 changer transitions 0/460 dead transitions. [2024-06-03 20:19:54,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 460 transitions, 8043 flow [2024-06-03 20:19:54,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:54,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-03 20:19:54,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-03 20:19:54,216 INFO L175 Difference]: Start difference. First operand has 227 places, 417 transitions, 6669 flow. Second operand 9 states and 191 transitions. [2024-06-03 20:19:54,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 460 transitions, 8043 flow [2024-06-03 20:19:55,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 460 transitions, 7838 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:55,026 INFO L231 Difference]: Finished difference. Result has 231 places, 422 transitions, 6846 flow [2024-06-03 20:19:55,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6474, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6846, PETRI_PLACES=231, PETRI_TRANSITIONS=422} [2024-06-03 20:19:55,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-03 20:19:55,027 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 422 transitions, 6846 flow [2024-06-03 20:19:55,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:55,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:55,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:55,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:19:55,028 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:55,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:55,028 INFO L85 PathProgramCache]: Analyzing trace with hash -174969055, now seen corresponding path program 4 times [2024-06-03 20:19:55,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:55,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475930342] [2024-06-03 20:19:55,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:55,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:55,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:55,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475930342] [2024-06-03 20:19:55,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475930342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:55,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:55,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:55,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641668533] [2024-06-03 20:19:55,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:55,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:55,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:55,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:55,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:55,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:55,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 422 transitions, 6846 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:55,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:55,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:55,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:57,552 INFO L124 PetriNetUnfolderBase]: 4889/7732 cut-off events. [2024-06-03 20:19:57,552 INFO L125 PetriNetUnfolderBase]: For 439286/439286 co-relation queries the response was YES. [2024-06-03 20:19:57,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72201 conditions, 7732 events. 4889/7732 cut-off events. For 439286/439286 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 48504 event pairs, 1129 based on Foata normal form. 14/7745 useless extension candidates. Maximal degree in co-relation 72088. Up to 7068 conditions per place. [2024-06-03 20:19:57,644 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 406 selfloop transitions, 61 changer transitions 0/472 dead transitions. [2024-06-03 20:19:57,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 472 transitions, 8430 flow [2024-06-03 20:19:57,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-03 20:19:57,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-03 20:19:57,645 INFO L175 Difference]: Start difference. First operand has 231 places, 422 transitions, 6846 flow. Second operand 9 states and 191 transitions. [2024-06-03 20:19:57,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 472 transitions, 8430 flow [2024-06-03 20:19:58,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 472 transitions, 8206 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:58,292 INFO L231 Difference]: Finished difference. Result has 236 places, 431 transitions, 7068 flow [2024-06-03 20:19:58,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6622, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7068, PETRI_PLACES=236, PETRI_TRANSITIONS=431} [2024-06-03 20:19:58,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-03 20:19:58,293 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 431 transitions, 7068 flow [2024-06-03 20:19:58,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:58,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:58,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:58,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:19:58,293 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)] === [2024-06-03 20:19:58,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:58,294 INFO L85 PathProgramCache]: Analyzing trace with hash -86249473, now seen corresponding path program 1 times [2024-06-03 20:19:58,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:58,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124031232] [2024-06-03 20:19:58,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:58,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:59,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:59,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124031232] [2024-06-03 20:19:59,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124031232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:59,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:59,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:19:59,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307374451] [2024-06-03 20:19:59,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:59,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:19:59,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:19:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:19:59,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:59,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 431 transitions, 7068 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:59,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:59,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:59,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:01,612 INFO L124 PetriNetUnfolderBase]: 5124/8131 cut-off events. [2024-06-03 20:20:01,612 INFO L125 PetriNetUnfolderBase]: For 530055/530055 co-relation queries the response was YES. [2024-06-03 20:20:01,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76518 conditions, 8131 events. 5124/8131 cut-off events. For 530055/530055 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 51841 event pairs, 1345 based on Foata normal form. 58/8188 useless extension candidates. Maximal degree in co-relation 76402. Up to 6956 conditions per place. [2024-06-03 20:20:01,717 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 377 selfloop transitions, 96 changer transitions 0/478 dead transitions. [2024-06-03 20:20:01,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 478 transitions, 8464 flow [2024-06-03 20:20:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:20:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:20:01,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-03 20:20:01,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2024-06-03 20:20:01,718 INFO L175 Difference]: Start difference. First operand has 236 places, 431 transitions, 7068 flow. Second operand 10 states and 213 transitions. [2024-06-03 20:20:01,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 478 transitions, 8464 flow [2024-06-03 20:20:02,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 478 transitions, 8256 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-03 20:20:02,636 INFO L231 Difference]: Finished difference. Result has 242 places, 433 transitions, 7187 flow [2024-06-03 20:20:02,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6860, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7187, PETRI_PLACES=242, PETRI_TRANSITIONS=433} [2024-06-03 20:20:02,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-03 20:20:02,636 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 433 transitions, 7187 flow [2024-06-03 20:20:02,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:02,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:02,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:02,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:20:02,637 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:02,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:02,637 INFO L85 PathProgramCache]: Analyzing trace with hash 32501537, now seen corresponding path program 5 times [2024-06-03 20:20:02,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:02,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234549893] [2024-06-03 20:20:02,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:02,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:03,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:03,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234549893] [2024-06-03 20:20:03,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234549893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:03,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:03,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:03,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674125200] [2024-06-03 20:20:03,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:03,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:03,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:03,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:03,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:03,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:03,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 433 transitions, 7187 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:03,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:03,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:03,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:05,375 INFO L124 PetriNetUnfolderBase]: 5286/8381 cut-off events. [2024-06-03 20:20:05,375 INFO L125 PetriNetUnfolderBase]: For 516945/516945 co-relation queries the response was YES. [2024-06-03 20:20:05,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79819 conditions, 8381 events. 5286/8381 cut-off events. For 516945/516945 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 53642 event pairs, 1324 based on Foata normal form. 16/8396 useless extension candidates. Maximal degree in co-relation 79701. Up to 7566 conditions per place. [2024-06-03 20:20:05,483 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 427 selfloop transitions, 56 changer transitions 0/488 dead transitions. [2024-06-03 20:20:05,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 488 transitions, 9022 flow [2024-06-03 20:20:05,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:05,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:05,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-03 20:20:05,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132275132275133 [2024-06-03 20:20:05,484 INFO L175 Difference]: Start difference. First operand has 242 places, 433 transitions, 7187 flow. Second operand 9 states and 194 transitions. [2024-06-03 20:20:05,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 488 transitions, 9022 flow [2024-06-03 20:20:06,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 488 transitions, 8781 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-03 20:20:06,745 INFO L231 Difference]: Finished difference. Result has 245 places, 444 transitions, 7398 flow [2024-06-03 20:20:06,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6946, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7398, PETRI_PLACES=245, PETRI_TRANSITIONS=444} [2024-06-03 20:20:06,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-03 20:20:06,746 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 444 transitions, 7398 flow [2024-06-03 20:20:06,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:06,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:06,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:06,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:20:06,747 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:06,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:06,747 INFO L85 PathProgramCache]: Analyzing trace with hash -712148751, now seen corresponding path program 2 times [2024-06-03 20:20:06,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:06,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823598011] [2024-06-03 20:20:06,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:06,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:07,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:07,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:07,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823598011] [2024-06-03 20:20:07,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823598011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:07,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:07,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:20:07,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134057235] [2024-06-03 20:20:07,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:07,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:20:07,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:07,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:20:07,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:20:08,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:08,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 444 transitions, 7398 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:08,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:08,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:08,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:10,234 INFO L124 PetriNetUnfolderBase]: 5598/8913 cut-off events. [2024-06-03 20:20:10,234 INFO L125 PetriNetUnfolderBase]: For 602361/602361 co-relation queries the response was YES. [2024-06-03 20:20:10,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84696 conditions, 8913 events. 5598/8913 cut-off events. For 602361/602361 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 57886 event pairs, 1418 based on Foata normal form. 58/8970 useless extension candidates. Maximal degree in co-relation 84575. Up to 7863 conditions per place. [2024-06-03 20:20:10,343 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 419 selfloop transitions, 74 changer transitions 0/498 dead transitions. [2024-06-03 20:20:10,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 498 transitions, 8941 flow [2024-06-03 20:20:10,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:20:10,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:20:10,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-03 20:20:10,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5043290043290043 [2024-06-03 20:20:10,345 INFO L175 Difference]: Start difference. First operand has 245 places, 444 transitions, 7398 flow. Second operand 11 states and 233 transitions. [2024-06-03 20:20:10,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 498 transitions, 8941 flow [2024-06-03 20:20:11,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 498 transitions, 8775 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-03 20:20:11,383 INFO L231 Difference]: Finished difference. Result has 253 places, 449 transitions, 7591 flow [2024-06-03 20:20:11,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7240, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7591, PETRI_PLACES=253, PETRI_TRANSITIONS=449} [2024-06-03 20:20:11,384 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-03 20:20:11,384 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 449 transitions, 7591 flow [2024-06-03 20:20:11,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:11,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:11,385 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:11,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:20:11,385 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:11,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:11,385 INFO L85 PathProgramCache]: Analyzing trace with hash 232166399, now seen corresponding path program 3 times [2024-06-03 20:20:11,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:11,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982552684] [2024-06-03 20:20:11,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:11,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:11,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:12,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:12,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982552684] [2024-06-03 20:20:12,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982552684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:12,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:12,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:20:12,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858989018] [2024-06-03 20:20:12,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:12,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:20:12,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:12,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:20:12,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:20:12,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:12,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 449 transitions, 7591 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:12,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:12,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:12,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:14,876 INFO L124 PetriNetUnfolderBase]: 6401/10312 cut-off events. [2024-06-03 20:20:14,876 INFO L125 PetriNetUnfolderBase]: For 683414/683414 co-relation queries the response was YES. [2024-06-03 20:20:14,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96331 conditions, 10312 events. 6401/10312 cut-off events. For 683414/683414 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 69410 event pairs, 1602 based on Foata normal form. 48/10359 useless extension candidates. Maximal degree in co-relation 96208. Up to 7467 conditions per place. [2024-06-03 20:20:15,005 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 358 selfloop transitions, 166 changer transitions 0/529 dead transitions. [2024-06-03 20:20:15,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 529 transitions, 10042 flow [2024-06-03 20:20:15,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:20:15,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:20:15,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-03 20:20:15,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2024-06-03 20:20:15,006 INFO L175 Difference]: Start difference. First operand has 253 places, 449 transitions, 7591 flow. Second operand 10 states and 223 transitions. [2024-06-03 20:20:15,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 529 transitions, 10042 flow [2024-06-03 20:20:16,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 529 transitions, 9859 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-03 20:20:16,318 INFO L231 Difference]: Finished difference. Result has 259 places, 472 transitions, 8564 flow [2024-06-03 20:20:16,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7408, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8564, PETRI_PLACES=259, PETRI_TRANSITIONS=472} [2024-06-03 20:20:16,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-03 20:20:16,318 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 472 transitions, 8564 flow [2024-06-03 20:20:16,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:16,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:16,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:16,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:20:16,319 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:16,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:16,320 INFO L85 PathProgramCache]: Analyzing trace with hash 236583194, now seen corresponding path program 1 times [2024-06-03 20:20:16,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:16,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672732619] [2024-06-03 20:20:16,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:16,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:16,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:16,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:16,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:16,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672732619] [2024-06-03 20:20:16,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672732619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:16,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:16,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:20:16,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889598727] [2024-06-03 20:20:16,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:16,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:20:16,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:16,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:20:16,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:20:17,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:17,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 472 transitions, 8564 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:17,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:17,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:17,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:19,141 INFO L124 PetriNetUnfolderBase]: 6389/10277 cut-off events. [2024-06-03 20:20:19,141 INFO L125 PetriNetUnfolderBase]: For 638033/638033 co-relation queries the response was YES. [2024-06-03 20:20:19,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97367 conditions, 10277 events. 6389/10277 cut-off events. For 638033/638033 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 69169 event pairs, 1994 based on Foata normal form. 4/10280 useless extension candidates. Maximal degree in co-relation 97239. Up to 9772 conditions per place. [2024-06-03 20:20:19,290 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 435 selfloop transitions, 52 changer transitions 0/492 dead transitions. [2024-06-03 20:20:19,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 492 transitions, 9727 flow [2024-06-03 20:20:19,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:20:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:20:19,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-03 20:20:19,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-03 20:20:19,292 INFO L175 Difference]: Start difference. First operand has 259 places, 472 transitions, 8564 flow. Second operand 7 states and 142 transitions. [2024-06-03 20:20:19,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 492 transitions, 9727 flow [2024-06-03 20:20:21,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 492 transitions, 9470 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-03 20:20:21,190 INFO L231 Difference]: Finished difference. Result has 262 places, 472 transitions, 8425 flow [2024-06-03 20:20:21,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8307, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8425, PETRI_PLACES=262, PETRI_TRANSITIONS=472} [2024-06-03 20:20:21,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-03 20:20:21,191 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 472 transitions, 8425 flow [2024-06-03 20:20:21,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:21,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:21,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:21,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:20:21,191 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:21,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:21,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1641091080, now seen corresponding path program 2 times [2024-06-03 20:20:21,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:21,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415257218] [2024-06-03 20:20:21,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:21,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:21,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:21,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415257218] [2024-06-03 20:20:21,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415257218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:21,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:21,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:20:21,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468231809] [2024-06-03 20:20:21,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:21,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:20:21,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:21,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:20:21,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:20:21,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:21,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 472 transitions, 8425 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:21,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:21,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:21,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:24,645 INFO L124 PetriNetUnfolderBase]: 6399/10301 cut-off events. [2024-06-03 20:20:24,645 INFO L125 PetriNetUnfolderBase]: For 639171/639171 co-relation queries the response was YES. [2024-06-03 20:20:24,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96881 conditions, 10301 events. 6399/10301 cut-off events. For 639171/639171 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 69546 event pairs, 2017 based on Foata normal form. 2/10302 useless extension candidates. Maximal degree in co-relation 96752. Up to 9930 conditions per place. [2024-06-03 20:20:24,880 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 458 selfloop transitions, 30 changer transitions 0/493 dead transitions. [2024-06-03 20:20:24,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 493 transitions, 9604 flow [2024-06-03 20:20:24,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:20:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:20:24,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 20:20:24,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-03 20:20:24,885 INFO L175 Difference]: Start difference. First operand has 262 places, 472 transitions, 8425 flow. Second operand 7 states and 132 transitions. [2024-06-03 20:20:24,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 493 transitions, 9604 flow [2024-06-03 20:20:26,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 493 transitions, 9514 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 20:20:26,176 INFO L231 Difference]: Finished difference. Result has 265 places, 478 transitions, 8554 flow [2024-06-03 20:20:26,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8340, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8554, PETRI_PLACES=265, PETRI_TRANSITIONS=478} [2024-06-03 20:20:26,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-03 20:20:26,177 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 478 transitions, 8554 flow [2024-06-03 20:20:26,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:26,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:26,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:26,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:20:26,177 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)] === [2024-06-03 20:20:26,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:26,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1167210635, now seen corresponding path program 6 times [2024-06-03 20:20:26,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:26,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362926839] [2024-06-03 20:20:26,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:26,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:27,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:27,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362926839] [2024-06-03 20:20:27,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362926839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:27,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:27,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:27,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319988545] [2024-06-03 20:20:27,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:27,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:27,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:27,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:27,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:27,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:27,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 478 transitions, 8554 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:27,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:27,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:27,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:30,245 INFO L124 PetriNetUnfolderBase]: 6569/10570 cut-off events. [2024-06-03 20:20:30,245 INFO L125 PetriNetUnfolderBase]: For 707257/707257 co-relation queries the response was YES. [2024-06-03 20:20:30,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100199 conditions, 10570 events. 6569/10570 cut-off events. For 707257/707257 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 71481 event pairs, 1764 based on Foata normal form. 16/10583 useless extension candidates. Maximal degree in co-relation 100069. Up to 9022 conditions per place. [2024-06-03 20:20:30,524 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 425 selfloop transitions, 104 changer transitions 0/534 dead transitions. [2024-06-03 20:20:30,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 534 transitions, 10703 flow [2024-06-03 20:20:30,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-03 20:20:30,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-06-03 20:20:30,525 INFO L175 Difference]: Start difference. First operand has 265 places, 478 transitions, 8554 flow. Second operand 9 states and 196 transitions. [2024-06-03 20:20:30,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 534 transitions, 10703 flow [2024-06-03 20:20:31,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 534 transitions, 10630 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 20:20:31,881 INFO L231 Difference]: Finished difference. Result has 272 places, 487 transitions, 9063 flow [2024-06-03 20:20:31,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8481, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9063, PETRI_PLACES=272, PETRI_TRANSITIONS=487} [2024-06-03 20:20:31,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-03 20:20:31,882 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 487 transitions, 9063 flow [2024-06-03 20:20:31,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:31,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:31,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:31,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:20:31,882 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)] === [2024-06-03 20:20:31,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:31,883 INFO L85 PathProgramCache]: Analyzing trace with hash -2135627107, now seen corresponding path program 4 times [2024-06-03 20:20:31,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:31,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55638056] [2024-06-03 20:20:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:31,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:32,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:32,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:32,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55638056] [2024-06-03 20:20:32,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55638056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:32,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:32,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:20:32,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003514553] [2024-06-03 20:20:32,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:32,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:20:32,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:32,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:20:32,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:20:33,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:33,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 487 transitions, 9063 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:33,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:33,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:33,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:36,338 INFO L124 PetriNetUnfolderBase]: 7086/11463 cut-off events. [2024-06-03 20:20:36,339 INFO L125 PetriNetUnfolderBase]: For 906039/906039 co-relation queries the response was YES. [2024-06-03 20:20:36,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112342 conditions, 11463 events. 7086/11463 cut-off events. For 906039/906039 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 79244 event pairs, 1899 based on Foata normal form. 54/11514 useless extension candidates. Maximal degree in co-relation 112209. Up to 8792 conditions per place. [2024-06-03 20:20:36,491 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 420 selfloop transitions, 123 changer transitions 0/548 dead transitions. [2024-06-03 20:20:36,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 548 transitions, 11265 flow [2024-06-03 20:20:36,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:20:36,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:20:36,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-03 20:20:36,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-03 20:20:36,492 INFO L175 Difference]: Start difference. First operand has 272 places, 487 transitions, 9063 flow. Second operand 10 states and 222 transitions. [2024-06-03 20:20:36,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 548 transitions, 11265 flow [2024-06-03 20:20:38,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 548 transitions, 11041 flow, removed 73 selfloop flow, removed 3 redundant places. [2024-06-03 20:20:38,309 INFO L231 Difference]: Finished difference. Result has 279 places, 492 transitions, 9393 flow [2024-06-03 20:20:38,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8847, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9393, PETRI_PLACES=279, PETRI_TRANSITIONS=492} [2024-06-03 20:20:38,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-03 20:20:38,310 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 492 transitions, 9393 flow [2024-06-03 20:20:38,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:38,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:38,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:38,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:20:38,311 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)] === [2024-06-03 20:20:38,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash -2135894017, now seen corresponding path program 5 times [2024-06-03 20:20:38,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:38,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83470626] [2024-06-03 20:20:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:38,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:39,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:39,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83470626] [2024-06-03 20:20:39,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83470626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:39,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:39,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:20:39,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957682380] [2024-06-03 20:20:39,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:39,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:20:39,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:39,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:20:39,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:20:39,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:39,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 492 transitions, 9393 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:39,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:39,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:39,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:43,250 INFO L124 PetriNetUnfolderBase]: 7174/11619 cut-off events. [2024-06-03 20:20:43,251 INFO L125 PetriNetUnfolderBase]: For 886019/886019 co-relation queries the response was YES. [2024-06-03 20:20:43,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111514 conditions, 11619 events. 7174/11619 cut-off events. For 886019/886019 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 80717 event pairs, 2066 based on Foata normal form. 58/11674 useless extension candidates. Maximal degree in co-relation 111379. Up to 9985 conditions per place. [2024-06-03 20:20:43,408 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 420 selfloop transitions, 121 changer transitions 0/546 dead transitions. [2024-06-03 20:20:43,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 546 transitions, 11071 flow [2024-06-03 20:20:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:20:43,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:20:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-03 20:20:43,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5086580086580087 [2024-06-03 20:20:43,409 INFO L175 Difference]: Start difference. First operand has 279 places, 492 transitions, 9393 flow. Second operand 11 states and 235 transitions. [2024-06-03 20:20:43,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 546 transitions, 11071 flow [2024-06-03 20:20:45,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 546 transitions, 10815 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-03 20:20:45,223 INFO L231 Difference]: Finished difference. Result has 284 places, 495 transitions, 9464 flow [2024-06-03 20:20:45,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9137, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9464, PETRI_PLACES=284, PETRI_TRANSITIONS=495} [2024-06-03 20:20:45,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-03 20:20:45,224 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 495 transitions, 9464 flow [2024-06-03 20:20:45,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:45,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:45,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:45,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:20:45,224 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)] === [2024-06-03 20:20:45,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:45,225 INFO L85 PathProgramCache]: Analyzing trace with hash 110087739, now seen corresponding path program 6 times [2024-06-03 20:20:45,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:45,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010719323] [2024-06-03 20:20:45,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:45,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:46,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:46,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:46,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010719323] [2024-06-03 20:20:46,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010719323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:46,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:46,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:20:46,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613113651] [2024-06-03 20:20:46,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:46,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:20:46,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:46,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:20:46,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:20:46,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:46,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 495 transitions, 9464 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:46,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:46,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:46,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:50,488 INFO L124 PetriNetUnfolderBase]: 8490/13927 cut-off events. [2024-06-03 20:20:50,489 INFO L125 PetriNetUnfolderBase]: For 1115965/1115965 co-relation queries the response was YES. [2024-06-03 20:20:50,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134202 conditions, 13927 events. 8490/13927 cut-off events. For 1115965/1115965 co-relation queries the response was YES. Maximal size of possible extension queue 737. Compared 101281 event pairs, 2458 based on Foata normal form. 48/13970 useless extension candidates. Maximal degree in co-relation 134065. Up to 6337 conditions per place. [2024-06-03 20:20:50,677 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 292 selfloop transitions, 272 changer transitions 0/569 dead transitions. [2024-06-03 20:20:50,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 569 transitions, 12179 flow [2024-06-03 20:20:50,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:20:50,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:20:50,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 227 transitions. [2024-06-03 20:20:50,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5404761904761904 [2024-06-03 20:20:50,678 INFO L175 Difference]: Start difference. First operand has 284 places, 495 transitions, 9464 flow. Second operand 10 states and 227 transitions. [2024-06-03 20:20:50,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 569 transitions, 12179 flow [2024-06-03 20:20:52,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 569 transitions, 11846 flow, removed 38 selfloop flow, removed 10 redundant places. [2024-06-03 20:20:52,817 INFO L231 Difference]: Finished difference. Result has 286 places, 504 transitions, 10132 flow [2024-06-03 20:20:52,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9134, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=264, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10132, PETRI_PLACES=286, PETRI_TRANSITIONS=504} [2024-06-03 20:20:52,817 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-03 20:20:52,818 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 504 transitions, 10132 flow [2024-06-03 20:20:52,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:52,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:52,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:52,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:20:52,818 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)] === [2024-06-03 20:20:52,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:52,819 INFO L85 PathProgramCache]: Analyzing trace with hash -203611491, now seen corresponding path program 7 times [2024-06-03 20:20:52,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:52,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601155011] [2024-06-03 20:20:52,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:52,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:52,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:53,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:53,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601155011] [2024-06-03 20:20:53,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601155011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:53,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:53,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:20:53,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651973695] [2024-06-03 20:20:53,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:53,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:20:53,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:20:53,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:20:54,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:54,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 504 transitions, 10132 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:54,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:54,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:54,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:58,313 INFO L124 PetriNetUnfolderBase]: 9093/14927 cut-off events. [2024-06-03 20:20:58,313 INFO L125 PetriNetUnfolderBase]: For 1280233/1280233 co-relation queries the response was YES. [2024-06-03 20:20:58,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147508 conditions, 14927 events. 9093/14927 cut-off events. For 1280233/1280233 co-relation queries the response was YES. Maximal size of possible extension queue 806. Compared 110962 event pairs, 2794 based on Foata normal form. 48/14970 useless extension candidates. Maximal degree in co-relation 147368. Up to 11904 conditions per place. [2024-06-03 20:20:58,527 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 294 selfloop transitions, 266 changer transitions 0/565 dead transitions. [2024-06-03 20:20:58,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 565 transitions, 12518 flow [2024-06-03 20:20:58,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:20:58,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:20:58,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-03 20:20:58,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-06-03 20:20:58,529 INFO L175 Difference]: Start difference. First operand has 286 places, 504 transitions, 10132 flow. Second operand 10 states and 224 transitions. [2024-06-03 20:20:58,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 565 transitions, 12518 flow [2024-06-03 20:21:01,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 565 transitions, 12075 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-03 20:21:01,023 INFO L231 Difference]: Finished difference. Result has 292 places, 512 transitions, 10628 flow [2024-06-03 20:21:01,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9689, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10628, PETRI_PLACES=292, PETRI_TRANSITIONS=512} [2024-06-03 20:21:01,024 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-03 20:21:01,024 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 512 transitions, 10628 flow [2024-06-03 20:21:01,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:01,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:01,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:01,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:21:01,024 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:01,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:01,025 INFO L85 PathProgramCache]: Analyzing trace with hash -203878401, now seen corresponding path program 8 times [2024-06-03 20:21:01,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:01,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866888147] [2024-06-03 20:21:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:01,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:02,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:02,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:02,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866888147] [2024-06-03 20:21:02,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866888147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:02,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:02,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:21:02,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044852097] [2024-06-03 20:21:02,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:02,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:21:02,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:02,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:21:02,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:21:02,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:21:02,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 512 transitions, 10628 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:02,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:02,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:21:02,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:06,312 INFO L124 PetriNetUnfolderBase]: 9013/14802 cut-off events. [2024-06-03 20:21:06,312 INFO L125 PetriNetUnfolderBase]: For 1239575/1239575 co-relation queries the response was YES. [2024-06-03 20:21:06,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144760 conditions, 14802 events. 9013/14802 cut-off events. For 1239575/1239575 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 110051 event pairs, 2886 based on Foata normal form. 58/14855 useless extension candidates. Maximal degree in co-relation 144617. Up to 12376 conditions per place. [2024-06-03 20:21:06,806 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 290 selfloop transitions, 262 changer transitions 0/557 dead transitions. [2024-06-03 20:21:06,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 557 transitions, 12336 flow [2024-06-03 20:21:06,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:21:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:21:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-03 20:21:06,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2024-06-03 20:21:06,807 INFO L175 Difference]: Start difference. First operand has 292 places, 512 transitions, 10628 flow. Second operand 10 states and 217 transitions. [2024-06-03 20:21:06,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 557 transitions, 12336 flow [2024-06-03 20:21:09,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 557 transitions, 11827 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-03 20:21:09,341 INFO L231 Difference]: Finished difference. Result has 295 places, 512 transitions, 10652 flow [2024-06-03 20:21:09,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10119, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10652, PETRI_PLACES=295, PETRI_TRANSITIONS=512} [2024-06-03 20:21:09,342 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-03 20:21:09,342 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 512 transitions, 10652 flow [2024-06-03 20:21:09,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:09,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:09,342 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:09,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:21:09,342 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:09,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:09,345 INFO L85 PathProgramCache]: Analyzing trace with hash 723717775, now seen corresponding path program 9 times [2024-06-03 20:21:09,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:09,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898309235] [2024-06-03 20:21:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:09,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:10,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:10,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898309235] [2024-06-03 20:21:10,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898309235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:10,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:10,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:21:10,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952298373] [2024-06-03 20:21:10,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:10,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:21:10,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:10,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:21:10,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:21:10,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:21:10,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 512 transitions, 10652 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:10,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:10,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:21:10,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:15,107 INFO L124 PetriNetUnfolderBase]: 9535/15751 cut-off events. [2024-06-03 20:21:15,108 INFO L125 PetriNetUnfolderBase]: For 1391189/1391189 co-relation queries the response was YES. [2024-06-03 20:21:15,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154615 conditions, 15751 events. 9535/15751 cut-off events. For 1391189/1391189 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 119326 event pairs, 3225 based on Foata normal form. 72/15820 useless extension candidates. Maximal degree in co-relation 154471. Up to 12399 conditions per place.